swapMintImpl moved into mintImpl
This commit is contained in:
tim
@@ -15,6 +15,7 @@ import {PartyPoolMintImpl} from "./PartyPoolMintImpl.sol";
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import {PartyPoolSwapMintImpl} from "./PartyPoolSwapMintImpl.sol";
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import {ERC20External} from "./ERC20External.sol";
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/// @title PartyPool - LMSR-backed multi-asset pool with LP ERC20 token
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/// @notice A multi-asset liquidity pool backed by the LMSRStabilized pricing model.
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/// The pool issues an ERC20 LP token representing proportional ownership.
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@@ -250,13 +251,6 @@ contract PartyPool is PartyPoolBase, ERC20External, IPartyPool {
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}
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}
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/// @dev Helper to record cached balances as effectiveBalance = onchain - owed. Reverts if owed > onchain.
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function _recordCachedBalance(uint256 idx, uint256 onchainBal) internal {
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uint256 owed = protocolFeesOwed[idx];
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require(onchainBal >= owed, "balance < protocol owed");
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cachedUintBalances[idx] = onchainBal - owed;
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}
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/// @notice Swap input token i -> token j. Payer must approve token i.
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/// @dev This function transfers the exact gross input (including fee) from payer and sends the computed output to receiver.
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/// Non-standard tokens (fee-on-transfer, rebasers) are rejected via balance checks.
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@@ -499,7 +493,7 @@ contract PartyPool is PartyPoolBase, ERC20External, IPartyPool {
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function swapMintAmounts(uint256 inputTokenIndex, uint256 maxAmountIn) external view
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returns (uint256 amountInUsed, uint256 fee, uint256 lpMinted) {
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return SWAP_MINT_IMPL.swapMintAmounts(
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return MINT_IMPL.swapMintAmounts(
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inputTokenIndex,
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maxAmountIn,
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SWAP_FEE_PPM,
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@@ -511,7 +505,7 @@ contract PartyPool is PartyPoolBase, ERC20External, IPartyPool {
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function burnSwapAmounts(uint256 lpAmount, uint256 inputTokenIndex) external view
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returns (uint256 amountOut) {
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return SWAP_MINT_IMPL.burnSwapAmounts(
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return MINT_IMPL.burnSwapAmounts(
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lpAmount,
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inputTokenIndex,
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SWAP_FEE_PPM,
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@@ -537,32 +531,18 @@ contract PartyPool is PartyPoolBase, ERC20External, IPartyPool {
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uint256 deadline
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) external returns (uint256 lpMinted) {
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bytes memory data = abi.encodeWithSignature(
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"swapMint(address,address,uint256,uint256,uint256,uint256)",
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"swapMint(address,address,uint256,uint256,uint256,uint256,uint256)",
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payer,
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receiver,
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inputTokenIndex,
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maxAmountIn,
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deadline,
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SWAP_FEE_PPM
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SWAP_FEE_PPM,
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PROTOCOL_FEE_PPM
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);
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bytes memory result = Address.functionDelegateCall(address(SWAP_MINT_IMPL), data);
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// New ABI: implementation returns (uint256 lpMinted, uint256 feeUintActual)
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(uint256 lpOut, uint256 feeUintActual) = abi.decode(result, (uint256, uint256));
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// Accrue protocol share (floor) from the fee on the input token
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if (PROTOCOL_FEE_PPM > 0 && feeUintActual > 0 && PROTOCOL_FEE_ADDRESS != address(0)) {
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uint256 protoShare = (feeUintActual * PROTOCOL_FEE_PPM) / 1_000_000;
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if (protoShare > 0) {
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protocolFeesOwed[inputTokenIndex] += protoShare;
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}
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}
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// Update cached balance for the input token to effective onchain - owed
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uint256 bal = IERC20(tokens[inputTokenIndex]).balanceOf(address(this));
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_recordCachedBalance(inputTokenIndex, bal);
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return lpOut;
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bytes memory result = Address.functionDelegateCall(address(MINT_IMPL), data);
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return abi.decode(result, (uint256));
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}
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/// @notice Burn LP tokens then swap the redeemed proportional basket into a single asset `inputTokenIndex` and send to receiver.
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@@ -581,32 +561,18 @@ contract PartyPool is PartyPoolBase, ERC20External, IPartyPool {
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uint256 deadline
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) external returns (uint256 amountOutUint) {
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bytes memory data = abi.encodeWithSignature(
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"burnSwap(address,address,uint256,uint256,uint256,uint256)",
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"burnSwap(address,address,uint256,uint256,uint256,uint256,uint256)",
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payer,
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receiver,
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lpAmount,
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inputTokenIndex,
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deadline,
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SWAP_FEE_PPM
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SWAP_FEE_PPM,
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PROTOCOL_FEE_PPM
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);
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bytes memory result = Address.functionDelegateCall(address(SWAP_MINT_IMPL), data);
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// New ABI: implementation returns (uint256 amountOutUint, uint256 feeTokenUint)
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(uint256 outAmt, uint256 feeTokenUint) = abi.decode(result, (uint256, uint256));
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// Accrue protocol share (floor) from the token-side fee computed by implementation
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if (PROTOCOL_FEE_PPM > 0 && feeTokenUint > 0 && PROTOCOL_FEE_ADDRESS != address(0)) {
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uint256 protoShare = (feeTokenUint * PROTOCOL_FEE_PPM) / 1_000_000;
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if (protoShare > 0) {
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protocolFeesOwed[inputTokenIndex] += protoShare;
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}
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}
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// Update cached balance for the target token to effective onchain - owed
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uint256 bal = IERC20(tokens[inputTokenIndex]).balanceOf(address(this));
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_recordCachedBalance(inputTokenIndex, bal);
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return outAmt;
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bytes memory result = Address.functionDelegateCall(address(MINT_IMPL), data);
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return abi.decode(result, (uint256));
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}
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@@ -116,4 +116,12 @@ abstract contract PartyPoolBase is ERC20Internal, ReentrancyGuard {
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}
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return total;
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}
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/// @dev Helper to record cached balances as effectiveBalance = onchain - owed. Reverts if owed > onchain.
