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Merge pull request #7 from manifoldfinance/fix/amountOut-edge
Fix/amount out edge
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| Original file line number | Diff line number | Diff line change |
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| /// SPDX-License-Identifier: UNLICENSED | ||
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| pragma solidity >=0.8.13 <0.9.0; | ||
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| import "forge-std/Test.sol"; | ||
| import { Vm } from "forge-std/Vm.sol"; | ||
| import { MevEthRouter } from "../src/MevEthRouter.sol"; | ||
| import { IUniswapV2Pair } from "../src/interfaces/IUniswapV2Pair.sol"; | ||
| import { IWETH } from "../src/interfaces/IWETH.sol"; | ||
| import { IMevEth } from "../src/interfaces/IMevEth.sol"; | ||
| import { IMevEthRouter } from "../src/interfaces/IMevEthRouter.sol"; | ||
| import { ERC20 } from "solmate/tokens/ERC20.sol"; | ||
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| /// @title MevEthRouter2Test use different fork for cross check | ||
| contract MevEthRouter2Test is DSTest { | ||
| using stdStorage for StdStorage; | ||
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| string RPC_ETH_MAINNET = vm.envString("RPC_MAINNET"); | ||
| uint256 FORK_ID; | ||
| StdStorage stdstore; | ||
| Vm internal constant vm = Vm(HEVM_ADDRESS); | ||
| MevEthRouter router; | ||
| address WETH = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2; | ||
| IMevEth internal constant MEVETH = IMevEth(0x24Ae2dA0f361AA4BE46b48EB19C91e02c5e4f27E); | ||
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| IWETH weth = IWETH(WETH); | ||
| uint256 minLiquidity = uint256(1000); | ||
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| function setUp() public { | ||
| FORK_ID = vm.createSelectFork(RPC_ETH_MAINNET); | ||
| router = new MevEthRouter(0x617c8dE5BdE54ffbb8d92716CC947858cA38f582); | ||
| } | ||
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| function writeTokenBalance(address who, address token, uint256 amt) internal { | ||
| stdstore.target(token).sig(ERC20(token).balanceOf.selector).with_key(who).checked_write(amt); | ||
| } | ||
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| receive() external payable { } | ||
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| /// @dev Fuzz test amountOut, Stake and redeem | ||
| function testStakeAndRedeem(uint80 amountIn) external { | ||
| vm.assume(amountIn > 0.1 ether); | ||
| vm.assume(amountIn < 100_000 ether); | ||
| vm.deal(address(this), amountIn); | ||
| // test getting swap route | ||
| bytes memory input = abi.encodeWithSelector(router.amountOutStake.selector, amountIn); | ||
| (, bytes memory data) = address(router).staticcall(input); | ||
| (uint256 amountOut, IMevEthRouter.Swap memory swaps) = abi.decode(data, (uint256, IMevEthRouter.Swap)); | ||
| assertGt(amountOut, MEVETH.previewDeposit(amountIn) * 999 / 1000); | ||
| // test stake | ||
| uint256 shares = router.stakeEthForMevEth{ value: amountIn }(address(this), amountIn, amountOut * 99 / 100, block.timestamp, swaps); | ||
| assertGt(shares, amountOut * 99 / 100); | ||
| // test redeem route | ||
| bool useQueue; | ||
| if (amountIn > 15 ether) { | ||
| useQueue = true; | ||
| } | ||
| input = abi.encodeWithSelector(router.amountOutRedeem.selector, useQueue, shares); | ||
| (, data) = address(router).staticcall(input); | ||
| (amountOut, swaps) = abi.decode(data, (uint256, IMevEthRouter.Swap)); | ||
| assertGt(amountOut, MEVETH.previewRedeem(shares) * 95 / 100); | ||
| // test redeem | ||
| ERC20(address(MEVETH)).approve(address(router), shares); | ||
| uint256 assets = router.redeemMevEthForEth(useQueue, address(this), shares, amountOut * 99 / 100, block.timestamp, swaps); | ||
| assertGt(assets, 0); | ||
| } | ||
| } |