diff --git a/contracts/AMM/UniswapV2/Setup.sol b/contracts/AMM/UniswapV2/Setup.sol
new file mode 100644
index 0000000..38cd782
--- /dev/null
+++ b/contracts/AMM/UniswapV2/Setup.sol
@@ -0,0 +1,140 @@
+pragma solidity ^0.6.0;
+pragma experimental ABIEncoderV2;
+
+import "./uni-v2/UniswapV2ERC20.sol";
+import "./uni-v2/UniswapV2Pair.sol";
+import "./uni-v2/UniswapV2Factory.sol";
+import "./uni-v2/UniswapV2Router01.sol";
+import "./libraries/UniswapV2Library.sol";
+import "./libraries/WETH.sol";
+import "./libraries/SafeMath.sol";
+
+interface IHevm {
+ // Set block.timestamp to newTimestamp
+ function warp(uint256 newTimestamp) external;
+
+ // Set block.number to newNumber
+ function roll(uint256 newNumber) external;
+
+ // Loads a storage slot from an address
+ function load(address where, bytes32 slot) external returns (bytes32);
+
+ // Stores a value to an address' storage slot
+ function store(address where, bytes32 slot, bytes32 value) external;
+
+ // Signs data (privateKey, digest) => (r, v, s)
+ function sign(
+ uint256 privateKey,
+ bytes32 digest
+ ) external returns (uint8 r, bytes32 v, bytes32 s);
+
+ // Gets address for a given private key
+ function addr(uint256 privateKey) external returns (address addr);
+
+ // Performs a foreign function call via terminal
+ function ffi(
+ string[] calldata inputs
+ ) external returns (bytes memory result);
+
+ // Performs the next smart contract call with specified `msg.sender`
+ function prank(address newSender) external;
+}
+
+contract Users {
+ function proxy(
+ address target,
+ bytes memory data
+ ) public returns (bool success, bytes memory retData) {
+ return target.call(data);
+ }
+}
+
+contract Setup {
+ using SafeMath for uint256;
+
+ IHevm public constant hevm =
+ IHevm(0x7109709ECfa91a80626fF3989D68f67F5b1DD12D);
+
+ UniswapV2Factory factory;
+ UniswapV2Pair pair;
+ UniswapV2ERC20 testToken1;
+ UniswapV2ERC20 testToken2;
+ UniswapV2Router01 router;
+ WETH9 weth;
+ Users user;
+ bool completed;
+
+ constructor() public {
+ weth = new WETH9();
+ testToken1 = new UniswapV2ERC20();
+ testToken2 = new UniswapV2ERC20();
+ factory = new UniswapV2Factory(address(this));
+ pair = UniswapV2Pair(
+ factory.createPair(address(testToken1), address(testToken2))
+ );
+ router = new UniswapV2Router01(address(factory), address(weth));
+
+ // Sort the test tokens we just created, for clarity when writing invariant tests later
+ (address testTokenA, address testTokenB) = UniswapV2Library.sortTokens(
+ address(testToken1),
+ address(testToken2)
+ );
+ testToken1 = UniswapV2ERC20(testTokenA);
+ testToken2 = UniswapV2ERC20(testTokenB);
+ user = new Users();
+ user.proxy(
+ address(testToken1),
+ abi.encodeWithSelector(
+ testToken1.approve.selector,
+ address(pair),
+ uint(-1)
+ )
+ );
+ user.proxy(
+ address(testToken2),
+ abi.encodeWithSelector(
+ testToken2.approve.selector,
+ address(pair),
+ uint(-1)
+ )
+ );
+ user.proxy(
+ address(testToken1),
+ abi.encodeWithSelector(
+ testToken1.approve.selector,
+ address(router),
+ uint(-1)
+ )
+ );
+ user.proxy(
+ address(testToken2),
+ abi.encodeWithSelector(
+ testToken2.approve.selector,
+ address(router),
+ uint(-1)
+ )
+ );
+ user.proxy(
+ address(pair),
+ abi.encodeWithSelector(
+ pair.approve.selector,
+ address(router),
+ uint(-1)
+ )
+ );
+ }
+
+ function _init(uint amount1, uint amount2) internal {
+ testToken1.mint(address(user), amount1);
+ testToken2.mint(address(user), amount2);
+ completed = true;
+ }
+
+ function _between(
+ uint val,
+ uint low,
+ uint high
+ ) internal pure returns (uint) {
+ return low + (val % (high - low + 1));
+ }
+}
diff --git a/contracts/AMM/UniswapV2/UniswapV2PropertyTests.sol b/contracts/AMM/UniswapV2/UniswapV2PropertyTests.sol
new file mode 100644
index 0000000..ae1b701
--- /dev/null
+++ b/contracts/AMM/UniswapV2/UniswapV2PropertyTests.sol
@@ -0,0 +1,498 @@
+pragma solidity ^0.6.0;
+
+import "./Setup.sol";
+import "./libraries/UniswapV2Library.sol";
+
+contract CryticUniswapV2PropertyTests is Setup {
+ event AmountsIn(uint amount0, uint amount1);
+ event AmountsOut(uint amount0, uint amount1);
+ event BalancesBefore(uint balance0, uint balance1);
+ event BalancesAfter(uint balance0, uint balance1);
+ event ReservesBefore(uint reserve0, uint reserve1);
+ event ReservesAfter(uint reserve0, uint reserve1);
+ event KValues(uint256 a, uint256 b);
+
+ function _provideLiquidity(
+ uint256 amount0,
+ uint256 amount1
+ ) internal returns (uint256, uint256, bool) {
+ // Preconditions:
+ amount0 = _between(amount0, 1000, uint(-1));
+ amount1 = _between(amount1, 1000, uint(-1));
+
+ if (!completed) {
+ _init(amount0, amount1);
+ }
+
+ // Transfer tokens to UniswapV2Pair contract
+ (bool success1, ) = user.proxy(
+ address(testToken1),
+ abi.encodeWithSelector(
+ testToken1.transfer.selector,
+ address(pair),
+ amount0
+ )
+ );
+ (bool success2, ) = user.proxy(
+ address(testToken2),
+ abi.encodeWithSelector(
+ testToken2.transfer.selector,
+ address(pair),
+ amount1
+ )
+ );
+ require(success1 && success2);
+
+ // Action:
+ (bool success, ) = user.proxy(
+ address(pair),
+ abi.encodeWithSelector(
+ bytes4(keccak256("mint(address)")),
+ address(user)
+ )
+ );
+
+ return (amount0, amount1, success);
+ }
+
+ function _burnLiquidity(
+ uint256 amount,
+ uint256 balance
+ ) internal returns (uint256, bool) {
+ amount = _between(amount, 1, balance);
+
+ // Transfer LP tokens to UniswapV2Pair contract
+ (bool success1, ) = user.proxy(
+ address(pair),
+ abi.encodeWithSelector(
+ pair.transfer.selector,
+ address(pair),
+ amount
+ )
+ );
+
+ // Action:
+ (bool success, ) = user.proxy(
+ address(pair),
+ abi.encodeWithSelector(
+ bytes4(keccak256("burn(address)")),
+ address(user)
+ )
+ );
+
+ return (amount, success);
+ }
+
+ function _swap(
+ bool zeroForOne,
+ uint256 amount0,
+ uint256 amount1,
+ bool exact
+ ) internal returns (bool, uint256) {
+ if (!completed) {
+ _init(amount0, amount1);
+ }
+
+ uint balance0Before = testToken1.balanceOf(address(user));
+ uint balance1Before = testToken2.balanceOf(address(user));
+
+ (uint reserve0Before, uint reserve1Before, ) = pair.getReserves();
+ uint amount0In = amount0;
+ uint amount1In = amount1;
+
+ if (!exact) {
+ amount0In = _between(amount0, 1, balance0Before);
+ amount1In = _between(amount1, 1, balance1Before);
+ }
+
+ uint amount0Out;
+ uint amount1Out;
+
+ /**
+ * Precondition of UniswapV2Pair.swap is that we transfer the token we are swapping in first.
+ * So, we pick the larger of the two input amounts to transfer, and also use
+ * the Uniswap library to determine how much of the other we will receive in return.
