Merge pull request #12 from propeller-heads/feature/etherfi-adapter
Etherfi adapter
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pistomat
395
evm/test/EtherfiAdapter.t.sol
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395
evm/test/EtherfiAdapter.t.sol
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// SPDX-License-Identifier: AGPL-3.0-or-later
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pragma solidity ^0.8.13;
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import "forge-std/Test.sol";
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import "openzeppelin-contracts/contracts/interfaces/IERC20.sol";
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import "src/interfaces/ISwapAdapterTypes.sol";
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import "src/libraries/FractionMath.sol";
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import "src/etherfi/EtherfiAdapter.sol";
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contract EtherfiAdapterTest is Test, ISwapAdapterTypes {
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using FractionMath for Fraction;
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EtherfiAdapter adapter;
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IWeEth weEth = IWeEth(0xCd5fE23C85820F7B72D0926FC9b05b43E359b7ee);
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IeEth eEth;
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uint256 constant TEST_ITERATIONS = 100;
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function setUp() public {
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uint256 forkBlock = 19218495;
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vm.createSelectFork(vm.rpcUrl("mainnet"), forkBlock);
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adapter = new EtherfiAdapter(address(weEth));
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eEth = weEth.eETH();
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vm.label(address(weEth), "WeETH");
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vm.label(address(eEth), "eETH");
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}
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receive() external payable {}
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function testPriceFuzzEtherfi(uint256 amount0, uint256 amount1) public {
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bytes32 pair = bytes32(0);
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uint256[] memory limits = adapter.getLimits(
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pair, IERC20(address(weEth)), IERC20(address(eEth))
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);
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vm.assume(amount0 < limits[0] && amount0 > 0);
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vm.assume(amount1 < limits[1] && amount1 > 0);
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uint256[] memory amounts = new uint256[](2);
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amounts[0] = amount0;
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amounts[1] = amount1;
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Fraction[] memory prices = adapter.price(
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pair, IERC20(address(weEth)), IERC20(address(eEth)), amounts
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);
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for (uint256 i = 0; i < prices.length; i++) {
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assertGt(prices[i].numerator, 0);
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assertGt(prices[i].denominator, 0);
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}
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}
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function testSwapFuzzEtherfiEethWeEth(uint256 specifiedAmount, bool isBuy)
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public
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{
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OrderSide side = isBuy ? OrderSide.Buy : OrderSide.Sell;
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IERC20 eEth_ = IERC20(address(eEth));
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IERC20 weEth_ = IERC20(address(weEth));
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bytes32 pair = bytes32(0);
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uint256[] memory limits = adapter.getLimits(pair, eEth_, weEth_);
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if (side == OrderSide.Buy) {
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vm.assume(specifiedAmount < limits[1] && specifiedAmount > 100);
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/// @dev workaround for eETH "deal", as standard ERC20 does not
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/// work(balance is shares)
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deal(address(adapter), type(uint256).max);
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adapter.swap(
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pair, IERC20(address(0)), eEth_, OrderSide.Buy, limits[0]
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);
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eEth_.approve(address(adapter), type(uint256).max);
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} else {
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vm.assume(specifiedAmount < limits[0] && specifiedAmount > 100);
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/// @dev workaround for eETH "deal", as standard ERC20 does not
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/// work(balance is shares)
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deal(address(adapter), type(uint128).max);
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adapter.swap(
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pair, IERC20(address(0)), eEth_, OrderSide.Buy, specifiedAmount
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);
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eEth_.approve(address(adapter), specifiedAmount);
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}
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uint256 eEth_balance = eEth_.balanceOf(address(this));
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uint256 weEth_balance = weEth_.balanceOf(address(this));
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Trade memory trade =
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adapter.swap(pair, eEth_, weEth_, side, specifiedAmount);
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if (trade.calculatedAmount > 0) {
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if (side == OrderSide.Buy) {
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assertGe(
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weEth_.balanceOf(address(this)) - weEth_balance,
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specifiedAmount - 2
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);
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/// @dev Transfer function contains rounding errors because of
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/// rewards in weETH contract, therefore we assume a +/-2
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/// tolerance
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assertLe(
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weEth_.balanceOf(address(this)) - weEth_balance,
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specifiedAmount
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);
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assertLe(
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eEth_balance - eEth_.balanceOf(address(this)),
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trade.calculatedAmount + 2
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);
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assertGe(
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eEth_balance - eEth_.balanceOf(address(this)),
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trade.calculatedAmount - 1
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);
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} else {
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assertGe(
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specifiedAmount,
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eEth_balance - eEth_.balanceOf(address(this))
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);
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/// @dev Transfer function contains rounding errors because of
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/// rewards in eETH contract, therefore we assume a +/-2
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/// tolerance
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assertLe(
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specifiedAmount - 2,
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eEth_balance - eEth_.balanceOf(address(this))
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);
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assertEq(
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trade.calculatedAmount,
