ERC-20
Add Token to MetaMask (Web3)Overview
Max Total Supply
26,899,480.869854 BONSAI
Holders
130
Total Transfers
-
Market
Price
$0.00 @ 0.000000 ETH
Onchain Market Cap
$0.00
Circulating Supply Market Cap
-
Other Info
Token Contract (WITH 18 Decimals)
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This contract may be a proxy contract. Click on More Options and select Is this a proxy? to confirm and enable the "Read as Proxy" & "Write as Proxy" tabs.
Contract Name:
BonsaiOFT
Compiler Version
v0.8.22-1.0.1
ZkSolc Version
v1.5.3
Optimization Enabled:
Yes with Mode 3
Other Settings:
shanghai EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.22;
import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {LibString} from "solady/utils/LibString.sol";
import {SafeTransferLib} from "solady/utils/SafeTransferLib.sol";
import {DN404} from "dn404-adjustable/DN404.sol";
import {DN404Mirror} from "dn404-adjustable/DN404Mirror.sol";
import {OFTCore} from "@layerzerolabs/oft-evm/contracts/OFTCore.sol";
contract BonsaiOFT is DN404, OFTCore {
string private _baseURI;
DN404Mirror public mirror;
constructor(
uint96 _tokensPerNft,
address _lzEndpoint,
address _delegate
) OFTCore(decimals(), _lzEndpoint, _delegate) Ownable(_delegate) {
mirror = new DN404Mirror(msg.sender);
// not minting any tokens as the OG Bonsai contract already minted the entire supply
_initializeDN404(0, address(0), address(mirror), _tokensPerNft);
}
function name() public pure override returns (string memory) {
return "Bonsai Token";
}
function symbol() public pure override returns (string memory) {
return "BONSAI";
}
function tokenURI(uint256 tokenId) public view override returns (string memory result) {
if (bytes(_baseURI).length != 0) {
result = string(abi.encodePacked(_baseURI, LibString.toString(tokenId), ".json"));
}
}
function setBaseURI(string calldata baseURI_) public onlyOwner {
_baseURI = baseURI_;
}
// OFT
/**
* @dev Retrieves the address of the underlying ERC20 implementation.
* @return The address of the OFT token.
*
* @dev In the case of OFT, address(this) and erc20 are the same contract.
*/
function token() public view returns (address) {
return address(this);
}
/**
* @notice Indicates whether the OFT contract requires approval of the 'token()' to send.
* @return requiresApproval Needs approval of the underlying token implementation.
*
* @dev In the case of OFT where the contract IS the token, approval is NOT required.
*/
function approvalRequired() external pure virtual returns (bool) {
return false;
}
/**
* @dev Burns tokens from the sender's specified balance.
* @param _from The address to debit the tokens from.
* @param _amountLD The amount of tokens to send in local decimals.
* @param _minAmountLD The minimum amount to send in local decimals.
* @param _dstEid The destination chain ID.
* @return amountSentLD The amount sent in local decimals.
* @return amountReceivedLD The amount received in local decimals on the remote.
*/
function _debit(
address _from,
uint256 _amountLD,
uint256 _minAmountLD,
uint32 _dstEid
) internal virtual override returns (uint256 amountSentLD, uint256 amountReceivedLD) {
(amountSentLD, amountReceivedLD) = _debitView(_amountLD, _minAmountLD, _dstEid);
// @dev In NON-default OFT, amountSentLD could be 100, with a 10% fee, the amountReceivedLD amount is 90,
// therefore amountSentLD CAN differ from amountReceivedLD.
// @dev Default OFT burns on src.
_burn(_from, amountSentLD);
}
/**
* @dev Credits tokens to the specified address.
* @param _to The address to credit the tokens to.
* @param _amountLD The amount of tokens to credit in local decimals.
* @dev _srcEid The source chain ID.
* @return amountReceivedLD The amount of tokens ACTUALLY received in local decimals.
*/
function _credit(
address _to,
uint256 _amountLD,
uint32 /*_srcEid*/
) internal virtual override returns (uint256 amountReceivedLD) {
if (_to == address(0x0)) _to = address(0xdead); // _mint(...) does not support address(0x0)
// @dev Default OFT mints on dst.
_mint(_to, _amountLD);
// @dev In the case of NON-default OFT, the _amountLD MIGHT not be == amountReceivedLD.
return _amountLD;
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
/// @notice Library for converting numbers into strings and other string operations.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/LibString.sol)
/// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/LibString.sol)
///
/// @dev Note:
/// For performance and bytecode compactness, most of the string operations are restricted to
/// byte strings (7-bit ASCII), except where otherwise specified.
/// Usage of byte string operations on charsets with runes spanning two or more bytes
/// can lead to undefined behavior.
library LibString {
/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
/* CUSTOM ERRORS */
/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
/// @dev The length of the output is too small to contain all the hex digits.
error HexLengthInsufficient();
/// @dev The length of the string is more than 32 bytes.
error TooBigForSmallString();
/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
/* CONSTANTS */
/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
/// @dev The constant returned when the `search` is not found in the string.
uint256 internal constant NOT_FOUND = type(uint256).max;
/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
/* DECIMAL OPERATIONS */
/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
/// @dev Returns the base 10 decimal representation of `value`.
function toString(uint256 value) internal pure returns (string memory str) {
/// @solidity memory-safe-assembly
assembly {
// The maximum value of a uint256 contains 78 digits (1 byte per digit), but
// we allocate 0xa0 bytes to keep the free memory pointer 32-byte word aligned.
// We will need 1 word for the trailing zeros padding, 1 word for the length,
// and 3 words for a maximum of 78 digits.
str := add(mload(0x40), 0x80)
// Update the free memory pointer to allocate.
mstore(0x40, add(str, 0x20))
// Zeroize the slot after the string.
mstore(str, 0)
// Cache the end of the memory to calculate the length later.
let end := str
let w := not(0) // Tsk.
// We write the string from rightmost digit to leftmost digit.
// The following is essentially a do-while loop that also handles the zero case.
for { let temp := value } 1 {} {
str := add(str, w) // `sub(str, 1)`.
// Write the character to the pointer.
// The ASCII index of the '0' character is 48.
mstore8(str, add(48, mod(temp, 10)))
// Keep dividing `temp` until zero.
temp := div(temp, 10)
if iszero(temp) { break }
}
let length := sub(end, str)
// Move the pointer 32 bytes leftwards to make room for the length.
str := sub(str, 0x20)
// Store the length.
mstore(str, length)
}
}
/// @dev Returns the base 10 decimal representation of `value`.
function toString(int256 value) internal pure returns (string memory str) {
if (value >= 0) {
return toString(uint256(value));
}
unchecked {
str = toString(~uint256(value) + 1);
}
/// @solidity memory-safe-assembly
assembly {
// We still have some spare memory space on the left,
// as we have allocated 3 words (96 bytes) for up to 78 digits.
let length := mload(str) // Load the string length.
mstore(str, 0x2d) // Store the '-' character.
str := sub(str, 1) // Move back the string pointer by a byte.
mstore(str, add(length, 1)) // Update the string length.
}
}
/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
/* HEXADECIMAL OPERATIONS */
/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
/// @dev Returns the hexadecimal representation of `value`,
/// left-padded to an input length of `length` bytes.
/// The output is prefixed with "0x" encoded using 2 hexadecimal digits per byte,
/// giving a total length of `length * 2 + 2` bytes.
/// Reverts if `length` is too small for the output to contain all the digits.
function toHexString(uint256 value, uint256 length) internal pure returns (string memory str) {
str = toHexStringNoPrefix(value, length);
/// @solidity memory-safe-assembly
assembly {
let strLength := add(mload(str), 2) // Compute the length.
mstore(str, 0x3078) // Write the "0x" prefix.
str := sub(str, 2) // Move the pointer.
mstore(str, strLength) // Write the length.
}
}
/// @dev Returns the hexadecimal representation of `value`,
/// left-padded to an input length of `length` bytes.
/// The output is prefixed with "0x" encoded using 2 hexadecimal digits per byte,
/// giving a total length of `length * 2` bytes.
/// Reverts if `length` is too small for the output to contain all the digits.
function toHexStringNoPrefix(uint256 value, uint256 length)
internal
pure
returns (string memory str)
{
/// @solidity memory-safe-assembly
assembly {
// We need 0x20 bytes for the trailing zeros padding, `length * 2` bytes
// for the digits, 0x02 bytes for the prefix, and 0x20 bytes for the length.
// We add 0x20 to the total and round down to a multiple of 0x20.
// (0x20 + 0x20 + 0x02 + 0x20) = 0x62.
str := add(mload(0x40), and(add(shl(1, length), 0x42), not(0x1f)))
// Allocate the memory.
mstore(0x40, add(str, 0x20))
// Zeroize the slot after the string.
mstore(str, 0)
// Cache the end to calculate the length later.
let end := str
// Store "0123456789abcdef" in scratch space.
mstore(0x0f, 0x30313233343536373839616263646566)
let start := sub(str, add(length, length))
let w := not(1) // Tsk.
let temp := value
// We write the string from rightmost digit to leftmost digit.
// The following is essentially a do-while loop that also handles the zero case.
for {} 1 {} {
str := add(str, w) // `sub(str, 2)`.
mstore8(add(str, 1), mload(and(temp, 15)))
mstore8(str, mload(and(shr(4, temp), 15)))
temp := shr(8, temp)
if iszero(xor(str, start)) { break }
}
if temp {
mstore(0x00, 0x2194895a) // `HexLengthInsufficient()`.
revert(0x1c, 0x04)
}
// Compute the string's length.
let strLength := sub(end, str)
// Move the pointer and write the length.
str := sub(str, 0x20)
mstore(str, strLength)
}
}
/// @dev Returns the hexadecimal representation of `value`.
/// The output is prefixed with "0x" and encoded using 2 hexadecimal digits per byte.
/// As address are 20 bytes long, the output will left-padded to have
/// a length of `20 * 2 + 2` bytes.
function toHexString(uint256 value) internal pure returns (string memory str) {
str = toHexStringNoPrefix(value);
/// @solidity memory-safe-assembly
assembly {
let strLength := add(mload(str), 2) // Compute the length.
mstore(str, 0x3078) // Write the "0x" prefix.
str := sub(str, 2) // Move the pointer.
mstore(str, strLength) // Write the length.
}
}
/// @dev Returns the hexadecimal representation of `value`.
/// The output is prefixed with "0x".
/// The output excludes leading "0" from the `toHexString` output.
/// `0x00: "0x0", 0x01: "0x1", 0x12: "0x12", 0x123: "0x123"`.
function toMinimalHexString(uint256 value) internal pure returns (string memory str) {
str = toHexStringNoPrefix(value);
/// @solidity memory-safe-assembly
assembly {
let o := eq(byte(0, mload(add(str, 0x20))), 0x30) // Whether leading zero is present.
let strLength := add(mload(str), 2) // Compute the length.
mstore(add(str, o), 0x3078) // Write the "0x" prefix, accounting for leading zero.
str := sub(add(str, o), 2) // Move the pointer, accounting for leading zero.
mstore(str, sub(strLength, o)) // Write the length, accounting for leading zero.
}
}
/// @dev Returns the hexadecimal representation of `value`.
/// The output excludes leading "0" from the `toHexStringNoPrefix` output.
/// `0x00: "0", 0x01: "1", 0x12: "12", 0x123: "123"`.
function toMinimalHexStringNoPrefix(uint256 value) internal pure returns (string memory str) {
str = toHexStringNoPrefix(value);
/// @solidity memory-safe-assembly
assembly {
let o := eq(byte(0, mload(add(str, 0x20))), 0x30) // Whether leading zero is present.
let strLength := mload(str) // Get the length.
str := add(str, o) // Move the pointer, accounting for leading zero.
mstore(str, sub(strLength, o)) // Write the length, accounting for leading zero.
}
}
/// @dev Returns the hexadecimal representation of `value`.
/// The output is encoded using 2 hexadecimal digits per byte.
/// As address are 20 bytes long, the output will left-padded to have
/// a length of `20 * 2` bytes.
function toHexStringNoPrefix(uint256 value) internal pure returns (string memory str) {
/// @solidity memory-safe-assembly
assembly {
// We need 0x20 bytes for the trailing zeros padding, 0x20 bytes for the length,
// 0x02 bytes for the prefix, and 0x40 bytes for the digits.
// The next multiple of 0x20 above (0x20 + 0x20 + 0x02 + 0x40) is 0xa0.
str := add(mload(0x40), 0x80)
// Allocate the memory.
mstore(0x40, add(str, 0x20))
// Zeroize the slot after the string.
mstore(str, 0)
// Cache the end to calculate the length later.
let end := str
// Store "0123456789abcdef" in scratch space.
mstore(0x0f, 0x30313233343536373839616263646566)
let w := not(1) // Tsk.
// We write the string from rightmost digit to leftmost digit.
// The following is essentially a do-while loop that also handles the zero case.
for { let temp := value } 1 {} {
str := add(str, w) // `sub(str, 2)`.
mstore8(add(str, 1), mload(and(temp, 15)))
mstore8(str, mload(and(shr(4, temp), 15)))
temp := shr(8, temp)
if iszero(temp) { break }
}
// Compute the string's length.
let strLength := sub(end, str)
// Move the pointer and write the length.
str := sub(str, 0x20)
mstore(str, strLength)
}
}
/// @dev Returns the hexadecimal representation of `value`.
/// The output is prefixed with "0x", encoded using 2 hexadecimal digits per byte,
/// and the alphabets are capitalized conditionally according to
/// https://eips.ethereum.org/EIPS/eip-55
function toHexStringChecksummed(address value) internal pure returns (string memory str) {
str = toHexString(value);
/// @solidity memory-safe-assembly
assembly {
let mask := shl(6, div(not(0), 255)) // `0b010000000100000000 ...`
let o := add(str, 0x22)
let hashed := and(keccak256(o, 40), mul(34, mask)) // `0b10001000 ... `
let t := shl(240, 136) // `0b10001000 << 240`
for { let i := 0 } 1 {} {
mstore(add(i, i), mul(t, byte(i, hashed)))
i := add(i, 1)
if eq(i, 20) { break }
}
mstore(o, xor(mload(o), shr(1, and(mload(0x00), and(mload(o), mask)))))
o := add(o, 0x20)
mstore(o, xor(mload(o), shr(1, and(mload(0x20), and(mload(o), mask)))))
}
}
/// @dev Returns the hexadecimal representation of `value`.
/// The output is prefixed with "0x" and encoded using 2 hexadecimal digits per byte.
function toHexString(address value) internal pure returns (string memory str) {
str = toHexStringNoPrefix(value);
/// @solidity memory-safe-assembly
assembly {
let strLength := add(mload(str), 2) // Compute the length.
mstore(str, 0x3078) // Write the "0x" prefix.
str := sub(str, 2) // Move the pointer.
mstore(str, strLength) // Write the length.
}
}
/// @dev Returns the hexadecimal representation of `value`.
/// The output is encoded using 2 hexadecimal digits per byte.
function toHexStringNoPrefix(address value) internal pure returns (string memory str) {
/// @solidity memory-safe-assembly
assembly {
str := mload(0x40)
// Allocate the memory.
// We need 0x20 bytes for the trailing zeros padding, 0x20 bytes for the length,
// 0x02 bytes for the prefix, and 0x28 bytes for the digits.
// The next multiple of 0x20 above (0x20 + 0x20 + 0x02 + 0x28) is 0x80.
mstore(0x40, add(str, 0x80))
// Store "0123456789abcdef" in scratch space.
mstore(0x0f, 0x30313233343536373839616263646566)
str := add(str, 2)
mstore(str, 40)
let o := add(str, 0x20)
mstore(add(o, 40), 0)
value := shl(96, value)
// We write the string from rightmost digit to leftmost digit.
// The following is essentially a do-while loop that also handles the zero case.
for { let i := 0 } 1 {} {
let p := add(o, add(i, i))
let temp := byte(i, value)
mstore8(add(p, 1), mload(and(temp, 15)))
mstore8(p, mload(shr(4, temp)))
i := add(i, 1)
if eq(i, 20) { break }
}
}
}
/// @dev Returns the hex encoded string from the raw bytes.
/// The output is encoded using 2 hexadecimal digits per byte.
function toHexString(bytes memory raw) internal pure returns (string memory str) {
str = toHexStringNoPrefix(raw);
/// @solidity memory-safe-assembly
assembly {
let strLength := add(mload(str), 2) // Compute the length.
mstore(str, 0x3078) // Write the "0x" prefix.
str := sub(str, 2) // Move the pointer.
mstore(str, strLength) // Write the length.
}
}
/// @dev Returns the hex encoded string from the raw bytes.
/// The output is encoded using 2 hexadecimal digits per byte.
function toHexStringNoPrefix(bytes memory raw) internal pure returns (string memory str) {
/// @solidity memory-safe-assembly
assembly {
let length := mload(raw)
str := add(mload(0x40), 2) // Skip 2 bytes for the optional prefix.
mstore(str, add(length, length)) // Store the length of the output.
// Store "0123456789abcdef" in scratch space.
mstore(0x0f, 0x30313233343536373839616263646566)
let o := add(str, 0x20)
let end := add(raw, length)
for {} iszero(eq(raw, end)) {} {
raw := add(raw, 1)
mstore8(add(o, 1), mload(and(mload(raw), 15)))
mstore8(o, mload(and(shr(4, mload(raw)), 15)))
o := add(o, 2)
}
mstore(o, 0) // Zeroize the slot after the string.
mstore(0x40, add(o, 0x20)) // Allocate the memory.
}
}
/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
/* RUNE STRING OPERATIONS */
/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
/// @dev Returns the number of UTF characters in the string.
function runeCount(string memory s) internal pure returns (uint256 result) {
/// @solidity memory-safe-assembly
assembly {
if mload(s) {
mstore(0x00, div(not(0), 255))
mstore(0x20, 0x0202020202020202020202020202020202020202020202020303030304040506)
let o := add(s, 0x20)
let end := add(o, mload(s))
for { result := 1 } 1 { result := add(result, 1) } {
o := add(o, byte(0, mload(shr(250, mload(o)))))
if iszero(lt(o, end)) { break }
}
}
}
}
/// @dev Returns if this string is a 7-bit ASCII string.
/// (i.e. all characters codes are in [0..127])
function is7BitASCII(string memory s) internal pure returns (bool result) {
/// @solidity memory-safe-assembly
assembly {
let mask := shl(7, div(not(0), 255))
result := 1
let n := mload(s)
if n {
let o := add(s, 0x20)
let end := add(o, n)
let last := mload(end)
mstore(end, 0)
for {} 1 {} {
if and(mask, mload(o)) {
result := 0
break
}
o := add(o, 0x20)
if iszero(lt(o, end)) { break }
}
mstore(end, last)
}
}
}
/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
/* BYTE STRING OPERATIONS */
/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
// For performance and bytecode compactness, byte string operations are restricted
// to 7-bit ASCII strings. All offsets are byte offsets, not UTF character offsets.
// Usage of byte string operations on charsets with runes spanning two or more bytes
// can lead to undefined behavior.
/// @dev Returns `subject` all occurrences of `search` replaced with `replacement`.
function replace(string memory subject, string memory search, string memory replacement)
internal
pure
returns (string memory result)
{
/// @solidity memory-safe-assembly
assembly {
let subjectLength := mload(subject)
let searchLength := mload(search)
let replacementLength := mload(replacement)
subject := add(subject, 0x20)
search := add(search, 0x20)
replacement := add(replacement, 0x20)
result := add(mload(0x40), 0x20)
let subjectEnd := add(subject, subjectLength)
if iszero(gt(searchLength, subjectLength)) {
let subjectSearchEnd := add(sub(subjectEnd, searchLength), 1)
let h := 0
if iszero(lt(searchLength, 0x20)) { h := keccak256(search, searchLength) }
let m := shl(3, sub(0x20, and(searchLength, 0x1f)))
let s := mload(search)
for {} 1 {} {
let t := mload(subject)
// Whether the first `searchLength % 32` bytes of
// `subject` and `search` matches.
if iszero(shr(m, xor(t, s))) {
if h {
if iszero(eq(keccak256(subject, searchLength), h)) {
mstore(result, t)
result := add(result, 1)
subject := add(subject, 1)
if iszero(lt(subject, subjectSearchEnd)) { break }
continue
}
}
// Copy the `replacement` one word at a time.
for { let o := 0 } 1 {} {
mstore(add(result, o), mload(add(replacement, o)))
o := add(o, 0x20)
if iszero(lt(o, replacementLength)) { break }
}
result := add(result, replacementLength)
subject := add(subject, searchLength)
if searchLength {
if iszero(lt(subject, subjectSearchEnd)) { break }
continue
}
}
mstore(result, t)
result := add(result, 1)
subject := add(subject, 1)
if iszero(lt(subject, subjectSearchEnd)) { break }
}
}
let resultRemainder := result
result := add(mload(0x40), 0x20)
let k := add(sub(resultRemainder, result), sub(subjectEnd, subject))
// Copy the rest of the string one word at a time.
for {} lt(subject, subjectEnd) {} {
mstore(resultRemainder, mload(subject))
resultRemainder := add(resultRemainder, 0x20)
subject := add(subject, 0x20)
}
result := sub(result, 0x20)
let last := add(add(result, 0x20), k) // Zeroize the slot after the string.
mstore(last, 0)
mstore(0x40, add(last, 0x20)) // Allocate the memory.
mstore(result, k) // Store the length.
}
}
/// @dev Returns the byte index of the first location of `search` in `subject`,
/// searching from left to right, starting from `from`.
/// Returns `NOT_FOUND` (i.e. `type(uint256).max`) if the `search` is not found.
function indexOf(string memory subject, string memory search, uint256 from)
internal
pure
returns (uint256 result)
{
/// @solidity memory-safe-assembly
assembly {
for { let subjectLength := mload(subject) } 1 {} {
if iszero(mload(search)) {
if iszero(gt(from, subjectLength)) {
result := from
break
}
result := subjectLength
break
}
let searchLength := mload(search)
let subjectStart := add(subject, 0x20)
result := not(0) // Initialize to `NOT_FOUND`.
subject := add(subjectStart, from)
let end := add(sub(add(subjectStart, subjectLength), searchLength), 1)
let m := shl(3, sub(0x20, and(searchLength, 0x1f)))
let s := mload(add(search, 0x20))
if iszero(and(lt(subject, end), lt(from, subjectLength))) { break }
if iszero(lt(searchLength, 0x20)) {
for { let h := keccak256(add(search, 0x20), searchLength) } 1 {} {
if iszero(shr(m, xor(mload(subject), s))) {
if eq(keccak256(subject, searchLength), h) {
result := sub(subject, subjectStart)
break
}
}
subject := add(subject, 1)
if iszero(lt(subject, end)) { break }
}
break
}
for {} 1 {} {
if iszero(shr(m, xor(mload(subject), s))) {
result := sub(subject, subjectStart)
break
}
subject := add(subject, 1)
if iszero(lt(subject, end)) { break }
}
break
}
}
}
/// @dev Returns the byte index of the first location of `search` in `subject`,
/// searching from left to right.
/// Returns `NOT_FOUND` (i.e. `type(uint256).max`) if the `search` is not found.
function indexOf(string memory subject, string memory search)
internal
pure
returns (uint256 result)
{
result = indexOf(subject, search, 0);
}
/// @dev Returns the byte index of the first location of `search` in `subject`,
/// searching from right to left, starting from `from`.
/// Returns `NOT_FOUND` (i.e. `type(uint256).max`) if the `search` is not found.
function lastIndexOf(string memory subject, string memory search, uint256 from)
internal
pure
returns (uint256 result)
{
/// @solidity memory-safe-assembly
assembly {
for {} 1 {} {
result := not(0) // Initialize to `NOT_FOUND`.
let searchLength := mload(search)
if gt(searchLength, mload(subject)) { break }
let w := result
let fromMax := sub(mload(subject), searchLength)
if iszero(gt(fromMax, from)) { from := fromMax }
let end := add(add(subject, 0x20), w)
subject := add(add(subject, 0x20), from)
if iszero(gt(subject, end)) { break }
// As this function is not too often used,
// we shall simply use keccak256 for smaller bytecode size.
for { let h := keccak256(add(search, 0x20), searchLength) } 1 {} {
if eq(keccak256(subject, searchLength), h) {
result := sub(subject, add(end, 1))
break
}
subject := add(subject, w) // `sub(subject, 1)`.
if iszero(gt(subject, end)) { break }
}
break
}
}
}
/// @dev Returns the byte index of the first location of `search` in `subject`,
/// searching from right to left.