+ */
+ if (zeroForOne) {
+ amount1In = 0;
+ amount1Out = UniswapV2Library.getAmountOut(
+ amount0In,
+ reserve0Before,
+ reserve1Before
+ );
+ require(amount1Out > 0);
+
+ (bool success1, ) = user.proxy(
+ address(testToken1),
+ abi.encodeWithSelector(
+ testToken1.transfer.selector,
+ address(pair),
+ amount0In
+ )
+ );
+ require(success1);
+ } else {
+ amount0In = 0;
+ amount0Out = UniswapV2Library.getAmountOut(
+ amount1In,
+ reserve1Before,
+ reserve0Before
+ );
+ require(amount0Out > 0);
+
+ (bool success1, ) = user.proxy(
+ address(testToken2),
+ abi.encodeWithSelector(
+ testToken2.transfer.selector,
+ address(pair),
+ amount1In
+ )
+ );
+ require(success1);
+ }
+
+ // Action:
+ (bool success2, ) = user.proxy(
+ address(pair),
+ abi.encodeWithSelector(
+ pair.swap.selector,
+ amount0Out,
+ amount1Out,
+ address(user),
+ ""
+ )
+ );
+ return (success2, zeroForOne ? amount1Out : amount0Out);
+ }
+
+ function _getTokenPrice(
+ bool zeroForOne,
+ uint256 inputAmount
+ ) internal returns (uint256 amountOut) {
+ (uint reserve0, uint reserve1, ) = pair.getReserves();
+ amountOut = UniswapV2Library.getAmountOut(
+ inputAmount,
+ zeroForOne ? reserve0 : reserve1,
+ zeroForOne ? reserve1 : reserve0
+ );
+ }
+
+ // Providing liquidity
+
+ function test_UniV2_provideLiquidity_IncreasesK(
+ uint256 amount0,
+ uint256 amount1
+ ) public {
+ // State before
+ (uint reserve0Before, uint reserve1Before, ) = pair.getReserves();
+ uint kBefore = reserve0Before * reserve1Before;
+ bool success;
+
+ (amount0, amount1, success) = _provideLiquidity(amount0, amount1);
+
+ // Postconditions:
+ if (success) {
+ (uint reserve0After, uint reserve1After, ) = pair.getReserves();
+ uint kAfter = reserve0After * reserve1After;
+ assert(kBefore < kAfter);
+ }
+ }
+
+ function test_UniV2_provideLiquidity_IncreasesLPSupply(
+ uint256 amount0,
+ uint256 amount1
+ ) public {
+ // State before
+ uint256 lpTokenSupplyBefore = pair.totalSupply();
+ bool success;
+
+ (amount0, amount1, success) = _provideLiquidity(amount0, amount1);
+
+ // Postconditions:
+ if (success) {
+ uint256 lpTokenSupplyAfter = pair.totalSupply();
+
+ assert(lpTokenSupplyBefore < lpTokenSupplyAfter);
+ }
+ }
+
+ function test_UniV2_provideLiquidity_tokenPriceUnchanged(
+ uint256 amount0,
+ uint256 amount1,
+ bool zeroForOne,
+ uint256 amountIn
+ ) public {
+ bool success;
+ UniswapV2ERC20 inToken = zeroForOne ? testToken1 : testToken2;
+ uint256 actualAmountIn = _between(
+ amountIn,
+ 1,
+ inToken.balanceOf(address(user))
+ );
+ uint256 amountOutBefore = _getTokenPrice(zeroForOne, actualAmountIn);
+
+ (amount0, amount1, success) = _provideLiquidity(amount0, amount1);
+
+ if (success) {
+ uint256 amountOutAfter = _getTokenPrice(zeroForOne, actualAmountIn);
+
+ emit AmountsIn(amountOutBefore, amountOutAfter);
+ assert(amountOutBefore == amountOutAfter);
+ }
+ }
+
+ function test_UniV2_provideLiquidity_IncreaseReserves(
+ uint256 amount0,
+ uint256 amount1
+ ) public {
+ bool success;
+
+ (uint reserve0Before, uint reserve1Before, ) = pair.getReserves();
+
+ (amount0, amount1, success) = _provideLiquidity(amount0, amount1);
+
+ // Postconditions:
+ if (success) {
+ (uint reserve0After, uint reserve1After, ) = pair.getReserves();
+
+ assert(reserve0Before < reserve0After);
+ assert(reserve1Before < reserve1After);
+ }
+ }
+
+ function test_UniV2_provideLiquidity_IncreaseUserLPBalance(
+ uint256 amount0,
+ uint256 amount1
+ ) public {
+ bool success;
+ uint lpTokenBalanceBefore = pair.balanceOf(address(user));
+
+ (amount0, amount1, success) = _provideLiquidity(amount0, amount1);
+
+ if (success) {
+ uint lpTokenBalanceAfter = pair.balanceOf(address(user));
+
+ assert(lpTokenBalanceBefore < lpTokenBalanceAfter);
+ }
+ }
+
+ // Removing liquidity
+
+ function test_UniV2_removeLiquidity_DecreaseK(uint256 amount) public {
+ pair.sync();
+ // Preconditions
+ bool success;
+ uint lpTokenBalanceBefore = pair.balanceOf(address(user));
+ require(lpTokenBalanceBefore > 0);
+
+ (uint reserve0Before, uint reserve1Before, ) = pair.getReserves();
+ uint kBefore = reserve0Before * reserve1Before;
+
+ // Burn liquidity
+ (amount, success) = _burnLiquidity(amount, lpTokenBalanceBefore);
+
+ // Postconditions
+ if (success) {
+ (uint reserve0After, uint reserve1After, ) = pair.getReserves();
+ uint kAfter = reserve0After * reserve1After;
+ emit KValues(kBefore, kAfter);
+ assert(kBefore > kAfter);
+ }
+ }
+
+ function test_UniV2_removeLiquidity_DecreaseLPSupply(
+ uint256 amount
+ ) public {
+ pair.sync();
+ // Preconditions
+ bool success;
+ uint lpTokenBalanceBefore = pair.balanceOf(address(user));
+ require(lpTokenBalanceBefore > 0);
+
+ uint256 supplyBefore = pair.totalSupply();
+
+ // Burn liquidity
+ (amount, success) = _burnLiquidity(amount, lpTokenBalanceBefore);
+
+ // Postconditions
+ if (success) {
+ uint256 supplyAfter = pair.totalSupply();
+
+ assert(supplyAfter < supplyBefore);
+ }
+ }
+
+ function test_UniV2_removeLiquidity_tokenPriceUnchanged(
+ uint256 amount,
+ bool zeroForOne,
+ uint256 amountIn
+ ) public {
+ bool success;
+ uint lpTokenBalanceBefore = pair.balanceOf(address(user));
+ require(lpTokenBalanceBefore > 0);
+
+ UniswapV2ERC20 inToken = zeroForOne ? testToken1 : testToken2;
+ uint256 actualAmountIn = _between(
+ amountIn,
+ 1,
+ inToken.balanceOf(address(user))
+ );
+ uint256 amountOutBefore = _getTokenPrice(zeroForOne, actualAmountIn);
+
+ // Burn liquidity
+ (amount, success) = _burnLiquidity(amount, lpTokenBalanceBefore);
+
+ if (success) {
+ uint256 amountOutAfter = _getTokenPrice(zeroForOne, actualAmountIn);
+
+ emit AmountsIn(amountOutBefore, amountOutAfter);
+ assert(amountOutBefore == amountOutAfter);
+ }
+ }
+
+ function test_UniV2_removeLiquidity_DecreaseReserves(
+ uint256 amount
+ ) public {
+ pair.sync();
+
+ // Preconditions
+ bool success;
+ uint lpTokenBalanceBefore = pair.balanceOf(address(user));
+ require(lpTokenBalanceBefore > 0);
+
+ (uint reserve0Before, uint reserve1Before, ) = pair.getReserves();
+
+ // Burn liquidity
+ (amount, success) = _burnLiquidity(amount, lpTokenBalanceBefore);
+
+ // Postconditions
+ if (success) {
+ (uint reserve0After, uint reserve1After, ) = pair.getReserves();
+ assert(reserve0Before > reserve0After);
+ assert(reserve1Before > reserve1After);
+ }
+ }
+
+ function test_UniV2_removeLiquidity_DecreaseUserLPBalance(
+ uint256 amount
+ ) public {
+ pair.sync();
+
+ // Preconditions
+ bool success;
+ uint lpTokenBalanceBefore = pair.balanceOf(address(user));
+ require(lpTokenBalanceBefore > 0);
+
+ // Burn liquidity
+ (amount, success) = _burnLiquidity(amount, lpTokenBalanceBefore);
+
+ // Postconditions
+ if (success) {
+ uint lpTokenBalanceAfter = pair.balanceOf(address(user));
+
+ assert(lpTokenBalanceBefore > lpTokenBalanceAfter);
+ }
+ }
+
+ // Swapping
+ function test_UniV2_swap_DoesNotDecreaseK(
+ bool zeroForOne,
+ uint256 amount0,
+ uint256 amount1
+ ) public {
+ pair.skim(address(this));
+
+ require(zeroForOne ? amount0 > 0 : amount1 > 0);
+ (uint reserve0Before, uint reserve1Before, ) = pair.getReserves();
+ require(reserve0Before > 0 && reserve1Before > 0);
+ uint kBefore = reserve0Before * reserve1Before;
+
+ (bool success, ) = _swap(zeroForOne, amount0, amount1, false);
