# ISelfPermit

Self Permit

Functionality to call permit on any EIP-2612-compliant token for use in the route

## Functions

### selfPermit

`function selfPermit(address token, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external payable` payable external

Permits this contract to spend a given token from \`msg.sender\` *Developer note: The \`owner\` is always msg.sender and the \`spender\` is always address(this).*

| Name     | Type    | Description                                                                       |
| -------- | ------- | --------------------------------------------------------------------------------- |
| token    | address | The address of the token spent                                                    |
| value    | uint256 | The amount that can be spent of token                                             |
| deadline | uint256 | A timestamp, the current blocktime must be less than or equal to this timestamp   |
| v        | uint8   | Must produce valid secp256k1 signature from the holder along with \`r\` and \`s\` |
| r        | bytes32 | Must produce valid secp256k1 signature from the holder along with \`v\` and \`s\` |
| s        | bytes32 | Must produce valid secp256k1 signature from the holder along with \`r\` and \`v\` |

### selfPermitIfNecessary

`function selfPermitIfNecessary(address token, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) external payable` payable external

Permits this contract to spend a given token from \`msg.sender\` *Developer note: The \`owner\` is always msg.sender and the \`spender\` is always address(this). Can be used instead of #selfPermit to prevent calls from failing due to a frontrun of a call to #selfPermit*

| Name     | Type    | Description                                                                       |
| -------- | ------- | --------------------------------------------------------------------------------- |
| token    | address | The address of the token spent                                                    |
| value    | uint256 | The amount that can be spent of token                                             |
| deadline | uint256 | A timestamp, the current blocktime must be less than or equal to this timestamp   |
| v        | uint8   | Must produce valid secp256k1 signature from the holder along with \`r\` and \`s\` |
| r        | bytes32 | Must produce valid secp256k1 signature from the holder along with \`v\` and \`s\` |
| s        | bytes32 | Must produce valid secp256k1 signature from the holder along with \`r\` and \`v\` |

### selfPermitAllowed

`function selfPermitAllowed(address token, uint256 nonce, uint256 expiry, uint8 v, bytes32 r, bytes32 s) external payable` payable external

Permits this contract to spend the sender's tokens for permit signatures that have the \`allowed\` parameter *Developer note: The \`owner\` is always msg.sender and the \`spender\` is always address(this)*

| Name   | Type    | Description                                                                       |
| ------ | ------- | --------------------------------------------------------------------------------- |
| token  | address | The address of the token spent                                                    |
| nonce  | uint256 | The current nonce of the owner                                                    |
| expiry | uint256 | The timestamp at which the permit is no longer valid                              |
| v      | uint8   | Must produce valid secp256k1 signature from the holder along with \`r\` and \`s\` |
| r      | bytes32 | Must produce valid secp256k1 signature from the holder along with \`v\` and \`s\` |
| s      | bytes32 | Must produce valid secp256k1 signature from the holder along with \`r\` and \`v\` |

### selfPermitAllowedIfNecessary

`function selfPermitAllowedIfNecessary(address token, uint256 nonce, uint256 expiry, uint8 v, bytes32 r, bytes32 s) external payable` payable external

Permits this contract to spend the sender's tokens for permit signatures that have the \`allowed\` parameter *Developer note: The \`owner\` is always msg.sender and the \`spender\` is always address(this) Can be used instead of #selfPermitAllowed to prevent calls from failing due to a frontrun of a call to #selfPermitAllowed.*

| Name   | Type    | Description                                                                       |
| ------ | ------- | --------------------------------------------------------------------------------- |
| token  | address | The address of the token spent                                                    |
| nonce  | uint256 | The current nonce of the owner                                                    |
| expiry | uint256 | The timestamp at which the permit is no longer valid                              |
| v      | uint8   | Must produce valid secp256k1 signature from the holder along with \`r\` and \`s\` |
| r      | bytes32 | Must produce valid secp256k1 signature from the holder along with \`v\` and \`s\` |
| s      | bytes32 | Must produce valid secp256k1 signature from the holder along with \`r\` and \`v\` |