/// Returns `NOT_FOUND` (i.e. `type(uint256).max`) if the `search` is not found.
function lastIndexOf(string memory subject, string memory search)
internal
pure
returns (uint256 result)
{
result = lastIndexOf(subject, search, uint256(int256(-1)));
}
/// @dev Returns true if `search` is found in `subject`, false otherwise.
function contains(string memory subject, string memory search) internal pure returns (bool) {
return indexOf(subject, search) != NOT_FOUND;
}
/// @dev Returns whether `subject` starts with `search`.
function startsWith(string memory subject, string memory search)
internal
pure
returns (bool result)
{
/// @solidity memory-safe-assembly
assembly {
let searchLength := mload(search)
// Just using keccak256 directly is actually cheaper.
// forgefmt: disable-next-item
result := and(
iszero(gt(searchLength, mload(subject))),
eq(
keccak256(add(subject, 0x20), searchLength),
keccak256(add(search, 0x20), searchLength)
)
)
}
}
/// @dev Returns whether `subject` ends with `search`.
function endsWith(string memory subject, string memory search)
internal
pure
returns (bool result)
{
/// @solidity memory-safe-assembly
assembly {
let searchLength := mload(search)
let subjectLength := mload(subject)
// Whether `search` is not longer than `subject`.
let withinRange := iszero(gt(searchLength, subjectLength))
// Just using keccak256 directly is actually cheaper.
// forgefmt: disable-next-item
result := and(
withinRange,
eq(
keccak256(
// `subject + 0x20 + max(subjectLength - searchLength, 0)`.
add(add(subject, 0x20), mul(withinRange, sub(subjectLength, searchLength))),
searchLength
),
keccak256(add(search, 0x20), searchLength)
)
)
}
}
/// @dev Returns `subject` repeated `times`.
function repeat(string memory subject, uint256 times)
internal
pure
returns (string memory result)
{
/// @solidity memory-safe-assembly
assembly {
let subjectLength := mload(subject)
if iszero(or(iszero(times), iszero(subjectLength))) {
subject := add(subject, 0x20)
result := mload(0x40)
let output := add(result, 0x20)
for {} 1 {} {
// Copy the `subject` one word at a time.
for { let o := 0 } 1 {} {
mstore(add(output, o), mload(add(subject, o)))
o := add(o, 0x20)
if iszero(lt(o, subjectLength)) { break }
}
output := add(output, subjectLength)
times := sub(times, 1)
if iszero(times) { break }
}
mstore(output, 0) // Zeroize the slot after the string.
let resultLength := sub(output, add(result, 0x20))
mstore(result, resultLength) // Store the length.
// Allocate the memory.
mstore(0x40, add(result, add(resultLength, 0x20)))
}
}
}
/// @dev Returns a copy of `subject` sliced from `start` to `end` (exclusive).
/// `start` and `end` are byte offsets.
function slice(string memory subject, uint256 start, uint256 end)
internal
pure
returns (string memory result)
{
/// @solidity memory-safe-assembly
assembly {
let subjectLength := mload(subject)
if iszero(gt(subjectLength, end)) { end := subjectLength }
if iszero(gt(subjectLength, start)) { start := subjectLength }
if lt(start, end) {
result := mload(0x40)
let resultLength := sub(end, start)
mstore(result, resultLength)
subject := add(subject, start)
let w := not(0x1f)
// Copy the `subject` one word at a time, backwards.
for { let o := and(add(resultLength, 0x1f), w) } 1 {} {
mstore(add(result, o), mload(add(subject, o)))
o := add(o, w) // `sub(o, 0x20)`.
if iszero(o) { break }
}
// Zeroize the slot after the string.
mstore(add(add(result, 0x20), resultLength), 0)
// Allocate memory for the length and the bytes,
// rounded up to a multiple of 32.
mstore(0x40, add(result, and(add(resultLength, 0x3f), w)))
}
}
}
/// @dev Returns a copy of `subject` sliced from `start` to the end of the string.
/// `start` is a byte offset.
function slice(string memory subject, uint256 start)
internal
pure
returns (string memory result)
{
result = slice(subject, start, uint256(int256(-1)));
}
/// @dev Returns all the indices of `search` in `subject`.
/// The indices are byte offsets.
function indicesOf(string memory subject, string memory search)
internal
pure
returns (uint256[] memory result)
{
/// @solidity memory-safe-assembly
assembly {
let subjectLength := mload(subject)
let searchLength := mload(search)
if iszero(gt(searchLength, subjectLength)) {
subject := add(subject, 0x20)
search := add(search, 0x20)
result := add(mload(0x40), 0x20)
let subjectStart := subject
let subjectSearchEnd := add(sub(add(subject, subjectLength), searchLength), 1)
let h := 0
if iszero(lt(searchLength, 0x20)) { h := keccak256(search, searchLength) }
let m := shl(3, sub(0x20, and(searchLength, 0x1f)))
let s := mload(search)
for {} 1 {} {
let t := mload(subject)
// Whether the first `searchLength % 32` bytes of
// `subject` and `search` matches.
if iszero(shr(m, xor(t, s))) {
if h {
if iszero(eq(keccak256(subject, searchLength), h)) {
subject := add(subject, 1)
if iszero(lt(subject, subjectSearchEnd)) { break }
continue
}
}
// Append to `result`.
mstore(result, sub(subject, subjectStart))
result := add(result, 0x20)
// Advance `subject` by `searchLength`.
subject := add(subject, searchLength)
if searchLength {
if iszero(lt(subject, subjectSearchEnd)) { break }
continue
}
}
subject := add(subject, 1)
if iszero(lt(subject, subjectSearchEnd)) { break }
}
let resultEnd := result
// Assign `result` to the free memory pointer.
result := mload(0x40)
// Store the length of `result`.
mstore(result, shr(5, sub(resultEnd, add(result, 0x20))))
// Allocate memory for result.
// We allocate one more word, so this array can be recycled for {split}.
mstore(0x40, add(resultEnd, 0x20))
}
}
}
/// @dev Returns a arrays of strings based on the `delimiter` inside of the `subject` string.
function split(string memory subject, string memory delimiter)
internal
pure
returns (string[] memory result)
{
uint256[] memory indices = indicesOf(subject, delimiter);
/// @solidity memory-safe-assembly
assembly {
let w := not(0x1f)
let indexPtr := add(indices, 0x20)
let indicesEnd := add(indexPtr, shl(5, add(mload(indices), 1)))
mstore(add(indicesEnd, w), mload(subject))
mstore(indices, add(mload(indices), 1))
let prevIndex := 0
for {} 1 {} {
let index := mload(indexPtr)
mstore(indexPtr, 0x60)
if iszero(eq(index, prevIndex)) {
let element := mload(0x40)
let elementLength := sub(index, prevIndex)
mstore(element, elementLength)
// Copy the `subject` one word at a time, backwards.
for { let o := and(add(elementLength, 0x1f), w) } 1 {} {
mstore(add(element, o), mload(add(add(subject, prevIndex), o)))
o := add(o, w) // `sub(o, 0x20)`.
if iszero(o) { break }
}
// Zeroize the slot after the string.
mstore(add(add(element, 0x20), elementLength), 0)
// Allocate memory for the length and the bytes,
// rounded up to a multiple of 32.
mstore(0x40, add(element, and(add(elementLength, 0x3f), w)))
// Store the `element` into the array.
mstore(indexPtr, element)
}
prevIndex := add(index, mload(delimiter))
indexPtr := add(indexPtr, 0x20)
if iszero(lt(indexPtr, indicesEnd)) { break }
}
result := indices
if iszero(mload(delimiter)) {
result := add(indices, 0x20)
mstore(result, sub(mload(indices), 2))
}
}
}
/// @dev Returns a concatenated string of `a` and `b`.
/// Cheaper than `string.concat()` and does not de-align the free memory pointer.
function concat(string memory a, string memory b)
internal
pure
returns (string memory result)
{
/// @solidity memory-safe-assembly
assembly {
let w := not(0x1f)
result := mload(0x40)
let aLength := mload(a)
// Copy `a` one word at a time, backwards.
for { let o := and(add(aLength, 0x20), w) } 1 {} {
mstore(add(result, o), mload(add(a, o)))
o := add(o, w) // `sub(o, 0x20)`.
if iszero(o) { break }
}
let bLength := mload(b)
let output := add(result, aLength)
// Copy `b` one word at a time, backwards.
for { let o := and(add(bLength, 0x20), w) } 1 {} {
mstore(add(output, o), mload(add(b, o)))
o := add(o, w) // `sub(o, 0x20)`.
if iszero(o) { break }
}
let totalLength := add(aLength, bLength)
let last := add(add(result, 0x20), totalLength)
// Zeroize the slot after the string.
mstore(last, 0)
// Stores the length.
mstore(result, totalLength)
// Allocate memory for the length and the bytes,
// rounded up to a multiple of 32.
mstore(0x40, and(add(last, 0x1f), w))
}
}
/// @dev Returns a copy of the string in either lowercase or UPPERCASE.
/// WARNING! This function is only compatible with 7-bit ASCII strings.
function toCase(string memory subject, bool toUpper)
internal
pure
returns (string memory result)
{
/// @solidity memory-safe-assembly
assembly {
let length := mload(subject)
if length {
result := add(mload(0x40), 0x20)
subject := add(subject, 1)
let flags := shl(add(70, shl(5, toUpper)), 0x3ffffff)
let w := not(0)
for { let o := length } 1 {} {
o := add(o, w)
let b := and(0xff, mload(add(subject, o)))
mstore8(add(result, o), xor(b, and(shr(b, flags), 0x20)))
if iszero(o) { break }
}
result := mload(0x40)
mstore(result, length) // Store the length.
let last := add(add(result, 0x20), length)
mstore(last, 0) // Zeroize the slot after the string.
mstore(0x40, add(last, 0x20)) // Allocate the memory.
}
}
}
/// @dev Returns a string from a small bytes32 string.
/// `s` must be null-terminated, or behavior will be undefined.
function fromSmallString(bytes32 s) internal pure returns (string memory result) {
/// @solidity memory-safe-assembly
assembly {
result := mload(0x40)
let n := 0
for {} byte(n, s) { n := add(n, 1) } {} // Scan for '\0'.
mstore(result, n)
let o := add(result, 0x20)
mstore(o, s)
mstore(add(o, n), 0)
mstore(0x40, add(result, 0x40))
}
}
/// @dev Returns the small string, with all bytes after the first null byte zeroized.
function normalizeSmallString(bytes32 s) internal pure returns (bytes32 result) {
/// @solidity memory-safe-assembly
assembly {
for {} byte(result, s) { result := add(result, 1) } {} // Scan for '\0'.
mstore(0x00, s)
mstore(result, 0x00)
result := mload(0x00)
}
}
/// @dev Returns the string as a normalized null-terminated small string.
function toSmallString(string memory s) internal pure returns (bytes32 result) {
/// @solidity memory-safe-assembly
assembly {
result := mload(s)
if iszero(lt(result, 33)) {
mstore(0x00, 0xec92f9a3) // `TooBigForSmallString()`.
revert(0x1c, 0x04)
}
result := shl(shl(3, sub(32, result)), mload(add(s, result)))
}
}
/// @dev Returns a lowercased copy of the string.
/// WARNING! This function is only compatible with 7-bit ASCII strings.
function lower(string memory subject) internal pure returns (string memory result) {
result = toCase(subject, false);
}
/// @dev Returns an UPPERCASED copy of the string.
/// WARNING! This function is only compatible with 7-bit ASCII strings.
function upper(string memory subject) internal pure returns (string memory result) {
result = toCase(subject, true);
}
/// @dev Escapes the string to be used within HTML tags.
function escapeHTML(string memory s) internal pure returns (string memory result) {
/// @solidity memory-safe-assembly
assembly {
let end := add(s, mload(s))
result := add(mload(0x40), 0x20)
// Store the bytes of the packed offsets and strides into the scratch space.
// `packed = (stride << 5) | offset`. Max offset is 20. Max stride is 6.
mstore(0x1f, 0x900094)
mstore(0x08, 0xc0000000a6ab)
// Store ""&'<>" into the scratch space.
mstore(0x00, shl(64, 0x2671756f743b26616d703b262333393b266c743b2667743b))
for {} iszero(eq(s, end)) {} {
s := add(s, 1)
let c := and(mload(s), 0xff)
// Not in `["\"","'","&","<",">"]`.
if iszero(and(shl(c, 1), 0x500000c400000000)) {
mstore8(result, c)
result := add(result, 1)
continue
}
let t := shr(248, mload(c))
mstore(result, mload(and(t, 0x1f)))
result := add(result, shr(5, t))
}
let last := result
mstore(last, 0) // Zeroize the slot after the string.
result := mload(0x40)
mstore(result, sub(last, add(result, 0x20))) // Store the length.
mstore(0x40, add(last, 0x20)) // Allocate the memory.
}
}
/// @dev Escapes the string to be used within double-quotes in a JSON.
/// If `addDoubleQuotes` is true, the result will be enclosed in double-quotes.
function escapeJSON(string memory s, bool addDoubleQuotes)
internal
pure
returns (string memory result)
{
/// @solidity memory-safe-assembly
assembly {
let end := add(s, mload(s))
result := add(mload(0x40), 0x20)
if addDoubleQuotes {
mstore8(result, 34)
result := add(1, result)
}
// Store "\\u0000" in scratch space.
// Store "0123456789abcdef" in scratch space.
// Also, store `{0x08:"b", 0x09:"t", 0x0a:"n", 0x0c:"f", 0x0d:"r"}`.
// into the scratch space.
mstore(0x15, 0x5c75303030303031323334353637383961626364656662746e006672)
// Bitmask for detecting `["\"","\\"]`.
let e := or(shl(0x22, 1), shl(0x5c, 1))
for {} iszero(eq(s, end)) {} {
s := add(s, 1)
let c := and(mload(s), 0xff)
if iszero(lt(c, 0x20)) {
if iszero(and(shl(c, 1), e)) {
// Not in `["\"","\\"]`.
mstore8(result, c)
result := add(result, 1)
continue
}
mstore8(result, 0x5c) // "\\".
mstore8(add(result, 1), c)
result := add(result, 2)
continue
}
if iszero(and(shl(c, 1), 0x3700)) {
// Not in `["\b","\t","\n","\f","\d"]`.
mstore8(0x1d, mload(shr(4, c))) // Hex value.
mstore8(0x1e, mload(and(c, 15))) // Hex value.
mstore(result, mload(0x19)) // "\\u00XX".
result := add(result, 6)
continue
}
mstore8(result, 0x5c) // "\\".
mstore8(add(result, 1), mload(add(c, 8)))
result := add(result, 2)
}
if addDoubleQuotes {
mstore8(result, 34)
result := add(1, result)
}
let last := result
mstore(last, 0) // Zeroize the slot after the string.
result := mload(0x40)
mstore(result, sub(last, add(result, 0x20))) // Store the length.
mstore(0x40, add(last, 0x20)) // Allocate the memory.
}
}
/// @dev Escapes the string to be used within double-quotes in a JSON.
function escapeJSON(string memory s) internal pure returns (string memory result) {
result = escapeJSON(s, false);
}
/// @dev Returns whether `a` equals `b`.
function eq(string memory a, string memory b) internal pure returns (bool result) {
/// @solidity memory-safe-assembly
assembly {
result := eq(keccak256(add(a, 0x20), mload(a)), keccak256(add(b, 0x20), mload(b)))
}
}
/// @dev Returns whether `a` equals `b`, where `b` is a null-terminated small string.
function eqs(string memory a, bytes32 b) internal pure returns (bool result) {
/// @solidity memory-safe-assembly
assembly {
// These should be evaluated on compile time, as far as possible.
let m := not(shl(7, div(not(iszero(b)), 255))) // `0x7f7f ...`.
let x := not(or(m, or(b, add(m, and(b, m)))))
let r := shl(7, iszero(iszero(shr(128, x))))
r := or(r, shl(6, iszero(iszero(shr(64, shr(r, x))))))
r := or(r, shl(5, lt(0xffffffff, shr(r, x))))
r := or(r, shl(4, lt(0xffff, shr(r, x))))
r := or(r, shl(3, lt(0xff, shr(r, x))))
// forgefmt: disable-next-item
result := gt(eq(mload(a), add(iszero(x), xor(31, shr(3, r)))),
xor(shr(add(8, r), b), shr(add(8, r), mload(add(a, 0x20)))))
}
}
/// @dev Packs a single string with its length into a single word.
/// Returns `bytes32(0)` if the length is zero or greater than 31.
function packOne(string memory a) internal pure returns (bytes32 result) {
/// @solidity memory-safe-assembly
assembly {
// We don't need to zero right pad the string,
// since this is our own custom non-standard packing scheme.
result :=
mul(
// Load the length and the bytes.
mload(add(a, 0x1f)),
// `length != 0 && length < 32`. Abuses underflow.
// Assumes that the length is valid and within the block gas limit.
lt(sub(mload(a), 1), 0x1f)
)
}
}
/// @dev Unpacks a string packed using {packOne}.
/// Returns the empty string if `packed` is `bytes32(0)`.
/// If `packed` is not an output of {packOne}, the output behavior is undefined.
function unpackOne(bytes32 packed) internal pure returns (string memory result) {
/// @solidity memory-safe-assembly
assembly {
// Grab the free memory pointer.
result := mload(0x40)
// Allocate 2 words (1 for the length, 1 for the bytes).
mstore(0x40, add(result, 0x40))
// Zeroize the length slot.
mstore(result, 0)
// Store the length and bytes.
mstore(add(result, 0x1f), packed)
// Right pad with zeroes.
mstore(add(add(result, 0x20), mload(result)), 0)
}
}
/// @dev Packs two strings with their lengths into a single word.
/// Returns `bytes32(0)` if combined length is zero or greater than 30.
function packTwo(string memory a, string memory b) internal pure returns (bytes32 result) {
/// @solidity memory-safe-assembly
assembly {
let aLength := mload(a)
// We don't need to zero right pad the strings,
// since this is our own custom non-standard packing scheme.
result :=
mul(
// Load the length and the bytes of `a` and `b`.
or(
shl(shl(3, sub(0x1f, aLength)), mload(add(a, aLength))),
mload(sub(add(b, 0x1e), aLength))
),
// `totalLength != 0 && totalLength < 31`. Abuses underflow.
// Assumes that the lengths are valid and within the block gas limit.
lt(sub(add(aLength, mload(b)), 1), 0x1e)
)
}
}
/// @dev Unpacks strings packed using {packTwo}.
/// Returns the empty strings if `packed` is `bytes32(0)`.
/// If `packed` is not an output of {packTwo}, the output behavior is undefined.
function unpackTwo(bytes32 packed)
internal
pure
returns (string memory resultA, string memory resultB)
{
/// @solidity memory-safe-assembly
assembly {
// Grab the free memory pointer.
resultA := mload(0x40)
resultB := add(resultA, 0x40)
// Allocate 2 words for each string (1 for the length, 1 for the byte). Total 4 words.
mstore(0x40, add(resultB, 0x40))
// Zeroize the length slots.
mstore(resultA, 0)
mstore(resultB, 0)
// Store the lengths and bytes.
mstore(add(resultA, 0x1f), packed)
mstore(add(resultB, 0x1f), mload(add(add(resultA, 0x20), mload(resultA))))
// Right pad with zeroes.
mstore(add(add(resultA, 0x20), mload(resultA)), 0)
mstore(add(add(resultB, 0x20), mload(resultB)), 0)
}
}
/// @dev Directly returns `a` without copying.
function directReturn(string memory a) internal pure {
assembly {
// Assumes that the string does not start from the scratch space.
let retStart := sub(a, 0x20)
let retSize := add(mload(a), 0x40)
// Right pad with zeroes. Just in case the string is produced
// by a method that doesn't zero right pad.
mstore(add(retStart, retSize), 0)
// Store the return offset.
mstore(retStart, 0x20)
// End the transaction, returning the string.
return(retStart, retSize)
}
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
/// @notice Safe ETH and ERC20 transfer library that gracefully handles missing return values.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/SafeTransferLib.sol)
/// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/SafeTransferLib.sol)
///
/// @dev Note:
/// - For ETH transfers, please use `forceSafeTransferETH` for DoS protection.
/// - For ERC20s, this implementation won't check that a token has code,
/// responsibility is delegated to the caller.
library SafeTransferLib {
/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
/* CUSTOM ERRORS */
/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
/// @dev The ETH transfer has failed.
error ETHTransferFailed();
/// @dev The ERC20 `transferFrom` has failed.
error TransferFromFailed();
/// @dev The ERC20 `transfer` has failed.
error TransferFailed();
/// @dev The ERC20 `approve` has failed.
error ApproveFailed();
/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
/* CONSTANTS */
/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
/// @dev Suggested gas stipend for contract receiving ETH that disallows any storage writes.
uint256 internal constant GAS_STIPEND_NO_STORAGE_WRITES = 2300;
/// @dev Suggested gas stipend for contract receiving ETH to perform a few
/// storage reads and writes, but low enough to prevent griefing.
uint256 internal constant GAS_STIPEND_NO_GRIEF = 100000;
/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
/* ETH OPERATIONS */
/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
// If the ETH transfer MUST succeed with a reasonable gas budget, use the force variants.
//
// The regular variants:
// - Forwards all remaining gas to the target.
// - Reverts if the target reverts.
// - Reverts if the current contract has insufficient balance.
//
// The force variants:
// - Forwards with an optional gas stipend
// (defaults to `GAS_STIPEND_NO_GRIEF`, which is sufficient for most cases).
// - If the target reverts, or if the gas stipend is exhausted,
// creates a temporary contract to force send the ETH via `SELFDESTRUCT`.
// Future compatible with `SENDALL`: https://eips.ethereum.org/EIPS/eip-4758.
// - Reverts if the current contract has insufficient balance.
//
// The try variants:
// - Forwards with a mandatory gas stipend.
// - Instead of reverting, returns whether the transfer succeeded.
/// @dev Sends `amount` (in wei) ETH to `to`.
function safeTransferETH(address to, uint256 amount) internal {
/// @solidity memory-safe-assembly
assembly {
if iszero(call(gas(), to, amount, codesize(), 0x00, codesize(), 0x00)) {
mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`.
revert(0x1c, 0x04)
}
}
}
/// @dev Sends all the ETH in the current contract to `to`.
function safeTransferAllETH(address to) internal {
/// @solidity memory-safe-assembly
assembly {
// Transfer all the ETH and check if it succeeded or not.
if iszero(call(gas(), to, selfbalance(), codesize(), 0x00, codesize(), 0x00)) {
mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`.
revert(0x1c, 0x04)
}
}
}
/// @dev Force sends `amount` (in wei) ETH to `to`, with a `gasStipend`.
function forceSafeTransferETH(address to, uint256 amount, uint256 gasStipend) internal {
/// @solidity memory-safe-assembly
assembly {
if lt(selfbalance(), amount) {
mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`.
revert(0x1c, 0x04)
}
if iszero(call(gasStipend, to, amount, codesize(), 0x00, codesize(), 0x00)) {
mstore(0x00, to) // Store the address in scratch space.
mstore8(0x0b, 0x73) // Opcode `PUSH20`.
mstore8(0x20, 0xff) // Opcode `SELFDESTRUCT`.
if iszero(create(amount, 0x0b, 0x16)) { revert(codesize(), codesize()) } // For gas estimation.
}
}
}
/// @dev Force sends all the ETH in the current contract to `to`, with a `gasStipend`.
function forceSafeTransferAllETH(address to, uint256 gasStipend) internal {
/// @solidity memory-safe-assembly
assembly {
if iszero(call(gasStipend, to, selfbalance(), codesize(), 0x00, codesize(), 0x00)) {
mstore(0x00, to) // Store the address in scratch space.
mstore8(0x0b, 0x73) // Opcode `PUSH20`.
mstore8(0x20, 0xff) // Opcode `SELFDESTRUCT`.
if iszero(create(selfbalance(), 0x0b, 0x16)) { revert(codesize(), codesize()) } // For gas estimation.
}
}
}
/// @dev Force sends `amount` (in wei) ETH to `to`, with `GAS_STIPEND_NO_GRIEF`.
function forceSafeTransferETH(address to, uint256 amount) internal {
/// @solidity memory-safe-assembly
assembly {
if lt(selfbalance(), amount) {
mstore(0x00, 0xb12d13eb) // `ETHTransferFailed()`.
revert(0x1c, 0x04)
}
if iszero(call(GAS_STIPEND_NO_GRIEF, to, amount, codesize(), 0x00, codesize(), 0x00)) {
mstore(0x00, to) // Store the address in scratch space.
mstore8(0x0b, 0x73) // Opcode `PUSH20`.
mstore8(0x20, 0xff) // Opcode `SELFDESTRUCT`.
if iszero(create(amount, 0x0b, 0x16)) { revert(codesize(), codesize()) } // For gas estimation.