+
+ if (success) {
+ (uint reserve0After, uint reserve1After, ) = pair.getReserves();
+ uint kAfter = reserve0After * reserve1After;
+ assert(kAfter >= kBefore);
+ }
+ }
+
+ function test_UniV2_swap_TwoWaySwapDoesNotResultInProfit(
+ bool zeroForOne,
+ uint256 amountIn
+ ) public {
+ (uint reserve0Before, uint reserve1Before, ) = pair.getReserves();
+ require(reserve0Before > 0 && reserve1Before > 0);
+
+ uint256 balanceBefore0 = testToken1.balanceOf(address(user));
+ uint256 balanceBefore1 = testToken2.balanceOf(address(user));
+ uint realAmountIn = _between(amountIn, 1, zeroForOne ? balanceBefore0 : balanceBefore1);
+
+ (bool success1, uint256 amountOut) = _swap(zeroForOne, amountIn, amountIn, false);
+ (bool success2, ) = _swap(!zeroForOne, amountOut, amountOut, true);
+
+ if (success1 && success2) {
+ uint256 balanceAfter0 = testToken1.balanceOf(address(user));
+ uint256 balanceAfter1 = testToken2.balanceOf(address(user));
+
+ assert(balanceAfter0 <= balanceBefore0);
+ assert(balanceAfter1 <= balanceBefore1);
+ }
+ }
+
+ function test_UniV2_swap_IncreaseUserOutBalance(
+ bool zeroForOne,
+ uint256 amount0,
+ uint256 amount1
+ ) public {
+ pair.skim(address(this));
+ UniswapV2ERC20 outToken = zeroForOne ? testToken2 : testToken1;
+ uint256 outBalanceBefore = outToken.balanceOf(address(user));
+
+ (uint reserve0Before, uint reserve1Before, ) = pair.getReserves();
+ require(reserve0Before > 0 && reserve1Before > 0);
+
+ (bool success, ) = _swap(zeroForOne, amount0, amount1, false);
+
+ if (success) {
+ uint256 outBalanceAfter = outToken.balanceOf(address(user));
+
+ (uint reserve0After, uint reserve1After, ) = pair.getReserves();
+ uint kAfter = reserve0After * reserve1After;
+ assert(outBalanceAfter > outBalanceBefore);
+ }
+ }
+
+ function test_UniV2_swap_OutPriceIncrease_InPriceDecrease(
+ bool zeroForOne,
+ uint256 amountIn
+ ) public {
+ (uint reserve0Before, uint reserve1Before, ) = pair.getReserves();
+ require(reserve0Before > 0 && reserve1Before > 0);
+
+ UniswapV2ERC20 inToken = zeroForOne ? testToken1 : testToken2;
+ UniswapV2ERC20 outToken = zeroForOne ? testToken2 : testToken1;
+
+ uint256 actualAmountIn0 = _between(
+ amountIn,
+ 1,
+ inToken.balanceOf(address(user))
+ );
+ uint256 actualAmountIn1 = _between(
+ amountIn,
+ 1,
+ outToken.balanceOf(address(user))
+ );
+ uint256 amountOut1Before = _getTokenPrice(zeroForOne, actualAmountIn0);
+ uint256 amountOut0Before = _getTokenPrice(!zeroForOne, actualAmountIn1);
+
+ (bool success, ) = _swap(zeroForOne, amountIn, amountIn, false);
+
+ uint256 amountOut1After = _getTokenPrice(zeroForOne, actualAmountIn0);
+ uint256 amountOut0After = _getTokenPrice(!zeroForOne, actualAmountIn1);
+
+ assert(amountOut1Before > amountOut1After);
+ assert(amountOut0Before < amountOut0After);
+ }
+
+ fallback() external payable {}
+}
diff --git a/contracts/AMM/UniswapV2/UniswapV2RouterPropertyTests.sol b/contracts/AMM/UniswapV2/UniswapV2RouterPropertyTests.sol
new file mode 100644
index 0000000..1f24ba2
--- /dev/null
+++ b/contracts/AMM/UniswapV2/UniswapV2RouterPropertyTests.sol
@@ -0,0 +1,396 @@
+pragma solidity ^0.6.0;
+
+import "./Setup.sol";
+import "./libraries/UniswapV2Library.sol";
+
+contract CryticUniswapV2RouterPropertyTests is Setup {
+ event AmountsIn(uint amount0, uint amount1);
+ event AmountsOut(uint amount0, uint amount1);
+ event BalancesBefore(uint balance0, uint balance1);
+ event BalancesAfter(uint balance0, uint balance1);
+ event ReservesBefore(uint reserve0, uint reserve1);
+ event ReservesAfter(uint reserve0, uint reserve1);
+ event KValues(uint256 a, uint256 b);
+ event AssertionFailed(uint256 a, uint256 b, string reason);
+
+ function _provideLiquidity(
+ uint256 amount0,
+ uint256 amount1,
+ uint256 amount0Min,
+ uint256 amount1Min
+ ) internal returns (uint256 amountA, uint256 amountB, uint256 liquidity) {
+ amount0 = _between(amount0, 1000, uint(-1));
+ amount1 = _between(amount1, 1000, uint(-1));
+ amount0Min = _between(amount0Min, 0, amount0);
+ amount1Min = _between(amount1Min, 0, amount1);
+ uint256 deadline = block.timestamp.add(1000);
+
+ if (!completed) {
+ _init(amount0, amount1);
+ }
+
+ hevm.prank(address(user));
+ (amountA, amountB, liquidity) = router.addLiquidity(
+ address(testToken1),
+ address(testToken2),
+ amount0,
+ amount1,
+ amount0Min,
+ amount1Min,
+ address(user),
+ deadline
+ );
+ }
+
+ function _burnLiquidity(
+ uint256 amount,
+ uint256 amount0Min,
+ uint256 amount1Min
+ ) internal returns (uint256 amount0, uint256 amount1) {
+ uint256 balance = pair.balanceOf(address(user));
+ (uint reserve0, uint reserve1, ) = pair.getReserves();
+
+ amount = _between(amount, 1, balance);
+ amount0Min = _between(amount0Min, 0, reserve0);
+ amount1Min = _between(amount1Min, 0, reserve1);
+ uint256 deadline = block.timestamp.add(1000);
+
+ hevm.prank(address(user));
+ (amount0, amount1) = router.removeLiquidity(
+ address(testToken1),
+ address(testToken2),
+ amount,
+ amount0Min,
+ amount1Min,
+ address(user),
+ deadline
+ );
+ }
+
+ function _swapExactTokensForTokens(
+ bool zeroForOne,
+ uint256 amountIn,
+ uint256 amountOutMin
+ ) internal returns (uint[] memory amounts) {
+ (uint reserve0, uint reserve1, ) = pair.getReserves();
+
+ address[] memory path = new address[](2);
+ path[0] = zeroForOne ? address(testToken1) : address(testToken2);
+ path[1] = zeroForOne ? address(testToken2) : address(testToken1);
+ uint256 deadline = block.timestamp.add(1000);
+ amountIn = _between(
+ amountIn,
+ 1,
+ UniswapV2ERC20(path[0]).balanceOf(address(user))
+ );
+ amountOutMin = _between(
+ amountOutMin,
+ 0,
+ zeroForOne ? reserve1 : reserve0
+ );
+
+ hevm.prank(address(user));
+ amounts = router.swapExactTokensForTokens(
+ amountIn,
+ amountOutMin,
+ path,
+ address(user),
+ deadline
+ );
+ }
+
+ function _getTokenPrice(
+ bool zeroForOne,
+ uint256 inputAmount
+ ) internal returns (uint256 amountOut) {
+ (uint reserve0, uint reserve1, ) = pair.getReserves();
+ amountOut = router.getAmountOut(
+ inputAmount,
+ zeroForOne ? reserve0 : reserve1,
+ zeroForOne ? reserve1 : reserve0
+ );
+ }
+
+ // Providing liquidity
+
+ function test_UniV2_provideLiquidity_IncreasesK(
+ uint256 amount0,
+ uint256 amount1,
+ uint256 amount0Min,
+ uint256 amount1Min
+ ) public {
+ (uint reserve0Before, uint reserve1Before, ) = pair.getReserves();
+ uint kBefore = reserve0Before.mul(reserve1Before);
+
+ _provideLiquidity(amount0, amount1, amount0Min, amount1Min);
+
+ (uint reserve0After, uint reserve1After, ) = pair.getReserves();
+ uint kAfter = reserve0After.mul(reserve1After);
+ if (kBefore >= kAfter) {
+ emit AssertionFailed(kBefore, kAfter, "kBefore is >= kAfter");
+ }
+ }
+
+ function test_UniV2_provideLiquidity_IncreasesLPSupply(
+ uint256 amount0,
+ uint256 amount1,
+ uint256 amount0Min,
+ uint256 amount1Min
+ ) public {
+ // State before
+ uint256 lpTokenSupplyBefore = pair.totalSupply();
+
+ _provideLiquidity(amount0, amount1, amount0Min, amount1Min);
+
+ // Postconditions:
+ uint256 lpTokenSupplyAfter = pair.totalSupply();
+ assert(lpTokenSupplyBefore < lpTokenSupplyAfter);
+ }
+
+ function test_UniV2_provideLiquidity_tokenPriceUnchanged(
+ uint256 amount0,
+ uint256 amount1,