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function _recordCachedBalance(uint256 idx, uint256 onchainBal) internal {
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uint256 owed = protocolFeesOwed[idx];
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require(onchainBal >= owed, "balance < protocol owed");
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cachedUintBalances[idx] = onchainBal - owed;
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}
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}
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@@ -1,12 +1,13 @@
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// SPDX-License-Identifier: UNLICENSED
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pragma solidity ^0.8.30;
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import "@abdk/ABDKMath64x64.sol";
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import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
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import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
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import "./PartyPoolBase.sol";
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import "./LMSRStabilized.sol";
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import {PartyPool} from "./PartyPool.sol";
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import {ABDKMath64x64} from "../lib/abdk-libraries-solidity/ABDKMath64x64.sol";
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import {IERC20} from "../lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol";
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import {SafeERC20} from "../lib/openzeppelin-contracts/contracts/token/ERC20/utils/SafeERC20.sol";
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import {ERC20Internal} from "./ERC20Internal.sol";
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import {IPartyPool} from "./IPartyPool.sol";
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import {LMSRStabilized} from "./LMSRStabilized.sol";
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import {PartyPoolBase} from "./PartyPoolBase.sol";
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/// @title PartyPoolMintImpl - Implementation contract for mint and burn functions
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/// @notice This contract contains the mint and burn implementation that will be called via delegatecall
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@@ -20,6 +21,10 @@ contract PartyPoolMintImpl is PartyPoolBase {
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event Mint(address indexed payer, address indexed receiver, uint256[] depositAmounts, uint256 lpMinted);
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event Burn(address indexed payer, address indexed receiver, uint256[] withdrawAmounts, uint256 lpBurned);
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//
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// Initialization Mint
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//
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function initialMint(address receiver, uint256 lpTokens, int128 KAPPA) external
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returns (uint256 lpMinted) {
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uint256 n = tokens.length;
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@@ -55,6 +60,11 @@ contract PartyPoolMintImpl is PartyPoolBase {
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emit Mint(address(0), receiver, depositAmounts, lpMinted);
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}
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//
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// Regular Mint and Burn
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//
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function mint(address payer, address receiver, uint256 lpTokenAmount, uint256 deadline) external returns (uint256 lpMinted) {
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require(deadline == 0 || block.timestamp <= deadline, "mint: deadline exceeded");
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uint256 n = tokens.length;
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@@ -192,7 +202,8 @@ contract PartyPoolMintImpl is PartyPoolBase {
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emit Burn(payer, receiver, withdrawAmounts, lpAmount);
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}
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function mintAmounts(uint256 lpTokenAmount, uint256 numAssets, uint256 totalSupply, uint256[] memory cachedUintBalances) public pure
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function mintAmounts(uint256 lpTokenAmount,
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uint256 numAssets, uint256 totalSupply, uint256[] memory cachedUintBalances) public pure
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returns (uint256[] memory depositAmounts) {
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depositAmounts = new uint256[](numAssets);
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@@ -232,4 +243,357 @@ contract PartyPoolMintImpl is PartyPoolBase {
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return withdrawAmounts;
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}
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//
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// Swap-Mint and Burn-Swap
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//
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/// @notice Single-token mint: deposit a single token, charge swap-LMSR cost, and mint LP.
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/// @dev swapMint executes as an exact-in planned swap followed by proportional scaling of qInternal.
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/// The function emits SwapMint (gross, net, fee) and also emits Mint for LP issuance.
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/// @param payer who transfers the input token
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/// @param receiver who receives the minted LP tokens
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/// @param inputTokenIndex index of the input token
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/// @param maxAmountIn maximum uint token input (inclusive of fee)
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/// @param deadline optional deadline
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/// @param swapFeePpm fee in parts-per-million for this pool
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/// @return lpMinted actual LP minted (uint)
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function swapMint(
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address payer,
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address receiver,
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uint256 inputTokenIndex,
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uint256 maxAmountIn,
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uint256 deadline,
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uint256 swapFeePpm,
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uint256 protocolFeePpm
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) external returns (uint256 lpMinted) {
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uint256 n = tokens.length;
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require(inputTokenIndex < n, "swapMint: idx");
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require(maxAmountIn > 0, "swapMint: input zero");
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require(deadline == 0 || block.timestamp <= deadline, "swapMint: deadline");
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require(lmsr.nAssets > 0, "swapMint: uninit pool");
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// compute fee on gross maxAmountIn to get an initial net estimate (we'll recompute based on actual used)