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weEth_.balanceOf(address(this)) - weEth_balance
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);
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}
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}
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}
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function testSwapFuzzEtherfiWeEthEeth(uint256 specifiedAmount, bool isBuy)
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public
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{
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OrderSide side = isBuy ? OrderSide.Buy : OrderSide.Sell;
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IERC20 eEth_ = IERC20(address(eEth));
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IERC20 weEth_ = IERC20(address(weEth));
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uint256 weEth_bal_before = weEth_.balanceOf(address(this));
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bytes32 pair = bytes32(0);
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uint256[] memory limits = adapter.getLimits(pair, weEth_, eEth_);
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if (side == OrderSide.Buy) {
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vm.assume(specifiedAmount < limits[1] && specifiedAmount > 100);
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/// @dev workaround for eETH "deal", as standard ERC20 does not
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/// work(balance is shares)
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deal(address(adapter), type(uint256).max);
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adapter.swap(
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pair, IERC20(address(0)), weEth_, OrderSide.Buy, limits[0]
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);
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weEth_.approve(address(adapter), type(uint256).max);
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} else {
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vm.assume(specifiedAmount < limits[0] && specifiedAmount > 100);
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/// @dev workaround for eETH "deal", as standard ERC20 does not
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/// work(balance is shares)
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deal(address(adapter), type(uint128).max);
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adapter.swap(
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pair, IERC20(address(0)), weEth_, OrderSide.Buy, specifiedAmount
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);
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weEth_.approve(address(adapter), specifiedAmount);
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}
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uint256 eEth_balance = eEth_.balanceOf(address(this));
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uint256 weEth_balance = weEth_.balanceOf(address(this));
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/// @dev as of rounding errors in Etherfi, specifiedAmount might lose
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/// small digits for small numbers
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/// therefore we use weEth_balance - weEth_bal_before as specifiedAmount
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uint256 realAmountWeEth_ = weEth_balance - weEth_bal_before;
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Trade memory trade =
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adapter.swap(pair, weEth_, eEth_, side, realAmountWeEth_);
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if (trade.calculatedAmount > 0) {
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if (side == OrderSide.Buy) {
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assertGe(
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realAmountWeEth_,
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eEth_.balanceOf(address(this)) - eEth_balance
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);
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/// @dev Transfer function contains rounding errors because of
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/// rewards in weETH contract, therefore we assume a +/-2
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/// tolerance
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assertLe(
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realAmountWeEth_ - 2,
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eEth_.balanceOf(address(this)) - eEth_balance
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);
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assertLe(
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trade.calculatedAmount - 2,
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weEth_balance - weEth_.balanceOf(address(this))
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);
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} else {
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assertEq(
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realAmountWeEth_,
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weEth_balance - weEth_.balanceOf(address(this))
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);
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assertLe(
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trade.calculatedAmount - 2,
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eEth_.balanceOf(address(this)) - eEth_balance
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);
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assertGe(
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trade.calculatedAmount,
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eEth_.balanceOf(address(this)) - eEth_balance
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);
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}
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}
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}
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function testSwapFuzzEtherfiEthEeth(uint256 specifiedAmount, bool isBuy)
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public
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{
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OrderSide side = isBuy ? OrderSide.Buy : OrderSide.Sell;
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IERC20 eth_ = IERC20(address(0));
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IERC20 eEth_ = IERC20(address(eEth));
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bytes32 pair = bytes32(0);
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uint256[] memory limits = adapter.getLimits(pair, eth_, eEth_);
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if (side == OrderSide.Buy) {
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vm.assume(specifiedAmount < limits[1] && specifiedAmount > 10);
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deal(address(adapter), eEth_.totalSupply());
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} else {
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vm.assume(specifiedAmount < limits[0] && specifiedAmount > 10);
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deal(address(adapter), specifiedAmount);
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}
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uint256 eth_balance = address(adapter).balance;
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uint256 eEth_balance = eEth_.balanceOf(address(this));
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Trade memory trade =
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adapter.swap(pair, eth_, eEth_, side, specifiedAmount);
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if (trade.calculatedAmount > 0) {
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if (side == OrderSide.Buy) {
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assertGe(
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specifiedAmount,
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eEth_.balanceOf(address(this)) - eEth_balance
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);
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/// @dev Transfer function contains rounding errors because of
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/// rewards in eETH contract, therefore we assume a +/-2
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/// tolerance
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assertLe(
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specifiedAmount - 2,
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eEth_.balanceOf(address(this)) - eEth_balance
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);
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assertEq(
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trade.calculatedAmount,
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eth_balance - address(adapter).balance
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);
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} else {
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assertEq(