+ uint256 amount0Min,
+ uint256 amount1Min,
+ bool zeroForOne,
+ uint256 amountIn
+ ) public {
+ UniswapV2ERC20 inToken = zeroForOne ? testToken1 : testToken2;
+ uint256 actualAmountIn = _between(
+ amountIn,
+ 1,
+ inToken.balanceOf(address(user))
+ );
+ uint256 amountOutBefore = _getTokenPrice(zeroForOne, actualAmountIn);
+
+ _provideLiquidity(amount0, amount1, amount0Min, amount1Min);
+
+ uint256 amountOutAfter = _getTokenPrice(zeroForOne, actualAmountIn);
+
+ emit AmountsIn(amountOutBefore, amountOutAfter);
+ assert(amountOutBefore == amountOutAfter);
+ }
+
+ function test_UniV2_provideLiquidity_IncreaseReserves(
+ uint256 amount0,
+ uint256 amount1,
+ uint256 amount0Min,
+ uint256 amount1Min
+ ) public {
+ (uint reserve0Before, uint reserve1Before, ) = pair.getReserves();
+
+ _provideLiquidity(amount0, amount1, amount0Min, amount1Min);
+
+ // Postconditions:
+ (uint reserve0After, uint reserve1After, ) = pair.getReserves();
+
+ assert(reserve0Before < reserve0After);
+ assert(reserve1Before < reserve1After);
+ }
+
+ function test_UniV2_provideLiquidity_IncreaseUserLPBalance(
+ uint256 amount0,
+ uint256 amount1,
+ uint256 amount0Min,
+ uint256 amount1Min
+ ) public {
+ uint lpTokenBalanceBefore = pair.balanceOf(address(user));
+
+ _provideLiquidity(amount0, amount1, amount0Min, amount1Min);
+
+ uint lpTokenBalanceAfter = pair.balanceOf(address(user));
+ assert(lpTokenBalanceBefore < lpTokenBalanceAfter);
+ }
+
+ // Removing liquidity
+
+ function test_UniV2_removeLiquidity_DecreaseK(
+ uint256 amount,
+ uint256 amount0Min,
+ uint256 amount1Min
+ ) public {
+ uint lpTokenBalanceBefore = pair.balanceOf(address(user));
+ require(lpTokenBalanceBefore > 0);
+
+ (uint reserve0Before, uint reserve1Before, ) = pair.getReserves();
+ uint kBefore = reserve0Before.mul(reserve1Before);
+
+ _burnLiquidity(amount, amount0Min, amount1Min);
+
+ (uint reserve0After, uint reserve1After, ) = pair.getReserves();
+ uint kAfter = reserve0After.mul(reserve1After);
+ if (kBefore <= kAfter) {
+ emit AssertionFailed(kBefore, kAfter, "kBefore is <= kAfter");
+ }
+ }
+
+ function test_UniV2_removeLiquidity_DecreaseLPSupply(
+ uint256 amount,
+ uint256 amount0Min,
+ uint256 amount1Min
+ ) public {
+ uint lpTokenBalanceBefore = pair.balanceOf(address(user));
+ require(lpTokenBalanceBefore > 0);
+
+ // State before
+ uint256 lpTokenSupplyBefore = pair.totalSupply();
+
+ _burnLiquidity(amount, amount0Min, amount1Min);
+
+ // Postconditions:
+ uint256 lpTokenSupplyAfter = pair.totalSupply();
+ assert(lpTokenSupplyBefore > lpTokenSupplyAfter);
+ }
+
+ function test_UniV2_removeLiquidity_tokenPriceUnchanged(
+ uint256 amount,
+ uint256 amount0Min,
+ uint256 amount1Min,
+ bool zeroForOne,
+ uint256 amountIn
+ ) public {
+ uint lpTokenBalanceBefore = pair.balanceOf(address(user));
+ require(lpTokenBalanceBefore > 0);
+
+ UniswapV2ERC20 inToken = zeroForOne ? testToken1 : testToken2;
+ uint256 actualAmountIn = _between(
+ amountIn,
+ 1,
+ inToken.balanceOf(address(user))
+ );
+ uint256 amountOutBefore = _getTokenPrice(zeroForOne, actualAmountIn);
+
+ _burnLiquidity(amount, amount0Min, amount1Min);
+
+ uint256 amountOutAfter = _getTokenPrice(zeroForOne, actualAmountIn);
+
+ emit AmountsIn(amountOutBefore, amountOutAfter);
+ assert(amountOutBefore == amountOutAfter);
+ }
+
+ function test_UniV2_removeLiquidity_DecreaseReserves(
+ uint256 amount,
+ uint256 amount0Min,
+ uint256 amount1Min
+ ) public {
+ uint lpTokenBalanceBefore = pair.balanceOf(address(user));
+ require(lpTokenBalanceBefore > 0);
+
+ (uint reserve0Before, uint reserve1Before, ) = pair.getReserves();
+
+ _burnLiquidity(amount, amount0Min, amount1Min);
+
+ // Postconditions:
+ (uint reserve0After, uint reserve1After, ) = pair.getReserves();
+
+ assert(reserve0Before > reserve0After);
+ assert(reserve1Before > reserve1After);
+ }
+
+ function test_UniV2_removeLiquidity_DecreaseUserLPBalance(
+ uint256 amount,
+ uint256 amount0Min,
+ uint256 amount1Min
+ ) public {
+ uint lpTokenBalanceBefore = pair.balanceOf(address(user));
+ require(lpTokenBalanceBefore > 0);
+
+ _burnLiquidity(amount, amount0Min, amount1Min);
+
+ uint lpTokenBalanceAfter = pair.balanceOf(address(user));
+ assert(lpTokenBalanceBefore > lpTokenBalanceAfter);
+ }
+
+ // Swapping
+ function test_UniV2_swapExactTokensForTokens_DoesNotDecreaseK(
+ bool zeroForOne,
+ uint256 amountIn,
+ uint256 amountOutMin
+ ) public {
+ (uint reserve0Before, uint reserve1Before, ) = pair.getReserves();
+ require(reserve0Before > 0 && reserve1Before > 0);
+ uint kBefore = reserve0Before.mul(reserve1Before);
+
+ _swapExactTokensForTokens(zeroForOne, amountIn, amountOutMin);
+
+ (uint reserve0After, uint reserve1After, ) = pair.getReserves();
+ uint kAfter = reserve0After.mul(reserve1After);
+ if (kBefore > kAfter) {
+ emit AssertionFailed(kBefore, kAfter, "kBefore is > kAfter");
+ }
+ }
+
+ function test_UniV2_swapExactTokensForTokens_TwoWaySwapDoesNotResultInProfit(
+ bool zeroForOne,
+ uint256 amountIn,
+ uint256 amountOutMin
+ ) public {
+ (uint reserve0Before, uint reserve1Before, ) = pair.getReserves();
+ require(reserve0Before > 0 && reserve1Before > 0);
+
+ uint256 balanceBefore0 = testToken1.balanceOf(address(user));
+ uint256 balanceBefore1 = testToken2.balanceOf(address(user));
+ uint256[] memory amounts = new uint256[](2);
+
+ amounts = _swapExactTokensForTokens(zeroForOne, amountIn, amountOutMin);
+ _swapExactTokensForTokens(!zeroForOne, amounts[1], 0);
+
+ uint256 balanceAfter0 = testToken1.balanceOf(address(user));
+ uint256 balanceAfter1 = testToken2.balanceOf(address(user));
+
+ assert(balanceAfter0 <= balanceBefore0);
+ assert(balanceAfter1 <= balanceBefore1);
+ }
+
+ function test_UniV2_swapExactTokensForTokens_IncreaseUserOutBalance(
+ bool zeroForOne,
+ uint256 amountIn,
+ uint256 amountOutMin
+ ) public {
+ (uint reserve0Before, uint reserve1Before, ) = pair.getReserves();
+ require(reserve0Before > 0 && reserve1Before > 0);
+
+ UniswapV2ERC20 outToken = zeroForOne ? testToken2 : testToken1;
+ uint256 balanceBefore = outToken.balanceOf(address(user));
+
+ _swapExactTokensForTokens(zeroForOne, amountIn, amountOutMin);
+
+ uint256 balanceAfter = outToken.balanceOf(address(user));
+ assert(balanceAfter > balanceBefore);
+ }
+
+ function test_UniV2_swapExactTokensForTokens_OutPriceIncrease_InPriceDecrease(
+ bool zeroForOne,
+ uint256 amountIn,
+ uint256 amountOutMin
+ ) public {
+ (uint reserve0Before, uint reserve1Before, ) = pair.getReserves();
+ require(reserve0Before > 0 && reserve1Before > 0);
+
+ UniswapV2ERC20 inToken = zeroForOne ? testToken1 : testToken2;
+ UniswapV2ERC20 outToken = zeroForOne ? testToken2 : testToken1;
+
+ uint256 actualAmountIn0 = _between(
+ amountIn,
+ 1,
+ inToken.balanceOf(address(user))
+ );
+ uint256 actualAmountIn1 = _between(
+ amountIn,
+ 1,
+ outToken.balanceOf(address(user))
+ );
+ uint256 amountOut1Before = _getTokenPrice(zeroForOne, actualAmountIn0);
+ uint256 amountOut0Before = _getTokenPrice(!zeroForOne, actualAmountIn1);
+
+ _swapExactTokensForTokens(zeroForOne, amountIn, amountOutMin);
+
+ uint256 amountOut1After = _getTokenPrice(zeroForOne, actualAmountIn0);
+ uint256 amountOut0After = _getTokenPrice(!zeroForOne, actualAmountIn1);