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(, uint256 netUintGuess) = _computeFee(maxAmountIn, swapFeePpm);
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// Convert the net guess to internal (floor)
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int128 netInternalGuess = _uintToInternalFloor(netUintGuess, bases[inputTokenIndex]);
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require(netInternalGuess > int128(0), "swapMint: input too small after fee");
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// Use LMSR view to determine actual internal consumed and size-increase (ΔS) for mint
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(int128 amountInInternalUsed, int128 sizeIncreaseInternal) = lmsr.swapAmountsForMint(inputTokenIndex, netInternalGuess);
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// amountInInternalUsed may be <= netInternalGuess. Convert to uint (ceil) to determine actual transfer
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uint256 amountInUint = _internalToUintCeil(amountInInternalUsed, bases[inputTokenIndex]);
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require(amountInUint > 0, "swapMint: input zero after internal conversion");
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// Compute fee on the actual used input and total transfer amount (ceiling)
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uint256 feeUintActual = _ceilFee(amountInUint, swapFeePpm);
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uint256 totalTransfer = amountInUint + feeUintActual;
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require(totalTransfer > 0 && totalTransfer <= maxAmountIn, "swapMint: transfer exceeds max");
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// Record pre-balance and transfer tokens from payer, require exact receipt (revert on fee-on-transfer)
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uint256 prevBalI = IERC20(tokens[inputTokenIndex]).balanceOf(address(this));
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tokens[inputTokenIndex].safeTransferFrom(payer, address(this), totalTransfer);
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uint256 balIAfter = IERC20(tokens[inputTokenIndex]).balanceOf(address(this));
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require(balIAfter == prevBalI + totalTransfer, "swapMint: non-standard tokenIn");
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// Accrue protocol share (floor) from the fee on the input token
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if (protocolFeePpm > 0 && feeUintActual > 0) {
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uint256 protoShare = (feeUintActual * protocolFeePpm) / 1_000_000;
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if (protoShare > 0) {
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protocolFeesOwed[inputTokenIndex] += protoShare;
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}
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}
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// Update cached balance for the input token to effective onchain - owed
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_recordCachedBalance(inputTokenIndex, balIAfter);
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// Compute old and new scaled size metrics to determine LP minted
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int128 oldTotal = _computeSizeMetric(lmsr.qInternal);
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require(oldTotal > int128(0), "swapMint: zero total");
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uint256 oldScaled = ABDKMath64x64.mulu(oldTotal, LP_SCALE);
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int128 newTotal = oldTotal.add(sizeIncreaseInternal);
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uint256 newScaled = ABDKMath64x64.mulu(newTotal, LP_SCALE);
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uint256 actualLpToMint;
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// Use natural ERC20 function since base contract inherits from ERC20
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uint256 currentSupply = _totalSupply;
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if (currentSupply == 0) {
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// If somehow supply zero (shouldn't happen as lmsr.nAssets>0), mint newScaled
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actualLpToMint = newScaled;
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} else {
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require(oldScaled > 0, "swapMint: oldScaled zero");
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uint256 delta = (newScaled > oldScaled) ? (newScaled - oldScaled) : 0;
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if (delta > 0) {
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// floor truncation rounds in favor of pool
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actualLpToMint = (currentSupply * delta) / oldScaled;
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} else {
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actualLpToMint = 0;
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}
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}
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require(actualLpToMint > 0, "swapMint: zero LP minted");
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// Update LMSR internal state: scale qInternal proportionally by newTotal/oldTotal
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int128[] memory newQInternal = new int128[](n);
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for (uint256 idx = 0; idx < n; idx++) {
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// newQInternal[idx] = qInternal[idx] * (newTotal / oldTotal)
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newQInternal[idx] = lmsr.qInternal[idx].mul(newTotal).div(oldTotal);
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}
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// Update cached internal and kappa via updateForProportionalChange
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lmsr.updateForProportionalChange(newQInternal);
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// Use natural ERC20 function since base contract inherits from ERC20
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_mint(receiver, actualLpToMint);
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// Emit SwapMint event with gross transfer, net input and fee (planned exact-in)
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emit IPartyPool.SwapMint(payer, receiver, inputTokenIndex, totalTransfer, amountInUint, feeUintActual);
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// Emit standard Mint event which records deposit amounts and LP minted
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emit IPartyPool.Mint(payer, receiver, new uint256[](n), actualLpToMint);
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// Note: depositAmounts array omitted (empty) since swapMint uses single-token input
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return actualLpToMint;
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}
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/// @notice Calculate the amounts for a swap mint operation
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/// @dev This is a pure view function that computes swap mint amounts from provided state
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/// @param inputTokenIndex index of the input token
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/// @param maxAmountIn maximum amount of token to deposit (inclusive of fee)
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/// @param swapFeePpm fee in parts-per-million
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/// @param lmsrState current LMSR state
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/// @param bases_ scaling bases for each token