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specifiedAmount, eth_balance - address(adapter).balance
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);
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assertEq(
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trade.calculatedAmount,
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eEth_.balanceOf(address(this)) - eEth_balance
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);
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}
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}
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}
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function testSwapFuzzEtherfiEthWeEth(uint256 specifiedAmount, bool isBuy)
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public
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{
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OrderSide side = isBuy ? OrderSide.Buy : OrderSide.Sell;
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IERC20 eth_ = IERC20(address(0));
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IERC20 weEth_ = IERC20(address(weEth));
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bytes32 pair = bytes32(0);
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uint256[] memory limits = adapter.getLimits(pair, eth_, weEth_);
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if (side == OrderSide.Buy) {
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vm.assume(specifiedAmount < limits[1] && specifiedAmount > 10);
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deal(address(adapter), weEth_.totalSupply());
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} else {
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vm.assume(specifiedAmount < limits[0] && specifiedAmount > 10);
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deal(address(adapter), specifiedAmount);
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}
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uint256 eth_balance = address(adapter).balance;
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uint256 weEth_balance = weEth_.balanceOf(address(this));
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Trade memory trade =
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adapter.swap(pair, eth_, weEth_, side, specifiedAmount);
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if (trade.calculatedAmount > 0) {
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if (side == OrderSide.Buy) {
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assertGe(
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specifiedAmount,
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weEth_.balanceOf(address(this)) - weEth_balance
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);
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/// @dev Transfer function contains rounding errors because of
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/// rewards in eETH contract, therefore we assume a +/-2
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/// tolerance
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assertLe(
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specifiedAmount - 2,
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weEth_.balanceOf(address(this)) - weEth_balance
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);
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assertEq(
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trade.calculatedAmount,
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eth_balance - address(adapter).balance
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);
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} else {
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assertEq(
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specifiedAmount, eth_balance - address(adapter).balance
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);
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assertEq(
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trade.calculatedAmount,
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weEth_.balanceOf(address(this)) - weEth_balance
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);
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}
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}
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}
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function testSwapSellIncreasingEtherfi() public {
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executeIncreasingSwapsEtherfi(OrderSide.Sell);
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}
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function testSwapBuyIncreasingEtherfi() public {
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executeIncreasingSwapsEtherfi(OrderSide.Buy);
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}
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function executeIncreasingSwapsEtherfi(OrderSide side) internal {
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bytes32 pair = bytes32(0);
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uint256 amountConstant_ = 10 ** 18;
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uint256[] memory amounts = new uint256[](TEST_ITERATIONS);
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amounts[0] = amountConstant_;
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for (uint256 i = 1; i < TEST_ITERATIONS; i++) {
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amounts[i] = amountConstant_ * i;
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}
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Trade[] memory trades = new Trade[](TEST_ITERATIONS);
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uint256 beforeSwap;
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for (uint256 i = 1; i < TEST_ITERATIONS; i++) {
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beforeSwap = vm.snapshot();
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deal(address(weEth), address(this), amounts[i]);
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IERC20(address(weEth)).approve(address(adapter), amounts[i]);
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trades[i] = adapter.swap(
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pair,
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IERC20(address(weEth)),
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IERC20(address(eEth)),
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side,
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amounts[i]
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);
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vm.revertTo(beforeSwap);
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}
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for (uint256 i = 1; i < TEST_ITERATIONS - 1; i++) {
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assertLe(trades[i].calculatedAmount, trades[i + 1].calculatedAmount);
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console.log(
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"Prices", trades[i].price.numerator, trades[i].price.denominator
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);
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console.log("Amounts", trades[i].calculatedAmount, amounts[i]);
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assertLe(trades[i].gasUsed, trades[i + 1].gasUsed);
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}
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}
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function testGetCapabilitiesEtherfi(bytes32 pair, address t0, address t1)
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public
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{
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Capability[] memory res =
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adapter.getCapabilities(pair, IERC20(t0), IERC20(t1));
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assertEq(res.length, 3);
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}
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function testGetTokensEtherfi() public {
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bytes32 pair = bytes32(0);
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IERC20[] memory tokens = adapter.getTokens(pair);
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assertEq(tokens.length, 3);
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}
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function testGetLimitsEtherfi() public {
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bytes32 pair = bytes32(0);
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uint256[] memory limits = adapter.getLimits(
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pair, IERC20(address(eEth)), IERC20(address(weEth))
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);
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assertEq(limits.length, 2);
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}
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}
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