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Balancer swap test

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This commit is contained in:
pistomat
2023-12-04 16:30:57 +01:00
parent 7ffee9ac2e
commit 6c6525be2b
5 changed files with 220 additions and 43 deletions
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122
evm/src/balancer-v2/BalancerV2SwapAdapter.sol
View File

@@ -4,6 +4,9 @@ pragma solidity ^0.8.13;
import {IERC20, ISwapAdapter} from "src/interfaces/ISwapAdapter.sol";
uint256 constant RESERVE_LIMIT_FACTOR = 10; // TODO why is the factor so high?
uint256 constant SWAP_DEADLINE_SEC = 1000;
contract BalancerV2SwapAdapter is ISwapAdapter {
IVault immutable vault;
@@ -11,12 +14,57 @@ contract BalancerV2SwapAdapter is ISwapAdapter {
vault = IVault(vault_);
}
function price(
function priceSingle(
bytes32 pairId,
IERC20 sellToken,
IERC20 buyToken,
uint256[] memory sellAmounts
) external view override returns (Fraction[] memory prices) {
uint256 sellAmount
) public returns (Fraction memory calculatedPrice) {
IVault.BatchSwapStep[] memory swapSteps = new IVault.BatchSwapStep[](1);
swapSteps[0] = IVault.BatchSwapStep({
poolId: pairId,
assetInIndex: 0,
assetOutIndex: 1,
amount: sellAmount,
userData: ""
});
address[] memory assets = new address[](2);
assets[0] = address(sellToken);
assets[1] = address(buyToken);
IVault.FundManagement memory funds = IVault.FundManagement({
sender: msg.sender,
fromInternalBalance: false,
recipient: payable(msg.sender),
toInternalBalance: false
});
// assetDeltas correspond to the assets array
int256[] memory assetDeltas = new int256[](2);
assetDeltas = vault.queryBatchSwap(
IVault.SwapKind.GIVEN_IN, swapSteps, assets, funds
);
calculatedPrice = Fraction(uint256(assetDeltas[1]), sellAmount);
}
function priceBatch(
bytes32 pairId,
IERC20 sellToken,
IERC20 buyToken,
uint256[] memory specifiedAmounts
) external returns (Fraction[] memory calculatedPrices) {
for (uint256 i = 0; i < specifiedAmounts.length; i++) {
calculatedPrices[i] =
priceSingle(pairId, sellToken, buyToken, specifiedAmounts[i]);
}
}
function price(bytes32, IERC20, IERC20, uint256[] memory)
external
pure
override
returns (Fraction[] memory)
{
revert NotImplemented("BalancerV2SwapAdapter.price");
}
@@ -44,14 +92,15 @@ contract BalancerV2SwapAdapter is ISwapAdapter {
amount: specifiedAmount,
userData: ""
}),
// This contract is not an approved relayer (yet), so the sender and recipient cannot be msg.sender
IVault.FundManagement({
sender: msg.sender,
sender: address(this),
fromInternalBalance: false,
recipient: payable(msg.sender),
recipient: payable(address(this)),
toInternalBalance: false
}),
0,
block.number
block.timestamp + SWAP_DEADLINE_SEC
);
trade.gasUsed = gasBefore - gasleft();
trade.price = Fraction(0, 1); // Without the price function return 0.
@@ -63,14 +112,16 @@ contract BalancerV2SwapAdapter is ISwapAdapter {
override
returns (uint256[] memory limits)
{
limits = new uint256[](2);
(IERC20[] memory tokens, uint256[] memory balances,) =
vault.getPoolTokens(pairId);
for (uint256 i = 0; i < tokens.length; i++) {
if (tokens[i] == sellToken) {
limits[0] = balances[i];
limits[0] = balances[i] * RESERVE_LIMIT_FACTOR;
}
if (tokens[i] == buyToken) {
limits[1] = balances[i];
limits[1] = balances[i] * RESERVE_LIMIT_FACTOR;
}
}
}
@@ -95,12 +146,13 @@ contract BalancerV2SwapAdapter is ISwapAdapter {
(tokens,,) = vault.getPoolTokens(pairId);
}
/// @dev Balancer V2 does not support enumerating pools, they have to be indexed off-chain.
function getPoolIds(uint256 offset, uint256 limit)
/// @dev Balancer V2 does not support enumerating pools, they have to be
/// indexed off-chain.
function getPoolIds(uint256, uint256)
external
view
pure
override
returns (bytes32[] memory ids)
returns (bytes32[] memory)
{
revert NotImplemented("BalancerV2SwapAdapter.getPoolIds");
}
@@ -174,9 +226,7 @@ interface IVault {
uint256 feeAmount
);
event InternalBalanceChanged(
address indexed user,
address indexed token,
int256 delta
address indexed user, address indexed token, int256 delta
);
event PausedStateChanged(bool paused);
event PoolBalanceChanged(
@@ -199,9 +249,7 @@ interface IVault {
uint8 specialization
);
event RelayerApprovalChanged(
address indexed relayer,
address indexed sender,
bool approved
address indexed relayer, address indexed sender, bool approved
);
event Swap(
bytes32 indexed poolId,
@@ -212,9 +260,7 @@ interface IVault {
);
event TokensDeregistered(bytes32 indexed poolId, address[] tokens);
event TokensRegistered(
bytes32 indexed poolId,
address[] tokens,
address[] assetManagers
bytes32 indexed poolId, address[] tokens, address[] assetManagers
);
function WETH() external view returns (address);
@@ -228,7 +274,8 @@ interface IVault {
uint256 deadline
) external payable returns (int256[] memory assetDeltas);
function deregisterTokens(bytes32 poolId, address[] memory tokens) external;
function deregisterTokens(bytes32 poolId, address[] memory tokens)
external;
function exitPool(
bytes32 poolId,
@@ -296,6 +343,28 @@ interface IVault {
function manageUserBalance(UserBalanceOp[] memory ops) external payable;
/**
* @dev Simulates a call to `batchSwap`, returning an array of Vault asset
* deltas. Calls to `swap` cannot be
* simulated directly, but an equivalent `batchSwap` call can and will yield
* the exact same result.
*
* Each element in the array corresponds to the asset at the same index, and
* indicates the number of tokens (or ETH)
* the Vault would take from the sender (if positive) or send to the
* recipient (if negative). The arguments it
* receives are the same that an equivalent `batchSwap` call would receive.
*
* Unlike `batchSwap`, this function performs no checks on the sender or
* recipient field in the `funds` struct.
* This makes it suitable to be called by off-chain applications via
* eth_call without needing to hold tokens,
* approve them for the Vault, or even know a user's address.
*
* Note that this function is not 'view' (due to implementation details):
* the client code must explicitly execute
* eth_call instead of eth_sendTransaction.
*/
function queryBatchSwap(
SwapKind kind,
BatchSwapStep[] memory swaps,
@@ -315,11 +384,8 @@ interface IVault {
function setPaused(bool paused) external;
function setRelayerApproval(
address sender,
address relayer,
bool approved
) external;
function setRelayerApproval(address sender, address relayer, bool approved)
external;
/**
* @dev Performs a swap with a single Pool.
@@ -356,8 +422,8 @@ interface IVault {
);
enum SwapKind
/// The number of tokens to send to the Pool is known
{
/// The number of tokens to send to the Pool is known
GIVEN_IN,
/// The number of tokens to take from the Pool is known
GIVEN_OUT