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/// @param totalSupply_ current total LP token supply
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/// @return amountInUsed actual input amount used (excluding fee)
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/// @return fee fee amount charged
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/// @return lpMinted LP tokens that would be minted
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function swapMintAmounts(
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uint256 inputTokenIndex,
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uint256 maxAmountIn,
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uint256 swapFeePpm,
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LMSRStabilized.State memory lmsrState,
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uint256[] memory bases_,
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uint256 totalSupply_
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) public pure returns (uint256 amountInUsed, uint256 fee, uint256 lpMinted) {
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require(inputTokenIndex < bases_.length, "swapMintAmounts: idx");
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require(maxAmountIn > 0, "swapMintAmounts: input zero");
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require(lmsrState.nAssets > 0, "swapMintAmounts: uninit pool");
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// Compute fee on gross maxAmountIn to get an initial net estimate
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uint256 feeGuess = 0;
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uint256 netUintGuess = maxAmountIn;
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if (swapFeePpm > 0) {
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feeGuess = (maxAmountIn * swapFeePpm + 999999) / 1000000; // ceil fee
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netUintGuess = maxAmountIn - feeGuess;
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}
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// Convert the net guess to internal (floor)
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int128 netInternalGuess = _uintToInternalFloorPure(netUintGuess, bases_[inputTokenIndex]);
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require(netInternalGuess > int128(0), "swapMintAmounts: input too small after fee");
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// Use LMSR view to determine actual internal consumed and size-increase (ΔS) for mint
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(int128 amountInInternalUsed, int128 sizeIncreaseInternal) =
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LMSRStabilized.swapAmountsForMint(lmsrState.nAssets, lmsrState.kappa, lmsrState.qInternal,
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inputTokenIndex, netInternalGuess);
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// amountInInternalUsed may be <= netInternalGuess. Convert to uint (ceil) to determine actual transfer
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amountInUsed = _internalToUintCeilPure(amountInInternalUsed, bases_[inputTokenIndex]);
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require(amountInUsed > 0, "swapMintAmounts: input zero after internal conversion");
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// Compute fee on the actual used input (ceiling)
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fee = 0;
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if (swapFeePpm > 0) {
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fee = (amountInUsed * swapFeePpm + 999999) / 1000000; // ceil fee
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}
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uint256 totalTransfer = amountInUsed + fee;
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require(totalTransfer > 0 && totalTransfer <= maxAmountIn, "swapMintAmounts: transfer exceeds max");
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// Compute old and new scaled size metrics to determine LP minted
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int128 oldTotal = _computeSizeMetricPure(lmsrState.qInternal);
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require(oldTotal > int128(0), "swapMintAmounts: zero total");
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uint256 oldScaled = ABDKMath64x64.mulu(oldTotal, LP_SCALE);
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int128 newTotal = oldTotal.add(sizeIncreaseInternal);
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uint256 newScaled = ABDKMath64x64.mulu(newTotal, LP_SCALE);
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if (totalSupply_ == 0) {
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// If somehow supply zero (shouldn't happen as lmsr.nAssets>0), mint newScaled
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lpMinted = newScaled;
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} else {
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require(oldScaled > 0, "swapMintAmounts: oldScaled zero");
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uint256 delta = (newScaled > oldScaled) ? (newScaled - oldScaled) : 0;
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if (delta > 0) {
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// floor truncation rounds in favor of pool
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lpMinted = (totalSupply_ * delta) / oldScaled;
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} else {
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lpMinted = 0;
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}
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}
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require(lpMinted > 0, "swapMintAmounts: zero LP minted");
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}
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/// @notice Calculate the amounts for a burn swap operation
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/// @dev This is a pure view function that computes burn swap amounts from provided state
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/// @param lpAmount amount of LP tokens to burn
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/// @param inputTokenIndex index of target asset to receive
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/// @param swapFeePpm fee in parts-per-million
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/// @param lmsrState current LMSR state
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/// @param bases_ scaling bases for each token
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/// @param totalSupply_ current total LP token supply
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/// @return amountOut amount of target asset that would be received
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function burnSwapAmounts(
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uint256 lpAmount,
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uint256 inputTokenIndex,
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uint256 swapFeePpm,
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LMSRStabilized.State memory lmsrState,
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uint256[] memory bases_,
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uint256 totalSupply_
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) public pure returns (uint256 amountOut) {
|
||||
require(inputTokenIndex < bases_.length, "burnSwapAmounts: idx");
|
||||
require(lpAmount > 0, "burnSwapAmounts: zero lp");
|
||||
require(totalSupply_ > 0, "burnSwapAmounts: empty supply");
|
||||
|
||||
// alpha = lpAmount / supply as Q64.64
|
||||
int128 alpha = ABDKMath64x64.divu(lpAmount, totalSupply_) // fraction of total supply to burn
|
||||
.mul(ABDKMath64x64.divu(1000000-swapFeePpm, 1000000)); // adjusted for fee
|
||||
|
||||
