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callback-style funding option

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tim
2025-11-11 00:21:18 -04:00
parent 64c2245f25
commit 46e38ec996
6 changed files with 97 additions and 43 deletions
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102
test/GasTest.sol
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@@ -1,15 +1,25 @@
// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.30;
/* solhint-disable erc20-unchecked-transfer */
import "forge-std/Test.sol";
import "@abdk/ABDKMath64x64.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../src/LMSRStabilized.sol";
import "../src/PartyPool.sol";
import "../src/PartyPlanner.sol";
import "../lib/openzeppelin-contracts/contracts/interfaces/IERC3156FlashBorrower.sol";
import {ABDKMath64x64} from "../lib/abdk-libraries-solidity/ABDKMath64x64.sol";
import {CommonBase} from "../lib/forge-std/src/Base.sol";
import {StdAssertions} from "../lib/forge-std/src/StdAssertions.sol";
import {StdChains} from "../lib/forge-std/src/StdChains.sol";
import {StdCheats, StdCheatsSafe} from "../lib/forge-std/src/StdCheats.sol";
import {StdUtils} from "../lib/forge-std/src/StdUtils.sol";
import {Test} from "../lib/forge-std/src/Test.sol";
import {IERC3156FlashBorrower} from "../lib/openzeppelin-contracts/contracts/interfaces/IERC3156FlashBorrower.sol";
import {ERC20} from "../lib/openzeppelin-contracts/contracts/token/ERC20/ERC20.sol";
import {IERC20} from "../lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol";
import {SafeERC20} from "../lib/openzeppelin-contracts/contracts/token/ERC20/utils/SafeERC20.sol";
import {IPartyPool} from "../src/IPartyPool.sol";
import {LMSRStabilized} from "../src/LMSRStabilized.sol";
import {PartyPlanner} from "../src/PartyPlanner.sol";
import {PartyPool} from "../src/PartyPool.sol";
import {Deploy} from "./Deploy.sol";
import {TestERC20, FlashBorrower} from "./GasTest.sol";
/* solhint-disable erc20-unchecked-transfer */
/// @notice Test contract that implements the flash callback for testing flash loans
contract FlashBorrower is IERC3156FlashBorrower {
@@ -99,10 +109,10 @@ contract GasTest is Test {
using SafeERC20 for TestERC20;
PartyPlanner internal planner;
PartyPool internal pool2;
PartyPool internal pool10;
PartyPool internal pool20;
PartyPool internal pool50;
IPartyPool internal pool2;
IPartyPool internal pool10;
IPartyPool internal pool20;
IPartyPool internal pool50;
address internal alice;
address internal bob;
@@ -115,7 +125,7 @@ contract GasTest is Test {
uint256 constant internal BASE = 1; // use base=1 so internal amounts correspond to raw integers (Q64.64 units)
/// @notice Helper function to create a pool with the specified number of _tokens
function createPool(uint256 numTokens) internal returns (PartyPool) {
function createPool(uint256 numTokens) internal returns (IPartyPool) {
// Deploy _tokens dynamically
address[] memory tokens = new address[](numTokens);
uint256[] memory bases = new uint256[](numTokens);
@@ -141,21 +151,21 @@ contract GasTest is Test {
}
// Compute kappa from slippage params and number of _tokens, then construct pool with kappa
int128 computedKappa = LMSRStabilized.computeKappaFromSlippage(ierc20Tokens.length, tradeFrac, targetSlippage);
PartyPool newPool = Deploy.newPartyPool(address(this), poolName, poolName, ierc20Tokens, computedKappa, feePpm, feePpm, false);
// Transfer initial deposit amounts into pool before initial mint
uint256[] memory initialBalances = new uint256[](numTokens);
for (uint256 i = 0; i < numTokens; i++) {
TestERC20(tokens[i]).transfer(address(newPool), INIT_BAL);
initialBalances[i] = INIT_BAL;
ierc20Tokens[i].approve(address(planner), INIT_BAL);
}
// Perform initial mint (initial deposit); receiver is this contract
newPool.initialMint(address(this), 0);
vm.prank(planner.owner());
(IPartyPool newPool, ) = planner.newPool(poolName, poolName, ierc20Tokens, computedKappa, feePpm, feePpm, false,
address(this), address(this), initialBalances, 0, 0);
return newPool;
}
/// @notice Helper to create a pool with the stable-pair optimization enabled
function createPoolStable(uint256 numTokens) internal returns (PartyPool) {
function createPoolStable(uint256 numTokens) internal returns (IPartyPool) {
// Deploy _tokens dynamically
address[] memory tokens = new address[](numTokens);
uint256[] memory bases = new uint256[](numTokens);
@@ -181,7 +191,7 @@ contract GasTest is Test {
ierc20Tokens[i] = IERC20(tokens[i]);
}
int128 computedKappa = LMSRStabilized.computeKappaFromSlippage(ierc20Tokens.length, tradeFrac, targetSlippage);
PartyPool newPool = Deploy.newPartyPool(address(this), poolName, poolName, ierc20Tokens, computedKappa, feePpm, feePpm, true);
IPartyPool newPool = Deploy.newPartyPool(address(this), poolName, poolName, ierc20Tokens, computedKappa, feePpm, feePpm, true);
// Transfer initial deposit amounts into pool before initial mint
for (uint256 i = 0; i < numTokens; i++) {
@@ -227,15 +237,37 @@ contract GasTest is Test {
}
/// @notice Helper function: perform 10 swaps back-and-forth between the first two _tokens.