}
}
}
/// @dev Force sends all the ETH in the current contract to `to`, with `GAS_STIPEND_NO_GRIEF`.
function forceSafeTransferAllETH(address to) internal {
/// @solidity memory-safe-assembly
assembly {
// forgefmt: disable-next-item
if iszero(call(GAS_STIPEND_NO_GRIEF, to, selfbalance(), codesize(), 0x00, codesize(), 0x00)) {
mstore(0x00, to) // Store the address in scratch space.
mstore8(0x0b, 0x73) // Opcode `PUSH20`.
mstore8(0x20, 0xff) // Opcode `SELFDESTRUCT`.
if iszero(create(selfbalance(), 0x0b, 0x16)) { revert(codesize(), codesize()) } // For gas estimation.
}
}
}
/// @dev Sends `amount` (in wei) ETH to `to`, with a `gasStipend`.
function trySafeTransferETH(address to, uint256 amount, uint256 gasStipend)
internal
returns (bool success)
{
/// @solidity memory-safe-assembly
assembly {
success := call(gasStipend, to, amount, codesize(), 0x00, codesize(), 0x00)
}
}
/// @dev Sends all the ETH in the current contract to `to`, with a `gasStipend`.
function trySafeTransferAllETH(address to, uint256 gasStipend)
internal
returns (bool success)
{
/// @solidity memory-safe-assembly
assembly {
success := call(gasStipend, to, selfbalance(), codesize(), 0x00, codesize(), 0x00)
}
}
/*´:°•.°+.*•´.*:˚.°*.˚•´.°:°•.°•.*•´.*:˚.°*.˚•´.°:°•.°+.*•´.*:*/
/* ERC20 OPERATIONS */
/*.•°:°.´+˚.*°.˚:*.´•*.+°.•°:´*.´•*.•°.•°:°.´:•˚°.*°.˚:*.´+°.•*/
/// @dev Sends `amount` of ERC20 `token` from `from` to `to`.
/// Reverts upon failure.
///
/// The `from` account must have at least `amount` approved for
/// the current contract to manage.
function safeTransferFrom(address token, address from, address to, uint256 amount) internal {
/// @solidity memory-safe-assembly
assembly {
let m := mload(0x40) // Cache the free memory pointer.
mstore(0x60, amount) // Store the `amount` argument.
mstore(0x40, to) // Store the `to` argument.
mstore(0x2c, shl(96, from)) // Store the `from` argument.
mstore(0x0c, 0x23b872dd000000000000000000000000) // `transferFrom(address,address,uint256)`.
// Perform the transfer, reverting upon failure.
if iszero(
and( // The arguments of `and` are evaluated from right to left.
or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
call(gas(), token, 0, 0x1c, 0x64, 0x00, 0x20)
)
) {
mstore(0x00, 0x7939f424) // `TransferFromFailed()`.
revert(0x1c, 0x04)
}
mstore(0x60, 0) // Restore the zero slot to zero.
mstore(0x40, m) // Restore the free memory pointer.
}
}
/// @dev Sends all of ERC20 `token` from `from` to `to`.
/// Reverts upon failure.
///
/// The `from` account must have their entire balance approved for
/// the current contract to manage.
function safeTransferAllFrom(address token, address from, address to)
internal
returns (uint256 amount)
{
/// @solidity memory-safe-assembly
assembly {
let m := mload(0x40) // Cache the free memory pointer.
mstore(0x40, to) // Store the `to` argument.
mstore(0x2c, shl(96, from)) // Store the `from` argument.
mstore(0x0c, 0x70a08231000000000000000000000000) // `balanceOf(address)`.
// Read the balance, reverting upon failure.
if iszero(
and( // The arguments of `and` are evaluated from right to left.
gt(returndatasize(), 0x1f), // At least 32 bytes returned.
staticcall(gas(), token, 0x1c, 0x24, 0x60, 0x20)
)
) {
mstore(0x00, 0x7939f424) // `TransferFromFailed()`.
revert(0x1c, 0x04)
}
mstore(0x00, 0x23b872dd) // `transferFrom(address,address,uint256)`.
amount := mload(0x60) // The `amount` is already at 0x60. We'll need to return it.
// Perform the transfer, reverting upon failure.
if iszero(
and( // The arguments of `and` are evaluated from right to left.
or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
call(gas(), token, 0, 0x1c, 0x64, 0x00, 0x20)
)
) {
mstore(0x00, 0x7939f424) // `TransferFromFailed()`.
revert(0x1c, 0x04)
}
mstore(0x60, 0) // Restore the zero slot to zero.
mstore(0x40, m) // Restore the free memory pointer.
}
}
/// @dev Sends `amount` of ERC20 `token` from the current contract to `to`.
/// Reverts upon failure.
function safeTransfer(address token, address to, uint256 amount) internal {
/// @solidity memory-safe-assembly
assembly {
mstore(0x14, to) // Store the `to` argument.
mstore(0x34, amount) // Store the `amount` argument.
mstore(0x00, 0xa9059cbb000000000000000000000000) // `transfer(address,uint256)`.
// Perform the transfer, reverting upon failure.
if iszero(
and( // The arguments of `and` are evaluated from right to left.
or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
)
) {
mstore(0x00, 0x90b8ec18) // `TransferFailed()`.
revert(0x1c, 0x04)
}
mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten.
}
}
/// @dev Sends all of ERC20 `token` from the current contract to `to`.
/// Reverts upon failure.
function safeTransferAll(address token, address to) internal returns (uint256 amount) {
/// @solidity memory-safe-assembly
assembly {
mstore(0x00, 0x70a08231) // Store the function selector of `balanceOf(address)`.
mstore(0x20, address()) // Store the address of the current contract.
// Read the balance, reverting upon failure.
if iszero(
and( // The arguments of `and` are evaluated from right to left.
gt(returndatasize(), 0x1f), // At least 32 bytes returned.
staticcall(gas(), token, 0x1c, 0x24, 0x34, 0x20)
)
) {
mstore(0x00, 0x90b8ec18) // `TransferFailed()`.
revert(0x1c, 0x04)
}
mstore(0x14, to) // Store the `to` argument.
amount := mload(0x34) // The `amount` is already at 0x34. We'll need to return it.
mstore(0x00, 0xa9059cbb000000000000000000000000) // `transfer(address,uint256)`.
// Perform the transfer, reverting upon failure.
if iszero(
and( // The arguments of `and` are evaluated from right to left.
or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
)
) {
mstore(0x00, 0x90b8ec18) // `TransferFailed()`.
revert(0x1c, 0x04)
}
mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten.
}
}
/// @dev Sets `amount` of ERC20 `token` for `to` to manage on behalf of the current contract.
/// Reverts upon failure.
function safeApprove(address token, address to, uint256 amount) internal {
/// @solidity memory-safe-assembly
assembly {
mstore(0x14, to) // Store the `to` argument.
mstore(0x34, amount) // Store the `amount` argument.
mstore(0x00, 0x095ea7b3000000000000000000000000) // `approve(address,uint256)`.
// Perform the approval, reverting upon failure.
if iszero(
and( // The arguments of `and` are evaluated from right to left.
or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
)
) {
mstore(0x00, 0x3e3f8f73) // `ApproveFailed()`.
revert(0x1c, 0x04)
}
mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten.
}
}
/// @dev Sets `amount` of ERC20 `token` for `to` to manage on behalf of the current contract.
/// If the initial attempt to approve fails, attempts to reset the approved amount to zero,
/// then retries the approval again (some tokens, e.g. USDT, requires this).
/// Reverts upon failure.
function safeApproveWithRetry(address token, address to, uint256 amount) internal {
/// @solidity memory-safe-assembly
assembly {
mstore(0x14, to) // Store the `to` argument.
mstore(0x34, amount) // Store the `amount` argument.
mstore(0x00, 0x095ea7b3000000000000000000000000) // `approve(address,uint256)`.
// Perform the approval, retrying upon failure.
if iszero(
and( // The arguments of `and` are evaluated from right to left.
or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
)
) {
mstore(0x34, 0) // Store 0 for the `amount`.
mstore(0x00, 0x095ea7b3000000000000000000000000) // `approve(address,uint256)`.
pop(call(gas(), token, 0, 0x10, 0x44, codesize(), 0x00)) // Reset the approval.
mstore(0x34, amount) // Store back the original `amount`.
// Retry the approval, reverting upon failure.
if iszero(
and(
or(eq(mload(0x00), 1), iszero(returndatasize())), // Returned 1 or nothing.
call(gas(), token, 0, 0x10, 0x44, 0x00, 0x20)
)
) {
mstore(0x00, 0x3e3f8f73) // `ApproveFailed()`.
revert(0x1c, 0x04)
}
}
mstore(0x34, 0) // Restore the part of the free memory pointer that was overwritten.
}
}
/// @dev Returns the amount of ERC20 `token` owned by `account`.
/// Returns zero if the `token` does not exist.
function balanceOf(address token, address account) internal view returns (uint256 amount) {
/// @solidity memory-safe-assembly
assembly {
mstore(0x14, account) // Store the `account` argument.
mstore(0x00, 0x70a08231000000000000000000000000) // `balanceOf(address)`.
amount :=
mul(
mload(0x20),
and( // The arguments of `and` are evaluated from right to left.
gt(returndatasize(), 0x1f), // At least 32 bytes returned.
staticcall(gas(), token, 0x10, 0x24, 0x20, 0x20)
)
)
}
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
/// @title DN404
/// @notice DN404 is a hybrid ERC20 and ERC721 implementation that mints
/// and burns NFTs based on an account's ERC20 token balance.
///
/// @author vectorized.eth (@optimizoor)
/// @author Quit (@0xQuit)
/// @author Michael Amadi (@AmadiMichaels)
/// @author cygaar (@0xCygaar)
/// @author Thomas (@0xjustadev)
/// @author Harrison (@PopPunkOnChain)
///
/// @dev Note:
/// - The ERC721 data is stored in this base DN404 contract, however a
/// DN404Mirror contract ***MUST*** be deployed and linked during
/// initialization.
abstract contract DN404 {
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* EVENTS */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Emitted when `amount` tokens is transferred from `from` to `to`.
event Transfer(address indexed from, address indexed to, uint256 amount);
/// @dev Emitted when `amount` tokens is approved by `owner` to be used by `spender`.
event Approval(address indexed owner, address indexed spender, uint256 amount);
/// @dev Emitted when `target` sets their skipNFT flag to `status`.
event SkipNFTSet(address indexed target, bool status);
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* CUSTOM ERRORS */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Thrown when the tokensPerNft is set to zero.
error ZeroTokensPerNft();
/// @dev Thrown when attempting to double-initialize the contract.
error DNAlreadyInitialized();
/// @dev Thrown when attempting to transfer or burn more tokens than sender's balance.
error InsufficientBalance();
/// @dev Thrown when a spender attempts to transfer tokens with an insufficient allowance.
error InsufficientAllowance();
/// @dev Thrown when minting an amount of tokens that would overflow the max tokens.
error TotalSupplyOverflow();
/// @dev Thrown when the caller for a fallback NFT function is not the mirror contract.
error SenderNotMirror();
/// @dev Thrown when attempting to transfer tokens to the zero address.
error TransferToZeroAddress();
/// @dev Thrown when the mirror address provided for initialization is the zero address.
error MirrorAddressIsZero();
/// @dev Thrown when the link call to the mirror contract reverts.
error LinkMirrorContractFailed();
/// @dev Thrown when setting an NFT token approval
/// and the caller is not the owner or an approved operator.
error ApprovalCallerNotOwnerNorApproved();
/// @dev Thrown when transferring an NFT
/// and the caller is not the owner or an approved operator.
error TransferCallerNotOwnerNorApproved();
/// @dev Thrown when transferring an NFT and the from address is not the current owner.
error TransferFromIncorrectOwner();
/// @dev Thrown when checking the owner or approved address for an non-existent NFT.
error TokenDoesNotExist();
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* CONSTANTS */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Amount of token balance that is equal to one NFT.
/// @notice This is extended in this fork so that it is multiplied by tokensPerNft.
/// This lets you have 18 decimals and multiple full tokens per NFT.
uint256 internal immutable _WAD = 10 ** 18;
/// @dev The maximum token ID allowed for an NFT.
uint256 internal constant _MAX_TOKEN_ID = 0xffffffff;
/// @dev The maximum possible token supply.
uint256 internal constant _MAX_SUPPLY = 10 ** 18 * 0xffffffff - 1;
/// @dev The flag to denote that the address data is initialized.
uint8 internal constant _ADDRESS_DATA_INITIALIZED_FLAG = 1 << 0;
/// @dev The flag to denote that the address should skip NFTs.
uint8 internal constant _ADDRESS_DATA_SKIP_NFT_FLAG = 1 << 1;
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* STORAGE */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Struct containing an address's token data and settings.
struct AddressData {
// Auxiliary data.
uint88 aux;
// Flags for `initialized` and `skipNFT`.
uint8 flags;
// The alias for the address. Zero means absence of an alias.
uint32 addressAlias;
// The number of NFT tokens.
uint32 ownedLength;
// The token balance in wei.
uint96 balance;
}
/// @dev A uint32 map in storage.
struct Uint32Map {
mapping(uint256 => uint256) map;
}
/// @dev Struct containing the base token contract storage.
struct DN404Storage {
// Current number of address aliases assigned.
uint32 numAliases;
// Next token ID to assign for an NFT mint.
uint32 nextTokenId;
// Number of ERC20 tokens required to mint an NFT.
uint96 tokensPerNft;
// Total supply of minted NFTs.
uint32 totalNFTSupply;
// Total supply of tokens.
uint96 totalSupply;
// Address of the NFT mirror contract.
address mirrorERC721;
// Mapping of a user alias number to their address.
mapping(uint32 => address) aliasToAddress;
// Mapping of user operator approvals for NFTs.
mapping(address => mapping(address => bool)) operatorApprovals;
// Mapping of NFT token approvals to approved operators.
mapping(uint256 => address) tokenApprovals;
// Mapping of user allowances for token spenders.
mapping(address => mapping(address => uint256)) allowance;
// Mapping of NFT token IDs owned by an address.
mapping(address => Uint32Map) owned;
// Even indices: owner aliases. Odd indices: owned indices.
Uint32Map oo;
// Mapping of user account AddressData
mapping(address => AddressData) addressData;
}
/// @dev Returns a storage pointer for DN404Storage.
function _getDN404Storage() internal pure virtual returns (DN404Storage storage $) {
/// @solidity memory-safe-assembly
assembly {
// `uint72(bytes9(keccak256("DN404_STORAGE")))`.
$.slot := 0xa20d6e21d0e5255308 // Truncate to 9 bytes to reduce bytecode size.
}
}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* INITIALIZER */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Initializes the DN404 contract with an
/// `initialTokenSupply`, `initialTokenOwner` and `mirror` NFT contract address.
function _initializeDN404(
uint256 initialTokenSupply,
address initialSupplyOwner,
address mirror,
uint96 tokensPerNft
) internal virtual {
DN404Storage storage $ = _getDN404Storage();
if ($.nextTokenId != 0) revert DNAlreadyInitialized();
if (mirror == address(0)) revert MirrorAddressIsZero();
_linkMirrorContract(mirror);
$.nextTokenId = 1;
$.mirrorERC721 = mirror;
if (tokensPerNft == 0) revert ZeroTokensPerNft();
$.tokensPerNft = tokensPerNft;
if (initialTokenSupply > 0) {
if (initialSupplyOwner == address(0)) revert TransferToZeroAddress();
if (initialTokenSupply > _MAX_SUPPLY) revert TotalSupplyOverflow();
$.totalSupply = uint96(initialTokenSupply);
AddressData storage initialOwnerAddressData = _addressData(initialSupplyOwner);
initialOwnerAddressData.balance = uint96(initialTokenSupply);
emit Transfer(address(0), initialSupplyOwner, initialTokenSupply);
_setSkipNFT(initialSupplyOwner, true);
}
}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* METADATA FUNCTIONS TO OVERRIDE */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Returns the name of the token.
function name() public view virtual returns (string memory);
/// @dev Returns the symbol of the token.
function symbol() public view virtual returns (string memory);
/// @dev Returns the Uniform Resource Identifier (URI) for token `id`.
function tokenURI(uint256 id) public view virtual returns (string memory);
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* ERC20 OPERATIONS */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Returns the decimals places of the token. Always 18.
function decimals() public pure returns (uint8) {
return 18;
}
/// @dev Returns the amount of tokens in existence.
function totalSupply() public view virtual returns (uint256) {
return uint256(_getDN404Storage().totalSupply);
}
/// @dev Returns the amount of tokens owned by `owner`.
function balanceOf(address owner) public view virtual returns (uint256) {
return _getDN404Storage().addressData[owner].balance;
}
/// @dev Returns the amount of tokens that `spender` can spend on behalf of `owner`.
function allowance(address owner, address spender) public view returns (uint256) {
return _getDN404Storage().allowance[owner][spender];
}
/// @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
///
/// Emits a {Approval} event.
function approve(address spender, uint256 amount) public virtual returns (bool) {
DN404Storage storage $ = _getDN404Storage();
$.allowance[msg.sender][spender] = amount;
emit Approval(msg.sender, spender, amount);
return true;
}
/// @dev Transfer `amount` tokens from the caller to `to`.
///
/// Will burn sender NFTs if balance after transfer is less than
/// the amount required to support the current NFT balance.
///
/// Will mint NFTs to `to` if the recipient's new balance supports
/// additional NFTs ***AND*** the `to` address's skipNFT flag is
/// set to false.
///
/// Requirements:
/// - `from` must at least have `amount`.
///
/// Emits a {Transfer} event.
function transfer(address to, uint256 amount) public virtual returns (bool) {
_transfer(msg.sender, to, amount);
return true;
}
/// @dev Transfers `amount` tokens from `from` to `to`.
///
/// Note: Does not update the allowance if it is the maximum uint256 value.
///
/// Will burn sender NFTs if balance after transfer is less than
/// the amount required to support the current NFT balance.
///
/// Will mint NFTs to `to` if the recipient's new balance supports
/// additional NFTs ***AND*** the `to` address's skipNFT flag is
/// set to false.
///
/// Requirements:
/// - `from` must at least have `amount`.
/// - The caller must have at least `amount` of allowance to transfer the tokens of `from`.
///
/// Emits a {Transfer} event.
function transferFrom(address from, address to, uint256 amount) public virtual returns (bool) {
DN404Storage storage $ = _getDN404Storage();
uint256 allowed = $.allowance[from][msg.sender];
if (allowed != type(uint256).max) {
if (amount > allowed) revert InsufficientAllowance();
unchecked {
$.allowance[from][msg.sender] = allowed - amount;
}
}
_transfer(from, to, amount);
return true;
}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* INTERNAL MINT FUNCTIONS */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Mints `amount` tokens to `to`, increasing the total supply.
///
/// Will mint NFTs to `to` if the recipient's new balance supports
/// additional NFTs ***AND*** the `to` address's skipNFT flag is
/// set to false.
///
/// Emits a {Transfer} event.
function _mint(address to, uint256 amount) internal virtual {
if (to == address(0)) revert TransferToZeroAddress();
DN404Storage storage $ = _getDN404Storage();
AddressData storage toAddressData = _addressData(to);
unchecked {
uint256 currentTokenSupply = uint256($.totalSupply) + amount;
if (amount > _MAX_SUPPLY || currentTokenSupply > _MAX_SUPPLY) {
revert TotalSupplyOverflow();
}
$.totalSupply = uint96(currentTokenSupply);
uint256 toBalance = toAddressData.balance + amount;
toAddressData.balance = uint96(toBalance);
if (toAddressData.flags & _ADDRESS_DATA_SKIP_NFT_FLAG == 0) {
Uint32Map storage toOwned = $.owned[to];
uint256 toIndex = toAddressData.ownedLength;
uint256 toEnd = toBalance / ($.tokensPerNft * _WAD);
_PackedLogs memory packedLogs = _packedLogsMalloc(_zeroFloorSub(toEnd, toIndex));
if (packedLogs.logs.length != 0) {
uint256 maxNFTId = currentTokenSupply / ($.tokensPerNft * _WAD);
uint32 toAlias = _registerAndResolveAlias(toAddressData, to);
uint256 id = $.nextTokenId;
$.totalNFTSupply += uint32(packedLogs.logs.length);
toAddressData.ownedLength = uint32(toEnd);
// Mint loop.
do {
while (_get($.oo, _ownershipIndex(id)) != 0) {
if (++id > maxNFTId) id = 1;
}
_set(toOwned, toIndex, uint32(id));
_setOwnerAliasAndOwnedIndex($.oo, id, toAlias, uint32(toIndex++));
_packedLogsAppend(packedLogs, to, id, 0);
if (++id > maxNFTId) id = 1;
} while (toIndex != toEnd);
$.nextTokenId = uint32(id);
_packedLogsSend(packedLogs, $.mirrorERC721);
}
}
}
emit Transfer(address(0), to, amount);
}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* INTERNAL BURN FUNCTIONS */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Burns `amount` tokens from `from`, reducing the total supply.
///
/// Will burn sender NFTs if balance after transfer is less than
/// the amount required to support the current NFT balance.
///
/// Emits a {Transfer} event.
function _burn(address from, uint256 amount) internal virtual {
DN404Storage storage $ = _getDN404Storage();
AddressData storage fromAddressData = _addressData(from);
uint256 fromBalance = fromAddressData.balance;
if (amount > fromBalance) revert InsufficientBalance();
uint256 currentTokenSupply = $.totalSupply;
unchecked {
fromBalance -= amount;
fromAddressData.balance = uint96(fromBalance);
currentTokenSupply -= amount;
$.totalSupply = uint96(currentTokenSupply);
Uint32Map storage fromOwned = $.owned[from];
uint256 fromIndex = fromAddressData.ownedLength;
uint256 nftAmountToBurn =
_zeroFloorSub(fromIndex, fromBalance / ($.tokensPerNft * _WAD));
if (nftAmountToBurn != 0) {
$.totalNFTSupply -= uint32(nftAmountToBurn);
_PackedLogs memory packedLogs = _packedLogsMalloc(nftAmountToBurn);
uint256 fromEnd = fromIndex - nftAmountToBurn;
// Burn loop.
do {
uint256 id = _get(fromOwned, --fromIndex);
_setOwnerAliasAndOwnedIndex($.oo, id, 0, 0);
delete $.tokenApprovals[id];
_packedLogsAppend(packedLogs, from, id, 1);
} while (fromIndex != fromEnd);
fromAddressData.ownedLength = uint32(fromIndex);
_packedLogsSend(packedLogs, $.mirrorERC721);
}
}
emit Transfer(from, address(0), amount);
}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* INTERNAL TRANSFER FUNCTIONS */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Moves `amount` of tokens from `from` to `to`.
///
/// Will burn sender NFTs if balance after transfer is less than
/// the amount required to support the current NFT balance.
///
/// Will mint NFTs to `to` if the recipient's new balance supports
/// additional NFTs ***AND*** the `to` address's skipNFT flag is
/// set to false.
