a13a649b77
Aere Network public source. Everything here can be checked against the live chain (chain id 2800, https://rpc.aere.network). Scope note, stated up front rather than buried: consensus on chain 2800 is classical secp256k1 ECDSA QBFT. The post-quantum work in this repository is at the signature, precompile, account and transport layers. Nothing here makes the consensus post-quantum, and no document in it should be read as claiming so.
333 lines
16 KiB
Solidity
333 lines
16 KiB
Solidity
// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.19;
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/**
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* @title AereSwapRouter
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* @notice Periphery router for AereSwap constant-product AMM (factory + pairs
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* already deployed). ABI-compatible with the canonical x*y=k router
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* interface so existing wallets, aggregators, and SDKs work against
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* AERE without code changes.
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* Adds:
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* - addLiquidity (with deadline + slippage min-amounts)
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* - addLiquidityAERE (native AERE auto-wraps to WAERE)
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* - removeLiquidity / removeLiquidityAERE
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* - swapExactTokensForTokens
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* - swapExactAEREForTokens / swapExactTokensForAERE (auto-wrap/unwrap)
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* - quote / getAmountOut / getAmountIn / getAmountsOut / getAmountsIn helpers
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*
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* Designed to plug into the already-deployed AereSwapFactory
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* at 0xf0a8df7BDc25721892475B21271e52D77B0e84DC.
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*/
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interface IERC20 {
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function transfer(address to, uint256 amount) external returns (bool);
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function transferFrom(address from, address to, uint256 amount) external returns (bool);
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function balanceOf(address account) external view returns (uint256);
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function approve(address spender, uint256 amount) external returns (bool);
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}
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interface IWAERE {
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function deposit() external payable;
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function withdraw(uint256) external;
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function transfer(address to, uint256 amount) external returns (bool);
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function balanceOf(address) external view returns (uint256);
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}
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interface IAereSwapFactory {
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function getPair(address tokenA, address tokenB) external view returns (address pair);
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function createPair(address tokenA, address tokenB) external returns (address pair);
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function WAERE() external view returns (address);
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}
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interface IAereSwapPair {
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function token0() external view returns (address);
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function token1() external view returns (address);
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function getReserves() external view returns (uint112 reserve0, uint112 reserve1, uint32 ts);
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function mint(address to) external returns (uint256 liquidity);
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function burn(address to) external returns (uint256 amount0, uint256 amount1);
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function swap(uint256 amount0Out, uint256 amount1Out, address to) external;
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function totalSupply() external view returns (uint256);
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function balanceOf(address) external view returns (uint256);
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function transfer(address to, uint256 amount) external returns (bool);
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function transferFrom(address from, address to, uint256 amount) external returns (bool);
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}
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contract AereSwapRouter {
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address public immutable factory;
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address public immutable WAERE;
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modifier ensure(uint256 deadline) {
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require(block.timestamp <= deadline, "AereRouter: EXPIRED");
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_;
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}
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constructor(address _factory, address _WAERE) {
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factory = _factory;
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WAERE = _WAERE;
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}
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// Allow this contract to receive native AERE from WAERE.withdraw().