5
evm/src/interfaces/ISwapAdapter.sol
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@@ -29,14 +29,15 @@ interface ISwapAdapter is ISwapAdapterTypes {
/// @param pairId The ID of the trading pair.
/// @param sellToken The token being sold.
/// @param buyToken The token being bought.
/// @param sellAmounts The specified amounts used for price calculation.
/// @param specifiedAmounts The specified amounts used for price
/// calculation.
/// @return prices array of prices as fractions corresponding to the
/// provided amounts.
function price(
bytes32 pairId,
IERC20 sellToken,
IERC20 buyToken,
uint256[] memory sellAmounts
uint256[] memory specifiedAmounts
) external view returns (Fraction[] memory prices);
/**

8
evm/src/uniswap-v2/UniswapV2SwapAdapter.sol
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@@ -16,9 +16,9 @@ contract UniswapV2SwapAdapter is ISwapAdapter {
bytes32 pairId,
IERC20 sellToken,
IERC20 buyToken,
uint256[] memory sellAmounts
uint256[] memory specifiedAmounts
) external view override returns (Fraction[] memory prices) {
prices = new Fraction[](sellAmounts.length);
prices = new Fraction[](specifiedAmounts.length);
IUniswapV2Pair pair = IUniswapV2Pair(address(bytes20(pairId)));
uint112 r0;
uint112 r1;
@@ -28,8 +28,8 @@ contract UniswapV2SwapAdapter is ISwapAdapter {
(r1, r0,) = pair.getReserves();
}
for (uint256 i = 0; i < sellAmounts.length; i++) {
prices[i] = getPriceAt(sellAmounts[i], r0, r1);
for (uint256 i = 0; i < specifiedAmounts.length; i++) {
prices[i] = getPriceAt(specifiedAmounts[i], r0, r1);
}
}