///
/// Emits a {Transfer} event.
function _transfer(address from, address to, uint256 amount) internal virtual {
if (to == address(0)) revert TransferToZeroAddress();
DN404Storage storage $ = _getDN404Storage();
AddressData storage fromAddressData = _addressData(from);
AddressData storage toAddressData = _addressData(to);
_TransferTemps memory t;
t.fromOwnedLength = fromAddressData.ownedLength;
t.toOwnedLength = toAddressData.ownedLength;
t.fromBalance = fromAddressData.balance;
if (amount > t.fromBalance) revert InsufficientBalance();
unchecked {
t.fromBalance -= amount;
fromAddressData.balance = uint96(t.fromBalance);
toAddressData.balance = uint96(t.toBalance = toAddressData.balance + amount);
t.nftAmountToBurn =
_zeroFloorSub(t.fromOwnedLength, t.fromBalance / ($.tokensPerNft * _WAD));
if (toAddressData.flags & _ADDRESS_DATA_SKIP_NFT_FLAG == 0) {
if (from == to) t.toOwnedLength = t.fromOwnedLength - t.nftAmountToBurn;
t.nftAmountToMint =
_zeroFloorSub(t.toBalance / ($.tokensPerNft * _WAD), t.toOwnedLength);
}
_PackedLogs memory packedLogs = _packedLogsMalloc(t.nftAmountToBurn + t.nftAmountToMint);
if (t.nftAmountToBurn != 0) {
Uint32Map storage fromOwned = $.owned[from];
uint256 fromIndex = t.fromOwnedLength;
uint256 fromEnd = fromIndex - t.nftAmountToBurn;
$.totalNFTSupply -= uint32(t.nftAmountToBurn);
fromAddressData.ownedLength = uint32(fromEnd);
// Burn loop.
do {
uint256 id = _get(fromOwned, --fromIndex);
_setOwnerAliasAndOwnedIndex($.oo, id, 0, 0);
delete $.tokenApprovals[id];
_packedLogsAppend(packedLogs, from, id, 1);
} while (fromIndex != fromEnd);
}
if (t.nftAmountToMint != 0) {
Uint32Map storage toOwned = $.owned[to];
uint256 toIndex = t.toOwnedLength;
uint256 toEnd = toIndex + t.nftAmountToMint;
uint32 toAlias = _registerAndResolveAlias(toAddressData, to);
uint256 maxNFTId = $.totalSupply / ($.tokensPerNft * _WAD);
uint256 id = $.nextTokenId;
$.totalNFTSupply += uint32(t.nftAmountToMint);
toAddressData.ownedLength = uint32(toEnd);
// Mint loop.
do {
while (_get($.oo, _ownershipIndex(id)) != 0) {
if (++id > maxNFTId) id = 1;
}
_set(toOwned, toIndex, uint32(id));
_setOwnerAliasAndOwnedIndex($.oo, id, toAlias, uint32(toIndex++));
_packedLogsAppend(packedLogs, to, id, 0);
if (++id > maxNFTId) id = 1;
} while (toIndex != toEnd);
$.nextTokenId = uint32(id);
}
if (packedLogs.logs.length != 0) {
_packedLogsSend(packedLogs, $.mirrorERC721);
}
}
emit Transfer(from, to, amount);
}
/// @dev Transfers token `id` from `from` to `to`.
///
/// Requirements:
///
/// - Call must originate from the mirror contract.
/// - Token `id` must exist.
/// - `from` must be the owner of the token.
/// - `to` cannot be the zero address.
/// `msgSender` must be the owner of the token, or be approved to manage the token.
///
/// Emits a {Transfer} event.
function _transferFromNFT(address from, address to, uint256 id, address msgSender)
internal
virtual
{
DN404Storage storage $ = _getDN404Storage();
if (to == address(0)) revert TransferToZeroAddress();
address owner = $.aliasToAddress[_get($.oo, _ownershipIndex(id))];
if (from != owner) revert TransferFromIncorrectOwner();
if (msgSender != from) {
if (!$.operatorApprovals[from][msgSender]) {
if (msgSender != $.tokenApprovals[id]) {
revert TransferCallerNotOwnerNorApproved();
}
}
}
AddressData storage fromAddressData = _addressData(from);
AddressData storage toAddressData = _addressData(to);
fromAddressData.balance -= uint96($.tokensPerNft * _WAD);
unchecked {
toAddressData.balance += uint96($.tokensPerNft * _WAD);
_set($.oo, _ownershipIndex(id), _registerAndResolveAlias(toAddressData, to));
delete $.tokenApprovals[id];
uint256 updatedId = _get($.owned[from], --fromAddressData.ownedLength);
_set($.owned[from], _get($.oo, _ownedIndex(id)), uint32(updatedId));
uint256 n = toAddressData.ownedLength++;
_set($.oo, _ownedIndex(updatedId), _get($.oo, _ownedIndex(id)));
_set($.owned[to], n, uint32(id));
_set($.oo, _ownedIndex(id), uint32(n));
}
emit Transfer(from, to, $.tokensPerNft * _WAD);
}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* DATA HITCHHIKING FUNCTIONS */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Returns the auxiliary data for `owner`.
/// Minting, transferring, burning the tokens of `owner` will not change the auxiliary data.
/// Auxiliary data can be set for any address, even if it does not have any tokens.
function _getAux(address owner) internal view virtual returns (uint88) {
return _getDN404Storage().addressData[owner].aux;
}
/// @dev Set the auxiliary data for `owner` to `value`.
/// Minting, transferring, burning the tokens of `owner` will not change the auxiliary data.
/// Auxiliary data can be set for any address, even if it does not have any tokens.
function _setAux(address owner, uint88 value) internal virtual {
_getDN404Storage().addressData[owner].aux = value;
}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* SKIP NFT FUNCTIONS */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Returns true if account `a` will skip NFT minting on token mints and transfers.
/// Returns false if account `a` will mint NFTs on token mints and transfers.
function getSkipNFT(address a) public view virtual returns (bool) {
AddressData storage d = _getDN404Storage().addressData[a];
if (d.flags & _ADDRESS_DATA_INITIALIZED_FLAG == 0) return _hasCode(a);
return d.flags & _ADDRESS_DATA_SKIP_NFT_FLAG != 0;
}
/// @dev Sets the caller's skipNFT flag to `skipNFT`
///
/// Emits a {SkipNFTSet} event.
function setSkipNFT(bool skipNFT) public virtual {
_setSkipNFT(msg.sender, skipNFT);
}
/// @dev Internal function to set account `a` skipNFT flag to `state`
///
/// Initializes account `a` AddressData if it is not currently initialized.
///
/// Emits a {SkipNFTSet} event.
function _setSkipNFT(address a, bool state) internal virtual {
AddressData storage d = _addressData(a);
if ((d.flags & _ADDRESS_DATA_SKIP_NFT_FLAG != 0) != state) {
d.flags ^= _ADDRESS_DATA_SKIP_NFT_FLAG;
}
emit SkipNFTSet(a, state);
}
/// @dev Returns a storage data pointer for account `a` AddressData
///
/// Initializes account `a` AddressData if it is not currently initialized.
function _addressData(address a) internal virtual returns (AddressData storage d) {
DN404Storage storage $ = _getDN404Storage();
d = $.addressData[a];
if (d.flags & _ADDRESS_DATA_INITIALIZED_FLAG == 0) {
uint8 flags = _ADDRESS_DATA_INITIALIZED_FLAG;
if (_hasCode(a)) flags |= _ADDRESS_DATA_SKIP_NFT_FLAG;
d.flags = flags;
}
}
/// @dev Returns the `addressAlias` of account `to`.
///
/// Assigns and registers the next alias if `to` alias was not previously registered.
function _registerAndResolveAlias(AddressData storage toAddressData, address to)
internal
virtual
returns (uint32 addressAlias)
{
DN404Storage storage $ = _getDN404Storage();
addressAlias = toAddressData.addressAlias;
if (addressAlias == 0) {
addressAlias = ++$.numAliases;
toAddressData.addressAlias = addressAlias;
$.aliasToAddress[addressAlias] = to;
}
}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* MIRROR OPERATIONS */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Returns the address of the mirror NFT contract.
function mirrorERC721() public view virtual returns (address) {
return _getDN404Storage().mirrorERC721;
}
/// @dev Returns the total NFT supply.
function _totalNFTSupply() internal view virtual returns (uint256) {
return _getDN404Storage().totalNFTSupply;
}
/// @dev Returns `owner` NFT balance.
function _balanceOfNFT(address owner) internal view virtual returns (uint256) {
return _getDN404Storage().addressData[owner].ownedLength;
}
/// @dev Returns the owner of token `id`.
/// Returns the zero address instead of reverting if the token does not exist.
function _ownerAt(uint256 id) internal view virtual returns (address) {
DN404Storage storage $ = _getDN404Storage();
return $.aliasToAddress[_get($.oo, _ownershipIndex(id))];
}
/// @dev Returns the owner of token `id`.
///
/// Requirements:
/// - Token `id` must exist.
function _ownerOf(uint256 id) internal view virtual returns (address) {
if (!_exists(id)) revert TokenDoesNotExist();
return _ownerAt(id);
}
/// @dev Returns if token `id` exists.
function _exists(uint256 id) internal view virtual returns (bool) {
return _ownerAt(id) != address(0);
}
/// @dev Returns the account approved to manage token `id`.
///
/// Requirements:
/// - Token `id` must exist.
function _getApproved(uint256 id) internal view virtual returns (address) {
if (!_exists(id)) revert TokenDoesNotExist();
return _getDN404Storage().tokenApprovals[id];
}
/// @dev Sets `spender` as the approved account to manage token `id`, using `msgSender`.
///
/// Requirements:
/// - `msgSender` must be the owner or an approved operator for the token owner.
function _approveNFT(address spender, uint256 id, address msgSender)
internal
virtual
returns (address)
{
DN404Storage storage $ = _getDN404Storage();
address owner = $.aliasToAddress[_get($.oo, _ownershipIndex(id))];
if (msgSender != owner) {
if (!$.operatorApprovals[owner][msgSender]) {
revert ApprovalCallerNotOwnerNorApproved();
}
}
$.tokenApprovals[id] = spender;
return owner;
}
/// @dev Approve or remove the `operator` as an operator for `msgSender`,
/// without authorization checks.
function _setApprovalForAll(address operator, bool approved, address msgSender)
internal
virtual
{
_getDN404Storage().operatorApprovals[msgSender][operator] = approved;
}
/// @dev Calls the mirror contract to link it to this contract.
///
/// Reverts if the call to the mirror contract reverts.
function _linkMirrorContract(address mirror) internal virtual {
/// @solidity memory-safe-assembly
assembly {
mstore(0x00, 0x0f4599e5) // `linkMirrorContract(address)`.
mstore(0x20, caller())
if iszero(and(eq(mload(0x00), 1), call(gas(), mirror, 0, 0x1c, 0x24, 0x00, 0x20))) {
mstore(0x00, 0xd125259c) // `LinkMirrorContractFailed()`.
revert(0x1c, 0x04)
}
}
}
/// @dev Fallback modifier to dispatch calls from the mirror NFT contract
/// to internal functions in this contract.
modifier dn404Fallback() virtual {
DN404Storage storage $ = _getDN404Storage();
uint256 fnSelector = _calldataload(0x00) >> 224;
// `isApprovedForAll(address,address)`.
if (fnSelector == 0xe985e9c5) {
if (msg.sender != $.mirrorERC721) revert SenderNotMirror();
if (msg.data.length < 0x44) revert();
address owner = address(uint160(_calldataload(0x04)));
address operator = address(uint160(_calldataload(0x24)));
_return($.operatorApprovals[owner][operator] ? 1 : 0);
}
// `ownerOf(uint256)`.
if (fnSelector == 0x6352211e) {
if (msg.sender != $.mirrorERC721) revert SenderNotMirror();
if (msg.data.length < 0x24) revert();
uint256 id = _calldataload(0x04);
_return(uint160(_ownerOf(id)));
}
// `transferFromNFT(address,address,uint256,address)`.
if (fnSelector == 0xe5eb36c8) {
if (msg.sender != $.mirrorERC721) revert SenderNotMirror();
if (msg.data.length < 0x84) revert();
address from = address(uint160(_calldataload(0x04)));
address to = address(uint160(_calldataload(0x24)));
uint256 id = _calldataload(0x44);
address msgSender = address(uint160(_calldataload(0x64)));
_transferFromNFT(from, to, id, msgSender);
_return(1);
}
// `setApprovalForAll(address,bool,address)`.
if (fnSelector == 0x813500fc) {
if (msg.sender != $.mirrorERC721) revert SenderNotMirror();
if (msg.data.length < 0x64) revert();
address spender = address(uint160(_calldataload(0x04)));
bool status = _calldataload(0x24) != 0;
address msgSender = address(uint160(_calldataload(0x44)));
_setApprovalForAll(spender, status, msgSender);
_return(1);
}
// `approveNFT(address,uint256,address)`.
if (fnSelector == 0xd10b6e0c) {
if (msg.sender != $.mirrorERC721) revert SenderNotMirror();
if (msg.data.length < 0x64) revert();
address spender = address(uint160(_calldataload(0x04)));
uint256 id = _calldataload(0x24);
address msgSender = address(uint160(_calldataload(0x44)));
_return(uint160(_approveNFT(spender, id, msgSender)));
}
// `getApproved(uint256)`.
if (fnSelector == 0x081812fc) {
if (msg.sender != $.mirrorERC721) revert SenderNotMirror();
if (msg.data.length < 0x24) revert();
uint256 id = _calldataload(0x04);
_return(uint160(_getApproved(id)));
}
// `balanceOfNFT(address)`.
if (fnSelector == 0xf5b100ea) {
if (msg.sender != $.mirrorERC721) revert SenderNotMirror();
if (msg.data.length < 0x24) revert();
address owner = address(uint160(_calldataload(0x04)));
_return(_balanceOfNFT(owner));
}
// `totalNFTSupply()`.
if (fnSelector == 0xe2c79281) {
if (msg.sender != $.mirrorERC721) revert SenderNotMirror();
if (msg.data.length < 0x04) revert();
_return(_totalNFTSupply());
}
// `implementsDN404()`.
if (fnSelector == 0xb7a94eb8) {
_return(1);
}
_;
}
/// @dev Fallback function for calls from mirror NFT contract.
fallback() external payable virtual dn404Fallback {}
receive() external payable virtual {}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* PRIVATE HELPERS */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Struct containing packed log data for `Transfer` events to be
/// emitted by the mirror NFT contract.
struct _PackedLogs {
uint256[] logs;
uint256 offset;
}
/// @dev Initiates memory allocation for packed logs with `n` log items.
function _packedLogsMalloc(uint256 n) private pure returns (_PackedLogs memory p) {
/// @solidity memory-safe-assembly
assembly {
let logs := add(mload(0x40), 0x40) // Offset by 2 words for `_packedLogsSend`.
mstore(logs, n)
let offset := add(0x20, logs)
mstore(0x40, add(offset, shl(5, n)))
mstore(p, logs)
mstore(add(0x20, p), offset)
}
}
/// @dev Adds a packed log item to `p` with address `a`, token `id` and burn flag `burnBit`.
function _packedLogsAppend(_PackedLogs memory p, address a, uint256 id, uint256 burnBit)
private
pure
{
/// @solidity memory-safe-assembly
assembly {
let offset := mload(add(0x20, p))
mstore(offset, or(or(shl(96, a), shl(8, id)), burnBit))
mstore(add(0x20, p), add(offset, 0x20))
}
}
/// @dev Calls the `mirror` NFT contract to emit Transfer events for packed logs `p`.
function _packedLogsSend(_PackedLogs memory p, address mirror) private {
/// @solidity memory-safe-assembly
assembly {
let logs := mload(p)
let o := sub(logs, 0x40) // Start of calldata to send.
mstore(o, 0x263c69d6) // `logTransfer(uint256[])`.
mstore(add(o, 0x20), 0x20) // Offset of `logs` in the calldata to send.
let n := add(0x44, shl(5, mload(logs))) // Length of calldata to send.
if iszero(and(eq(mload(o), 1), call(gas(), mirror, 0, add(o, 0x1c), n, o, 0x20))) {
revert(o, 0x00)
}
}
}
/// @dev Struct of temporary variables for transfers.
struct _TransferTemps {
uint256 nftAmountToBurn;
uint256 nftAmountToMint;
uint256 fromBalance;
uint256 toBalance;
uint256 fromOwnedLength;
uint256 toOwnedLength;
}
/// @dev Returns if `a` has bytecode of non-zero length.
function _hasCode(address a) private view returns (bool result) {
/// @solidity memory-safe-assembly
assembly {
result := extcodesize(a) // Can handle dirty upper bits.
}
}
/// @dev Returns the calldata value at `offset`.
function _calldataload(uint256 offset) private pure returns (uint256 value) {
/// @solidity memory-safe-assembly
assembly {
value := calldataload(offset)
}
}
/// @dev Executes a return opcode to return `x` and end the current call frame.
function _return(uint256 x) private pure {
/// @solidity memory-safe-assembly
assembly {
mstore(0x00, x)
return(0x00, 0x20)
}
}
/// @dev Returns `max(0, x - y)`.
function _zeroFloorSub(uint256 x, uint256 y) private pure returns (uint256 z) {
/// @solidity memory-safe-assembly
assembly {
z := mul(gt(x, y), sub(x, y))
}
}
/// @dev Returns `i << 1`.
function _ownershipIndex(uint256 i) private pure returns (uint256) {
return i << 1;
}
/// @dev Returns `(i << 1) + 1`.
function _ownedIndex(uint256 i) private pure returns (uint256) {
unchecked {
return (i << 1) + 1;
}
}
/// @dev Returns the uint32 value at `index` in `map`.
function _get(Uint32Map storage map, uint256 index) private view returns (uint32 result) {
result = uint32(map.map[index >> 3] >> ((index & 7) << 5));
}
/// @dev Updates the uint32 value at `index` in `map`.
function _set(Uint32Map storage map, uint256 index, uint32 value) private {
/// @solidity memory-safe-assembly
assembly {
mstore(0x20, map.slot)
mstore(0x00, shr(3, index))
let s := keccak256(0x00, 0x40) // Storage slot.
let o := shl(5, and(index, 7)) // Storage slot offset (bits).
let v := sload(s) // Storage slot value.
let m := 0xffffffff // Value mask.
sstore(s, xor(v, shl(o, and(m, xor(shr(o, v), value)))))
}
}
/// @dev Sets the owner alias and the owned index together.
function _setOwnerAliasAndOwnedIndex(
Uint32Map storage map,
uint256 id,
uint32 ownership,
uint32 ownedIndex
) private {
/// @solidity memory-safe-assembly
assembly {
let value := or(shl(32, ownedIndex), and(0xffffffff, ownership))
mstore(0x20, map.slot)
mstore(0x00, shr(2, id))
let s := keccak256(0x00, 0x40) // Storage slot.
let o := shl(6, and(id, 3)) // Storage slot offset (bits).
let v := sload(s) // Storage slot value.
let m := 0xffffffffffffffff // Value mask.
sstore(s, xor(v, shl(o, and(m, xor(shr(o, v), value)))))
}
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;
/// @title DN404Mirror
/// @notice DN404Mirror provides an interface for interacting with the
/// NFT tokens in a DN404 implementation.
///
/// @author vectorized.eth (@optimizoor)
/// @author Quit (@0xQuit)
/// @author Michael Amadi (@AmadiMichaels)
/// @author cygaar (@0xCygaar)
/// @author Thomas (@0xjustadev)
/// @author Harrison (@PopPunkOnChain)
///
/// @dev Note:
/// - The ERC721 data is stored in the base DN404 contract.
contract DN404Mirror {
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* EVENTS */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Emitted when token `id` is transferred from `from` to `to`.
event Transfer(address indexed from, address indexed to, uint256 indexed id);
/// @dev Emitted when `owner` enables `account` to manage the `id` token.
event Approval(address indexed owner, address indexed account, uint256 indexed id);
/// @dev Emitted when `owner` enables or disables `operator` to manage all of their tokens.
event ApprovalForAll(address indexed owner, address indexed operator, bool isApproved);
/// @dev `keccak256(bytes("Transfer(address,address,uint256)"))`.
uint256 private constant _TRANSFER_EVENT_SIGNATURE =
0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef;
/// @dev `keccak256(bytes("Approval(address,address,uint256)"))`.
uint256 private constant _APPROVAL_EVENT_SIGNATURE =
0x8c5be1e5ebec7d5bd14f71427d1e84f3dd0314c0f7b2291e5b200ac8c7c3b925;
/// @dev `keccak256(bytes("ApprovalForAll(address,address,bool)"))`.
uint256 private constant _APPROVAL_FOR_ALL_EVENT_SIGNATURE =
0x17307eab39ab6107e8899845ad3d59bd9653f200f220920489ca2b5937696c31;
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* CUSTOM ERRORS */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Thrown when a call for an NFT function did not originate
/// from the base DN404 contract.
error SenderNotBase();
/// @dev Thrown when a call for an NFT function did not originate from the deployer.
error SenderNotDeployer();
/// @dev Thrown when transferring an NFT to a contract address that
/// does not implement ERC721Receiver.
error TransferToNonERC721ReceiverImplementer();
/// @dev Thrown when linking to the DN404 base contract and the
/// DN404 supportsInterface check fails or the call reverts.
error CannotLink();
/// @dev Thrown when a linkMirrorContract call is received and the
/// NFT mirror contract has already been linked to a DN404 base contract.
error AlreadyLinked();
/// @dev Thrown when retrieving the base DN404 address when a link has not
/// been established.
error NotLinked();
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* STORAGE */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Struct contain the NFT mirror contract storage.
struct DN404NFTStorage {
address baseERC20;
address deployer;
}
/// @dev Returns a storage pointer for DN404NFTStorage.
function _getDN404NFTStorage() internal pure virtual returns (DN404NFTStorage storage $) {
/// @solidity memory-safe-assembly
assembly {
// `uint72(bytes9(keccak256("DN404_MIRROR_STORAGE")))`.
$.slot := 0x3602298b8c10b01230 // Truncate to 9 bytes to reduce bytecode size.
}
}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* CONSTRUCTOR */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
constructor(address deployer) {
// For non-proxies, we will store the deployer so that only the deployer can
// link the base contract.
_getDN404NFTStorage().deployer = deployer;
}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* ERC721 OPERATIONS */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Returns the token collection name from the base DN404 contract.
function name() public view virtual returns (string memory result) {
address base = baseERC20();
/// @solidity memory-safe-assembly
assembly {
result := mload(0x40)
mstore(0x00, 0x06fdde03) // `name()`.
if iszero(staticcall(gas(), base, 0x1c, 0x04, 0x00, 0x00)) {
returndatacopy(result, 0x00, returndatasize())
revert(result, returndatasize())
}
returndatacopy(0x00, 0x00, 0x20)
returndatacopy(result, mload(0x00), 0x20)
returndatacopy(add(result, 0x20), add(mload(0x00), 0x20), mload(result))
mstore(0x40, add(add(result, 0x20), mload(result)))
}
}
/// @dev Returns the token collection symbol from the base DN404 contract.
function symbol() public view virtual returns (string memory result) {
address base = baseERC20();
/// @solidity memory-safe-assembly
assembly {
result := mload(0x40)
mstore(0x00, 0x95d89b41) // `symbol()`.
if iszero(staticcall(gas(), base, 0x1c, 0x04, 0x00, 0x00)) {
returndatacopy(result, 0x00, returndatasize())
revert(result, returndatasize())
}
returndatacopy(0x00, 0x00, 0x20)
returndatacopy(result, mload(0x00), 0x20)
returndatacopy(add(result, 0x20), add(mload(0x00), 0x20), mload(result))
mstore(0x40, add(add(result, 0x20), mload(result)))
}
}
/// @dev Returns the Uniform Resource Identifier (URI) for token `id` from
/// the base DN404 contract.
function tokenURI(uint256 id) public view virtual returns (string memory result) {
address base = baseERC20();
/// @solidity memory-safe-assembly
assembly {
result := mload(0x40)
mstore(0x20, id)
mstore(0x00, 0xc87b56dd) // `tokenURI()`.
if iszero(staticcall(gas(), base, 0x1c, 0x24, 0x00, 0x00)) {
returndatacopy(result, 0x00, returndatasize())
revert(result, returndatasize())
}
returndatacopy(0x00, 0x00, 0x20)
returndatacopy(result, mload(0x00), 0x20)
returndatacopy(add(result, 0x20), add(mload(0x00), 0x20), mload(result))
mstore(0x40, add(add(result, 0x20), mload(result)))
}
}
/// @dev Returns the total NFT supply from the base DN404 contract.
function totalSupply() public view virtual returns (uint256 result) {
address base = baseERC20();
/// @solidity memory-safe-assembly
assembly {
mstore(0x00, 0xe2c79281) // `totalNFTSupply()`.
if iszero(
and(gt(returndatasize(), 0x1f), staticcall(gas(), base, 0x1c, 0x04, 0x00, 0x20))
) {
returndatacopy(mload(0x40), 0x00, returndatasize())
revert(mload(0x40), returndatasize())
}
result := mload(0x00)
}
}
/// @dev Returns the number of NFT tokens owned by `owner` from the base DN404 contract.
///
/// Requirements:
/// - `owner` must not be the zero address.
function balanceOf(address owner) public view virtual returns (uint256 result) {
address base = baseERC20();
/// @solidity memory-safe-assembly
assembly {
mstore(0x20, shr(96, shl(96, owner)))
mstore(0x00, 0xf5b100ea) // `balanceOfNFT(address)`.
if iszero(
and(gt(returndatasize(), 0x1f), staticcall(gas(), base, 0x1c, 0x24, 0x00, 0x20))
) {
returndatacopy(mload(0x40), 0x00, returndatasize())
revert(mload(0x40), returndatasize())
}
result := mload(0x00)
}
}
/// @dev Returns the owner of token `id` from the base DN404 contract.
