BalancerV2Swapper

Git Source

Inherits: ERC20Selectors, Masks

Title: Balancer V2 swapper contract that uses Symmetric's vault

Balancer V2 is fun (mostly)

State Variables

BALANCER_SWAP

Balancer's single swap function

bytes32 private constant BALANCER_SWAP = 0x52bbbe2900000000000000000000000000000000000000000000000000000000

Functions

_swapBalancerV2ExactIn

Swaps exact input on Balancer V2

Pay flag: 0 = caller pays; 1 = contract pays; greater = pre-funded

Note: calldata-offset-table:

Offset Length (bytes) Description
0 32 pool
32 20 vault
52 1 pay flag <- 0: caller pays; 1: contract pays; greater: pre-funded 
function _swapBalancerV2ExactIn(
    address tokenIn,
    address tokenOut,
    uint256 amountIn,
    address receiver,
    address callerAddress,
    uint256 currentOffset //
)
    internal
    returns (uint256 amountOut, uint256 balancerData);

Parameters

Name Type Description
tokenIn address Input token address
tokenOut address Output token address
amountIn uint256 Input amount
receiver address Receiver address
callerAddress address Address of the caller
currentOffset uint256 Current position in the calldata

Returns

Name Type Description
amountOut uint256 Output amount
balancerData uint256 Updated calldata offset after processing

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