fix: handle fee on transfer tokens in balancer v3 gateway

Gearbox-protocol · Feb 15, 2025 · 03f50da · 03f50da
1 parent f0f4a92
commit 03f50da
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/contracts/helpers/balancer/BalancerV3RouterGateway.sol b/contracts/helpers/balancer/BalancerV3RouterGateway.sol
@@ -37,7 +37,12 @@ contract BalancerV3RouterGateway is IBalancerV3Router {
         bool wethIsEth,
         bytes calldata userData
     ) external returns (uint256 amountOut) {
+        uint256 balanceBefore = tokenIn.balanceOf(address(this));
+
         tokenIn.safeTransferFrom(msg.sender, address(this), exactAmountIn);
+
+        exactAmountIn = tokenIn.balanceOf(address(this)) - balanceBefore;
+
         tokenIn.forceApprove(permit2, exactAmountIn);
         IPermit2(permit2).approve(address(tokenIn), balancerV3Router, uint160(exactAmountIn), uint48(block.timestamp));