+
+ assert(amountOut1Before > amountOut1After);
+ assert(amountOut0Before < amountOut0After);
+ }
+
+ fallback() external payable {}
+}
diff --git a/contracts/AMM/UniswapV2/echidna-config.yaml b/contracts/AMM/UniswapV2/echidna-config.yaml
new file mode 100644
index 0000000..929adc7
--- /dev/null
+++ b/contracts/AMM/UniswapV2/echidna-config.yaml
@@ -0,0 +1,4 @@
+testMode: assertion
+corpusDir: corpus
+seqLen: 25
+testLimit: 100000
diff --git a/contracts/AMM/UniswapV2/interfaces/IERC20.sol b/contracts/AMM/UniswapV2/interfaces/IERC20.sol
new file mode 100644
index 0000000..327174f
--- /dev/null
+++ b/contracts/AMM/UniswapV2/interfaces/IERC20.sol
@@ -0,0 +1,31 @@
+pragma solidity >=0.5.0;
+
+interface IERC20 {
+ event Approval(address indexed owner, address indexed spender, uint value);
+ event Transfer(address indexed from, address indexed to, uint value);
+
+ function name() external view returns (string memory);
+
+ function symbol() external view returns (string memory);
+
+ function decimals() external view returns (uint8);
+
+ function totalSupply() external view returns (uint);
+
+ function balanceOf(address owner) external view returns (uint);
+
+ function allowance(
+ address owner,
+ address spender
+ ) external view returns (uint);
+
+ function approve(address spender, uint value) external returns (bool);
+
+ function transfer(address to, uint value) external returns (bool);
+
+ function transferFrom(
+ address from,
+ address to,
+ uint value
+ ) external returns (bool);
+}
diff --git a/contracts/AMM/UniswapV2/interfaces/IUniswapV2Callee.sol b/contracts/AMM/UniswapV2/interfaces/IUniswapV2Callee.sol
new file mode 100644
index 0000000..2771749
--- /dev/null
+++ b/contracts/AMM/UniswapV2/interfaces/IUniswapV2Callee.sol
@@ -0,0 +1,10 @@
+pragma solidity >=0.5.0;
+
+interface IUniswapV2Callee {
+ function uniswapV2Call(
+ address sender,
+ uint amount0,
+ uint amount1,
+ bytes calldata data
+ ) external;
+}
diff --git a/contracts/AMM/UniswapV2/interfaces/IUniswapV2ERC20.sol b/contracts/AMM/UniswapV2/interfaces/IUniswapV2ERC20.sol
new file mode 100644
index 0000000..85527e2
--- /dev/null
+++ b/contracts/AMM/UniswapV2/interfaces/IUniswapV2ERC20.sol
@@ -0,0 +1,47 @@
+pragma solidity >=0.5.0;
+
+interface IUniswapV2ERC20 {
+ event Approval(address indexed owner, address indexed spender, uint value);
+ event Transfer(address indexed from, address indexed to, uint value);
+
+ function name() external pure returns (string memory);
+
+ function symbol() external pure returns (string memory);
+
+ function decimals() external pure returns (uint8);
+
+ function totalSupply() external view returns (uint);
+
+ function balanceOf(address owner) external view returns (uint);
+
+ function allowance(
+ address owner,
+ address spender
+ ) external view returns (uint);
+
+ function approve(address spender, uint value) external returns (bool);
+
+ function transfer(address to, uint value) external returns (bool);
+
+ function transferFrom(
+ address from,
+ address to,
+ uint value
+ ) external returns (bool);
+
+ function DOMAIN_SEPARATOR() external view returns (bytes32);
+
+ function PERMIT_TYPEHASH() external pure returns (bytes32);
+
+ function nonces(address owner) external view returns (uint);
+
+ function permit(
+ address owner,
+ address spender,
+ uint value,
+ uint deadline,
+ uint8 v,
+ bytes32 r,
+ bytes32 s
+ ) external;
+}
diff --git a/contracts/AMM/UniswapV2/interfaces/IUniswapV2Factory.sol b/contracts/AMM/UniswapV2/interfaces/IUniswapV2Factory.sol
new file mode 100644
index 0000000..2e39be4
--- /dev/null
+++ b/contracts/AMM/UniswapV2/interfaces/IUniswapV2Factory.sol
@@ -0,0 +1,32 @@
+pragma solidity >=0.5.0;
+
+interface IUniswapV2Factory {
+ event PairCreated(
+ address indexed token0,
+ address indexed token1,
+ address pair,
+ uint
+ );
+
+ function feeTo() external view returns (address);
+
+ function feeToSetter() external view returns (address);
+
+ function getPair(
+ address tokenA,
+ address tokenB
+ ) external view returns (address pair);
+
+ function allPairs(uint) external view returns (address pair);
+
+ function allPairsLength() external view returns (uint);
+
+ function createPair(
+ address tokenA,
+ address tokenB
+ ) external returns (address pair);
+
+ function setFeeTo(address) external;
+
+ function setFeeToSetter(address) external;
+}
diff --git a/contracts/AMM/UniswapV2/interfaces/IUniswapV2Pair.sol b/contracts/AMM/UniswapV2/interfaces/IUniswapV2Pair.sol
new file mode 100644
index 0000000..90312ca
--- /dev/null
+++ b/contracts/AMM/UniswapV2/interfaces/IUniswapV2Pair.sol
@@ -0,0 +1,100 @@
+pragma solidity >=0.5.0;
+
+interface IUniswapV2Pair {
+ event Approval(address indexed owner, address indexed spender, uint value);
+ event Transfer(address indexed from, address indexed to, uint value);
+
+ function name() external pure returns (string memory);
+
+ function symbol() external pure returns (string memory);
+
+ function decimals() external pure returns (uint8);
+
+ function totalSupply() external view returns (uint);
+
+ function balanceOf(address owner) external view returns (uint);
+
+ function allowance(
+ address owner,
+ address spender
+ ) external view returns (uint);
+
+ function approve(address spender, uint value) external returns (bool);
+
+ function transfer(address to, uint value) external returns (bool);
+
+ function transferFrom(
+ address from,
+ address to,
+ uint value
+ ) external returns (bool);
+
+ function DOMAIN_SEPARATOR() external view returns (bytes32);
+
+ function PERMIT_TYPEHASH() external pure returns (bytes32);
+
+ function nonces(address owner) external view returns (uint);
+
+ function permit(
+ address owner,
+ address spender,
+ uint value,
+ uint deadline,
+ uint8 v,
+ bytes32 r,
+ bytes32 s
+ ) external;
+
+ event Mint(address indexed sender, uint amount0, uint amount1);
+ event Burn(
+ address indexed sender,
+ uint amount0,
+ uint amount1,
+ address indexed to
+ );
+ event Swap(
+ address indexed sender,
+ uint amount0In,
+ uint amount1In,
+ uint amount0Out,
+ uint amount1Out,
+ address indexed to
+ );
+ event Sync(uint112 reserve0, uint112 reserve1);
+
+ function MINIMUM_LIQUIDITY() external pure returns (uint);
+
+ function factory() external view returns (address);
+
+ function token0() external view returns (address);
+
+ function token1() external view returns (address);
+
+ function getReserves()
+ external
+ view
+ returns (uint112 reserve0, uint112 reserve1, uint32 blockTimestampLast);
+
+ function price0CumulativeLast() external view returns (uint);
+
+ function price1CumulativeLast() external view returns (uint);
+
+ function kLast() external view returns (uint);
+
+ function mint(address to) external returns (uint liquidity);
+
+ function burn(address to) external returns (uint amount0, uint amount1);
+
+ function swap(
+ uint amount0Out,
+ uint amount1Out,
+ address to,
+ bytes calldata data
+ ) external;
+
+ function skim(address to) external;
+
+ function sync() external;
+
+ function initialize(address, address) external;
+}
diff --git a/contracts/AMM/UniswapV2/interfaces/IUniswapV2Router01.sol b/contracts/AMM/UniswapV2/interfaces/IUniswapV2Router01.sol