///
/// Requirements:
/// - Token `id` must exist.
function ownerOf(uint256 id) public view virtual returns (address result) {
address base = baseERC20();
/// @solidity memory-safe-assembly
assembly {
mstore(0x00, 0x6352211e) // `ownerOf(uint256)`.
mstore(0x20, id)
if iszero(
and(gt(returndatasize(), 0x1f), staticcall(gas(), base, 0x1c, 0x24, 0x00, 0x20))
) {
returndatacopy(mload(0x40), 0x00, returndatasize())
revert(mload(0x40), returndatasize())
}
result := shr(96, mload(0x0c))
}
}
/// @dev Sets `spender` as the approved account to manage token `id` in
/// the base DN404 contract.
///
/// Requirements:
/// - Token `id` must exist.
/// - The caller must be the owner of the token,
/// or an approved operator for the token owner.
///
/// Emits an {Approval} event.
function approve(address spender, uint256 id) public virtual {
address base = baseERC20();
/// @solidity memory-safe-assembly
assembly {
spender := shr(96, shl(96, spender))
let m := mload(0x40)
mstore(0x00, 0xd10b6e0c) // `approveNFT(address,uint256,address)`.
mstore(0x20, spender)
mstore(0x40, id)
mstore(0x60, caller())
if iszero(
and(
gt(returndatasize(), 0x1f),
call(gas(), base, callvalue(), 0x1c, 0x64, 0x00, 0x20)
)
) {
returndatacopy(m, 0x00, returndatasize())
revert(m, returndatasize())
}
mstore(0x40, m) // Restore the free memory pointer.
mstore(0x60, 0) // Restore the zero pointer.
// Emit the {Approval} event.
log4(codesize(), 0x00, _APPROVAL_EVENT_SIGNATURE, shr(96, mload(0x0c)), spender, id)
}
}
/// @dev Returns the account approved to manage token `id` from
/// the base DN404 contract.
///
/// Requirements:
/// - Token `id` must exist.
function getApproved(uint256 id) public view virtual returns (address result) {
address base = baseERC20();
/// @solidity memory-safe-assembly
assembly {
mstore(0x00, 0x081812fc) // `getApproved(uint256)`.
mstore(0x20, id)
if iszero(
and(gt(returndatasize(), 0x1f), staticcall(gas(), base, 0x1c, 0x24, 0x00, 0x20))
) {
returndatacopy(mload(0x40), 0x00, returndatasize())
revert(mload(0x40), returndatasize())
}
result := shr(96, mload(0x0c))
}
}
/// @dev Sets whether `operator` is approved to manage the tokens of the caller in
/// the base DN404 contract.
///
/// Emits an {ApprovalForAll} event.
function setApprovalForAll(address operator, bool approved) public virtual {
address base = baseERC20();
/// @solidity memory-safe-assembly
assembly {
operator := shr(96, shl(96, operator))
let m := mload(0x40)
mstore(0x00, 0x813500fc) // `setApprovalForAll(address,bool,address)`.
mstore(0x20, operator)
mstore(0x40, iszero(iszero(approved)))
mstore(0x60, caller())
if iszero(
and(eq(mload(0x00), 1), call(gas(), base, callvalue(), 0x1c, 0x64, 0x00, 0x20))
) {
returndatacopy(m, 0x00, returndatasize())
revert(m, returndatasize())
}
// Emit the {ApprovalForAll} event.
log3(0x40, 0x20, _APPROVAL_FOR_ALL_EVENT_SIGNATURE, caller(), operator)
mstore(0x40, m) // Restore the free memory pointer.
mstore(0x60, 0) // Restore the zero pointer.
}
}
/// @dev Returns whether `operator` is approved to manage the tokens of `owner` from
/// the base DN404 contract.
function isApprovedForAll(address owner, address operator)
public
view
virtual
returns (bool result)
{
address base = baseERC20();
/// @solidity memory-safe-assembly
assembly {
let m := mload(0x40)
mstore(0x40, operator)
mstore(0x2c, shl(96, owner))
mstore(0x0c, 0xe985e9c5000000000000000000000000) // `isApprovedForAll(address,address)`.
if iszero(
and(gt(returndatasize(), 0x1f), staticcall(gas(), base, 0x1c, 0x44, 0x00, 0x20))
) {
returndatacopy(m, 0x00, returndatasize())
revert(m, returndatasize())
}
mstore(0x40, m) // Restore the free memory pointer.
result := iszero(iszero(mload(0x00)))
}
}
/// @dev Transfers token `id` from `from` to `to`.
///
/// Requirements:
///
/// - Token `id` must exist.
/// - `from` must be the owner of the token.
/// - `to` cannot be the zero address.
/// - The caller must be the owner of the token, or be approved to manage the token.
///
/// Emits a {Transfer} event.
function transferFrom(address from, address to, uint256 id) public virtual {
address base = baseERC20();
/// @solidity memory-safe-assembly
assembly {
from := shr(96, shl(96, from))
to := shr(96, shl(96, to))
let m := mload(0x40)
mstore(m, 0xe5eb36c8) // `transferFromNFT(address,address,uint256,address)`.
mstore(add(m, 0x20), from)
mstore(add(m, 0x40), to)
mstore(add(m, 0x60), id)
mstore(add(m, 0x80), caller())
if iszero(
and(eq(mload(m), 1), call(gas(), base, callvalue(), add(m, 0x1c), 0x84, m, 0x20))
) {
returndatacopy(m, 0x00, returndatasize())
revert(m, returndatasize())
}
// Emit the {Transfer} event.
log4(codesize(), 0x00, _TRANSFER_EVENT_SIGNATURE, from, to, id)
}
}
/// @dev Equivalent to `safeTransferFrom(from, to, id, "")`.
function safeTransferFrom(address from, address to, uint256 id) public payable virtual {
transferFrom(from, to, id);
if (_hasCode(to)) _checkOnERC721Received(from, to, id, "");
}
/// @dev Transfers token `id` from `from` to `to`.
///
/// Requirements:
///
/// - Token `id` must exist.
/// - `from` must be the owner of the token.
/// - `to` cannot be the zero address.
/// - The caller must be the owner of the token, or be approved to manage the token.
/// - If `to` refers to a smart contract, it must implement
/// {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
///
/// Emits a {Transfer} event.
function safeTransferFrom(address from, address to, uint256 id, bytes calldata data)
public
virtual
{
transferFrom(from, to, id);
if (_hasCode(to)) _checkOnERC721Received(from, to, id, data);
}
/// @dev Returns true if this contract implements the interface defined by `interfaceId`.
/// See: https://eips.ethereum.org/EIPS/eip-165
/// This function call must use less than 30000 gas.
function supportsInterface(bytes4 interfaceId) public view virtual returns (bool result) {
/// @solidity memory-safe-assembly
assembly {
let s := shr(224, interfaceId)
// ERC165: 0x01ffc9a7, ERC721: 0x80ac58cd, ERC721Metadata: 0x5b5e139f.
result := or(or(eq(s, 0x01ffc9a7), eq(s, 0x80ac58cd)), eq(s, 0x5b5e139f))
}
}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* MIRROR OPERATIONS */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Returns the address of the base DN404 contract.
function baseERC20() public view virtual returns (address base) {
base = _getDN404NFTStorage().baseERC20;
if (base == address(0)) revert NotLinked();
}
/// @dev Fallback modifier to execute calls from the base DN404 contract.
modifier dn404NFTFallback() virtual {
DN404NFTStorage storage $ = _getDN404NFTStorage();
uint256 fnSelector = _calldataload(0x00) >> 224;
// `logTransfer(uint256[])`.
if (fnSelector == 0x263c69d6) {
if (msg.sender != $.baseERC20) revert SenderNotBase();
/// @solidity memory-safe-assembly
assembly {
// When returndatacopy copies 1 or more out-of-bounds bytes, it reverts.
returndatacopy(0x00, returndatasize(), lt(calldatasize(), 0x20))
let o := add(0x24, calldataload(0x04)) // Packed logs offset.
returndatacopy(0x00, returndatasize(), lt(calldatasize(), o))
let end := add(o, shl(5, calldataload(sub(o, 0x20))))
returndatacopy(0x00, returndatasize(), lt(calldatasize(), end))
for {} iszero(eq(o, end)) { o := add(0x20, o) } {
let d := calldataload(o) // Entry in the packed logs.
let a := shr(96, d) // The address.
let b := and(1, d) // Whether it is a burn.
log4(
codesize(),
0x00,
_TRANSFER_EVENT_SIGNATURE,
mul(a, b),
mul(a, iszero(b)),
shr(168, shl(160, d))
)
}
mstore(0x00, 0x01)
return(0x00, 0x20)
}
}
// `linkMirrorContract(address)`.
if (fnSelector == 0x0f4599e5) {
if ($.deployer != address(0)) {
if (address(uint160(_calldataload(0x04))) != $.deployer) {
revert SenderNotDeployer();
}
}
if ($.baseERC20 != address(0)) revert AlreadyLinked();
$.baseERC20 = msg.sender;
/// @solidity memory-safe-assembly
assembly {
mstore(0x00, 0x01)
return(0x00, 0x20)
}
}
_;
}
/// @dev Fallback function for calls from base DN404 contract.
fallback() external payable virtual dn404NFTFallback {}
receive() external payable virtual {}
/*«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-«-*/
/* PRIVATE HELPERS */
/*-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»-»*/
/// @dev Returns the calldata value at `offset`.
function _calldataload(uint256 offset) private pure returns (uint256 value) {
/// @solidity memory-safe-assembly
assembly {
value := calldataload(offset)
}
}
/// @dev Returns if `a` has bytecode of non-zero length.
function _hasCode(address a) private view returns (bool result) {
/// @solidity memory-safe-assembly
assembly {
result := extcodesize(a) // Can handle dirty upper bits.
}
}
/// @dev Perform a call to invoke {IERC721Receiver-onERC721Received} on `to`.
/// Reverts if the target does not support the function correctly.
function _checkOnERC721Received(address from, address to, uint256 id, bytes memory data)
private
{
/// @solidity memory-safe-assembly
assembly {
// Prepare the calldata.
let m := mload(0x40)
let onERC721ReceivedSelector := 0x150b7a02
mstore(m, onERC721ReceivedSelector)
mstore(add(m, 0x20), caller()) // The `operator`, which is always `msg.sender`.
mstore(add(m, 0x40), shr(96, shl(96, from)))
mstore(add(m, 0x60), id)
mstore(add(m, 0x80), 0x80)
let n := mload(data)
mstore(add(m, 0xa0), n)
if n { pop(staticcall(gas(), 4, add(data, 0x20), n, add(m, 0xc0), n)) }
// Revert if the call reverts.
if iszero(call(gas(), to, 0, add(m, 0x1c), add(n, 0xa4), m, 0x20)) {
if returndatasize() {
// Bubble up the revert if the call reverts.
returndatacopy(m, 0x00, returndatasize())
revert(m, returndatasize())
}
}
// Load the returndata and compare it.
if iszero(eq(mload(m), shl(224, onERC721ReceivedSelector))) {
mstore(0x00, 0xd1a57ed6) // `TransferToNonERC721ReceiverImplementer()`.
revert(0x1c, 0x04)
}
}
}
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
import { IMessageLibManager } from "./IMessageLibManager.sol";
import { IMessagingComposer } from "./IMessagingComposer.sol";
import { IMessagingChannel } from "./IMessagingChannel.sol";
import { IMessagingContext } from "./IMessagingContext.sol";
struct MessagingParams {
uint32 dstEid;
bytes32 receiver;
bytes message;
bytes options;
bool payInLzToken;
}
struct MessagingReceipt {
bytes32 guid;
uint64 nonce;
MessagingFee fee;
}
struct MessagingFee {
uint256 nativeFee;
uint256 lzTokenFee;
}
struct Origin {
uint32 srcEid;
bytes32 sender;
uint64 nonce;
}
interface ILayerZeroEndpointV2 is IMessageLibManager, IMessagingComposer, IMessagingChannel, IMessagingContext {
event PacketSent(bytes encodedPayload, bytes options, address sendLibrary);
event PacketVerified(Origin origin, address receiver, bytes32 payloadHash);
event PacketDelivered(Origin origin, address receiver);
event LzReceiveAlert(
address indexed receiver,
address indexed executor,
Origin origin,
bytes32 guid,
uint256 gas,
uint256 value,
bytes message,
bytes extraData,
bytes reason
);
event LzTokenSet(address token);
event DelegateSet(address sender, address delegate);
function quote(MessagingParams calldata _params, address _sender) external view returns (MessagingFee memory);
function send(
MessagingParams calldata _params,
address _refundAddress
) external payable returns (MessagingReceipt memory);
function verify(Origin calldata _origin, address _receiver, bytes32 _payloadHash) external;
function verifiable(Origin calldata _origin, address _receiver) external view returns (bool);
function initializable(Origin calldata _origin, address _receiver) external view returns (bool);
function lzReceive(
Origin calldata _origin,
address _receiver,
bytes32 _guid,
bytes calldata _message,
bytes calldata _extraData
) external payable;
// oapp can burn messages partially by calling this function with its own business logic if messages are verified in order
function clear(address _oapp, Origin calldata _origin, bytes32 _guid, bytes calldata _message) external;
function setLzToken(address _lzToken) external;
function lzToken() external view returns (address);
function nativeToken() external view returns (address);
function setDelegate(address _delegate) external;
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
import { Origin } from "./ILayerZeroEndpointV2.sol";
interface ILayerZeroReceiver {
function allowInitializePath(Origin calldata _origin) external view returns (bool);
function nextNonce(uint32 _eid, bytes32 _sender) external view returns (uint64);
function lzReceive(
Origin calldata _origin,
bytes32 _guid,
bytes calldata _message,
address _executor,
bytes calldata _extraData
) external payable;
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
import { IERC165 } from "@openzeppelin/contracts/utils/introspection/IERC165.sol";
import { SetConfigParam } from "./IMessageLibManager.sol";
enum MessageLibType {
Send,
Receive,
SendAndReceive
}
interface IMessageLib is IERC165 {
function setConfig(address _oapp, SetConfigParam[] calldata _config) external;
function getConfig(uint32 _eid, address _oapp, uint32 _configType) external view returns (bytes memory config);
function isSupportedEid(uint32 _eid) external view returns (bool);
// message libs of same major version are compatible
function version() external view returns (uint64 major, uint8 minor, uint8 endpointVersion);
function messageLibType() external view returns (MessageLibType);
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
struct SetConfigParam {
uint32 eid;
uint32 configType;
bytes config;
}
interface IMessageLibManager {
struct Timeout {
address lib;
uint256 expiry;
}
event LibraryRegistered(address newLib);
event DefaultSendLibrarySet(uint32 eid, address newLib);
event DefaultReceiveLibrarySet(uint32 eid, address newLib);
event DefaultReceiveLibraryTimeoutSet(uint32 eid, address oldLib, uint256 expiry);
event SendLibrarySet(address sender, uint32 eid, address newLib);
event ReceiveLibrarySet(address receiver, uint32 eid, address newLib);
event ReceiveLibraryTimeoutSet(address receiver, uint32 eid, address oldLib, uint256 timeout);
function registerLibrary(address _lib) external;
function isRegisteredLibrary(address _lib) external view returns (bool);
function getRegisteredLibraries() external view returns (address[] memory);
function setDefaultSendLibrary(uint32 _eid, address _newLib) external;
function defaultSendLibrary(uint32 _eid) external view returns (address);
function setDefaultReceiveLibrary(uint32 _eid, address _newLib, uint256 _gracePeriod) external;
function defaultReceiveLibrary(uint32 _eid) external view returns (address);
function setDefaultReceiveLibraryTimeout(uint32 _eid, address _lib, uint256 _expiry) external;
function defaultReceiveLibraryTimeout(uint32 _eid) external view returns (address lib, uint256 expiry);
function isSupportedEid(uint32 _eid) external view returns (bool);
function isValidReceiveLibrary(address _receiver, uint32 _eid, address _lib) external view returns (bool);
/// ------------------- OApp interfaces -------------------
function setSendLibrary(address _oapp, uint32 _eid, address _newLib) external;
function getSendLibrary(address _sender, uint32 _eid) external view returns (address lib);
function isDefaultSendLibrary(address _sender, uint32 _eid) external view returns (bool);
function setReceiveLibrary(address _oapp, uint32 _eid, address _newLib, uint256 _gracePeriod) external;
function getReceiveLibrary(address _receiver, uint32 _eid) external view returns (address lib, bool isDefault);
function setReceiveLibraryTimeout(address _oapp, uint32 _eid, address _lib, uint256 _expiry) external;
function receiveLibraryTimeout(address _receiver, uint32 _eid) external view returns (address lib, uint256 expiry);
function setConfig(address _oapp, address _lib, SetConfigParam[] calldata _params) external;
function getConfig(
address _oapp,
address _lib,
uint32 _eid,
uint32 _configType
) external view returns (bytes memory config);
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
interface IMessagingChannel {
event InboundNonceSkipped(uint32 srcEid, bytes32 sender, address receiver, uint64 nonce);
event PacketNilified(uint32 srcEid, bytes32 sender, address receiver, uint64 nonce, bytes32 payloadHash);
event PacketBurnt(uint32 srcEid, bytes32 sender, address receiver, uint64 nonce, bytes32 payloadHash);
function eid() external view returns (uint32);
// this is an emergency function if a message cannot be verified for some reasons
// required to provide _nextNonce to avoid race condition
function skip(address _oapp, uint32 _srcEid, bytes32 _sender, uint64 _nonce) external;
function nilify(address _oapp, uint32 _srcEid, bytes32 _sender, uint64 _nonce, bytes32 _payloadHash) external;
function burn(address _oapp, uint32 _srcEid, bytes32 _sender, uint64 _nonce, bytes32 _payloadHash) external;
function nextGuid(address _sender, uint32 _dstEid, bytes32 _receiver) external view returns (bytes32);
function inboundNonce(address _receiver, uint32 _srcEid, bytes32 _sender) external view returns (uint64);
function outboundNonce(address _sender, uint32 _dstEid, bytes32 _receiver) external view returns (uint64);
function inboundPayloadHash(
address _receiver,
uint32 _srcEid,
bytes32 _sender,
uint64 _nonce
) external view returns (bytes32);
function lazyInboundNonce(address _receiver, uint32 _srcEid, bytes32 _sender) external view returns (uint64);
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
interface IMessagingComposer {
event ComposeSent(address from, address to, bytes32 guid, uint16 index, bytes message);
event ComposeDelivered(address from, address to, bytes32 guid, uint16 index);
event LzComposeAlert(
address indexed from,
address indexed to,
address indexed executor,
bytes32 guid,
uint16 index,
uint256 gas,
uint256 value,
bytes message,
bytes extraData,
bytes reason
);
function composeQueue(
address _from,
address _to,
bytes32 _guid,
uint16 _index
) external view returns (bytes32 messageHash);
function sendCompose(address _to, bytes32 _guid, uint16 _index, bytes calldata _message) external;
function lzCompose(
address _from,
address _to,
bytes32 _guid,
uint16 _index,
bytes calldata _message,
bytes calldata _extraData
) external payable;
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
interface IMessagingContext {
function isSendingMessage() external view returns (bool);
function getSendContext() external view returns (uint32 dstEid, address sender);
}// SPDX-License-Identifier: MIT
pragma solidity >=0.8.0;
import { MessagingFee } from "./ILayerZeroEndpointV2.sol";
import { IMessageLib } from "./IMessageLib.sol";
struct Packet {
uint64 nonce;
uint32 srcEid;
address sender;
uint32 dstEid;
bytes32 receiver;
bytes32 guid;
bytes message;
}
interface ISendLib is IMessageLib {
function send(
Packet calldata _packet,
bytes calldata _options,
bool _payInLzToken
) external returns (MessagingFee memory, bytes memory encodedPacket);
function quote(
Packet calldata _packet,
bytes calldata _options,
bool _payInLzToken
) external view returns (MessagingFee memory);
function setTreasury(address _treasury) external;
function withdrawFee(address _to, uint256 _amount) external;
function withdrawLzTokenFee(address _lzToken, address _to, uint256 _amount) external;
}// SPDX-License-Identifier: LZBL-1.2
pragma solidity ^0.8.20;
library AddressCast {
error AddressCast_InvalidSizeForAddress();
error AddressCast_InvalidAddress();
function toBytes32(bytes calldata _addressBytes) internal pure returns (bytes32 result) {
if (_addressBytes.length > 32) revert AddressCast_InvalidAddress();
result = bytes32(_addressBytes);
unchecked {
uint256 offset = 32 - _addressBytes.length;
result = result >> (offset * 8);
}
}
function toBytes32(address _address) internal pure returns (bytes32 result) {
result = bytes32(uint256(uint160(_address)));
}
function toBytes(bytes32 _addressBytes32, uint256 _size) internal pure returns (bytes memory result) {
if (_size == 0 || _size > 32) revert AddressCast_InvalidSizeForAddress();
result = new bytes(_size);
unchecked {
uint256 offset = 256 - _size * 8;
assembly {
mstore(add(result, 32), shl(offset, _addressBytes32))
}
}
}
function toAddress(bytes32 _addressBytes32) internal pure returns (address result) {
result = address(uint160(uint256(_addressBytes32)));
}
function toAddress(bytes calldata _addressBytes) internal pure returns (address result) {
if (_addressBytes.length != 20) revert AddressCast_InvalidAddress();
result = address(bytes20(_addressBytes));
}
}// SPDX-License-Identifier: LZBL-1.2
pragma solidity ^0.8.20;
import { Packet } from "../../interfaces/ISendLib.sol";
import { AddressCast } from "../../libs/AddressCast.sol";
library PacketV1Codec {
using AddressCast for address;
using AddressCast for bytes32;
uint8 internal constant PACKET_VERSION = 1;
// header (version + nonce + path)
// version
uint256 private constant PACKET_VERSION_OFFSET = 0;
// nonce
uint256 private constant NONCE_OFFSET = 1;
// path
uint256 private constant SRC_EID_OFFSET = 9;
uint256 private constant SENDER_OFFSET = 13;
uint256 private constant DST_EID_OFFSET = 45;
uint256 private constant RECEIVER_OFFSET = 49;
// payload (guid + message)
uint256 private constant GUID_OFFSET = 81; // keccak256(nonce + path)
uint256 private constant MESSAGE_OFFSET = 113;
function encode(Packet memory _packet) internal pure returns (bytes memory encodedPacket) {
encodedPacket = abi.encodePacked(
PACKET_VERSION,
_packet.nonce,
_packet.srcEid,
_packet.sender.toBytes32(),
_packet.dstEid,
_packet.receiver,
_packet.guid,
_packet.message
);
}
function encodePacketHeader(Packet memory _packet) internal pure returns (bytes memory) {
return
abi.encodePacked(
PACKET_VERSION,
_packet.nonce,
_packet.srcEid,
_packet.sender.toBytes32(),
_packet.dstEid,
_packet.receiver
);
}
function encodePayload(Packet memory _packet) internal pure returns (bytes memory) {
return abi.encodePacked(_packet.guid, _packet.message);
}
function header(bytes calldata _packet) internal pure returns (bytes calldata) {
return _packet[0:GUID_OFFSET];
}
function version(bytes calldata _packet) internal pure returns (uint8) {
return uint8(bytes1(_packet[PACKET_VERSION_OFFSET:NONCE_OFFSET]));
}
function nonce(bytes calldata _packet) internal pure returns (uint64) {
return uint64(bytes8(_packet[NONCE_OFFSET:SRC_EID_OFFSET]));
}
function srcEid(bytes calldata _packet) internal pure returns (uint32) {
return uint32(bytes4(_packet[SRC_EID_OFFSET:SENDER_OFFSET]));
}
function sender(bytes calldata _packet) internal pure returns (bytes32) {
return bytes32(_packet[SENDER_OFFSET:DST_EID_OFFSET]);
}
function senderAddressB20(bytes calldata _packet) internal pure returns (address) {
return sender(_packet).toAddress();
}
function dstEid(bytes calldata _packet) internal pure returns (uint32) {
return uint32(bytes4(_packet[DST_EID_OFFSET:RECEIVER_OFFSET]));
}
function receiver(bytes calldata _packet) internal pure returns (bytes32) {
return bytes32(_packet[RECEIVER_OFFSET:GUID_OFFSET]);
}
function receiverB20(bytes calldata _packet) internal pure returns (address) {
return receiver(_packet).toAddress();
}
function guid(bytes calldata _packet) internal pure returns (bytes32) {
return bytes32(_packet[GUID_OFFSET:MESSAGE_OFFSET]);
}
function message(bytes calldata _packet) internal pure returns (bytes calldata) {
return bytes(_packet[MESSAGE_OFFSET:]);
}
function payload(bytes calldata _packet) internal pure returns (bytes calldata) {
return bytes(_packet[GUID_OFFSET:]);
}
function payloadHash(bytes calldata _packet) internal pure returns (bytes32) {
return keccak256(payload(_packet));
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
// @dev Import the 'MessagingFee' and 'MessagingReceipt' so it's exposed to OApp implementers
// solhint-disable-next-line no-unused-import
import { OAppSender, MessagingFee, MessagingReceipt } from "./OAppSender.sol";
// @dev Import the 'Origin' so it's exposed to OApp implementers
// solhint-disable-next-line no-unused-import
import { OAppReceiver, Origin } from "./OAppReceiver.sol";
import { OAppCore } from "./OAppCore.sol";
/**
* @title OApp
* @dev Abstract contract serving as the base for OApp implementation, combining OAppSender and OAppReceiver functionality.
