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December 11, 2025 10:06
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Forge Script - Balancer V3 Swap To Native
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| // SPDX-License-Identifier: MIT | |
| pragma solidity ^0.8.22; | |
| import "forge-std/Script.sol"; | |
| import {console} from "forge-std/console.sol"; | |
| import {IRouter} from "@balancer-v3-monorepo/interfaces/vault/IRouter.sol"; | |
| import {IERC20} from "@openzeppelin/contracts/interfaces/IERC20.sol"; | |
| import {IPermit2} from "@permit2/interfaces/IPermit2.sol"; | |
| // forge script --chain mainnet script/SwapSingleToEth.s.sol:SwapSingleToEth --rpc-url http://localhost:8545 -vvvv | |
| // Add --broadcast to actually send the transaction | |
| contract SwapSingleToEth is Script { | |
| // Balancer Router | |
| IRouter public constant router = IRouter(0x3f170631ed9821Ca51A59D996aB095162438DC10); | |
| IPermit2 public constant permit2 = IPermit2(0x000000000022D473030F116dDEE9F6B43aC78BA3); | |
| // Pool to swap against | |
| address public constant pool = 0x7b4c560f33A71A9f7a500aF3C4c65b46fBBafdB7; | |
| IERC20 usdc = IERC20(0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913); | |
| IERC20 weth = IERC20(0x4200000000000000000000000000000000000006); | |
| function run() public returns (uint256) { | |
| // Add .env in root with PRIVATE_KEY | |
| uint256 deployerPrivateKey = vm.envUint("PRIVATE_KEY"); | |
| vm.startBroadcast(deployerPrivateKey); | |
| usdc.approve(address(permit2), 10e6); | |
| console.log(usdc.balanceOf(address(0xdf330Ccb1d8fE97D176850BC127D0101cBe4e932))); | |
| console.log(weth.balanceOf(address(0xdf330Ccb1d8fE97D176850BC127D0101cBe4e932))); | |
| console.log(address(0xdf330Ccb1d8fE97D176850BC127D0101cBe4e932).balance); | |
| permit2.approve(address(usdc), address(router), type(uint160).max, type(uint48).max); | |
| router.swapSingleTokenExactIn(pool, usdc, weth, 1000000, 0, type(uint256).max, true, bytes("")); | |
| console.log(usdc.balanceOf(address(0xdf330Ccb1d8fE97D176850BC127D0101cBe4e932))); | |
| console.log(weth.balanceOf(address(0xdf330Ccb1d8fE97D176850BC127D0101cBe4e932))); | |
| console.log(address(0xdf330Ccb1d8fE97D176850BC127D0101cBe4e932).balance); | |
| vm.stopBroadcast(); | |
| return 0; | |
| } | |
| } |
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