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receive() external payable {
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require(msg.sender == WAERE, "AereRouter: only WAERE");
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}
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// ═════════════════════════════════════════════════════════════════════
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// LIQUIDITY
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// ═════════════════════════════════════════════════════════════════════
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function _addLiquidity(
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address tokenA,
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address tokenB,
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uint256 amountADesired,
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uint256 amountBDesired,
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uint256 amountAMin,
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uint256 amountBMin
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) internal returns (uint256 amountA, uint256 amountB) {
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if (IAereSwapFactory(factory).getPair(tokenA, tokenB) == address(0)) {
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IAereSwapFactory(factory).createPair(tokenA, tokenB);
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}
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(uint256 rA, uint256 rB) = getReserves(factory, tokenA, tokenB);
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if (rA == 0 && rB == 0) {
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(amountA, amountB) = (amountADesired, amountBDesired);
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} else {
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uint256 amountBOptimal = quote(amountADesired, rA, rB);
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if (amountBOptimal <= amountBDesired) {
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require(amountBOptimal >= amountBMin, "AereRouter: INSUFFICIENT_B_AMOUNT");
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(amountA, amountB) = (amountADesired, amountBOptimal);
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} else {
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uint256 amountAOptimal = quote(amountBDesired, rB, rA);
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assert(amountAOptimal <= amountADesired);
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require(amountAOptimal >= amountAMin, "AereRouter: INSUFFICIENT_A_AMOUNT");
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(amountA, amountB) = (amountAOptimal, amountBDesired);
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}
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}
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}
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function addLiquidity(
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address tokenA,
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address tokenB,
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uint256 amountADesired,
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uint256 amountBDesired,
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uint256 amountAMin,
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uint256 amountBMin,
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address to,
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uint256 deadline
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) external ensure(deadline) returns (uint256 amountA, uint256 amountB, uint256 liquidity) {
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(amountA, amountB) = _addLiquidity(tokenA, tokenB, amountADesired, amountBDesired, amountAMin, amountBMin);
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address pair = pairFor(factory, tokenA, tokenB);
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_safeTransferFrom(tokenA, msg.sender, pair, amountA);
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_safeTransferFrom(tokenB, msg.sender, pair, amountB);
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liquidity = IAereSwapPair(pair).mint(to);
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}
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function addLiquidityAERE(
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address token,
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uint256 amountTokenDesired,
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uint256 amountTokenMin,
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uint256 amountAEREMin,
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address to,
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uint256 deadline
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)
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external
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payable
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ensure(deadline)
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returns (uint256 amountToken, uint256 amountAERE, uint256 liquidity)
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{
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(amountToken, amountAERE) = _addLiquidity(
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token, WAERE, amountTokenDesired, msg.value, amountTokenMin, amountAEREMin
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);
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address pair = pairFor(factory, token, WAERE);
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_safeTransferFrom(token, msg.sender, pair, amountToken);
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IWAERE(WAERE).deposit{ value: amountAERE }();
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require(IWAERE(WAERE).transfer(pair, amountAERE), "AereRouter: WAERE_TRANSFER_FAIL");
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liquidity = IAereSwapPair(pair).mint(to);
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// refund any dust
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if (msg.value > amountAERE) _safeTransferAERE(msg.sender, msg.value - amountAERE);
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}
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function removeLiquidity(
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address tokenA,
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address tokenB,
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uint256 liquidity,
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uint256 amountAMin,
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uint256 amountBMin,
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address to,
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uint256 deadline
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) public ensure(deadline) returns (uint256 amountA, uint256 amountB) {
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address pair = pairFor(factory, tokenA, tokenB);
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require(IAereSwapPair(pair).transferFrom(msg.sender, pair, liquidity), "AereRouter: LP_TRANSFER_FAIL");
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(uint256 amount0, uint256 amount1) = IAereSwapPair(pair).burn(to);
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(address t0, ) = sortTokens(tokenA, tokenB);
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(amountA, amountB) = tokenA == t0 ? (amount0, amount1) : (amount1, amount0);
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require(amountA >= amountAMin, "AereRouter: INSUFFICIENT_A_AMOUNT");
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require(amountB >= amountBMin, "AereRouter: INSUFFICIENT_B_AMOUNT");
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}
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function removeLiquidityAERE(
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address token,
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uint256 liquidity,
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uint256 amountTokenMin,
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uint256 amountAEREMin,
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address to,
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uint256 deadline
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) external ensure(deadline) returns (uint256 amountToken, uint256 amountAERE) {