// Use LMSR view to compute single-asset payout and burned size-metric
|
||||
(int128 payoutInternal, ) = LMSRStabilized.swapAmountsForBurn(lmsrState.nAssets, lmsrState.kappa, lmsrState.qInternal,
|
||||
inputTokenIndex, alpha);
|
||||
|
||||
// Convert payoutInternal -> uint (floor) to favor pool
|
||||
amountOut = _internalToUintFloorPure(payoutInternal, bases_[inputTokenIndex]);
|
||||
require(amountOut > 0, "burnSwapAmounts: output zero");
|
||||
}
|
||||
|
||||
/// @notice Burn LP tokens then swap the redeemed proportional basket into a single asset `inputTokenIndex` and send to receiver.
|
||||
/// @dev The function burns LP tokens (authorization via allowance if needed), sends the single-asset payout and updates LMSR state.
|
||||
/// @param payer who burns LP tokens
|
||||
/// @param receiver who receives the single asset
|
||||
/// @param lpAmount amount of LP tokens to burn
|
||||
/// @param inputTokenIndex index of target asset to receive
|
||||
/// @param deadline optional deadline
|
||||
/// @param swapFeePpm fee in parts-per-million for this pool (may be used for future fee logic)
|
||||
/// @return amountOutUint uint amount of asset i sent to receiver
|
||||
function burnSwap(
|
||||
address payer,
|
||||
address receiver,
|
||||
uint256 lpAmount,
|
||||
uint256 inputTokenIndex,
|
||||
uint256 deadline,
|
||||
uint256 swapFeePpm,
|
||||
uint256 protocolFeePpm
|
||||
) external returns (uint256 amountOutUint) {
|
||||
uint256 n = tokens.length;
|
||||
require(inputTokenIndex < n, "burnSwap: idx");
|
||||
require(lpAmount > 0, "burnSwap: zero lp");
|
||||
require(deadline == 0 || block.timestamp <= deadline, "burnSwap: deadline");
|
||||
|
||||
uint256 supply = _totalSupply;
|
||||
require(supply > 0, "burnSwap: empty supply");
|
||||
require(_balances[payer] >= lpAmount, "burnSwap: insufficient LP");
|
||||
|
||||
// alpha = lpAmount / supply as Q64.64 (adjusted for fee)
|
||||
int128 alpha = ABDKMath64x64.divu(lpAmount, supply) // fraction of total supply to burn
|
||||
.mul(ABDKMath64x64.divu(1000000-swapFeePpm, 1000000)); // adjusted for fee
|
||||
|
||||
// Use LMSR view to compute single-asset payout and burned size-metric
|
||||
(int128 payoutInternal, ) = lmsr.swapAmountsForBurn(inputTokenIndex, alpha);
|
||||
|
||||
// Convert payoutInternal -> uint (floor) to favor pool
|
||||
amountOutUint = _internalToUintFloor(payoutInternal, bases[inputTokenIndex]);
|
||||
require(amountOutUint > 0, "burnSwap: output zero");
|
||||
|
||||
// Compute gross payout (no swap fee) so we can determine token-side fee = gross - net
|
||||
int128 alphaGross = ABDKMath64x64.divu(lpAmount, supply); // gross fraction (no swap fee)
|
||||
(int128 payoutGrossInternal, ) = lmsr.swapAmountsForBurn(inputTokenIndex, alphaGross);
|
||||
uint256 payoutGrossUint = _internalToUintFloor(payoutGrossInternal, bases[inputTokenIndex]);
|
||||
uint256 feeTokenUint = (payoutGrossUint > amountOutUint) ? (payoutGrossUint - amountOutUint) : 0;
|
||||
|
||||
// Accrue protocol share (floor) from the token-side fee
|
||||
if (protocolFeePpm > 0 && feeTokenUint > 0) {
|
||||
uint256 protoShare = (feeTokenUint * protocolFeePpm) / 1_000_000;
|
||||
if (protoShare > 0) {
|
||||
protocolFeesOwed[inputTokenIndex] += protoShare;
|
||||
}
|
||||
}
|
||||
|
||||
// Transfer the payout to receiver
|
||||
tokens[inputTokenIndex].safeTransfer(receiver, amountOutUint);
|
||||
|
||||
// Burn LP tokens from payer (authorization via allowance)
|
||||
if (msg.sender != payer) {
|
||||
uint256 allowed = _allowances[payer][msg.sender];
|
||||
require(allowed >= lpAmount, "burnSwap: allowance insufficient");
|
||||
_approve(payer, msg.sender, allowed - lpAmount);
|
||||
}
|
||||
_burn(payer, lpAmount);
|
||||
|
||||
// Update cached balances by reading on-chain balances for all tokens
|
||||
int128[] memory newQInternal = new int128[](n);
|
||||
for (uint256 idx = 0; idx < n; idx++) {
|
||||
uint256 bal = IERC20(tokens[idx]).balanceOf(address(this));
|
||||
cachedUintBalances[idx] = bal;
|
||||
_recordCachedBalance(inputTokenIndex, bal);
|
||||
newQInternal[idx] = _uintToInternalFloor(bal, bases[idx]);
|
||||
}
|
||||
|
||||
// Emit BurnSwap with public-facing info only (do not expose ΔS or LP burned)
|
||||
emit IPartyPool.BurnSwap(payer, receiver, inputTokenIndex, amountOutUint);
|
||||
|
||||
// If entire pool drained, deinit; else update proportionally
|
||||
bool allZero = true;
|
||||
for (uint256 idx = 0; idx < n; idx++) {
|
||||
if (newQInternal[idx] != int128(0)) { allZero = false; break; }
|
||||
}
|
||||
if (allZero) {
|
||||
lmsr.deinit();
|
||||
} else {
|
||||
lmsr.updateForProportionalChange(newQInternal);
|
||||
}
|
||||
|
||||
emit IPartyPool.Burn(payer, receiver, new uint256[](n), lpAmount);
|
||||
return amountOutUint;
|
||||
}
|
||||
|
||||
/// @notice Pure version of _uintToInternalFloor for use in view functions
|
||||
function _uintToInternalFloorPure(uint256 amount, uint256 base) internal pure returns (int128) {
|
||||
// amount / base as Q64.64, floored
|
||||
return ABDKMath64x64.divu(amount, base);
|
||||
}
|
||||
|
||||
/// @notice Pure version of _internalToUintCeil for use in view functions
|
||||
function _internalToUintCeilPure(int128 amount, uint256 base) internal pure returns (uint256) {
|
||||
// Convert Q64.64 to uint with ceiling: ceil(amount * base)
|
||||
// Use mulu which floors, then add remainder check for ceiling
|
||||
uint256 floored = ABDKMath64x64.mulu(amount, base);
|
||||
// Check if there's a fractional part by computing amount * base - floored
|
||||
int128 baseQ64 = ABDKMath64x64.fromUInt(base);
|
||||
int128 flooredQ64 = ABDKMath64x64.fromUInt(floored);
|
||||
int128 product = amount.mul(baseQ64);
|
||||
if (product > flooredQ64) {
|
||||
return floored + 1; // Ceiling
|
||||
}
|
||||
return floored;
|
||||
}
|
||||
|
||||
/// @notice Pure version of _internalToUintFloor for use in view functions
|
||||
function _internalToUintFloorPure(int128 amount, uint256 base) internal pure returns (uint256) {
|
||||
// Convert Q64.64 to uint with floor: floor(amount * base)
|
||||
return ABDKMath64x64.mulu(amount, base);
|
||||
}
|
||||
|
||||
/// @notice Pure version of _computeSizeMetric for use in view functions
|
||||
function _computeSizeMetricPure(int128[] memory qInternal) internal pure returns (int128) {
|
||||
int128 sum = int128(0);
|
||||
for (uint256 i = 0; i < qInternal.length; i++) {
|
||||
sum = sum.add(qInternal[i]);
|
||||
}
|
||||
return sum;
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
@@ -6,6 +6,7 @@ import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
|
||||
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
|
||||
import "./PartyPoolBase.sol";
|
||||
import "./LMSRStabilized.sol";
|
||||
import {IPartyPool} from "./IPartyPool.sol";
|
||||
|
||||
/// @title PartyPoolSwapMintImpl - Implementation contract for swapMint and burnSwap functions
|
||||
/// @notice This contract contains the swapMint and burnSwap implementation that will be called via delegatecall
|
||||
@@ -15,341 +16,5 @@ contract PartyPoolSwapMintImpl is PartyPoolBase {
|
||||
using LMSRStabilized for LMSRStabilized.State;
|
||||
using SafeERC20 for IERC20;
|
||||
|
||||
// Events that mirror the main contract events
|
||||
event SwapMint(address indexed payer, address indexed receiver, uint256 indexed inputTokenIndex, uint256 totalTransfer, uint256 amountInUint, uint256 feeUintActual);
|
||||
event BurnSwap(address indexed payer, address indexed receiver, uint256 indexed inputTokenIndex, uint256 amountOutUint);
|
||||
event Mint(address indexed payer, address indexed receiver, uint256[] depositAmounts, uint256 lpMinted);
|
||||
event Burn(address indexed payer, address indexed receiver, uint256[] withdrawAmounts, uint256 lpBurned);
|
||||
|
||||
|
||||
/// @notice Single-token mint: deposit a single token, charge swap-LMSR cost, and mint LP.
|
||||
/// @dev swapMint executes as an exact-in planned swap followed by proportional scaling of qInternal.
|
||||
/// The function emits SwapMint (gross, net, fee) and also emits Mint for LP issuance.