*/
abstract contract OApp is OAppSender, OAppReceiver {
/**
* @dev Constructor to initialize the OApp with the provided endpoint and owner.
* @param _endpoint The address of the LOCAL LayerZero endpoint.
* @param _delegate The delegate capable of making OApp configurations inside of the endpoint.
*/
constructor(address _endpoint, address _delegate) OAppCore(_endpoint, _delegate) {}
/**
* @notice Retrieves the OApp version information.
* @return senderVersion The version of the OAppSender.sol implementation.
* @return receiverVersion The version of the OAppReceiver.sol implementation.
*/
function oAppVersion()
public
pure
virtual
override(OAppSender, OAppReceiver)
returns (uint64 senderVersion, uint64 receiverVersion)
{
return (SENDER_VERSION, RECEIVER_VERSION);
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
import { IOAppCore, ILayerZeroEndpointV2 } from "./interfaces/IOAppCore.sol";
/**
* @title OAppCore
* @dev Abstract contract implementing the IOAppCore interface with basic OApp configurations.
*/
abstract contract OAppCore is IOAppCore, Ownable {
// The LayerZero endpoint associated with the given OApp
ILayerZeroEndpointV2 public immutable endpoint;
// Mapping to store peers associated with corresponding endpoints
mapping(uint32 eid => bytes32 peer) public peers;
/**
* @dev Constructor to initialize the OAppCore with the provided endpoint and delegate.
* @param _endpoint The address of the LOCAL Layer Zero endpoint.
* @param _delegate The delegate capable of making OApp configurations inside of the endpoint.
*
* @dev The delegate typically should be set as the owner of the contract.
*/
constructor(address _endpoint, address _delegate) {
endpoint = ILayerZeroEndpointV2(_endpoint);
if (_delegate == address(0)) revert InvalidDelegate();
endpoint.setDelegate(_delegate);
}
/**
* @notice Sets the peer address (OApp instance) for a corresponding endpoint.
* @param _eid The endpoint ID.
* @param _peer The address of the peer to be associated with the corresponding endpoint.
*
* @dev Only the owner/admin of the OApp can call this function.
* @dev Indicates that the peer is trusted to send LayerZero messages to this OApp.
* @dev Set this to bytes32(0) to remove the peer address.
* @dev Peer is a bytes32 to accommodate non-evm chains.
*/
function setPeer(uint32 _eid, bytes32 _peer) public virtual onlyOwner {
_setPeer(_eid, _peer);
}
/**
* @notice Sets the peer address (OApp instance) for a corresponding endpoint.
* @param _eid The endpoint ID.
* @param _peer The address of the peer to be associated with the corresponding endpoint.
*
* @dev Indicates that the peer is trusted to send LayerZero messages to this OApp.
* @dev Set this to bytes32(0) to remove the peer address.
* @dev Peer is a bytes32 to accommodate non-evm chains.
*/
function _setPeer(uint32 _eid, bytes32 _peer) internal virtual {
peers[_eid] = _peer;
emit PeerSet(_eid, _peer);
}
/**
* @notice Internal function to get the peer address associated with a specific endpoint; reverts if NOT set.
* ie. the peer is set to bytes32(0).
* @param _eid The endpoint ID.
* @return peer The address of the peer associated with the specified endpoint.
*/
function _getPeerOrRevert(uint32 _eid) internal view virtual returns (bytes32) {
bytes32 peer = peers[_eid];
if (peer == bytes32(0)) revert NoPeer(_eid);
return peer;
}
/**
* @notice Sets the delegate address for the OApp.
* @param _delegate The address of the delegate to be set.
*
* @dev Only the owner/admin of the OApp can call this function.
* @dev Provides the ability for a delegate to set configs, on behalf of the OApp, directly on the Endpoint contract.
*/
function setDelegate(address _delegate) public onlyOwner {
endpoint.setDelegate(_delegate);
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
import { IOAppReceiver, Origin } from "./interfaces/IOAppReceiver.sol";
import { OAppCore } from "./OAppCore.sol";
/**
* @title OAppReceiver
* @dev Abstract contract implementing the ILayerZeroReceiver interface and extending OAppCore for OApp receivers.
*/
abstract contract OAppReceiver is IOAppReceiver, OAppCore {
// Custom error message for when the caller is not the registered endpoint/
error OnlyEndpoint(address addr);
// @dev The version of the OAppReceiver implementation.
// @dev Version is bumped when changes are made to this contract.
uint64 internal constant RECEIVER_VERSION = 2;
/**
* @notice Retrieves the OApp version information.
* @return senderVersion The version of the OAppSender.sol contract.
* @return receiverVersion The version of the OAppReceiver.sol contract.
*
* @dev Providing 0 as the default for OAppSender version. Indicates that the OAppSender is not implemented.
* ie. this is a RECEIVE only OApp.
* @dev If the OApp uses both OAppSender and OAppReceiver, then this needs to be override returning the correct versions.
*/
function oAppVersion() public view virtual returns (uint64 senderVersion, uint64 receiverVersion) {
return (0, RECEIVER_VERSION);
}
/**
* @notice Indicates whether an address is an approved composeMsg sender to the Endpoint.
* @dev _origin The origin information containing the source endpoint and sender address.
* - srcEid: The source chain endpoint ID.
* - sender: The sender address on the src chain.
* - nonce: The nonce of the message.
* @dev _message The lzReceive payload.
* @param _sender The sender address.
* @return isSender Is a valid sender.
*
* @dev Applications can optionally choose to implement separate composeMsg senders that are NOT the bridging layer.
* @dev The default sender IS the OAppReceiver implementer.
*/
function isComposeMsgSender(
Origin calldata /*_origin*/,
bytes calldata /*_message*/,
address _sender
) public view virtual returns (bool) {
return _sender == address(this);
}
/**
* @notice Checks if the path initialization is allowed based on the provided origin.
* @param origin The origin information containing the source endpoint and sender address.
* @return Whether the path has been initialized.
*
* @dev This indicates to the endpoint that the OApp has enabled msgs for this particular path to be received.
* @dev This defaults to assuming if a peer has been set, its initialized.
* Can be overridden by the OApp if there is other logic to determine this.
*/
function allowInitializePath(Origin calldata origin) public view virtual returns (bool) {
return peers[origin.srcEid] == origin.sender;
}
/**
* @notice Retrieves the next nonce for a given source endpoint and sender address.
* @dev _srcEid The source endpoint ID.
* @dev _sender The sender address.
* @return nonce The next nonce.
*
* @dev The path nonce starts from 1. If 0 is returned it means that there is NO nonce ordered enforcement.
* @dev Is required by the off-chain executor to determine the OApp expects msg execution is ordered.
* @dev This is also enforced by the OApp.
* @dev By default this is NOT enabled. ie. nextNonce is hardcoded to return 0.
*/
function nextNonce(uint32 /*_srcEid*/, bytes32 /*_sender*/) public view virtual returns (uint64 nonce) {
return 0;
}
/**
* @dev Entry point for receiving messages or packets from the endpoint.
* @param _origin The origin information containing the source endpoint and sender address.
* - srcEid: The source chain endpoint ID.
* - sender: The sender address on the src chain.
* - nonce: The nonce of the message.
* @param _guid The unique identifier for the received LayerZero message.
* @param _message The payload of the received message.
* @param _executor The address of the executor for the received message.
* @param _extraData Additional arbitrary data provided by the corresponding executor.
*
* @dev Entry point for receiving msg/packet from the LayerZero endpoint.
*/
function lzReceive(
Origin calldata _origin,
bytes32 _guid,
bytes calldata _message,
address _executor,
bytes calldata _extraData
) public payable virtual {
// Ensures that only the endpoint can attempt to lzReceive() messages to this OApp.
if (address(endpoint) != msg.sender) revert OnlyEndpoint(msg.sender);
// Ensure that the sender matches the expected peer for the source endpoint.
if (_getPeerOrRevert(_origin.srcEid) != _origin.sender) revert OnlyPeer(_origin.srcEid, _origin.sender);
// Call the internal OApp implementation of lzReceive.
_lzReceive(_origin, _guid, _message, _executor, _extraData);
}
/**
* @dev Internal function to implement lzReceive logic without needing to copy the basic parameter validation.
*/
function _lzReceive(
Origin calldata _origin,
bytes32 _guid,
bytes calldata _message,
address _executor,
bytes calldata _extraData
) internal virtual;
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
import { SafeERC20, IERC20 } from "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import { MessagingParams, MessagingFee, MessagingReceipt } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ILayerZeroEndpointV2.sol";
import { OAppCore } from "./OAppCore.sol";
/**
* @title OAppSender
* @dev Abstract contract implementing the OAppSender functionality for sending messages to a LayerZero endpoint.
*/
abstract contract OAppSender is OAppCore {
using SafeERC20 for IERC20;
// Custom error messages
error NotEnoughNative(uint256 msgValue);
error LzTokenUnavailable();
// @dev The version of the OAppSender implementation.
// @dev Version is bumped when changes are made to this contract.
uint64 internal constant SENDER_VERSION = 1;
/**
* @notice Retrieves the OApp version information.
* @return senderVersion The version of the OAppSender.sol contract.
* @return receiverVersion The version of the OAppReceiver.sol contract.
*
* @dev Providing 0 as the default for OAppReceiver version. Indicates that the OAppReceiver is not implemented.
* ie. this is a SEND only OApp.
* @dev If the OApp uses both OAppSender and OAppReceiver, then this needs to be override returning the correct versions
*/
function oAppVersion() public view virtual returns (uint64 senderVersion, uint64 receiverVersion) {
return (SENDER_VERSION, 0);
}
/**
* @dev Internal function to interact with the LayerZero EndpointV2.quote() for fee calculation.
* @param _dstEid The destination endpoint ID.
* @param _message The message payload.
* @param _options Additional options for the message.
* @param _payInLzToken Flag indicating whether to pay the fee in LZ tokens.
* @return fee The calculated MessagingFee for the message.
* - nativeFee: The native fee for the message.
* - lzTokenFee: The LZ token fee for the message.
*/
function _quote(
uint32 _dstEid,
bytes memory _message,
bytes memory _options,
bool _payInLzToken
) internal view virtual returns (MessagingFee memory fee) {
return
endpoint.quote(
MessagingParams(_dstEid, _getPeerOrRevert(_dstEid), _message, _options, _payInLzToken),
address(this)
);
}
/**
* @dev Internal function to interact with the LayerZero EndpointV2.send() for sending a message.
* @param _dstEid The destination endpoint ID.
* @param _message The message payload.
* @param _options Additional options for the message.
* @param _fee The calculated LayerZero fee for the message.
* - nativeFee: The native fee.
* - lzTokenFee: The lzToken fee.
* @param _refundAddress The address to receive any excess fee values sent to the endpoint.
* @return receipt The receipt for the sent message.
* - guid: The unique identifier for the sent message.
* - nonce: The nonce of the sent message.
* - fee: The LayerZero fee incurred for the message.
*/
function _lzSend(
uint32 _dstEid,
bytes memory _message,
bytes memory _options,
MessagingFee memory _fee,
address _refundAddress
) internal virtual returns (MessagingReceipt memory receipt) {
// @dev Push corresponding fees to the endpoint, any excess is sent back to the _refundAddress from the endpoint.
uint256 messageValue = _payNative(_fee.nativeFee);
if (_fee.lzTokenFee > 0) _payLzToken(_fee.lzTokenFee);
return
// solhint-disable-next-line check-send-result
endpoint.send{ value: messageValue }(
MessagingParams(_dstEid, _getPeerOrRevert(_dstEid), _message, _options, _fee.lzTokenFee > 0),
_refundAddress
);
}
/**
* @dev Internal function to pay the native fee associated with the message.
* @param _nativeFee The native fee to be paid.
* @return nativeFee The amount of native currency paid.
*
* @dev If the OApp needs to initiate MULTIPLE LayerZero messages in a single transaction,
* this will need to be overridden because msg.value would contain multiple lzFees.
* @dev Should be overridden in the event the LayerZero endpoint requires a different native currency.
* @dev Some EVMs use an ERC20 as a method for paying transactions/gasFees.
* @dev The endpoint is EITHER/OR, ie. it will NOT support both types of native payment at a time.
*/
function _payNative(uint256 _nativeFee) internal virtual returns (uint256 nativeFee) {
if (msg.value != _nativeFee) revert NotEnoughNative(msg.value);
return _nativeFee;
}
/**
* @dev Internal function to pay the LZ token fee associated with the message.
* @param _lzTokenFee The LZ token fee to be paid.
*
* @dev If the caller is trying to pay in the specified lzToken, then the lzTokenFee is passed to the endpoint.
* @dev Any excess sent, is passed back to the specified _refundAddress in the _lzSend().
*/
function _payLzToken(uint256 _lzTokenFee) internal virtual {
// @dev Cannot cache the token because it is not immutable in the endpoint.
address lzToken = endpoint.lzToken();
if (lzToken == address(0)) revert LzTokenUnavailable();
// Pay LZ token fee by sending tokens to the endpoint.
IERC20(lzToken).safeTransferFrom(msg.sender, address(endpoint), _lzTokenFee);
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
import { ILayerZeroEndpointV2 } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ILayerZeroEndpointV2.sol";
/**
* @title IOAppCore
*/
interface IOAppCore {
// Custom error messages
error OnlyPeer(uint32 eid, bytes32 sender);
error NoPeer(uint32 eid);
error InvalidEndpointCall();
error InvalidDelegate();
// Event emitted when a peer (OApp) is set for a corresponding endpoint
event PeerSet(uint32 eid, bytes32 peer);
/**
* @notice Retrieves the OApp version information.
* @return senderVersion The version of the OAppSender.sol contract.
* @return receiverVersion The version of the OAppReceiver.sol contract.
*/
function oAppVersion() external view returns (uint64 senderVersion, uint64 receiverVersion);
/**
* @notice Retrieves the LayerZero endpoint associated with the OApp.
* @return iEndpoint The LayerZero endpoint as an interface.
*/
function endpoint() external view returns (ILayerZeroEndpointV2 iEndpoint);
/**
* @notice Retrieves the peer (OApp) associated with a corresponding endpoint.
* @param _eid The endpoint ID.
* @return peer The peer address (OApp instance) associated with the corresponding endpoint.
*/
function peers(uint32 _eid) external view returns (bytes32 peer);
/**
* @notice Sets the peer address (OApp instance) for a corresponding endpoint.
* @param _eid The endpoint ID.
* @param _peer The address of the peer to be associated with the corresponding endpoint.
*/
function setPeer(uint32 _eid, bytes32 _peer) external;
/**
* @notice Sets the delegate address for the OApp Core.
* @param _delegate The address of the delegate to be set.
*/
function setDelegate(address _delegate) external;
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
/**
* @title IOAppMsgInspector
* @dev Interface for the OApp Message Inspector, allowing examination of message and options contents.
*/
interface IOAppMsgInspector {
// Custom error message for inspection failure
error InspectionFailed(bytes message, bytes options);
/**
* @notice Allows the inspector to examine LayerZero message contents and optionally throw a revert if invalid.
* @param _message The message payload to be inspected.
* @param _options Additional options or parameters for inspection.
* @return valid A boolean indicating whether the inspection passed (true) or failed (false).
*
* @dev Optionally done as a revert, OR use the boolean provided to handle the failure.
*/
function inspect(bytes calldata _message, bytes calldata _options) external view returns (bool valid);
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
/**
* @dev Struct representing enforced option parameters.
*/
struct EnforcedOptionParam {
uint32 eid; // Endpoint ID
uint16 msgType; // Message Type
bytes options; // Additional options
}
/**
* @title IOAppOptionsType3
* @dev Interface for the OApp with Type 3 Options, allowing the setting and combining of enforced options.
*/
interface IOAppOptionsType3 {
// Custom error message for invalid options
error InvalidOptions(bytes options);
// Event emitted when enforced options are set
event EnforcedOptionSet(EnforcedOptionParam[] _enforcedOptions);
/**
* @notice Sets enforced options for specific endpoint and message type combinations.
* @param _enforcedOptions An array of EnforcedOptionParam structures specifying enforced options.
*/
function setEnforcedOptions(EnforcedOptionParam[] calldata _enforcedOptions) external;
/**
* @notice Combines options for a given endpoint and message type.
* @param _eid The endpoint ID.
* @param _msgType The OApp message type.
* @param _extraOptions Additional options passed by the caller.
* @return options The combination of caller specified options AND enforced options.
*/
function combineOptions(
uint32 _eid,
uint16 _msgType,
bytes calldata _extraOptions
) external view returns (bytes memory options);
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
import { ILayerZeroReceiver, Origin } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ILayerZeroReceiver.sol";
interface IOAppReceiver is ILayerZeroReceiver {
/**
* @notice Indicates whether an address is an approved composeMsg sender to the Endpoint.
* @param _origin The origin information containing the source endpoint and sender address.
* - srcEid: The source chain endpoint ID.
* - sender: The sender address on the src chain.
* - nonce: The nonce of the message.
* @param _message The lzReceive payload.
* @param _sender The sender address.
* @return isSender Is a valid sender.
*
* @dev Applications can optionally choose to implement a separate composeMsg sender that is NOT the bridging layer.
* @dev The default sender IS the OAppReceiver implementer.
*/
function isComposeMsgSender(
Origin calldata _origin,
bytes calldata _message,
address _sender
) external view returns (bool isSender);
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
import { IOAppOptionsType3, EnforcedOptionParam } from "../interfaces/IOAppOptionsType3.sol";
/**
* @title OAppOptionsType3
* @dev Abstract contract implementing the IOAppOptionsType3 interface with type 3 options.
*/
abstract contract OAppOptionsType3 is IOAppOptionsType3, Ownable {
uint16 internal constant OPTION_TYPE_3 = 3;
// @dev The "msgType" should be defined in the child contract.
mapping(uint32 eid => mapping(uint16 msgType => bytes enforcedOption)) public enforcedOptions;
/**
* @dev Sets the enforced options for specific endpoint and message type combinations.
* @param _enforcedOptions An array of EnforcedOptionParam structures specifying enforced options.
*
* @dev Only the owner/admin of the OApp can call this function.
* @dev Provides a way for the OApp to enforce things like paying for PreCrime, AND/OR minimum dst lzReceive gas amounts etc.
* @dev These enforced options can vary as the potential options/execution on the remote may differ as per the msgType.
* eg. Amount of lzReceive() gas necessary to deliver a lzCompose() message adds overhead you dont want to pay
* if you are only making a standard LayerZero message ie. lzReceive() WITHOUT sendCompose().
*/
function setEnforcedOptions(EnforcedOptionParam[] calldata _enforcedOptions) public virtual onlyOwner {
_setEnforcedOptions(_enforcedOptions);
}
/**
* @dev Sets the enforced options for specific endpoint and message type combinations.
* @param _enforcedOptions An array of EnforcedOptionParam structures specifying enforced options.
*
* @dev Provides a way for the OApp to enforce things like paying for PreCrime, AND/OR minimum dst lzReceive gas amounts etc.
* @dev These enforced options can vary as the potential options/execution on the remote may differ as per the msgType.
* eg. Amount of lzReceive() gas necessary to deliver a lzCompose() message adds overhead you dont want to pay
* if you are only making a standard LayerZero message ie. lzReceive() WITHOUT sendCompose().
*/
function _setEnforcedOptions(EnforcedOptionParam[] memory _enforcedOptions) internal virtual {
for (uint256 i = 0; i < _enforcedOptions.length; i++) {
// @dev Enforced options are only available for optionType 3, as type 1 and 2 dont support combining.
_assertOptionsType3(_enforcedOptions[i].options);
enforcedOptions[_enforcedOptions[i].eid][_enforcedOptions[i].msgType] = _enforcedOptions[i].options;
}
emit EnforcedOptionSet(_enforcedOptions);
}
/**
* @notice Combines options for a given endpoint and message type.
* @param _eid The endpoint ID.
* @param _msgType The OAPP message type.
* @param _extraOptions Additional options passed by the caller.
* @return options The combination of caller specified options AND enforced options.
*
* @dev If there is an enforced lzReceive option:
* - {gasLimit: 200k, msg.value: 1 ether} AND a caller supplies a lzReceive option: {gasLimit: 100k, msg.value: 0.5 ether}
* - The resulting options will be {gasLimit: 300k, msg.value: 1.5 ether} when the message is executed on the remote lzReceive() function.
* @dev This presence of duplicated options is handled off-chain in the verifier/executor.
*/
function combineOptions(
uint32 _eid,
uint16 _msgType,
bytes calldata _extraOptions
) public view virtual returns (bytes memory) {
bytes memory enforced = enforcedOptions[_eid][_msgType];
// No enforced options, pass whatever the caller supplied, even if it's empty or legacy type 1/2 options.
if (enforced.length == 0) return _extraOptions;
// No caller options, return enforced
if (_extraOptions.length == 0) return enforced;
// @dev If caller provided _extraOptions, must be type 3 as its the ONLY type that can be combined.
if (_extraOptions.length >= 2) {
_assertOptionsType3(_extraOptions);
// @dev Remove the first 2 bytes containing the type from the _extraOptions and combine with enforced.
return bytes.concat(enforced, _extraOptions[2:]);
}
// No valid set of options was found.
revert InvalidOptions(_extraOptions);
}
/**
* @dev Internal function to assert that options are of type 3.
* @param _options The options to be checked.
*/
function _assertOptionsType3(bytes memory _options) internal pure virtual {
uint16 optionsType;
assembly {
optionsType := mload(add(_options, 2))
}
if (optionsType != OPTION_TYPE_3) revert InvalidOptions(_options);
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
import { IPreCrime } from "./interfaces/IPreCrime.sol";
import { IOAppPreCrimeSimulator, InboundPacket, Origin } from "./interfaces/IOAppPreCrimeSimulator.sol";
/**
* @title OAppPreCrimeSimulator
* @dev Abstract contract serving as the base for preCrime simulation functionality in an OApp.
*/
abstract contract OAppPreCrimeSimulator is IOAppPreCrimeSimulator, Ownable {
// The address of the preCrime implementation.
address public preCrime;
/**
* @dev Retrieves the address of the OApp contract.
* @return The address of the OApp contract.
*
* @dev The simulator contract is the base contract for the OApp by default.
* @dev If the simulator is a separate contract, override this function.
*/
function oApp() external view virtual returns (address) {
return address(this);
}
/**
* @dev Sets the preCrime contract address.
* @param _preCrime The address of the preCrime contract.
*/
function setPreCrime(address _preCrime) public virtual onlyOwner {
preCrime = _preCrime;
emit PreCrimeSet(_preCrime);
}
/**
* @dev Interface for pre-crime simulations. Always reverts at the end with the simulation results.
* @param _packets An array of InboundPacket objects representing received packets to be delivered.
*
* @dev WARNING: MUST revert at the end with the simulation results.
* @dev Gives the preCrime implementation the ability to mock sending packets to the lzReceive function,
* WITHOUT actually executing them.
*/
function lzReceiveAndRevert(InboundPacket[] calldata _packets) public payable virtual {
for (uint256 i = 0; i < _packets.length; i++) {
InboundPacket calldata packet = _packets[i];
// Ignore packets that are not from trusted peers.
if (!isPeer(packet.origin.srcEid, packet.origin.sender)) continue;
// @dev Because a verifier is calling this function, it doesnt have access to executor params:
// - address _executor
// - bytes calldata _extraData
// preCrime will NOT work for OApps that rely on these two parameters inside of their _lzReceive().
// They are instead stubbed to default values, address(0) and bytes("")
// @dev Calling this.lzReceiveSimulate removes ability for assembly return 0 callstack exit,
// which would cause the revert to be ignored.
this.lzReceiveSimulate{ value: packet.value }(
packet.origin,
packet.guid,
packet.message,
packet.executor,
packet.extraData
);
}
// @dev Revert with the simulation results. msg.sender must implement IPreCrime.buildSimulationResult().
revert SimulationResult(IPreCrime(msg.sender).buildSimulationResult());
}
/**
* @dev Is effectively an internal function because msg.sender must be address(this).