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(amountToken, amountAERE) = removeLiquidity(
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token, WAERE, liquidity, amountTokenMin, amountAEREMin, address(this), deadline
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);
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_safeTransfer(token, to, amountToken);
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IWAERE(WAERE).withdraw(amountAERE);
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_safeTransferAERE(to, amountAERE);
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}
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// ═════════════════════════════════════════════════════════════════════
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// SWAPS
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// ═════════════════════════════════════════════════════════════════════
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function _swap(uint256[] memory amounts, address[] memory path, address _to) internal {
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for (uint256 i = 0; i < path.length - 1; i++) {
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(address input, address output) = (path[i], path[i + 1]);
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(address t0, ) = sortTokens(input, output);
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uint256 amountOut = amounts[i + 1];
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(uint256 amount0Out, uint256 amount1Out) =
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input == t0 ? (uint256(0), amountOut) : (amountOut, uint256(0));
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address to = i < path.length - 2 ? pairFor(factory, output, path[i + 2]) : _to;
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IAereSwapPair(pairFor(factory, input, output)).swap(amount0Out, amount1Out, to);
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}
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}
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function swapExactTokensForTokens(
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uint256 amountIn,
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uint256 amountOutMin,
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address[] calldata path,
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address to,
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uint256 deadline
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) external ensure(deadline) returns (uint256[] memory amounts) {
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amounts = getAmountsOut(factory, amountIn, path);
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require(amounts[amounts.length - 1] >= amountOutMin, "AereRouter: INSUFFICIENT_OUTPUT_AMOUNT");
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_safeTransferFrom(path[0], msg.sender, pairFor(factory, path[0], path[1]), amounts[0]);
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_swap(amounts, path, to);
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}
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function swapExactAEREForTokens(
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uint256 amountOutMin,
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address[] calldata path,
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address to,
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uint256 deadline
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) external payable ensure(deadline) returns (uint256[] memory amounts) {
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require(path[0] == WAERE, "AereRouter: INVALID_PATH");
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amounts = getAmountsOut(factory, msg.value, path);
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require(amounts[amounts.length - 1] >= amountOutMin, "AereRouter: INSUFFICIENT_OUTPUT_AMOUNT");
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IWAERE(WAERE).deposit{ value: amounts[0] }();
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require(IWAERE(WAERE).transfer(pairFor(factory, path[0], path[1]), amounts[0]), "AereRouter: WAERE_FAIL");
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_swap(amounts, path, to);
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}
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function swapExactTokensForAERE(
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uint256 amountIn,
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uint256 amountOutMin,
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address[] calldata path,
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address to,
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uint256 deadline
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) external ensure(deadline) returns (uint256[] memory amounts) {
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require(path[path.length - 1] == WAERE, "AereRouter: INVALID_PATH");
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amounts = getAmountsOut(factory, amountIn, path);
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require(amounts[amounts.length - 1] >= amountOutMin, "AereRouter: INSUFFICIENT_OUTPUT_AMOUNT");
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_safeTransferFrom(path[0], msg.sender, pairFor(factory, path[0], path[1]), amounts[0]);
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_swap(amounts, path, address(this));
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IWAERE(WAERE).withdraw(amounts[amounts.length - 1]);
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_safeTransferAERE(to, amounts[amounts.length - 1]);
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}
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// ═════════════════════════════════════════════════════════════════════
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// LIBRARY (constant-product AMM math, inlined)
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// ═════════════════════════════════════════════════════════════════════
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function sortTokens(address tokenA, address tokenB) public pure returns (address token0, address token1) {
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require(tokenA != tokenB, "AereRouter: IDENTICAL_ADDRESSES");
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(token0, token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
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require(token0 != address(0), "AereRouter: ZERO_ADDRESS");
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}
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function pairFor(address _factory, address tokenA, address tokenB) public view returns (address pair) {
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pair = IAereSwapFactory(_factory).getPair(tokenA, tokenB);
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require(pair != address(0), "AereRouter: PAIR_NOT_EXISTS");
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}
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function getReserves(address _factory, address tokenA, address tokenB)
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public view returns (uint256 reserveA, uint256 reserveB)
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{
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(address t0, ) = sortTokens(tokenA, tokenB);
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(uint112 r0, uint112 r1, ) = IAereSwapPair(pairFor(_factory, tokenA, tokenB)).getReserves();
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(reserveA, reserveB) = tokenA == t0 ? (uint256(r0), uint256(r1)) : (uint256(r1), uint256(r0));
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}
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function quote(uint256 amountA, uint256 reserveA, uint256 reserveB) public pure returns (uint256 amountB) {
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require(amountA > 0, "AereRouter: INSUFFICIENT_AMOUNT");
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require(reserveA > 0 && reserveB > 0, "AereRouter: INSUFFICIENT_LIQUIDITY");
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amountB = (amountA * reserveB) / reserveA;
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}
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// 0.3% fee — matches AereSwapPair.swap() math (1000-3 = 997 numerator).