|
||||
/// @param payer who transfers the input token
|
||||
/// @param receiver who receives the minted LP tokens
|
||||
/// @param inputTokenIndex index of the input token
|
||||
/// @param maxAmountIn maximum uint token input (inclusive of fee)
|
||||
/// @param deadline optional deadline
|
||||
/// @param swapFeePpm fee in parts-per-million for this pool
|
||||
/// @return lpMinted actual LP minted (uint)
|
||||
function swapMint(
|
||||
address payer,
|
||||
address receiver,
|
||||
uint256 inputTokenIndex,
|
||||
uint256 maxAmountIn,
|
||||
uint256 deadline,
|
||||
uint256 swapFeePpm
|
||||
) external returns (uint256 lpMinted, uint256 feeUintActual) {
|
||||
uint256 n = tokens.length;
|
||||
require(inputTokenIndex < n, "swapMint: idx");
|
||||
require(maxAmountIn > 0, "swapMint: input zero");
|
||||
require(deadline == 0 || block.timestamp <= deadline, "swapMint: deadline");
|
||||
require(lmsr.nAssets > 0, "swapMint: uninit pool");
|
||||
|
||||
// compute fee on gross maxAmountIn to get an initial net estimate (we'll recompute based on actual used)
|
||||
(, uint256 netUintGuess) = _computeFee(maxAmountIn, swapFeePpm);
|
||||
|
||||
// Convert the net guess to internal (floor)
|
||||
int128 netInternalGuess = _uintToInternalFloor(netUintGuess, bases[inputTokenIndex]);
|
||||
require(netInternalGuess > int128(0), "swapMint: input too small after fee");
|
||||
|
||||
// Use LMSR view to determine actual internal consumed and size-increase (ΔS) for mint
|
||||
(int128 amountInInternalUsed, int128 sizeIncreaseInternal) = lmsr.swapAmountsForMint(inputTokenIndex, netInternalGuess);
|
||||
|
||||
// amountInInternalUsed may be <= netInternalGuess. Convert to uint (ceil) to determine actual transfer
|
||||
uint256 amountInUint = _internalToUintCeil(amountInInternalUsed, bases[inputTokenIndex]);
|
||||
require(amountInUint > 0, "swapMint: input zero after internal conversion");
|
||||
|
||||
// Compute fee on the actual used input and total transfer amount (ceiling)
|
||||
feeUintActual = _ceilFee(amountInUint, swapFeePpm);
|
||||
uint256 totalTransfer = amountInUint + feeUintActual;
|
||||
require(totalTransfer > 0 && totalTransfer <= maxAmountIn, "swapMint: transfer exceeds max");
|
||||
|
||||
// Record pre-balance and transfer tokens from payer, require exact receipt (revert on fee-on-transfer)
|
||||
uint256 prevBalI = IERC20(tokens[inputTokenIndex]).balanceOf(address(this));
|
||||
tokens[inputTokenIndex].safeTransferFrom(payer, address(this), totalTransfer);
|
||||
uint256 balIAfter = IERC20(tokens[inputTokenIndex]).balanceOf(address(this));
|
||||
require(balIAfter == prevBalI + totalTransfer, "swapMint: non-standard tokenIn");
|
||||
|
||||
// Update cached uint balances for token inputTokenIndex (implementation writes onchain value; wrapper will set effective)
|
||||
cachedUintBalances[inputTokenIndex] = balIAfter;
|
||||
|
||||
// Compute old and new scaled size metrics to determine LP minted
|
||||
int128 oldTotal = _computeSizeMetric(lmsr.qInternal);
|
||||
require(oldTotal > int128(0), "swapMint: zero total");
|
||||
uint256 oldScaled = ABDKMath64x64.mulu(oldTotal, LP_SCALE);
|
||||
|
||||
int128 newTotal = oldTotal.add(sizeIncreaseInternal);
|
||||
uint256 newScaled = ABDKMath64x64.mulu(newTotal, LP_SCALE);
|
||||
|
||||
uint256 actualLpToMint;
|
||||
// Use natural ERC20 function since base contract inherits from ERC20
|
||||
uint256 currentSupply = _totalSupply;
|
||||
if (currentSupply == 0) {
|
||||
// If somehow supply zero (shouldn't happen as lmsr.nAssets>0), mint newScaled
|
||||
actualLpToMint = newScaled;
|
||||
} else {
|
||||
require(oldScaled > 0, "swapMint: oldScaled zero");
|
||||
uint256 delta = (newScaled > oldScaled) ? (newScaled - oldScaled) : 0;
|
||||
if (delta > 0) {
|
||||
// floor truncation rounds in favor of pool
|
||||
actualLpToMint = (currentSupply * delta) / oldScaled;
|
||||
} else {
|
||||
actualLpToMint = 0;
|
||||
}
|
||||
}
|
||||
|
||||
require(actualLpToMint > 0, "swapMint: zero LP minted");
|
||||
|
||||
// Update LMSR internal state: scale qInternal proportionally by newTotal/oldTotal
|
||||
int128[] memory newQInternal = new int128[](n);
|
||||
for (uint256 idx = 0; idx < n; idx++) {
|
||||
// newQInternal[idx] = qInternal[idx] * (newTotal / oldTotal)
|
||||
newQInternal[idx] = lmsr.qInternal[idx].mul(newTotal).div(oldTotal);
|
||||
}
|
||||
|
||||
// Update cached internal and kappa via updateForProportionalChange
|
||||
lmsr.updateForProportionalChange(newQInternal);
|
||||
|
||||
// Use natural ERC20 function since base contract inherits from ERC20
|
||||
_mint(receiver, actualLpToMint);
|
||||
|
||||
// Emit SwapMint event with gross transfer, net input and fee (planned exact-in)
|
||||
emit SwapMint(payer, receiver, inputTokenIndex, totalTransfer, amountInUint, feeUintActual);
|
||||
|
||||
// Emit standard Mint event which records deposit amounts and LP minted
|
||||
emit Mint(payer, receiver, new uint256[](n), actualLpToMint);
|
||||
// Note: depositAmounts array omitted (empty) since swapMint uses single-token input
|
||||
|
||||
lpMinted = actualLpToMint;
|
||||
return (lpMinted, feeUintActual);
|
||||
}
|
||||
|
||||
/// @notice Calculate the amounts for a swap mint operation
|
||||
/// @dev This is a pure view function that computes swap mint amounts from provided state
|
||||
/// @param inputTokenIndex index of the input token
|
||||
/// @param maxAmountIn maximum amount of token to deposit (inclusive of fee)
|
