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| // SPDX-FileCopyrightText: 2024 OpenZeppelin, Lido <info@lido.fi> | ||
| // SPDX-License-Identifier: GPL-3.0 | ||
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| pragma solidity 0.8.10; | ||
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| import {ERC20Bridged} from "./ERC20Bridged.sol"; | ||
| import {ERC20Permit} from "./ERC20Permit.sol"; | ||
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| contract ERC20BridgedPermit is ERC20Bridged, ERC20Permit { | ||
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| /// @param name_ The name of the token | ||
| /// @param symbol_ The symbol of the token | ||
| /// @param version_ The current major version of the signing domain (aka token version) | ||
| /// @param decimals_ The decimals places of the token | ||
| /// @param bridge_ The bridge address which allowd to mint/burn tokens | ||
| constructor( | ||
| string memory name_, | ||
| string memory symbol_, | ||
| string memory version_, | ||
| uint8 decimals_, | ||
| address bridge_ | ||
| ) | ||
| ERC20Bridged(name_, symbol_, decimals_, bridge_) | ||
| ERC20Permit(name_, version_) | ||
| { | ||
| } | ||
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| function _permitAccepted( | ||
| address owner_, | ||
| address spender_, | ||
| uint256 amount_ | ||
| ) internal override { | ||
| _approve(owner_, spender_, amount_); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,107 @@ | ||
| // SPDX-FileCopyrightText: 2024 OpenZeppelin, Lido <info@lido.fi> | ||
| // SPDX-License-Identifier: GPL-3.0 | ||
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| pragma solidity 0.8.10; | ||
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| import {UnstructuredStorage} from "./UnstructuredStorage.sol"; | ||
| import {EIP712} from "@openzeppelin/contracts-v4.9/utils/cryptography/EIP712.sol"; | ||
| import {IERC2612} from "@openzeppelin/contracts-v4.9/interfaces/IERC2612.sol"; | ||
| import {SignatureChecker} from "../lib/SignatureChecker.sol"; | ||
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| contract ERC20Permit is IERC2612, EIP712 { | ||
| using UnstructuredStorage for bytes32; | ||
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| /** | ||
| * @dev Nonces for ERC-2612 (Permit) | ||
| */ | ||
| mapping(address => uint256) internal noncesByAddress; | ||
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| // TODO: outline structured storage used because at least EIP712 uses it | ||
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| /** | ||
| * @dev Typehash constant for ERC-2612 (Permit) | ||
| * | ||
| * keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)") | ||
| */ | ||
| bytes32 internal constant PERMIT_TYPEHASH = | ||
| 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9; | ||
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| /// @param name_ The name of the token | ||
| /// @param version_ The current major version of the signing domain (aka token version) | ||
| constructor( | ||
| string memory name_, | ||
| string memory version_ | ||
| ) EIP712(name_, version_) | ||
| { | ||
| } | ||
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| /** | ||
| * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens, | ||
| * given ``owner``'s signed approval. | ||
| * 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}). | ||
| */ | ||
| function permit( | ||
| address _owner, address _spender, uint256 _value, uint256 _deadline, uint8 _v, bytes32 _r, bytes32 _s | ||
| ) external { | ||
| if (block.timestamp > _deadline) { | ||
| revert ErrorDeadlineExpired(); | ||
| } | ||
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| bytes32 structHash = keccak256( | ||
| abi.encode(PERMIT_TYPEHASH, _owner, _spender, _value, _useNonce(_owner), _deadline) | ||
| ); | ||
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| bytes32 hash = _hashTypedDataV4(structHash); | ||
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| if (!SignatureChecker.isValidSignatureNow(_owner, hash, _v, _r, _s)) { | ||
| revert ErrorInvalidSignature(); | ||
| } | ||
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| _permitAccepted(_owner, _spender, _value); | ||
| } | ||
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| function _permitAccepted( | ||
| address owner_, | ||
| address spender_, | ||
| uint256 amount_ | ||
| ) internal virtual { | ||
| } | ||
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| /** | ||
| * @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) { | ||
| return noncesByAddress[owner]; | ||
| } | ||
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| /** | ||
| * @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) { | ||
| return _domainSeparatorV4(); | ||
| } | ||
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| /** | ||
| * @dev "Consume a nonce": return the current value and increment. | ||
| */ | ||
| function _useNonce(address _owner) internal returns (uint256 current) { | ||
| current = noncesByAddress[_owner]; | ||
| noncesByAddress[_owner] = current + 1; | ||
| } | ||
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| error ErrorInvalidSignature(); | ||
| error ErrorDeadlineExpired(); | ||
| } |
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