* Allows resetting the call stack for 'internal' calls.
* @param _origin The origin information containing the source endpoint and sender address.
* - srcEid: The source chain endpoint ID.
* - sender: The sender address on the src chain.
* - nonce: The nonce of the message.
* @param _guid The unique identifier of the packet.
* @param _message The message payload of the packet.
* @param _executor The executor address for the packet.
* @param _extraData Additional data for the packet.
*/
function lzReceiveSimulate(
Origin calldata _origin,
bytes32 _guid,
bytes calldata _message,
address _executor,
bytes calldata _extraData
) external payable virtual {
// @dev Ensure ONLY can be called 'internally'.
if (msg.sender != address(this)) revert OnlySelf();
_lzReceiveSimulate(_origin, _guid, _message, _executor, _extraData);
}
/**
* @dev Internal function to handle the OAppPreCrimeSimulator simulated receive.
* @param _origin The origin information.
* - srcEid: The source chain endpoint ID.
* - sender: The sender address from the src chain.
* - nonce: The nonce of the LayerZero message.
* @param _guid The GUID of the LayerZero message.
* @param _message The LayerZero message.
* @param _executor The address of the off-chain executor.
* @param _extraData Arbitrary data passed by the msg executor.
*
* @dev Enables the preCrime simulator to mock sending lzReceive() messages,
* routes the msg down from the OAppPreCrimeSimulator, and back up to the OAppReceiver.
*/
function _lzReceiveSimulate(
Origin calldata _origin,
bytes32 _guid,
bytes calldata _message,
address _executor,
bytes calldata _extraData
) internal virtual;
/**
* @dev checks if the specified peer is considered 'trusted' by the OApp.
* @param _eid The endpoint Id to check.
* @param _peer The peer to check.
* @return Whether the peer passed is considered 'trusted' by the OApp.
*/
function isPeer(uint32 _eid, bytes32 _peer) public view virtual returns (bool);
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
// @dev Import the Origin so it's exposed to OAppPreCrimeSimulator implementers.
// solhint-disable-next-line no-unused-import
import { InboundPacket, Origin } from "../libs/Packet.sol";
/**
* @title IOAppPreCrimeSimulator Interface
* @dev Interface for the preCrime simulation functionality in an OApp.
*/
interface IOAppPreCrimeSimulator {
// @dev simulation result used in PreCrime implementation
error SimulationResult(bytes result);
error OnlySelf();
/**
* @dev Emitted when the preCrime contract address is set.
* @param preCrimeAddress The address of the preCrime contract.
*/
event PreCrimeSet(address preCrimeAddress);
/**
* @dev Retrieves the address of the preCrime contract implementation.
* @return The address of the preCrime contract.
*/
function preCrime() external view returns (address);
/**
* @dev Retrieves the address of the OApp contract.
* @return The address of the OApp contract.
*/
function oApp() external view returns (address);
/**
* @dev Sets the preCrime contract address.
* @param _preCrime The address of the preCrime contract.
*/
function setPreCrime(address _preCrime) external;
/**
* @dev Mocks receiving a packet, then reverts with a series of data to infer the state/result.
* @param _packets An array of LayerZero InboundPacket objects representing received packets.
*/
function lzReceiveAndRevert(InboundPacket[] calldata _packets) external payable;
/**
* @dev checks if the specified peer is considered 'trusted' by the OApp.
* @param _eid The endpoint Id to check.
* @param _peer The peer to check.
* @return Whether the peer passed is considered 'trusted' by the OApp.
*/
function isPeer(uint32 _eid, bytes32 _peer) external view returns (bool);
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
struct PreCrimePeer {
uint32 eid;
bytes32 preCrime;
bytes32 oApp;
}
// TODO not done yet
interface IPreCrime {
error OnlyOffChain();
// for simulate()
error PacketOversize(uint256 max, uint256 actual);
error PacketUnsorted();
error SimulationFailed(bytes reason);
// for preCrime()
error SimulationResultNotFound(uint32 eid);
error InvalidSimulationResult(uint32 eid, bytes reason);
error CrimeFound(bytes crime);
function getConfig(bytes[] calldata _packets, uint256[] calldata _packetMsgValues) external returns (bytes memory);
function simulate(
bytes[] calldata _packets,
uint256[] calldata _packetMsgValues
) external payable returns (bytes memory);
function buildSimulationResult() external view returns (bytes memory);
function preCrime(
bytes[] calldata _packets,
uint256[] calldata _packetMsgValues,
bytes[] calldata _simulations
) external;
function version() external view returns (uint64 major, uint8 minor);
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
import { Origin } from "@layerzerolabs/lz-evm-protocol-v2/contracts/interfaces/ILayerZeroEndpointV2.sol";
import { PacketV1Codec } from "@layerzerolabs/lz-evm-protocol-v2/contracts/messagelib/libs/PacketV1Codec.sol";
/**
* @title InboundPacket
* @dev Structure representing an inbound packet received by the contract.
*/
struct InboundPacket {
Origin origin; // Origin information of the packet.
uint32 dstEid; // Destination endpointId of the packet.
address receiver; // Receiver address for the packet.
bytes32 guid; // Unique identifier of the packet.
uint256 value; // msg.value of the packet.
address executor; // Executor address for the packet.
bytes message; // Message payload of the packet.
bytes extraData; // Additional arbitrary data for the packet.
}
/**
* @title PacketDecoder
* @dev Library for decoding LayerZero packets.
*/
library PacketDecoder {
using PacketV1Codec for bytes;
/**
* @dev Decode an inbound packet from the given packet data.
* @param _packet The packet data to decode.
* @return packet An InboundPacket struct representing the decoded packet.
*/
function decode(bytes calldata _packet) internal pure returns (InboundPacket memory packet) {
packet.origin = Origin(_packet.srcEid(), _packet.sender(), _packet.nonce());
packet.dstEid = _packet.dstEid();
packet.receiver = _packet.receiverB20();
packet.guid = _packet.guid();
packet.message = _packet.message();
}
/**
* @dev Decode multiple inbound packets from the given packet data and associated message values.
* @param _packets An array of packet data to decode.
* @param _packetMsgValues An array of associated message values for each packet.
* @return packets An array of InboundPacket structs representing the decoded packets.
*/
function decode(
bytes[] calldata _packets,
uint256[] memory _packetMsgValues
) internal pure returns (InboundPacket[] memory packets) {
packets = new InboundPacket[](_packets.length);
for (uint256 i = 0; i < _packets.length; i++) {
bytes calldata packet = _packets[i];
packets[i] = PacketDecoder.decode(packet);
// @dev Allows the verifier to specify the msg.value that gets passed in lzReceive.
packets[i].value = _packetMsgValues[i];
}
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
import { OApp, Origin } from "@layerzerolabs/oapp-evm/contracts/oapp/OApp.sol";
import { OAppOptionsType3 } from "@layerzerolabs/oapp-evm/contracts/oapp/libs/OAppOptionsType3.sol";
import { IOAppMsgInspector } from "@layerzerolabs/oapp-evm/contracts/oapp/interfaces/IOAppMsgInspector.sol";
import { OAppPreCrimeSimulator } from "@layerzerolabs/oapp-evm/contracts/precrime/OAppPreCrimeSimulator.sol";
import { IOFT, SendParam, OFTLimit, OFTReceipt, OFTFeeDetail, MessagingReceipt, MessagingFee } from "./interfaces/IOFT.sol";
import { OFTMsgCodec } from "./libs/OFTMsgCodec.sol";
import { OFTComposeMsgCodec } from "./libs/OFTComposeMsgCodec.sol";
/**
* @title OFTCore
* @dev Abstract contract for the OftChain (OFT) token.
*/
abstract contract OFTCore is IOFT, OApp, OAppPreCrimeSimulator, OAppOptionsType3 {
using OFTMsgCodec for bytes;
using OFTMsgCodec for bytes32;
// @notice Provides a conversion rate when swapping between denominations of SD and LD
// - shareDecimals == SD == shared Decimals
// - localDecimals == LD == local decimals
// @dev Considers that tokens have different decimal amounts on various chains.
// @dev eg.
// For a token
// - locally with 4 decimals --> 1.2345 => uint(12345)
// - remotely with 2 decimals --> 1.23 => uint(123)
// - The conversion rate would be 10 ** (4 - 2) = 100
// @dev If you want to send 1.2345 -> (uint 12345), you CANNOT represent that value on the remote,
// you can only display 1.23 -> uint(123).
// @dev To preserve the dust that would otherwise be lost on that conversion,
// we need to unify a denomination that can be represented on ALL chains inside of the OFT mesh
uint256 public immutable decimalConversionRate;
// @notice Msg types that are used to identify the various OFT operations.
// @dev This can be extended in child contracts for non-default oft operations
// @dev These values are used in things like combineOptions() in OAppOptionsType3.sol.
uint16 public constant SEND = 1;
uint16 public constant SEND_AND_CALL = 2;
// Address of an optional contract to inspect both 'message' and 'options'
address public msgInspector;
event MsgInspectorSet(address inspector);
/**
* @dev Constructor.
* @param _localDecimals The decimals of the token on the local chain (this chain).
* @param _endpoint The address of the LayerZero endpoint.
* @param _delegate The delegate capable of making OApp configurations inside of the endpoint.
*/
constructor(uint8 _localDecimals, address _endpoint, address _delegate) OApp(_endpoint, _delegate) {
if (_localDecimals < sharedDecimals()) revert InvalidLocalDecimals();
decimalConversionRate = 10 ** (_localDecimals - sharedDecimals());
}
/**
* @notice Retrieves interfaceID and the version of the OFT.
* @return interfaceId The interface ID.
* @return version The version.
*
* @dev interfaceId: This specific interface ID is '0x02e49c2c'.
* @dev version: Indicates a cross-chain compatible msg encoding with other OFTs.
* @dev If a new feature is added to the OFT cross-chain msg encoding, the version will be incremented.
* ie. localOFT version(x,1) CAN send messages to remoteOFT version(x,1)
*/
function oftVersion() external pure virtual returns (bytes4 interfaceId, uint64 version) {
return (type(IOFT).interfaceId, 1);
}
/**
* @dev Retrieves the shared decimals of the OFT.
* @return The shared decimals of the OFT.
*
* @dev Sets an implicit cap on the amount of tokens, over uint64.max() will need some sort of outbound cap / totalSupply cap
* Lowest common decimal denominator between chains.
* Defaults to 6 decimal places to provide up to 18,446,744,073,709.551615 units (max uint64).
* For tokens exceeding this totalSupply(), they will need to override the sharedDecimals function with something smaller.
* ie. 4 sharedDecimals would be 1,844,674,407,370,955.1615
*/
function sharedDecimals() public view virtual returns (uint8) {
return 6;
}
/**
* @dev Sets the message inspector address for the OFT.
* @param _msgInspector The address of the message inspector.
*
* @dev This is an optional contract that can be used to inspect both 'message' and 'options'.
* @dev Set it to address(0) to disable it, or set it to a contract address to enable it.
*/
function setMsgInspector(address _msgInspector) public virtual onlyOwner {
msgInspector = _msgInspector;
emit MsgInspectorSet(_msgInspector);
}
/**
* @notice Provides a quote for OFT-related operations.
* @param _sendParam The parameters for the send operation.
* @return oftLimit The OFT limit information.
* @return oftFeeDetails The details of OFT fees.
* @return oftReceipt The OFT receipt information.
*/
function quoteOFT(
SendParam calldata _sendParam
)
external
view
virtual
returns (OFTLimit memory oftLimit, OFTFeeDetail[] memory oftFeeDetails, OFTReceipt memory oftReceipt)
{
uint256 minAmountLD = 0; // Unused in the default implementation.
uint256 maxAmountLD = type(uint64).max; // Unused in the default implementation.
oftLimit = OFTLimit(minAmountLD, maxAmountLD);
// Unused in the default implementation; reserved for future complex fee details.
oftFeeDetails = new OFTFeeDetail[](0);
// @dev This is the same as the send() operation, but without the actual send.
// - amountSentLD is the amount in local decimals that would be sent from the sender.
// - amountReceivedLD is the amount in local decimals that will be credited to the recipient on the remote OFT instance.
// @dev The amountSentLD MIGHT not equal the amount the user actually receives. HOWEVER, the default does.
(uint256 amountSentLD, uint256 amountReceivedLD) = _debitView(
_sendParam.amountLD,
_sendParam.minAmountLD,
_sendParam.dstEid
);
oftReceipt = OFTReceipt(amountSentLD, amountReceivedLD);
}
/**
* @notice Provides a quote for the send() operation.
* @param _sendParam The parameters for the send() operation.
* @param _payInLzToken Flag indicating whether the caller is paying in the LZ token.
* @return msgFee The calculated LayerZero messaging fee from the send() operation.
*
* @dev MessagingFee: LayerZero msg fee
* - nativeFee: The native fee.
* - lzTokenFee: The lzToken fee.
*/
function quoteSend(
SendParam calldata _sendParam,
bool _payInLzToken
) external view virtual returns (MessagingFee memory msgFee) {
// @dev mock the amount to receive, this is the same operation used in the send().
// The quote is as similar as possible to the actual send() operation.
(, uint256 amountReceivedLD) = _debitView(_sendParam.amountLD, _sendParam.minAmountLD, _sendParam.dstEid);
// @dev Builds the options and OFT message to quote in the endpoint.
(bytes memory message, bytes memory options) = _buildMsgAndOptions(_sendParam, amountReceivedLD);
// @dev Calculates the LayerZero fee for the send() operation.
return _quote(_sendParam.dstEid, message, options, _payInLzToken);
}
/**
* @dev Executes the send operation.
* @param _sendParam The parameters for the send operation.
* @param _fee The calculated fee for the send() operation.
* - nativeFee: The native fee.
* - lzTokenFee: The lzToken fee.
* @param _refundAddress The address to receive any excess funds.
* @return msgReceipt The receipt for the send operation.
* @return oftReceipt The OFT receipt information.
*
* @dev MessagingReceipt: LayerZero msg receipt
* - guid: The unique identifier for the sent message.
* - nonce: The nonce of the sent message.
* - fee: The LayerZero fee incurred for the message.
*/
function send(
SendParam calldata _sendParam,
MessagingFee calldata _fee,
address _refundAddress
) external payable virtual returns (MessagingReceipt memory msgReceipt, OFTReceipt memory oftReceipt) {
// @dev Applies the token transfers regarding this send() operation.
// - amountSentLD is the amount in local decimals that was ACTUALLY sent/debited from the sender.
// - amountReceivedLD is the amount in local decimals that will be received/credited to the recipient on the remote OFT instance.
(uint256 amountSentLD, uint256 amountReceivedLD) = _debit(
msg.sender,
_sendParam.amountLD,
_sendParam.minAmountLD,
_sendParam.dstEid
);
// @dev Builds the options and OFT message to quote in the endpoint.
(bytes memory message, bytes memory options) = _buildMsgAndOptions(_sendParam, amountReceivedLD);
// @dev Sends the message to the LayerZero endpoint and returns the LayerZero msg receipt.
msgReceipt = _lzSend(_sendParam.dstEid, message, options, _fee, _refundAddress);
// @dev Formulate the OFT receipt.
oftReceipt = OFTReceipt(amountSentLD, amountReceivedLD);
emit OFTSent(msgReceipt.guid, _sendParam.dstEid, msg.sender, amountSentLD, amountReceivedLD);
}
/**
* @dev Internal function to build the message and options.
* @param _sendParam The parameters for the send() operation.
* @param _amountLD The amount in local decimals.
* @return message The encoded message.
* @return options The encoded options.
*/
function _buildMsgAndOptions(
SendParam calldata _sendParam,
uint256 _amountLD
) internal view virtual returns (bytes memory message, bytes memory options) {
bool hasCompose;
// @dev This generated message has the msg.sender encoded into the payload so the remote knows who the caller is.
(message, hasCompose) = OFTMsgCodec.encode(
_sendParam.to,
_toSD(_amountLD),
// @dev Must be include a non empty bytes if you want to compose, EVEN if you dont need it on the remote.
// EVEN if you dont require an arbitrary payload to be sent... eg. '0x01'
_sendParam.composeMsg
);
// @dev Change the msg type depending if its composed or not.
uint16 msgType = hasCompose ? SEND_AND_CALL : SEND;
// @dev Combine the callers _extraOptions with the enforced options via the OAppOptionsType3.
options = combineOptions(_sendParam.dstEid, msgType, _sendParam.extraOptions);
// @dev Optionally inspect the message and options depending if the OApp owner has set a msg inspector.
// @dev If it fails inspection, needs to revert in the implementation. ie. does not rely on return boolean
address inspector = msgInspector; // caches the msgInspector to avoid potential double storage read
if (inspector != address(0)) IOAppMsgInspector(inspector).inspect(message, options);
}
/**
* @dev Internal function to handle the receive on the LayerZero endpoint.
* @param _origin The origin information.
* - srcEid: The source chain endpoint ID.
* - sender: The sender address from the src chain.
* - nonce: The nonce of the LayerZero message.
* @param _guid The unique identifier for the received LayerZero message.
* @param _message The encoded message.
* @dev _executor The address of the executor.
* @dev _extraData Additional data.
*/
function _lzReceive(
Origin calldata _origin,
bytes32 _guid,
bytes calldata _message,
address /*_executor*/, // @dev unused in the default implementation.
bytes calldata /*_extraData*/ // @dev unused in the default implementation.
) internal virtual override {
// @dev The src sending chain doesnt know the address length on this chain (potentially non-evm)
// Thus everything is bytes32() encoded in flight.
address toAddress = _message.sendTo().bytes32ToAddress();
// @dev Credit the amountLD to the recipient and return the ACTUAL amount the recipient received in local decimals
uint256 amountReceivedLD = _credit(toAddress, _toLD(_message.amountSD()), _origin.srcEid);
if (_message.isComposed()) {
// @dev Proprietary composeMsg format for the OFT.
bytes memory composeMsg = OFTComposeMsgCodec.encode(
_origin.nonce,
_origin.srcEid,
amountReceivedLD,
_message.composeMsg()
);
// @dev Stores the lzCompose payload that will be executed in a separate tx.
// Standardizes functionality for executing arbitrary contract invocation on some non-evm chains.
// @dev The off-chain executor will listen and process the msg based on the src-chain-callers compose options passed.
// @dev The index is used when a OApp needs to compose multiple msgs on lzReceive.
// For default OFT implementation there is only 1 compose msg per lzReceive, thus its always 0.
endpoint.sendCompose(toAddress, _guid, 0 /* the index of the composed message*/, composeMsg);
}
emit OFTReceived(_guid, _origin.srcEid, toAddress, amountReceivedLD);
}
/**
* @dev Internal function to handle the OAppPreCrimeSimulator simulated receive.
* @param _origin The origin information.
* - srcEid: The source chain endpoint ID.
* - sender: The sender address from the src chain.
* - nonce: The nonce of the LayerZero message.
* @param _guid The unique identifier for the received LayerZero message.
* @param _message The LayerZero message.
* @param _executor The address of the off-chain executor.
* @param _extraData Arbitrary data passed by the msg executor.
*
* @dev Enables the preCrime simulator to mock sending lzReceive() messages,
* routes the msg down from the OAppPreCrimeSimulator, and back up to the OAppReceiver.
*/
function _lzReceiveSimulate(
Origin calldata _origin,
bytes32 _guid,
bytes calldata _message,
address _executor,
bytes calldata _extraData
) internal virtual override {
_lzReceive(_origin, _guid, _message, _executor, _extraData);
}
/**
* @dev Check if the peer is considered 'trusted' by the OApp.
* @param _eid The endpoint ID to check.
* @param _peer The peer to check.
* @return Whether the peer passed is considered 'trusted' by the OApp.
*
* @dev Enables OAppPreCrimeSimulator to check whether a potential Inbound Packet is from a trusted source.
*/
function isPeer(uint32 _eid, bytes32 _peer) public view virtual override returns (bool) {
return peers[_eid] == _peer;
}
/**
* @dev Internal function to remove dust from the given local decimal amount.
* @param _amountLD The amount in local decimals.
* @return amountLD The amount after removing dust.
*
* @dev Prevents the loss of dust when moving amounts between chains with different decimals.
* @dev eg. uint(123) with a conversion rate of 100 becomes uint(100).
*/
function _removeDust(uint256 _amountLD) internal view virtual returns (uint256 amountLD) {
return (_amountLD / decimalConversionRate) * decimalConversionRate;
}
/**
* @dev Internal function to convert an amount from shared decimals into local decimals.
* @param _amountSD The amount in shared decimals.
* @return amountLD The amount in local decimals.
*/
function _toLD(uint64 _amountSD) internal view virtual returns (uint256 amountLD) {
return _amountSD * decimalConversionRate;
}
/**
* @dev Internal function to convert an amount from local decimals into shared decimals.
* @param _amountLD The amount in local decimals.
* @return amountSD The amount in shared decimals.
*/
function _toSD(uint256 _amountLD) internal view virtual returns (uint64 amountSD) {
return uint64(_amountLD / decimalConversionRate);
}
/**
* @dev Internal function to mock the amount mutation from a OFT debit() operation.
* @param _amountLD The amount to send in local decimals.
* @param _minAmountLD The minimum amount to send in local decimals.
* @dev _dstEid The destination endpoint ID.
* @return amountSentLD The amount sent, in local decimals.
* @return amountReceivedLD The amount to be received on the remote chain, in local decimals.
*
* @dev This is where things like fees would be calculated and deducted from the amount to be received on the remote.
*/
function _debitView(
uint256 _amountLD,
uint256 _minAmountLD,
uint32 /*_dstEid*/
) internal view virtual returns (uint256 amountSentLD, uint256 amountReceivedLD) {
// @dev Remove the dust so nothing is lost on the conversion between chains with different decimals for the token.
amountSentLD = _removeDust(_amountLD);
// @dev The amount to send is the same as amount received in the default implementation.
amountReceivedLD = amountSentLD;
// @dev Check for slippage.
if (amountReceivedLD < _minAmountLD) {
revert SlippageExceeded(amountReceivedLD, _minAmountLD);
}
}
/**
* @dev Internal function to perform a debit operation.
* @param _from The address to debit.
* @param _amountLD The amount to send in local decimals.
* @param _minAmountLD The minimum amount to send in local decimals.
* @param _dstEid The destination endpoint ID.
* @return amountSentLD The amount sent in local decimals.
* @return amountReceivedLD The amount received in local decimals on the remote.
*
* @dev Defined here but are intended to be overriden depending on the OFT implementation.
* @dev Depending on OFT implementation the _amountLD could differ from the amountReceivedLD.
*/
function _debit(
address _from,
uint256 _amountLD,
uint256 _minAmountLD,
uint32 _dstEid
) internal virtual returns (uint256 amountSentLD, uint256 amountReceivedLD);
/**
* @dev Internal function to perform a credit operation.
* @param _to The address to credit.
* @param _amountLD The amount to credit in local decimals.
* @param _srcEid The source endpoint ID.
* @return amountReceivedLD The amount ACTUALLY received in local decimals.
*
* @dev Defined here but are intended to be overriden depending on the OFT implementation.
* @dev Depending on OFT implementation the _amountLD could differ from the amountReceivedLD.
*/
function _credit(
address _to,
uint256 _amountLD,
uint32 _srcEid
) internal virtual returns (uint256 amountReceivedLD);
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
import { MessagingReceipt, MessagingFee } from "@layerzerolabs/oapp-evm/contracts/oapp/OAppSender.sol";
/**
* @dev Struct representing token parameters for the OFT send() operation.
*/
struct SendParam {
uint32 dstEid; // Destination endpoint ID.
bytes32 to; // Recipient address.
uint256 amountLD; // Amount to send in local decimals.
uint256 minAmountLD; // Minimum amount to send in local decimals.
bytes extraOptions; // Additional options supplied by the caller to be used in the LayerZero message.
bytes composeMsg; // The composed message for the send() operation.
bytes oftCmd; // The OFT command to be executed, unused in default OFT implementations.
}
/**
* @dev Struct representing OFT limit information.
* @dev These amounts can change dynamically and are up the specific oft implementation.
*/
struct OFTLimit {
uint256 minAmountLD; // Minimum amount in local decimals that can be sent to the recipient.
uint256 maxAmountLD; // Maximum amount in local decimals that can be sent to the recipient.
}
/**
* @dev Struct representing OFT receipt information.
*/
struct OFTReceipt {
uint256 amountSentLD; // Amount of tokens ACTUALLY debited from the sender in local decimals.
// @dev In non-default implementations, the amountReceivedLD COULD differ from this value.
uint256 amountReceivedLD; // Amount of tokens to be received on the remote side.