||||
/// @param swapFeePpm fee in parts-per-million
|
||||
/// @param lmsrState current LMSR state
|
||||
/// @param bases_ scaling bases for each token
|
||||
/// @param totalSupply_ current total LP token supply
|
||||
/// @return amountInUsed actual input amount used (excluding fee)
|
||||
/// @return fee fee amount charged
|
||||
/// @return lpMinted LP tokens that would be minted
|
||||
function swapMintAmounts(
|
||||
uint256 inputTokenIndex,
|
||||
uint256 maxAmountIn,
|
||||
uint256 swapFeePpm,
|
||||
LMSRStabilized.State memory lmsrState,
|
||||
uint256[] memory bases_,
|
||||
uint256 totalSupply_
|
||||
) public pure returns (uint256 amountInUsed, uint256 fee, uint256 lpMinted) {
|
||||
require(inputTokenIndex < bases_.length, "swapMintAmounts: idx");
|
||||
require(maxAmountIn > 0, "swapMintAmounts: input zero");
|
||||
require(lmsrState.nAssets > 0, "swapMintAmounts: uninit pool");
|
||||
|
||||
// Compute fee on gross maxAmountIn to get an initial net estimate
|
||||
uint256 feeGuess = 0;
|
||||
uint256 netUintGuess = maxAmountIn;
|
||||
if (swapFeePpm > 0) {
|
||||
feeGuess = (maxAmountIn * swapFeePpm + 999999) / 1000000; // ceil fee
|
||||
netUintGuess = maxAmountIn - feeGuess;
|
||||
}
|
||||
|
||||
// Convert the net guess to internal (floor)
|
||||
int128 netInternalGuess = _uintToInternalFloorPure(netUintGuess, bases_[inputTokenIndex]);
|
||||
require(netInternalGuess > int128(0), "swapMintAmounts: input too small after fee");
|
||||
|
||||
// Use LMSR view to determine actual internal consumed and size-increase (ΔS) for mint
|
||||
(int128 amountInInternalUsed, int128 sizeIncreaseInternal) =
|
||||
LMSRStabilized.swapAmountsForMint(lmsrState.nAssets, lmsrState.kappa, lmsrState.qInternal,
|
||||
inputTokenIndex, netInternalGuess);
|
||||
|
||||
// amountInInternalUsed may be <= netInternalGuess. Convert to uint (ceil) to determine actual transfer
|
||||
amountInUsed = _internalToUintCeilPure(amountInInternalUsed, bases_[inputTokenIndex]);
|
||||
require(amountInUsed > 0, "swapMintAmounts: input zero after internal conversion");
|
||||
|
||||
// Compute fee on the actual used input (ceiling)
|
||||
fee = 0;
|
||||
if (swapFeePpm > 0) {
|
||||
fee = (amountInUsed * swapFeePpm + 999999) / 1000000; // ceil fee
|
||||
}
|
||||
uint256 totalTransfer = amountInUsed + fee;
|
||||
require(totalTransfer > 0 && totalTransfer <= maxAmountIn, "swapMintAmounts: transfer exceeds max");
|
||||
|
||||
// Compute old and new scaled size metrics to determine LP minted
|
||||
int128 oldTotal = _computeSizeMetricPure(lmsrState.qInternal);
|
||||
require(oldTotal > int128(0), "swapMintAmounts: zero total");
|
||||
uint256 oldScaled = ABDKMath64x64.mulu(oldTotal, LP_SCALE);
|
||||
|
||||
int128 newTotal = oldTotal.add(sizeIncreaseInternal);
|
||||
uint256 newScaled = ABDKMath64x64.mulu(newTotal, LP_SCALE);
|
||||
|
||||
if (totalSupply_ == 0) {
|
||||
// If somehow supply zero (shouldn't happen as lmsr.nAssets>0), mint newScaled
|
||||
lpMinted = newScaled;
|
||||
} else {
|
||||
require(oldScaled > 0, "swapMintAmounts: oldScaled zero");
|
||||
uint256 delta = (newScaled > oldScaled) ? (newScaled - oldScaled) : 0;
|
||||
if (delta > 0) {
|
||||
// floor truncation rounds in favor of pool
|
||||
lpMinted = (totalSupply_ * delta) / oldScaled;
|
||||
} else {
|
||||
lpMinted = 0;
|
||||
}
|
||||
}
|
||||
|
||||
require(lpMinted > 0, "swapMintAmounts: zero LP minted");
|
||||
}
|
||||
|
||||
/// @notice Calculate the amounts for a burn swap operation
|
||||
/// @dev This is a pure view function that computes burn swap amounts from provided state
|
||||
/// @param lpAmount amount of LP tokens to burn
|
||||
/// @param inputTokenIndex index of target asset to receive
|
||||
/// @param swapFeePpm fee in parts-per-million
|
||||
/// @param lmsrState current LMSR state
|
||||
/// @param bases_ scaling bases for each token
|
||||
/// @param totalSupply_ current total LP token supply
|
||||
/// @return amountOut amount of target asset that would be received
|
||||
function burnSwapAmounts(
|
||||
uint256 lpAmount,
|
||||
uint256 inputTokenIndex,
|
||||
uint256 swapFeePpm,
|
||||
LMSRStabilized.State memory lmsrState,
|
||||
uint256[] memory bases_,
|
||||
uint256 totalSupply_
|
||||
) public pure returns (uint256 amountOut) {
|
||||
require(inputTokenIndex < bases_.length, "burnSwapAmounts: idx");
|
||||
require(lpAmount > 0, "burnSwapAmounts: zero lp");
|
||||
require(totalSupply_ > 0, "burnSwapAmounts: empty supply");
|
||||
|
||||
// alpha = lpAmount / supply as Q64.64
|
||||
int128 alpha = ABDKMath64x64.divu(lpAmount, totalSupply_) // fraction of total supply to burn
|
||||
.mul(ABDKMath64x64.divu(1000000-swapFeePpm, 1000000)); // adjusted for fee
|
||||
|
||||
// Use LMSR view to compute single-asset payout and burned size-metric
|
||||
(int128 payoutInternal, ) = LMSRStabilized.swapAmountsForBurn(lmsrState.nAssets, lmsrState.kappa, lmsrState.qInternal,
|
||||
inputTokenIndex, alpha);
|
||||
|
||||
// Convert payoutInternal -> uint (floor) to favor pool
|
||||
amountOut = _internalToUintFloorPure(payoutInternal, bases_[inputTokenIndex]);
|
||||
require(amountOut > 0, "burnSwapAmounts: output zero");
|
||||
}
|
||||
|
||||
/// @notice Burn LP tokens then swap the redeemed proportional basket into a single asset `inputTokenIndex` and send to receiver.
|
||||
/// @dev The function burns LP tokens (authorization via allowance if needed), sends the single-asset payout and updates LMSR state.