function _performSwapGasTest(PartyPool testPool) internal {
function _performSwapGasTest(IPartyPool testPool) internal {
_performSwapGasTest(testPool, false);
}
function sendTokensCallback(IERC20 token, uint256 amount) external {
// verify the caller
require(planner.getPoolSupported(msg.sender), 'Not a LiqP pool');
token.transferFrom( alice, msg.sender, amount);
}
function _performSwapGasTest(IPartyPool testPool, bool useCallback) internal {
IERC20[] memory tokens = testPool.allTokens();
require(tokens.length >= 2, "Pool must have at least 2 tokens");
address payer;
address spender;
bytes4 selector;
// Ensure alice approves pool for both _tokens
if (useCallback) {
payer = address(this);
spender = address(this);
selector = this.sendTokensCallback.selector;
}
else {
payer = alice;
spender = address(testPool);
selector = bytes4(0);
}
vm.prank(alice);
TestERC20(address(tokens[0])).approve(address(testPool), type(uint256).max);
TestERC20(address(tokens[0])).approve(spender, type(uint256).max);
vm.prank(alice);
TestERC20(address(tokens[1])).approve(address(testPool), type(uint256).max);
TestERC20(address(tokens[1])).approve(spender, type(uint256).max);
uint256 maxIn = 10_000;
@@ -244,10 +276,10 @@ contract GasTest is Test {
vm.prank(alice);
if (i % 2 == 0) {
// swap token0 -> token1
testPool.swap(alice, alice, 0, 1, maxIn, 0, 0, false);
testPool.swap(payer, selector, alice, 0, 1, maxIn, 0, 0, false);
} else {
// swap token1 -> token0
testPool.swap(alice, alice, 1, 0, maxIn, 0, 0, false);
testPool.swap(payer, selector, alice, 1, 0, maxIn, 0, 0, false);
}
// shake up the bits
maxIn *= 787;
@@ -265,6 +297,12 @@ contract GasTest is Test {
_performSwapGasTest(pool10);
}
/// @notice Gas measurement: perform 10 swaps back-and-forth between first two _tokens in the 10-token pool using the callback funding method.
function testSwapGasCallback() public {
_performSwapGasTest(pool10, true);
}
/// @notice Gas measurement: perform 10 swaps back-and-forth between first two _tokens in the 20-token pool.
function testSwapGasTwenty() public {
_performSwapGasTest(pool20);
@@ -277,24 +315,24 @@ contract GasTest is Test {
/// @notice Gas measurement: perform 10 swaps back-and-forth on a 2-token stable pair (stable-path enabled)
function testSwapGasStablePair() public {
PartyPool stablePair = createPoolStable(2);
IPartyPool stablePair = createPoolStable(2);
_performSwapGasTest(stablePair);
}
/// @notice Gas-style test: alternate swapMint then burnSwap on a 2-token stable pair
function testSwapMintBurnSwapGasStablePair() public {
PartyPool stablePair = createPoolStable(2);
IPartyPool stablePair = createPoolStable(2);
_performSwapMintBurnSwapGasTest(stablePair);
}
/// @notice Combined gas test (mint then burn) on 2-token stable pair using mint() and burn().
function testMintBurnGasStablePair() public {
PartyPool stablePair = createPoolStable(2);
IPartyPool stablePair = createPoolStable(2);
_performMintBurnGasTest(stablePair);
}
/// @notice Helper function: alternate swapMint then burnSwap to keep pool size roughly stable.
function _performSwapMintBurnSwapGasTest(PartyPool testPool) internal {
function _performSwapMintBurnSwapGasTest(IPartyPool testPool) internal {
uint256 iterations = 10;
uint256 input = 1_000;
IERC20[] memory tokens = testPool.allTokens();
@@ -339,7 +377,7 @@ contract GasTest is Test {
/// @notice Helper function: combined gas test (mint then burn) using mint() and burn().
/// Alternates minting a tiny LP amount and immediately burning the actual minted LP back to avoid net pool depletion.
function _performMintBurnGasTest(PartyPool testPool) internal {
function _performMintBurnGasTest(IPartyPool testPool) internal {
uint256 iterations = 50;
uint256 input = 1_000;
IERC20[] memory poolTokens = testPool.allTokens();