Interface for permit
Interface used by DAI/CHAI for permit
function permit(address holder, address spender, uint256 nonce, uint256 expiry, bool allowed, uint8 v, bytes32 r, bytes32 s) external external
Approve the spender to spend some tokens via the holder signature Developer note: This is the permit interface used by DAI and CHAI
| Name | Type | Description |
|---|---|---|
holder
address
The address of the token holder, the token owner
spender
address
The address of the token spender
nonce
uint256
The holder's nonce, increases at each call to permit
expiry
uint256
The timestamp at which the permit is no longer valid
allowed
bool
Boolean that sets approval amount, true for type(uint256).max and false for 0
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`
