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import ECDSA, ERC2771, ERC20, MerkleProofLib from @openzeppelin

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hueso
2025-10-16 14:38:49 -03:00
parent 407ea51d6a
commit f56335d9b5
9 changed files with 15 additions and 234 deletions
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87
contracts/lib/metatx/ERC2771Context.sol
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@@ -1,87 +0,0 @@
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.4;
/// @author OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
/// (https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Context.sol)
/// @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;
}
}
/// @author Modified from OpenZeppelin Contracts (last updated v4.7.0) (metatx/ERC2771Context.sol)
/// https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/metatx/ERC2771Context.sol
/// @dev Context variant with ERC2771 support.
abstract contract ERC2771Context is Context {
// address private immutable _trustedForwarder;
mapping(address => bool) public trustedForwarders;
/// @custom:oz-upgrades-unsafe-allow constructor
// constructor(address trustedForwarder) {
// _trustedForwarder = trustedForwarder;
// }
function _msgSender()
internal
view
virtual
override
returns (address sender)
{
if (trustedForwarders[msg.sender]) {
// The assembly code is more direct than the Solidity version using `abi.decode`.
/// @solidity memory-safe-assembly
assembly {
sender := shr(
96,
calldataload(sub(calldatasize(), 20))
)
}
} else {
return super._msgSender();
}
}
function isTrustedForwarder(address forwarder) public view virtual returns (bool) {
return trustedForwarders[forwarder];
}
function _msgData()
internal
view
virtual
override
returns (bytes calldata)
{
if (isTrustedForwarder(msg.sender)) {
return msg.data[:msg.data.length - 20];
} else {
return super._msgData();
}
}
}

95
contracts/lib/utils/ECDSA.sol
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@@ -1,95 +0,0 @@
// SPDX-License-Identifier: MIT
pragma solidity >=0.8.4;
/// @notice Gas optimized ECDSA wrapper.
/// @author Solady (https://github.com/vectorized/solady/blob/main/src/utils/ECDSA.sol)
/// @author Modified from Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/ECDSA.sol)
/// @author Modified from OpenZeppelin (https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/cryptography/ECDSA.sol)
library ECDSA {
/// @dev The signature is invalid.
error InvalidSignature();
/// @dev The number which `s` must not exceed in order for
/// the signature to be non-malleable.
bytes32 private constant _MALLEABILITY_THRESHOLD =
0x7fffffffffffffffffffffffffffffff5d576e7357a4501ddfe92f46681b20a0;
/// @dev Recovers the signer's address from a message digest `hash`,
/// and the `signature`.
///
/// This function does NOT accept EIP-2098 short form signatures.
/// Use `recover(bytes32 hash, bytes32 r, bytes32 vs)` for EIP-2098
/// short form signatures instead.
function recoverCalldata(
bytes32 hash,
bytes calldata signature
) internal view returns (address result) {
/// @solidity memory-safe-assembly
assembly {
// Copy the free memory pointer so that we can restore it later.
let m := mload(0x40)
// Directly copy `r` and `s` from the calldata.
calldatacopy(0x40, signature.offset, 0x40)
// Store the `hash` in the scratch space.
mstore(0x00, hash)
// Compute `v` and store it in the scratch space.
mstore(
0x20,
byte(
0,
calldataload(add(signature.offset, 0x40))
)
)
pop(
staticcall(
gas(), // Amount of gas left for the transaction.
and(
// If the signature is exactly 65 bytes in length.
eq(signature.length, 65),
// If `s` in lower half order, such that the signature is not malleable.
lt(
mload(0x60),
add(_MALLEABILITY_THRESHOLD, 1)
)
), // Address of `ecrecover`.
0x00, // Start of input.
0x80, // Size of input.
0x00, // Start of output.
0x20 // Size of output.
)
)
result := mload(0x00)
// `returndatasize()` will be `0x20` upon success, and `0x00` otherwise.
if iszero(returndatasize()) {
// Store the function selector of `InvalidSignature()`.
mstore(0x00, 0x8baa579f)
// Revert with (offset, size).
revert(0x1c, 0x04)
}
// Restore the zero slot.
mstore(0x60, 0)
// Restore the free memory pointer.
mstore(0x40, m)
}
}
/// @dev Returns an Ethereum Signed Message, created from a `hash`.
/// This produces a hash corresponding to the one signed with the
/// [`eth_sign`](https://eth.wiki/json-rpc/API#eth_sign)
/// JSON-RPC method as part of EIP-191.
function toEthSignedMessageHash(
bytes32 hash
) internal pure returns (bytes32 result) {
/// @solidity memory-safe-assembly
assembly {
// Store into scratch space for keccak256.
mstore(0x20, hash)
mstore(
0x00,
"\x00\x00\x00\x00\x19Ethereum Signed Message:\n32"
)
// 0x40 - 0x04 = 0x3c
result := keccak256(0x04, 0x3c)
}
}
}