V2TypeGeneric

Git Source

Inherits: ERC20Selectors, Masks

Title: Uniswap V2 type swapper contract

We do everything UniV2 here, incl Solidly, FoT, exactIn and -Out

State Variables

UNI_V2_GET_RESERVES

selector for getReserves()

bytes32 private constant UNI_V2_GET_RESERVES = 0x0902f1ac00000000000000000000000000000000000000000000000000000000

UNI_V2_SWAP

selector for swap(...)

bytes32 private constant UNI_V2_SWAP = 0x022c0d9f00000000000000000000000000000000000000000000000000000000

PERMIT2_TRANSFER_FROM

fixed selector transferFrom(...) on permit2

bytes32 private constant PERMIT2_TRANSFER_FROM = 0x36c7851600000000000000000000000000000000000000000000000000000000

PERMIT2

deterministically deployed pemrit2 address

address private constant PERMIT2 = 0x000000000022D473030F116dDEE9F6B43aC78BA3

Functions

_swapUniswapV2PoolExactInGeneric

Swaps exact input on Uniswap V2 type pools

Supports Uni V2, Solidly, FoT, exactIn. Pay mode: 0 = pay from self; 1 = caller pays; 3 = pre-funded.

Note: calldata-offset-table:

function _swapUniswapV2PoolExactInGeneric(
    uint256 amountIn,
    address tokenIn,
    address tokenOut,
    address receiver,
    uint256 currentOffset,
    address callerAddress
)
    internal
    returns (
        uint256 buyAmount,
        // we need this as transient variable to not overflow the stacksize
        // the clLength is the calldata length for the callback at the beginning
        // and willl be used as the new incremented offset
        // this is to prevent `stack too deep` without using additional `mstore`
        uint256 clLength
    );

Parameters

Returns

_swapUniV2ExactInFOTGeneric

Executes an exact input swap internally across major UniV2 forks supporting FOT tokens. Will only be used at the begining of a swap path where users sell a FOT token Due to the nature of the V2 impleemntation, the callback is not triggered if no calldata is provided As such, we never enter the callback implementation when using this function

function _swapUniV2ExactInFOTGeneric(
    uint256 amountIn,
    address tokenIn,
    address tokenOut,
    address receiver,
    uint256 currentOffset,
    address callerAddress
)
    internal
    returns (uint256 buyAmount, uint256);

Parameters

Returns