new file mode 100644
index 0000000..fafd184
--- /dev/null
+++ b/contracts/AMM/UniswapV2/interfaces/IUniswapV2Router01.sol
@@ -0,0 +1,150 @@
+pragma solidity >=0.6.2;
+
+interface IUniswapV2Router01 {
+ function factory() external pure returns (address);
+
+ function WETH() external pure returns (address);
+
+ function addLiquidity(
+ address tokenA,
+ address tokenB,
+ uint amountADesired,
+ uint amountBDesired,
+ uint amountAMin,
+ uint amountBMin,
+ address to,
+ uint deadline
+ ) external returns (uint amountA, uint amountB, uint liquidity);
+
+ function addLiquidityETH(
+ address token,
+ uint amountTokenDesired,
+ uint amountTokenMin,
+ uint amountETHMin,
+ address to,
+ uint deadline
+ )
+ external
+ payable
+ returns (uint amountToken, uint amountETH, uint liquidity);
+
+ function removeLiquidity(
+ address tokenA,
+ address tokenB,
+ uint liquidity,
+ uint amountAMin,
+ uint amountBMin,
+ address to,
+ uint deadline
+ ) external returns (uint amountA, uint amountB);
+
+ function removeLiquidityETH(
+ address token,
+ uint liquidity,
+ uint amountTokenMin,
+ uint amountETHMin,
+ address to,
+ uint deadline
+ ) external returns (uint amountToken, uint amountETH);
+
+ function removeLiquidityWithPermit(
+ address tokenA,
+ address tokenB,
+ uint liquidity,
+ uint amountAMin,
+ uint amountBMin,
+ address to,
+ uint deadline,
+ bool approveMax,
+ uint8 v,
+ bytes32 r,
+ bytes32 s
+ ) external returns (uint amountA, uint amountB);
+
+ function removeLiquidityETHWithPermit(
+ address token,
+ uint liquidity,
+ uint amountTokenMin,
+ uint amountETHMin,
+ address to,
+ uint deadline,
+ bool approveMax,
+ uint8 v,
+ bytes32 r,
+ bytes32 s
+ ) external returns (uint amountToken, uint amountETH);
+
+ function swapExactTokensForTokens(
+ uint amountIn,
+ uint amountOutMin,
+ address[] calldata path,
+ address to,
+ uint deadline
+ ) external returns (uint[] memory amounts);
+
+ function swapTokensForExactTokens(
+ uint amountOut,
+ uint amountInMax,
+ address[] calldata path,
+ address to,
+ uint deadline
+ ) external returns (uint[] memory amounts);
+
+ function swapExactETHForTokens(
+ uint amountOutMin,
+ address[] calldata path,
+ address to,
+ uint deadline
+ ) external payable returns (uint[] memory amounts);
+
+ function swapTokensForExactETH(
+ uint amountOut,
+ uint amountInMax,
+ address[] calldata path,
+ address to,
+ uint deadline
+ ) external returns (uint[] memory amounts);
+
+ function swapExactTokensForETH(
+ uint amountIn,
+ uint amountOutMin,
+ address[] calldata path,
+ address to,
+ uint deadline
+ ) external returns (uint[] memory amounts);
+
+ function swapETHForExactTokens(
+ uint amountOut,
+ address[] calldata path,
+ address to,
+ uint deadline
+ ) external payable returns (uint[] memory amounts);
+
+ function quote(
+ uint amountA,
+ uint reserveA,
+ uint reserveB
+ ) external pure returns (uint amountB);
+
+ function getAmountOut(
+ uint amountIn,
+ uint reserveIn,
+ uint reserveOut
+ ) external pure returns (uint amountOut);
+
+ function getAmountIn(
+ uint amountOut,
+ uint reserveIn,
+ uint reserveOut
+ ) external pure returns (uint amountIn);
+
+ function getAmountsOut(
+ uint amountIn,
+ address[] calldata path
+ ) external view returns (uint[] memory amounts);
+
+ function getAmountsIn(
+ uint amountOut,
+ address[] calldata path
+ ) external view returns (uint[] memory amounts);
+}
diff --git a/contracts/AMM/UniswapV2/interfaces/IUniswapV2Router02.sol b/contracts/AMM/UniswapV2/interfaces/IUniswapV2Router02.sol
new file mode 100644
index 0000000..5d16780
--- /dev/null
+++ b/contracts/AMM/UniswapV2/interfaces/IUniswapV2Router02.sol
@@ -0,0 +1,50 @@
+pragma solidity >=0.6.2;
+
+import "./IUniswapV2Router01.sol";
+
+interface IUniswapV2Router02 is IUniswapV2Router01 {
+ function removeLiquidityETHSupportingFeeOnTransferTokens(
+ address token,
+ uint liquidity,
+ uint amountTokenMin,
+ uint amountETHMin,
+ address to,
+ uint deadline
+ ) external returns (uint amountETH);
+
+ function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
+ address token,
+ uint liquidity,
+ uint amountTokenMin,
+ uint amountETHMin,
+ address to,
+ uint deadline,
+ bool approveMax,
+ uint8 v,
+ bytes32 r,
+ bytes32 s
+ ) external returns (uint amountETH);
+
+ function swapExactTokensForTokensSupportingFeeOnTransferTokens(
+ uint amountIn,
+ uint amountOutMin,
+ address[] calldata path,
+ address to,
+ uint deadline
+ ) external;
+
+ function swapExactETHForTokensSupportingFeeOnTransferTokens(
+ uint amountOutMin,
+ address[] calldata path,
+ address to,
+ uint deadline
+ ) external payable;
+
+ function swapExactTokensForETHSupportingFeeOnTransferTokens(
+ uint amountIn,
+ uint amountOutMin,
+ address[] calldata path,
+ address to,
+ uint deadline
+ ) external;
+}
diff --git a/contracts/AMM/UniswapV2/interfaces/IWETH.sol b/contracts/AMM/UniswapV2/interfaces/IWETH.sol
new file mode 100644
index 0000000..a971609
--- /dev/null
+++ b/contracts/AMM/UniswapV2/interfaces/IWETH.sol
@@ -0,0 +1,9 @@
+pragma solidity >=0.5.0;
+
+interface IWETH {
+ function deposit() external payable;
+
+ function transfer(address to, uint value) external returns (bool);
+
+ function withdraw(uint) external;
+}
diff --git a/contracts/AMM/UniswapV2/interfaces/test.sol b/contracts/AMM/UniswapV2/interfaces/test.sol
new file mode 100644
index 0000000..e69de29
diff --git a/contracts/AMM/UniswapV2/libraries/Math.sol b/contracts/AMM/UniswapV2/libraries/Math.sol
new file mode 100644
index 0000000..1158cb2
--- /dev/null
+++ b/contracts/AMM/UniswapV2/libraries/Math.sol
@@ -0,0 +1,23 @@
+pragma solidity ^0.6.0;
+
+// a library for performing various math operations
+
+library Math {
+ function min(uint x, uint y) internal pure returns (uint z) {
+ z = x < y ? x : y;
+ }
+
+ // babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method)
+ function sqrt(uint y) internal pure returns (uint z) {
+ if (y > 3) {
+ z = y;
+ uint x = y / 2 + 1;
+ while (x < z) {
+ z = x;
+ x = (y / x + x) / 2;
+ }
+ } else if (y != 0) {
+ z = 1;
+ }
+ }
+}
diff --git a/contracts/AMM/UniswapV2/libraries/SafeMath.sol b/contracts/AMM/UniswapV2/libraries/SafeMath.sol
new file mode 100644
index 0000000..fa2f8ab
--- /dev/null
+++ b/contracts/AMM/UniswapV2/libraries/SafeMath.sol
@@ -0,0 +1,17 @@
+pragma solidity >=0.5.16;
+
+// a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math)
+
+library SafeMath {
+ function add(uint x, uint y) internal pure returns (uint z) {
+ require((z = x + y) >= x, "ds-math-add-overflow");
+ }
+
+ function sub(uint x, uint y) internal pure returns (uint z) {
+ require((z = x - y) <= x, "ds-math-sub-underflow");
+ }
+
+ function mul(uint x, uint y) internal pure returns (uint z) {
+ require(y == 0 || (z = x * y) / y == x, "ds-math-mul-overflow");
+ }
+}
diff --git a/contracts/AMM/UniswapV2/libraries/TransferHelper.sol b/contracts/AMM/UniswapV2/libraries/TransferHelper.sol
new file mode 100644
index 0000000..a8c9822
--- /dev/null
+++ b/contracts/AMM/UniswapV2/libraries/TransferHelper.sol
@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+pragma solidity >=0.6.0;
+
+// helper methods for interacting with ERC20 tokens and sending ETH that do not consistently return true/false