|
||||
/// @param payer who burns LP tokens
|
||||
/// @param receiver who receives the single asset
|
||||
/// @param lpAmount amount of LP tokens to burn
|
||||
/// @param inputTokenIndex index of target asset to receive
|
||||
/// @param deadline optional deadline
|
||||
/// @param swapFeePpm fee in parts-per-million for this pool (may be used for future fee logic)
|
||||
/// @return amountOutUint uint amount of asset i sent to receiver
|
||||
function burnSwap(
|
||||
address payer,
|
||||
address receiver,
|
||||
uint256 lpAmount,
|
||||
uint256 inputTokenIndex,
|
||||
uint256 deadline,
|
||||
uint256 swapFeePpm
|
||||
) external returns (uint256 amountOutUint, uint256 feeTokenUint) {
|
||||
uint256 n = tokens.length;
|
||||
require(inputTokenIndex < n, "burnSwap: idx");
|
||||
require(lpAmount > 0, "burnSwap: zero lp");
|
||||
require(deadline == 0 || block.timestamp <= deadline, "burnSwap: deadline");
|
||||
|
||||
uint256 supply = _totalSupply;
|
||||
require(supply > 0, "burnSwap: empty supply");
|
||||
require(_balances[payer] >= lpAmount, "burnSwap: insufficient LP");
|
||||
|
||||
// alpha = lpAmount / supply as Q64.64 (adjusted for fee)
|
||||
int128 alpha = ABDKMath64x64.divu(lpAmount, supply) // fraction of total supply to burn
|
||||
.mul(ABDKMath64x64.divu(1000000-swapFeePpm, 1000000)); // adjusted for fee
|
||||
|
||||
// Use LMSR view to compute single-asset payout and burned size-metric
|
||||
(int128 payoutInternal, ) = lmsr.swapAmountsForBurn(inputTokenIndex, alpha);
|
||||
|
||||
// Convert payoutInternal -> uint (floor) to favor pool
|
||||
amountOutUint = _internalToUintFloor(payoutInternal, bases[inputTokenIndex]);
|
||||
require(amountOutUint > 0, "burnSwap: output zero");
|
||||
|
||||
// Compute gross payout (no swap fee) so we can determine token-side fee = gross - net
|
||||
int128 alphaGross = ABDKMath64x64.divu(lpAmount, supply); // gross fraction (no swap fee)
|
||||
(int128 payoutGrossInternal, ) = lmsr.swapAmountsForBurn(inputTokenIndex, alphaGross);
|
||||
uint256 payoutGrossUint = _internalToUintFloor(payoutGrossInternal, bases[inputTokenIndex]);
|
||||
feeTokenUint = (payoutGrossUint > amountOutUint) ? (payoutGrossUint - amountOutUint) : 0;
|
||||
|
||||
// Transfer the payout to receiver
|
||||
tokens[inputTokenIndex].safeTransfer(receiver, amountOutUint);
|
||||
|
||||
// Burn LP tokens from payer (authorization via allowance)
|
||||
if (msg.sender != payer) {
|
||||
uint256 allowed = _allowances[payer][msg.sender];
|
||||
require(allowed >= lpAmount, "burnSwap: allowance insufficient");
|
||||
_approve(payer, msg.sender, allowed - lpAmount);
|
||||
}
|
||||
_burn(payer, lpAmount);
|
||||
|
||||
// Update cached balances by reading on-chain balances for all tokens
|
||||
int128[] memory newQInternal = new int128[](n);
|
||||
for (uint256 idx = 0; idx < n; idx++) {
|
||||
uint256 bal = IERC20(tokens[idx]).balanceOf(address(this));
|
||||
// implementation writes raw onchain values; wrapper will set effective cached values
|
||||
cachedUintBalances[idx] = bal;
|
||||
newQInternal[idx] = _uintToInternalFloor(bal, bases[idx]);
|
||||
}
|
||||
|
||||
// Emit BurnSwap with public-facing info only (do not expose ΔS or LP burned)
|
||||
emit BurnSwap(payer, receiver, inputTokenIndex, amountOutUint);
|
||||
|
||||
// If entire pool drained, deinit; else update proportionally
|
||||
bool allZero = true;
|
||||
for (uint256 idx = 0; idx < n; idx++) {
|
||||
if (newQInternal[idx] != int128(0)) { allZero = false; break; }
|
||||
}
|
||||
if (allZero) {
|
||||
lmsr.deinit();
|
||||
} else {
|
||||
lmsr.updateForProportionalChange(newQInternal);
|
||||
}
|
||||
|
||||
emit Burn(payer, receiver, new uint256[](n), lpAmount);
|
||||
return (amountOutUint, feeTokenUint);
|
||||
}
|
||||
|
||||
/// @notice Pure version of _uintToInternalFloor for use in view functions
|
||||
function _uintToInternalFloorPure(uint256 amount, uint256 base) internal pure returns (int128) {
|
||||
// amount / base as Q64.64, floored
|
||||
return ABDKMath64x64.divu(amount, base);
|
||||
}
|
||||
|
||||
/// @notice Pure version of _internalToUintCeil for use in view functions
|
||||
function _internalToUintCeilPure(int128 amount, uint256 base) internal pure returns (uint256) {
|
||||
// Convert Q64.64 to uint with ceiling: ceil(amount * base)
|
||||
// Use mulu which floors, then add remainder check for ceiling
|
||||
uint256 floored = ABDKMath64x64.mulu(amount, base);
|
||||
// Check if there's a fractional part by computing amount * base - floored
|
||||
int128 baseQ64 = ABDKMath64x64.fromUInt(base);
|
||||
int128 flooredQ64 = ABDKMath64x64.fromUInt(floored);
|
||||
int128 product = amount.mul(baseQ64);
|
||||
if (product > flooredQ64) {
|
||||
return floored + 1; // Ceiling
|
||||
}
|
||||
return floored;
|
||||
}
|
||||
|
||||
/// @notice Pure version of _internalToUintFloor for use in view functions
|
||||
function _internalToUintFloorPure(int128 amount, uint256 base) internal pure returns (uint256) {
|
||||
// Convert Q64.64 to uint with floor: floor(amount * base)
|
||||
return ABDKMath64x64.mulu(amount, base);
|
||||
}
|
||||
|
||||
/// @notice Pure version of _computeSizeMetric for use in view functions
|
||||
function _computeSizeMetricPure(int128[] memory qInternal) internal pure returns (int128) {
|
||||
int128 sum = int128(0);
|
||||
for (uint256 i = 0; i < qInternal.length; i++) {
|
||||
sum = sum.add(qInternal[i]);
|
||||
}
|
||||
return sum;
|
||||
}
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user