112
evm/test/BalancerV2SwapAdapter.t.sol
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@@ -1 +1,113 @@
// SPDX-License-Identifier: AGPL-3.0-or-later
pragma solidity ^0.8.13;
import "forge-std/Test.sol";
import {
BalancerV2SwapAdapter,
IERC20,
IVault
} from "src/balancer-v2/BalancerV2SwapAdapter.sol";
import {ISwapAdapterTypes} from "src/interfaces/ISwapAdapterTypes.sol";
contract BalancerV2SwapAdapterTest is Test, ISwapAdapterTypes {
IVault constant balancerV2Vault =
IVault(payable(0xBA12222222228d8Ba445958a75a0704d566BF2C8));
BalancerV2SwapAdapter adapter;
IERC20 constant WETH = IERC20(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);
IERC20 constant BAL = IERC20(0xba100000625a3754423978a60c9317c58a424e3D);
address constant B_80BAL_20WETH = 0x5c6Ee304399DBdB9C8Ef030aB642B10820DB8F56;
bytes32 constant B_80BAL_20WETH_POOL_ID =
0x5c6ee304399dbdb9c8ef030ab642b10820db8f56000200000000000000000014;
function setUp() public {
uint256 forkBlock = 17000000;
vm.createSelectFork(vm.rpcUrl("mainnet"), forkBlock);
adapter = new BalancerV2SwapAdapter(payable(address(balancerV2Vault)));
vm.label(address(balancerV2Vault), "IVault");
vm.label(address(adapter), "BalancerV2SwapAdapter");
vm.label(address(WETH), "WETH");
vm.label(address(BAL), "BAL");
vm.label(address(B_80BAL_20WETH), "B_80BAL_20WETH");
}
function testPrice() public {
uint256[] memory amounts = new uint256[](2);
amounts[0] = 100;
amounts[1] = 200;
vm.expectRevert(
abi.encodeWithSelector(
NotImplemented.selector, "BalancerV2SwapAdapter.price"
)
);
adapter.price(B_80BAL_20WETH_POOL_ID, BAL, WETH, amounts);
}
// function testPriceSingleFuzz(uint256 amount) public {
// uint256[] memory limits = adapter.getLimits(B_80BAL_20WETH_POOL_ID, BAL, WETH);
// vm.assume(amount < limits[0]);
// vm.assume(amount > 100);
// uint256[] memory amounts = new uint256[](1);
// amounts[0] = amount;
// Fraction memory price =
// adapter.priceSingle(B_80BAL_20WETH_POOL_ID, BAL, WETH, amount);
// console.log("price.numerator: ", price.numerator);
// console.log("price.denominator: ", price.denominator);
// assertGt(price.numerator, 0);
// }
function testSwapFuzz() public {
// uint256[] memory limits = adapter.getLimits(B_80BAL_20WETH_POOL_ID, BAL, WETH);
// vm.assume(amount < limits[0]);
// vm.assume(amount > 1000000); // TODO getting reverts for amounts near zero
uint256 amount = 100000;
OrderSide side = OrderSide.Sell;
deal(address(BAL), address(adapter), amount);
// BAL.approve(address(adapter), amount);
// BAL.approve(address(balancerV2Vault), amount);
adapter.swap(B_80BAL_20WETH_POOL_ID, BAL, WETH, side, amount);
}
function testGetLimits() public view {
uint256[] memory limits =
adapter.getLimits(B_80BAL_20WETH_POOL_ID, BAL, WETH);
assert(limits.length == 2);
assert(limits[0] > 0);
assert(limits[1] > 0);
}
function testGetCapabilitiesFuzz(bytes32 pair, address t0, address t1) public {
Capability[] memory res =
adapter.getCapabilities(pair, IERC20(t0), IERC20(t1));
assertEq(res.length, 2);
assertEq(uint256(res[0]), uint256(Capability.SellOrder));
assertEq(uint256(res[1]), uint256(Capability.BuyOrder));
}
function testGetTokens() public {
IERC20[] memory tokens = adapter.getTokens(B_80BAL_20WETH_POOL_ID);
assertEq(address(tokens[0]), address(BAL));
assertEq(address(tokens[1]), address(WETH));
}
function testGetPoolIds() public {
vm.expectRevert(
abi.encodeWithSelector(
NotImplemented.selector, "BalancerV2SwapAdapter.getPoolIds"
)
);
adapter.getPoolIds(100, 200);
}
}

14
evm/test/UniswapV2SwapAdapter.t.sol
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@@ -74,15 +74,11 @@ contract UniswapV2PairFunctionTest is Test, ISwapAdapterTypes {
function testSwapFuzz(uint256 amount, bool isBuy) public {
bytes32 pair = bytes32(bytes20(USDC_WETH_PAIR));
OrderSide side = OrderSide.Sell;
uint256[] memory limits;
if (isBuy) {
side = OrderSide.Buy;
limits = pairFunctions.getLimits(pair, WETH, USDC);
} else {
limits = pairFunctions.getLimits(pair, USDC, WETH);
}
OrderSide side = isBuy ? OrderSide.Buy : OrderSide.Sell;
uint256[] memory limits = pairFunctions.getLimits(pair, USDC, WETH);
vm.assume(amount < limits[0]);
deal(address(USDC), address(this), amount);
USDC.approve(address(pairFunctions), amount);
@@ -132,5 +128,7 @@ contract UniswapV2PairFunctionTest is Test, ISwapAdapterTypes {
function testGetLimits() public {
bytes32 pair = bytes32(bytes20(USDC_WETH_PAIR));
uint256[] memory limits = pairFunctions.getLimits(pair, USDC, WETH);
assertEq(limits.length, 2);
}
}