}
/**
* @dev Struct representing OFT fee details.
* @dev Future proof mechanism to provide a standardized way to communicate fees to things like a UI.
*/
struct OFTFeeDetail {
int256 feeAmountLD; // Amount of the fee in local decimals.
string description; // Description of the fee.
}
/**
* @title IOFT
* @dev Interface for the OftChain (OFT) token.
* @dev Does not inherit ERC20 to accommodate usage by OFTAdapter as well.
* @dev This specific interface ID is '0x02e49c2c'.
*/
interface IOFT {
// Custom error messages
error InvalidLocalDecimals();
error SlippageExceeded(uint256 amountLD, uint256 minAmountLD);
// Events
event OFTSent(
bytes32 indexed guid, // GUID of the OFT message.
uint32 dstEid, // Destination Endpoint ID.
address indexed fromAddress, // Address of the sender on the src chain.
uint256 amountSentLD, // Amount of tokens sent in local decimals.
uint256 amountReceivedLD // Amount of tokens received in local decimals.
);
event OFTReceived(
bytes32 indexed guid, // GUID of the OFT message.
uint32 srcEid, // Source Endpoint ID.
address indexed toAddress, // Address of the recipient on the dst chain.
uint256 amountReceivedLD // Amount of tokens received in local decimals.
);
/**
* @notice Retrieves interfaceID and the version of the OFT.
* @return interfaceId The interface ID.
* @return version The version.
*
* @dev interfaceId: This specific interface ID is '0x02e49c2c'.
* @dev version: Indicates a cross-chain compatible msg encoding with other OFTs.
* @dev If a new feature is added to the OFT cross-chain msg encoding, the version will be incremented.
* ie. localOFT version(x,1) CAN send messages to remoteOFT version(x,1)
*/
function oftVersion() external view returns (bytes4 interfaceId, uint64 version);
/**
* @notice Retrieves the address of the token associated with the OFT.
* @return token The address of the ERC20 token implementation.
*/
function token() external view returns (address);
/**
* @notice Indicates whether the OFT contract requires approval of the 'token()' to send.
* @return requiresApproval Needs approval of the underlying token implementation.
*
* @dev Allows things like wallet implementers to determine integration requirements,
* without understanding the underlying token implementation.
*/
function approvalRequired() external view returns (bool);
/**
* @notice Retrieves the shared decimals of the OFT.
* @return sharedDecimals The shared decimals of the OFT.
*/
function sharedDecimals() external view returns (uint8);
/**
* @notice Provides a quote for OFT-related operations.
* @param _sendParam The parameters for the send operation.
* @return limit The OFT limit information.
* @return oftFeeDetails The details of OFT fees.
* @return receipt The OFT receipt information.
*/
function quoteOFT(
SendParam calldata _sendParam
) external view returns (OFTLimit memory, OFTFeeDetail[] memory oftFeeDetails, OFTReceipt memory);
/**
* @notice Provides a quote for the send() operation.
* @param _sendParam The parameters for the send() operation.
* @param _payInLzToken Flag indicating whether the caller is paying in the LZ token.
* @return fee The calculated LayerZero messaging fee from the send() operation.
*
* @dev MessagingFee: LayerZero msg fee
* - nativeFee: The native fee.
* - lzTokenFee: The lzToken fee.
*/
function quoteSend(SendParam calldata _sendParam, bool _payInLzToken) external view returns (MessagingFee memory);
/**
* @notice Executes the send() operation.
* @param _sendParam The parameters for the send operation.
* @param _fee The fee information supplied by the caller.
* - nativeFee: The native fee.
* - lzTokenFee: The lzToken fee.
* @param _refundAddress The address to receive any excess funds from fees etc. on the src.
* @return receipt The LayerZero messaging receipt from the send() operation.
* @return oftReceipt The OFT receipt information.
*
* @dev MessagingReceipt: LayerZero msg receipt
* - guid: The unique identifier for the sent message.
* - nonce: The nonce of the sent message.
* - fee: The LayerZero fee incurred for the message.
*/
function send(
SendParam calldata _sendParam,
MessagingFee calldata _fee,
address _refundAddress
) external payable returns (MessagingReceipt memory, OFTReceipt memory);
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
library OFTComposeMsgCodec {
// Offset constants for decoding composed messages
uint8 private constant NONCE_OFFSET = 8;
uint8 private constant SRC_EID_OFFSET = 12;
uint8 private constant AMOUNT_LD_OFFSET = 44;
uint8 private constant COMPOSE_FROM_OFFSET = 76;
/**
* @dev Encodes a OFT composed message.
* @param _nonce The nonce value.
* @param _srcEid The source endpoint ID.
* @param _amountLD The amount in local decimals.
* @param _composeMsg The composed message.
* @return _msg The encoded Composed message.
*/
function encode(
uint64 _nonce,
uint32 _srcEid,
uint256 _amountLD,
bytes memory _composeMsg // 0x[composeFrom][composeMsg]
) internal pure returns (bytes memory _msg) {
_msg = abi.encodePacked(_nonce, _srcEid, _amountLD, _composeMsg);
}
/**
* @dev Retrieves the nonce for the composed message.
* @param _msg The message.
* @return The nonce value.
*/
function nonce(bytes calldata _msg) internal pure returns (uint64) {
return uint64(bytes8(_msg[:NONCE_OFFSET]));
}
/**
* @dev Retrieves the source endpoint ID for the composed message.
* @param _msg The message.
* @return The source endpoint ID.
*/
function srcEid(bytes calldata _msg) internal pure returns (uint32) {
return uint32(bytes4(_msg[NONCE_OFFSET:SRC_EID_OFFSET]));
}
/**
* @dev Retrieves the amount in local decimals from the composed message.
* @param _msg The message.
* @return The amount in local decimals.
*/
function amountLD(bytes calldata _msg) internal pure returns (uint256) {
return uint256(bytes32(_msg[SRC_EID_OFFSET:AMOUNT_LD_OFFSET]));
}
/**
* @dev Retrieves the composeFrom value from the composed message.
* @param _msg The message.
* @return The composeFrom value.
*/
function composeFrom(bytes calldata _msg) internal pure returns (bytes32) {
return bytes32(_msg[AMOUNT_LD_OFFSET:COMPOSE_FROM_OFFSET]);
}
/**
* @dev Retrieves the composed message.
* @param _msg The message.
* @return The composed message.
*/
function composeMsg(bytes calldata _msg) internal pure returns (bytes memory) {
return _msg[COMPOSE_FROM_OFFSET:];
}
/**
* @dev Converts an address to bytes32.
* @param _addr The address to convert.
* @return The bytes32 representation of the address.
*/
function addressToBytes32(address _addr) internal pure returns (bytes32) {
return bytes32(uint256(uint160(_addr)));
}
/**
* @dev Converts bytes32 to an address.
* @param _b The bytes32 value to convert.
* @return The address representation of bytes32.
*/
function bytes32ToAddress(bytes32 _b) internal pure returns (address) {
return address(uint160(uint256(_b)));
}
}// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
library OFTMsgCodec {
// Offset constants for encoding and decoding OFT messages
uint8 private constant SEND_TO_OFFSET = 32;
uint8 private constant SEND_AMOUNT_SD_OFFSET = 40;
/**
* @dev Encodes an OFT LayerZero message.
* @param _sendTo The recipient address.
* @param _amountShared The amount in shared decimals.
* @param _composeMsg The composed message.
* @return _msg The encoded message.
* @return hasCompose A boolean indicating whether the message has a composed payload.
*/
function encode(
bytes32 _sendTo,
uint64 _amountShared,
bytes memory _composeMsg
) internal view returns (bytes memory _msg, bool hasCompose) {
hasCompose = _composeMsg.length > 0;
// @dev Remote chains will want to know the composed function caller ie. msg.sender on the src.
_msg = hasCompose
? abi.encodePacked(_sendTo, _amountShared, addressToBytes32(msg.sender), _composeMsg)
: abi.encodePacked(_sendTo, _amountShared);
}
/**
* @dev Checks if the OFT message is composed.
* @param _msg The OFT message.
* @return A boolean indicating whether the message is composed.
*/
function isComposed(bytes calldata _msg) internal pure returns (bool) {
return _msg.length > SEND_AMOUNT_SD_OFFSET;
}
/**
* @dev Retrieves the recipient address from the OFT message.
* @param _msg The OFT message.
* @return The recipient address.
*/
function sendTo(bytes calldata _msg) internal pure returns (bytes32) {
return bytes32(_msg[:SEND_TO_OFFSET]);
}
/**
* @dev Retrieves the amount in shared decimals from the OFT message.
* @param _msg The OFT message.
* @return The amount in shared decimals.
*/
function amountSD(bytes calldata _msg) internal pure returns (uint64) {
return uint64(bytes8(_msg[SEND_TO_OFFSET:SEND_AMOUNT_SD_OFFSET]));
}
/**
* @dev Retrieves the composed message from the OFT message.
* @param _msg The OFT message.
* @return The composed message.
*/
function composeMsg(bytes calldata _msg) internal pure returns (bytes memory) {
return _msg[SEND_AMOUNT_SD_OFFSET:];
}
/**
* @dev Converts an address to bytes32.
* @param _addr The address to convert.
* @return The bytes32 representation of the address.
*/
function addressToBytes32(address _addr) internal pure returns (bytes32) {
return bytes32(uint256(uint160(_addr)));
}
/**
* @dev Converts bytes32 to an address.
* @param _b The bytes32 value to convert.
* @return The address representation of bytes32.
*/
function bytes32ToAddress(bytes32 _b) internal pure returns (address) {
return address(uint160(uint256(_b)));
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (access/Ownable.sol)
pragma solidity ^0.8.20;
import {Context} from "../utils/Context.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* The initial owner is set to the address provided by the deployer. This can
* later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract Ownable is Context {
address private _owner;
/**
* @dev The caller account is not authorized to perform an operation.
*/
error OwnableUnauthorizedAccount(address account);
/**
* @dev The owner is not a valid owner account. (eg. `address(0)`)
*/
error OwnableInvalidOwner(address owner);
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the address provided by the deployer as the initial owner.
*/
constructor(address initialOwner) {
if (initialOwner == address(0)) {
revert OwnableInvalidOwner(address(0));
}
_transferOwnership(initialOwner);
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
_checkOwner();
_;
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if the sender is not the owner.
*/
function _checkOwner() internal view virtual {
if (owner() != _msgSender()) {
revert OwnableUnauthorizedAccount(_msgSender());
}
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby disabling any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
if (newOwner == address(0)) {
revert OwnableInvalidOwner(address(0));
}
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.20;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
/**
* @dev Returns the value of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the value of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves a `value` amount of tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 value) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets a `value` amount of tokens as the allowance of `spender` over the
* caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 value) external returns (bool);
/**
* @dev Moves a `value` amount of tokens from `from` to `to` using the
* allowance mechanism. `value` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 value) external returns (bool);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Permit.sol)
pragma solidity ^0.8.20;
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*
* ==== Security Considerations
*
* There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
* expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
* considered as an intention to spend the allowance in any specific way. The second is that because permits have
* built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
* take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
* generally recommended is:
*
* ```solidity
* function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
* try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
* doThing(..., value);
* }
*
* function doThing(..., uint256 value) public {
* token.safeTransferFrom(msg.sender, address(this), value);
* ...
* }
* ```
*
* Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
* `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
* {SafeERC20-safeTransferFrom}).
*
* Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
* contracts should have entry points that don't rely on permit.
*/
interface IERC20Permit {
/**
* @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
* given ``owner``'s signed approval.
*
* IMPORTANT: The same issues {IERC20-approve} has related to transaction
* ordering also apply here.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `deadline` must be a timestamp in the future.
* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
* over the EIP712-formatted function arguments.
* - the signature must use ``owner``'s current nonce (see {nonces}).
*
* For more information on the signature format, see the
* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
* section].
*
* CAUTION: See Security Considerations above.
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @dev Returns the current nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
/**
* @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.20;
import {IERC20} from "../IERC20.sol";
import {IERC20Permit} from "../extensions/IERC20Permit.sol";
import {Address} from "../../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
/**
* @dev An operation with an ERC20 token failed.
*/
error SafeERC20FailedOperation(address token);
/**
* @dev Indicates a failed `decreaseAllowance` request.
*/
error SafeERC20FailedDecreaseAllowance(address spender, uint256 currentAllowance, uint256 requestedDecrease);
/**
* @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*/
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeCall(token.transfer, (to, value)));
}
/**
* @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the
* calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.
*/
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeCall(token.transferFrom, (from, to, value)));
}
/**
* @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful.
*/
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 oldAllowance = token.allowance(address(this), spender);
forceApprove(token, spender, oldAllowance + value);
}
/**
* @dev Decrease the calling contract's allowance toward `spender` by `requestedDecrease`. If `token` returns no
* value, non-reverting calls are assumed to be successful.
*/
function safeDecreaseAllowance(IERC20 token, address spender, uint256 requestedDecrease) internal {
unchecked {
uint256 currentAllowance = token.allowance(address(this), spender);
if (currentAllowance < requestedDecrease) {
revert SafeERC20FailedDecreaseAllowance(spender, currentAllowance, requestedDecrease);
}
forceApprove(token, spender, currentAllowance - requestedDecrease);
}
}
/**
* @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,
* non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval
* to be set to zero before setting it to a non-zero value, such as USDT.
*/
function forceApprove(IERC20 token, address spender, uint256 value) internal {
bytes memory approvalCall = abi.encodeCall(token.approve, (spender, value));
if (!_callOptionalReturnBool(token, approvalCall)) {
_callOptionalReturn(token, abi.encodeCall(token.approve, (spender, 0)));
_callOptionalReturn(token, approvalCall);
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data);
if (returndata.length != 0 && !abi.decode(returndata, (bool))) {
revert SafeERC20FailedOperation(address(token));
}
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*
* This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.
*/
function _callOptionalReturnBool(IERC20 token, bytes memory data) private returns (bool) {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false
// and not revert is the subcall reverts.
(bool success, bytes memory returndata) = address(token).call(data);
return success && (returndata.length == 0 || abi.decode(returndata, (bool))) && address(token).code.length > 0;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Address.sol)
pragma solidity ^0.8.20;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev The ETH balance of the account is not enough to perform the operation.
*/
error AddressInsufficientBalance(address account);
/**
* @dev There's no code at `target` (it is not a contract).
*/
error AddressEmptyCode(address target);
/**
* @dev A call to an address target failed. The target may have reverted.
*/
error FailedInnerCall();
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.8.20/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
if (address(this).balance < amount) {
revert AddressInsufficientBalance(address(this));
}
(bool success, ) = recipient.call{value: amount}("");
if (!success) {
revert FailedInnerCall();
}
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason or custom error, it is bubbled
* up by this function (like regular Solidity function calls). However, if
* the call reverted with no returned reason, this function reverts with a
* {FailedInnerCall} error.
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
if (address(this).balance < value) {
revert AddressInsufficientBalance(address(this));
}
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, success, returndata);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, success, returndata);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and reverts if the target
* was not a contract or bubbling up the revert reason (falling back to {FailedInnerCall}) in case of an
* unsuccessful call.
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata
) internal view returns (bytes memory) {
if (!success) {
_revert(returndata);
} else {
// only check if target is a contract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
if (returndata.length == 0 && target.code.length == 0) {
revert AddressEmptyCode(target);
}
return returndata;
}
}
/**
* @dev Tool to verify that a low level call was successful, and reverts if it wasn't, either by bubbling the
* revert reason or with a default {FailedInnerCall} error.
*/
function verifyCallResult(bool success, bytes memory returndata) internal pure returns (bytes memory) {
if (!success) {
_revert(returndata);
} else {
return returndata;
}
}
/**
* @dev Reverts with returndata if present. Otherwise reverts with {FailedInnerCall}.
*/
function _revert(bytes memory returndata) private pure {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert FailedInnerCall();
}
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.1) (utils/Context.sol)
pragma solidity ^0.8.20;
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
function _contextSuffixLength() internal view virtual returns (uint256) {
return 0;
}
}// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/IERC165.sol)
pragma solidity ^0.8.20;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}{
"detectMissingLibraries": false,
"enableEraVMExtensions": false,
"evmVersion": "shanghai",
"forceEVMLA": false,
"libraries": {},
"metadata": {},
"optimizer": {
"disable_system_request_memoization": true,
"enabled": true,
"fallback_to_optimizing_for_size": false,
"mode": "3"
},
"outputSelection": {
"*": {
"*": [
"abi"
]
}
},
"remappings": [
"ds-test/=node_modules/@layerzerolabs/toolbox-foundry/lib/ds-test/",
"forge-std/=node_modules/@layerzerolabs/toolbox-foundry/lib/forge-std/",
"@layerzerolabs/=node_modules/@layerzerolabs/",
"@openzeppelin/=node_modules/@openzeppelin/",
"dn404-adjustable/=lib/dn404-adjustable/src/",
"solady/=lib/dn404-adjustable/lib/solady/src/",
"hardhat-deploy/=node_modules/hardhat-deploy/",
"hardhat/=node_modules/hardhat/",
"murky/=lib/dn404-adjustable/lib/murky/",
"openzeppelin-contracts/=lib/dn404-adjustable/lib/murky/lib/openzeppelin-contracts/",
"solidity-bytes-utils/=node_modules/solidity-bytes-utils/"
],
"viaIR": false
}Contract Security Audit
- No Contract Security Audit Submitted- Submit Audit Here
Contract ABI
API[{"inputs":[{"internalType":"uint96","name":"_tokensPerNft","type":"uint96"},{"internalType":"address","name":"_lzEndpoint","type":"address"},{"internalType":"address","name":"_delegate","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"target","type":"address"}],"name":"AddressEmptyCode","type":"error"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"AddressInsufficientBalance","type":"error"},{"inputs":[],"name":"ApprovalCallerNotOwnerNorApproved","type":"error"},{"inputs":[],"name":"DNAlreadyInitialized","type":"error"},{"inputs":[],"name":"FailedInnerCall","type":"error"},{"inputs":[],"name":"InsufficientAllowance","type":"error"},{"inputs":[],"name":"InsufficientBalance","type":"error"},{"inputs":[],"name":"InvalidDelegate","type":"error"},{"inputs":[],"name":"InvalidEndpointCall","type":"error"},{"inputs":[],"name":"InvalidLocalDecimals","type":"error"},{"inputs":[{"internalType":"bytes","name":"options","type":"bytes"}],"name":"InvalidOptions","type":"error"},{"inputs":[],"name":"LinkMirrorContractFailed","type":"error"},{"inputs":[],"name":"LzTokenUnavailable","type":"error"},{"inputs":[],"name":"MirrorAddressIsZero","type":"error"},{"inputs":[{"internalType":"uint32","name":"eid","type":"uint32"}],"name":"NoPeer","type":"error"},{"inputs":[{"internalType":"uint256","name":"msgValue","type":"uint256"}],"name":"NotEnoughNative","type":"error"},{"inputs":[{"internalType":"address","name":"addr","type":"address"}],"name":"OnlyEndpoint","type":"error"},{"inputs":[{"internalType":"uint32","name":"eid","type":"uint32"},{"internalType":"bytes32","name":"sender","type":"bytes32"}],"name":"OnlyPeer","type":"error"},{"inputs":[],"name":"OnlySelf","type":"error"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"OwnableInvalidOwner","type":"error"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"OwnableUnauthorizedAccount","type":"error"},{"inputs":[{"internalType":"address","name":"token","type":"address"}],"name":"SafeERC20FailedOperation","type":"error"},{"inputs":[],"name":"SenderNotMirror","type":"error"},{"inputs":[{"internalType":"bytes","name":"result","type":"bytes"}],"name":"SimulationResult","type":"error"},{"inputs":[{"internalType":"uint256","name":"amountLD","type":"uint256"},{"internalType":"uint256","name":"minAmountLD","type":"uint256"}],"name":"SlippageExceeded","type":"error"},{"inputs":[],"name":"TokenDoesNotExist","type":"error"},{"inputs":[],"name":"TotalSupplyOverflow","type":"error"},{"inputs":[],"name":"TransferCallerNotOwnerNorApproved","type":"error"},{"inputs":[],"name":"TransferFromIncorrectOwner","type":"error"},{"inputs":[],"name":"TransferToZeroAddress","type":"error"},{"inputs":[],"name":"ZeroTokensPerNft","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"components":[{"internalType":"uint32","name":"eid","type":"uint32"},{"internalType":"uint16","name":"msgType","type":"uint16"},{"internalType":"bytes","name":"options","type":"bytes"}],"indexed":false,"internalType":"struct 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Origin","name":"origin","type":"tuple"}],"name":"allowInitializePath","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"address","name":"spender","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"approvalRequired","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint32","name":"_eid","type":"uint32"},{"internalType":"uint16","name":"_msgType","type":"uint16"},{"internalType":"bytes","name":"_extraOptions","type":"bytes"}],"name":"combineOptions","outputs":[{"internalType":"bytes","name":"","type":"bytes"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimalConversionRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint8","name":"","type":"uint8"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"endpoint","outputs":[{"internalType":"contract ILayerZeroEndpointV2","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint32","name":"eid","type":"uint32"},{"internalType":"uint16","name":"msgType","type":"uint16"}],"name":"enforcedOptions","outputs":[{"internalType":"bytes","name":"enforcedOption","type":"bytes"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"a","type":"address"}],"name":"getSkipNFT","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"uint32","name":"srcEid","type":"uint32"},{"internalType":"bytes32","name":"sender","type":"bytes32"},{"internalType":"uint64","name":"nonce","type":"uint64"}],"internalType":"struct Origin","name":"","type":"tuple"},{"internalType":"bytes","name":"","type":"bytes"},{"internalType":"address","name":"_sender","type":"address"}],"name":"isComposeMsgSender","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint32","name":"_eid","type":"uint32"},{"internalType":"bytes32","name":"_peer","type":"bytes32"}],"name":"isPeer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"uint32","name":"srcEid","type":"uint32"},{"internalType":"bytes32","name":"sender","type":"bytes32"},{"internalType":"uint64","name":"nonce","type":"uint64"}],"internalType":"struct Origin","name":"_origin","type":"tuple"},{"internalType":"bytes32","name":"_guid","type":"bytes32"},{"internalType":"bytes","name":"_message","type":"bytes"},{"internalType":"address","name":"_executor","type":"address"},{"internalType":"bytes","name":"_extraData","type":"bytes"}],"name":"lzReceive","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"components":[{"components":[{"internalType":"uint32","name":"srcEid","type":"uint32"},{"internalType":"bytes32","name":"sender","type":"bytes32"},{"internalType":"uint64","name":"nonce","type":"uint64"}],"internalType":"struct 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Origin","name":"_origin","type":"tuple"},{"internalType":"bytes32","name":"_guid","type":"bytes32"},{"internalType":"bytes","name":"_message","type":"bytes"},{"internalType":"address","name":"_executor","type":"address"},{"internalType":"bytes","name":"_extraData","type":"bytes"}],"name":"lzReceiveSimulate","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"mirror","outputs":[{"internalType":"contract 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MessagingFee","name":"msgFee","type":"tuple"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"internalType":"uint32","name":"dstEid","type":"uint32"},{"internalType":"bytes32","name":"to","type":"bytes32"},{"internalType":"uint256","name":"amountLD","type":"uint256"},{"internalType":"uint256","name":"minAmountLD","type":"uint256"},{"internalType":"bytes","name":"extraOptions","type":"bytes"},{"internalType":"bytes","name":"composeMsg","type":"bytes"},{"internalType":"bytes","name":"oftCmd","type":"bytes"}],"internalType":"struct SendParam","name":"_sendParam","type":"tuple"},{"components":[{"internalType":"uint256","name":"nativeFee","type":"uint256"},{"internalType":"uint256","name":"lzTokenFee","type":"uint256"}],"internalType":"struct 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Creation Code
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Deployed Bytecode
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000000000000000000000000000000000000000186a0000000000000000000000000d07c30af3ff30d96bdc9c6044958230eb797ddbf00000000000000000000000021af1185734d213d45c6236146fb81e2b0e8b821
-----Decoded View---------------
Arg [0] : _tokensPerNft (uint96): 100000
Arg [1] : _lzEndpoint (address): 0xd07C30aF3Ff30D96BDc9c6044958230Eb797DDBF
Arg [2] : _delegate (address): 0x21aF1185734D213D45C6236146fb81E2b0E8b821
-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 00000000000000000000000000000000000000000000000000000000000186a0
Arg [1] : 000000000000000000000000d07c30af3ff30d96bdc9c6044958230eb797ddbf
Arg [2] : 00000000000000000000000021af1185734d213d45c6236146fb81e2b0e8b821
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