+library TransferHelper {
+ function safeApprove(address token, address to, uint256 value) internal {
+ // bytes4(keccak256(bytes('approve(address,uint256)')));
+ (bool success, bytes memory data) = token.call(
+ abi.encodeWithSelector(0x095ea7b3, to, value)
+ );
+ require(
+ success && (data.length == 0 || abi.decode(data, (bool))),
+ "TransferHelper::safeApprove: approve failed"
+ );
+ }
+
+ function safeTransfer(address token, address to, uint256 value) internal {
+ // bytes4(keccak256(bytes('transfer(address,uint256)')));
+ (bool success, bytes memory data) = token.call(
+ abi.encodeWithSelector(0xa9059cbb, to, value)
+ );
+ require(
+ success && (data.length == 0 || abi.decode(data, (bool))),
+ "TransferHelper::safeTransfer: transfer failed"
+ );
+ }
+
+ function safeTransferFrom(
+ address token,
+ address from,
+ address to,
+ uint256 value
+ ) internal {
+ // bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));
+ (bool success, bytes memory data) = token.call(
+ abi.encodeWithSelector(0x23b872dd, from, to, value)
+ );
+ require(
+ success && (data.length == 0 || abi.decode(data, (bool))),
+ "TransferHelper::transferFrom: transferFrom failed"
+ );
+ }
+
+ function safeTransferETH(address to, uint256 value) internal {
+ (bool success, ) = to.call{value: value}(new bytes(0));
+ require(
+ success,
+ "TransferHelper::safeTransferETH: ETH transfer failed"
+ );
+ }
+}
diff --git a/contracts/AMM/UniswapV2/libraries/UQ112x112.sol b/contracts/AMM/UniswapV2/libraries/UQ112x112.sol
new file mode 100644
index 0000000..aeedd8e
--- /dev/null
+++ b/contracts/AMM/UniswapV2/libraries/UQ112x112.sol
@@ -0,0 +1,20 @@
+pragma solidity ^0.6.0;
+
+// a library for handling binary fixed point numbers (https://en.wikipedia.org/wiki/Q_(number_format))
+
+// range: [0, 2**112 - 1]
+// resolution: 1 / 2**112
+
+library UQ112x112 {
+ uint224 constant Q112 = 2 ** 112;
+
+ // encode a uint112 as a UQ112x112
+ function encode(uint112 y) internal pure returns (uint224 z) {
+ z = uint224(y) * Q112; // never overflows
+ }
+
+ // divide a UQ112x112 by a uint112, returning a UQ112x112
+ function uqdiv(uint224 x, uint112 y) internal pure returns (uint224 z) {
+ z = x / uint224(y);
+ }
+}
diff --git a/contracts/AMM/UniswapV2/libraries/UniswapV2Library.sol b/contracts/AMM/UniswapV2/libraries/UniswapV2Library.sol
new file mode 100644
index 0000000..1204f7c
--- /dev/null
+++ b/contracts/AMM/UniswapV2/libraries/UniswapV2Library.sol
@@ -0,0 +1,145 @@
+pragma solidity >=0.5.0;
+
+import "../interfaces/IUniswapV2Pair.sol";
+
+import "./SafeMath.sol";
+
+library UniswapV2Library {
+ using SafeMath for uint;
+
+ // returns sorted token addresses, used to handle return values from pairs sorted in this order
+ function sortTokens(
+ address tokenA,
+ address tokenB
+ ) internal pure returns (address token0, address token1) {
+ require(tokenA != tokenB, "UniswapV2Library: IDENTICAL_ADDRESSES");
+ (token0, token1) = tokenA < tokenB
+ ? (tokenA, tokenB)
+ : (tokenB, tokenA);
+ require(token0 != address(0), "UniswapV2Library: ZERO_ADDRESS");
+ }
+
+ // calculates the CREATE2 address for a pair without making any external calls
+ function pairFor(
+ address factory,
+ address tokenA,
+ address tokenB
+ ) internal pure returns (address pair) {
+ (address token0, address token1) = sortTokens(tokenA, tokenB);
+ pair = address(
+ uint160(
+ uint(
+ keccak256(
+ abi.encodePacked(
+ hex"ff",
+ factory,
+ keccak256(abi.encodePacked(token0, token1)),
+ hex"40ccc7d6659c66489c67f86ee7da56ef3d635186e37713baa8676c9dee5f9325"
+ //hex'96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f' // init code hash
+ )
+ )
+ )
+ )
+ );
+ }
+
+ // fetches and sorts the reserves for a pair
+ function getReserves(
+ address factory,
+ address tokenA,
+ address tokenB
+ ) internal view returns (uint reserveA, uint reserveB) {
+ (address token0, ) = sortTokens(tokenA, tokenB);
+ (uint reserve0, uint reserve1, ) = IUniswapV2Pair(
+ pairFor(factory, tokenA, tokenB)
+ ).getReserves();
+ (reserveA, reserveB) = tokenA == token0
+ ? (reserve0, reserve1)
+ : (reserve1, reserve0);
+ }
+
+ // given some amount of an asset and pair reserves, returns an equivalent amount of the other asset
+ function quote(
+ uint amountA,
+ uint reserveA,
+ uint reserveB
+ ) internal pure returns (uint amountB) {
+ require(amountA > 0, "UniswapV2Library: INSUFFICIENT_AMOUNT");
+ require(
+ reserveA > 0 && reserveB > 0,
+ "UniswapV2Library: INSUFFICIENT_LIQUIDITY"
+ );
+ amountB = amountA.mul(reserveB) / reserveA;
+ }
+
+ // given an input amount of an asset and pair reserves, returns the maximum output amount of the other asset
+ function getAmountOut(
+ uint amountIn,
+ uint reserveIn,
+ uint reserveOut
+ ) internal pure returns (uint amountOut) {
+ require(amountIn > 0, "UniswapV2Library: INSUFFICIENT_INPUT_AMOUNT");
+ require(
+ reserveIn > 0 && reserveOut > 0,
+ "UniswapV2Library: INSUFFICIENT_LIQUIDITY"
+ );
+ uint amountInWithFee = amountIn.mul(997);
+ uint numerator = amountInWithFee.mul(reserveOut);
+ uint denominator = reserveIn.mul(1000).add(amountInWithFee);
+ amountOut = numerator / denominator;
+ }
+
+ // given an output amount of an asset and pair reserves, returns a required input amount of the other asset
+ function getAmountIn(
+ uint amountOut,
+ uint reserveIn,
+ uint reserveOut
+ ) internal pure returns (uint amountIn) {
+ require(amountOut > 0, "UniswapV2Library: INSUFFICIENT_OUTPUT_AMOUNT");
+ require(
+ reserveIn > 0 && reserveOut > 0,
+ "UniswapV2Library: INSUFFICIENT_LIQUIDITY"
+ );
+ uint numerator = reserveIn.mul(amountOut).mul(1000);
+ uint denominator = reserveOut.sub(amountOut).mul(997);
+ amountIn = (numerator / denominator).add(1);
+ }
+
+ // performs chained getAmountOut calculations on any number of pairs
+ function getAmountsOut(
+ address factory,
+ uint amountIn,
+ address[] memory path
+ ) internal view returns (uint[] memory amounts) {
+ require(path.length >= 2, "UniswapV2Library: INVALID_PATH");
+ amounts = new uint[](path.length);
+ amounts[0] = amountIn;
+ for (uint i; i < path.length - 1; i++) {
+ (uint reserveIn, uint reserveOut) = getReserves(
+ factory,
+ path[i],
+ path[i + 1]
+ );
+ amounts[i + 1] = getAmountOut(amounts[i], reserveIn, reserveOut);
+ }
+ }
+
+ // performs chained getAmountIn calculations on any number of pairs
+ function getAmountsIn(
+ address factory,
+ uint amountOut,
+ address[] memory path
+ ) internal view returns (uint[] memory amounts) {
+ require(path.length >= 2, "UniswapV2Library: INVALID_PATH");
+ amounts = new uint[](path.length);
+ amounts[amounts.length - 1] = amountOut;
+ for (uint i = path.length - 1; i > 0; i--) {
+ (uint reserveIn, uint reserveOut) = getReserves(
+ factory,
+ path[i - 1],
+ path[i]
+ );
+ amounts[i - 1] = getAmountIn(amounts[i], reserveIn, reserveOut);
+ }
+ }
+}
diff --git a/contracts/AMM/UniswapV2/libraries/WETH.sol b/contracts/AMM/UniswapV2/libraries/WETH.sol
new file mode 100644
index 0000000..c03e123
--- /dev/null
+++ b/contracts/AMM/UniswapV2/libraries/WETH.sol
@@ -0,0 +1,762 @@
+/**
+ *Submitted for verification at Etherscan.io on 2017-12-12
+ */
+
+// Copyright (C) 2015, 2016, 2017 Dapphub
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see .
