PermitUtils

Git Source

Inherits: PermitConstants

Title: PermitUtils

A contract containing utilities for Permits

Functions

constructor

constructor() ;

_tryPermit

The function attempts to call the permit function on a given ERC20 token.

The function is designed to support a variety of permit functions, namely: IERC20Permit, IDaiLikePermit, and IPermit2. It accommodates both Compact and Full formats of these permit types. Please note, it is expected that the expiration parameter for the compact Permit2 and the deadline parameter for the compact Permit are to be incremented by one before invoking this function. This approach is motivated by gas efficiency considerations; as the unlimited expiration period is likely to be the most common scenario, and zeros are cheaper to pass in terms of gas cost. Thus, callers should increment the expiration or deadline by one before invocation for optimized performance. Note that the implementation does not perform dirty bits cleaning, so it is the responsibility of the caller to make sure that the higher 96 bits of the owner and spender parameters are clean.

function _tryPermit(address token, uint256 permitOffset, uint256 permitLength, address callerAddress) internal;

Parameters

_tryCreditPermit

Executes credit delegation on given tokens / lenders Note that for lenders like Aave V3, the token needs to be the respective debt token and NOT the underlying Others like compound will not use it at all.

function _tryCreditPermit(address token, uint256 permitOffset, uint256 permitLength, address callerAddress) internal;

Parameters

_tryFlagBasedLendingPermit

Executes compound or morpho permit.

function _tryFlagBasedLendingPermit(
    address target,
    uint256 permitOffset,
    uint256 permitLength,
    address callerAddress
)
    internal;

Parameters

_transferFromPermit2

transferERC20from version using permit2

function _transferFromPermit2(address token, address to, uint256 amount, address callerAddress) internal;

Errors

SafePermitBadLength

error SafePermitBadLength();