28 lines
1.2 KiB
Solidity
28 lines
1.2 KiB
Solidity
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// SPDX-License-Identifier: GPL-2.0-or-later
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pragma solidity >=0.5.0;
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/// @title Interface for permit
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/// @notice Interface used by DAI/CHAI for permit
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interface IERC20PermitAllowed {
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/// @notice Approve the spender to spend some tokens via the holder signature
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/// @dev This is the permit interface used by DAI and CHAI
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/// @param holder The address of the token holder, the token owner
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/// @param spender The address of the token spender
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/// @param nonce The holder's nonce, increases at each call to permit
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/// @param expiry The timestamp at which the permit is no longer valid
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/// @param allowed Boolean that sets approval amount, true for type(uint256).max and false for 0
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/// @param v Must produce valid secp256k1 signature from the holder along with `r` and `s`
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/// @param r Must produce valid secp256k1 signature from the holder along with `v` and `s`
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/// @param s Must produce valid secp256k1 signature from the holder along with `r` and `v`
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function permit(
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address holder,
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address spender,
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uint256 nonce,
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uint256 expiry,
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bool allowed,
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uint8 v,
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bytes32 r,
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bytes32 s
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) external;
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}
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