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function getAmountOut(uint256 amountIn, uint256 reserveIn, uint256 reserveOut) public pure returns (uint256 amountOut) {
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require(amountIn > 0, "AereRouter: INSUFFICIENT_INPUT");
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require(reserveIn > 0 && reserveOut > 0, "AereRouter: INSUFFICIENT_LIQUIDITY");
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uint256 amountInWithFee = amountIn * 997;
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uint256 numerator = amountInWithFee * reserveOut;
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uint256 denominator = reserveIn * 1000 + amountInWithFee;
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amountOut = numerator / denominator;
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}
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function getAmountIn(uint256 amountOut, uint256 reserveIn, uint256 reserveOut) public pure returns (uint256 amountIn) {
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require(amountOut > 0, "AereRouter: INSUFFICIENT_OUTPUT");
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require(reserveIn > 0 && reserveOut > 0, "AereRouter: INSUFFICIENT_LIQUIDITY");
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uint256 numerator = reserveIn * amountOut * 1000;
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uint256 denominator = (reserveOut - amountOut) * 997;
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amountIn = (numerator / denominator) + 1;
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}
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function getAmountsOut(address _factory, uint256 amountIn, address[] memory path)
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public view returns (uint256[] memory amounts)
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{
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require(path.length >= 2, "AereRouter: INVALID_PATH");
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amounts = new uint256[](path.length);
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amounts[0] = amountIn;
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for (uint256 i = 0; i < path.length - 1; i++) {
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(uint256 rI, uint256 rO) = getReserves(_factory, path[i], path[i + 1]);
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amounts[i + 1] = getAmountOut(amounts[i], rI, rO);
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}
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}
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function getAmountsIn(address _factory, uint256 amountOut, address[] memory path)
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public view returns (uint256[] memory amounts)
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{
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require(path.length >= 2, "AereRouter: INVALID_PATH");
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amounts = new uint256[](path.length);
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amounts[amounts.length - 1] = amountOut;
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for (uint256 i = path.length - 1; i > 0; i--) {
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(uint256 rI, uint256 rO) = getReserves(_factory, path[i - 1], path[i]);
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amounts[i - 1] = getAmountIn(amounts[i], rI, rO);
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}
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}
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// ═════════════════════════════════════════════════════════════════════
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// SAFE TRANSFERS
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// ═════════════════════════════════════════════════════════════════════
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function _safeTransfer(address token, address to, uint256 value) private {
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(bool ok, bytes memory data) =
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token.call(abi.encodeWithSelector(IERC20.transfer.selector, to, value));
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require(ok && (data.length == 0 || abi.decode(data, (bool))), "AereRouter: TRANSFER_FAILED");
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}
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function _safeTransferFrom(address token, address from, address to, uint256 value) private {
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(bool ok, bytes memory data) =
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token.call(abi.encodeWithSelector(IERC20.transferFrom.selector, from, to, value));
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require(ok && (data.length == 0 || abi.decode(data, (bool))), "AereRouter: TRANSFER_FROM_FAILED");
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}
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function _safeTransferAERE(address to, uint256 value) private {
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(bool ok, ) = to.call{ value: value }("");
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require(ok, "AereRouter: AERE_TRANSFER_FAILED");
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}
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}
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