+
+pragma solidity ^0.6.6;
+
+contract WETH9 {
+ string public name = "Wrapped Ether";
+ string public symbol = "WETH";
+ uint8 public decimals = 18;
+
+ event Approval(address indexed src, address indexed guy, uint wad);
+ event Transfer(address indexed src, address indexed dst, uint wad);
+ event Deposit(address indexed dst, uint wad);
+ event Withdrawal(address indexed src, uint wad);
+
+ mapping(address => uint) public balanceOf;
+ mapping(address => mapping(address => uint)) public allowance;
+
+ fallback() external payable {
+ deposit();
+ }
+
+ function deposit() public payable {
+ balanceOf[msg.sender] += msg.value;
+ emit Deposit(msg.sender, msg.value);
+ }
+
+ function withdraw(uint wad) public {
+ require(balanceOf[msg.sender] >= wad);
+ balanceOf[msg.sender] -= wad;
+ msg.sender.transfer(wad);
+ emit Withdrawal(msg.sender, wad);
+ }
+
+ function totalSupply() public view returns (uint) {
+ return address(this).balance;
+ }
+
+ function approve(address guy, uint wad) public returns (bool) {
+ allowance[msg.sender][guy] = wad;
+ emit Approval(msg.sender, guy, wad);
+ return true;
+ }
+
+ function transfer(address dst, uint wad) public returns (bool) {
+ return transferFrom(msg.sender, dst, wad);
+ }
+
+ function transferFrom(
+ address src,
+ address dst,
+ uint wad
+ ) public returns (bool) {
+ require(balanceOf[src] >= wad);
+
+ if (src != msg.sender && allowance[src][msg.sender] != uint(-1)) {
+ require(allowance[src][msg.sender] >= wad);
+ allowance[src][msg.sender] -= wad;
+ }
+
+ balanceOf[src] -= wad;
+ balanceOf[dst] += wad;
+
+ emit Transfer(src, dst, wad);
+
+ return true;
+ }
+}
+
+/*
+ GNU GENERAL PUBLIC LICENSE
+ Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc.
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
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+*/
diff --git a/contracts/AMM/UniswapV2/uni-v2/UniswapV2ERC20.sol b/contracts/AMM/UniswapV2/uni-v2/UniswapV2ERC20.sol
new file mode 100644
index 0000000..5ef8eaa
--- /dev/null
+++ b/contracts/AMM/UniswapV2/uni-v2/UniswapV2ERC20.sol
@@ -0,0 +1,127 @@
+pragma solidity ^0.6.0;
+
+import "../interfaces/IUniswapV2ERC20.sol";
+import "../libraries/SafeMath.sol";
+
+contract UniswapV2ERC20 {
+ using SafeMath for uint;
+
+ string public constant name = "Uniswap V2";
+ string public constant symbol = "UNI-V2";
+ uint8 public constant decimals = 18;
+ uint public totalSupply;
+ mapping(address => uint) public balanceOf;
+ mapping(address => mapping(address => uint)) public allowance;
+
+ bytes32 public DOMAIN_SEPARATOR;
+ // keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
+ bytes32 public constant PERMIT_TYPEHASH =
+ 0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;
+ mapping(address => uint) public nonces;
+
+ event Approval(address indexed owner, address indexed spender, uint value);
+ event Transfer(address indexed from, address indexed to, uint value);
+
+ constructor() public {
+ uint chainId;
+ assembly {
+ chainId := chainid()
+ }
+ DOMAIN_SEPARATOR = keccak256(
+ abi.encode(
+ keccak256(
+ "EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"
+ ),
+ keccak256(bytes(name)),
+ keccak256(bytes("1")),
+ chainId,
+ address(this)
+ )
+ );
+ }
+
+ function _mint(address to, uint value) internal {
+ totalSupply = totalSupply.add(value);
+ balanceOf[to] = balanceOf[to].add(value);
+ emit Transfer(address(0), to, value);
+ }
+
+ function _burn(address from, uint value) internal {
+ balanceOf[from] = balanceOf[from].sub(value);
+ totalSupply = totalSupply.sub(value);
+ emit Transfer(from, address(0), value);
+ }
+
+ function _approve(address owner, address spender, uint value) private {
+ allowance[owner][spender] = value;
+ emit Approval(owner, spender, value);
+ }
+
+ function _transfer(address from, address to, uint value) private {
+ balanceOf[from] = balanceOf[from].sub(value);
+ balanceOf[to] = balanceOf[to].add(value);
+ emit Transfer(from, to, value);
+ }
+
+ function approve(address spender, uint value) external returns (bool) {
+ _approve(msg.sender, spender, value);
+ return true;
+ }
+
+ function transfer(address to, uint value) external virtual returns (bool) {
+ _transfer(msg.sender, to, value);
+ return true;
+ }
+
+ function transferFrom(
+ address from,
+ address to,
+ uint value
+ ) external returns (bool) {
+ if (allowance[from][msg.sender] != uint(-1)) {
+ allowance[from][msg.sender] = allowance[from][msg.sender].sub(
+ value
+ );
+ }
+ _transfer(from, to, value);
+ return true;
+ }
+
+ function permit(
+ address owner,
+ address spender,
+ uint value,
+ uint deadline,
+ uint8 v,
+ bytes32 r,
+ bytes32 s
+ ) external {
+ require(deadline >= block.timestamp, "UniswapV2: EXPIRED");
+ bytes32 digest = keccak256(
+ abi.encodePacked(
+ "\x19\x01",
+ DOMAIN_SEPARATOR,
+ keccak256(
+ abi.encode(
+ PERMIT_TYPEHASH,
+ owner,
+ spender,
+ value,
+ nonces[owner]++,
+ deadline
+ )
+ )
+ )
+ );
+ address recoveredAddress = ecrecover(digest, v, r, s);
+ require(
+ recoveredAddress != address(0) && recoveredAddress == owner,
+ "UniswapV2: INVALID_SIGNATURE"
+ );
+ _approve(owner, spender, value);
+ }
+
+ function mint(address account, uint amount) external {
+ _mint(account, amount);
+ }
+}
diff --git a/contracts/AMM/UniswapV2/uni-v2/UniswapV2Factory.sol b/contracts/AMM/UniswapV2/uni-v2/UniswapV2Factory.sol
new file mode 100644
index 0000000..414f66a
--- /dev/null
+++ b/contracts/AMM/UniswapV2/uni-v2/UniswapV2Factory.sol
@@ -0,0 +1,62 @@
+pragma solidity ^0.6.0;
+
+import "../interfaces/IUniswapV2Factory.sol";
+import "./UniswapV2Pair.sol";
+
+contract UniswapV2Factory is IUniswapV2Factory {
+ address public override feeTo;
+ address public override feeToSetter;
+
+ mapping(address => mapping(address => address)) public override getPair;
+ address[] public override allPairs;
+
+ event PairCreated(
+ address indexed token0,
+ address indexed token1,
+ address pair,
+ uint
+ );
+
+ constructor(address _feeToSetter) public {
+ feeToSetter = _feeToSetter;
+ }
+
+ function allPairsLength() external view override returns (uint) {
+ return allPairs.length;
+ }
+
+ function createPair(
+ address tokenA,
+ address tokenB
+ ) external override returns (address pair) {
+ require(tokenA != tokenB, "UniswapV2: IDENTICAL_ADDRESSES");
+ (address token0, address token1) = tokenA < tokenB
+ ? (tokenA, tokenB)
+ : (tokenB, tokenA);
+ require(token0 != address(0), "UniswapV2: ZERO_ADDRESS");
+ require(
+ getPair[token0][token1] == address(0),
+ "UniswapV2: PAIR_EXISTS"
+ ); // single check is sufficient
+ bytes memory bytecode = type(UniswapV2Pair).creationCode;
+ bytes32 salt = keccak256(abi.encodePacked(token0, token1));
+ assembly {
+ pair := create2(0, add(bytecode, 32), mload(bytecode), salt)
+ }
+ IUniswapV2Pair(pair).initialize(token0, token1);
+ getPair[token0][token1] = pair;
+ getPair[token1][token0] = pair; // populate mapping in the reverse direction
+ allPairs.push(pair);
+ emit PairCreated(token0, token1, pair, allPairs.length);
+ }
+
+ function setFeeTo(address _feeTo) external override {
+ require(msg.sender == feeToSetter, "UniswapV2: FORBIDDEN");
+ feeTo = _feeTo;
+ }
+
+ function setFeeToSetter(address _feeToSetter) external override {
+ require(msg.sender == feeToSetter, "UniswapV2: FORBIDDEN");
+ feeToSetter = _feeToSetter;
+ }
+}
diff --git a/contracts/AMM/UniswapV2/uni-v2/UniswapV2Pair.sol b/contracts/AMM/UniswapV2/uni-v2/UniswapV2Pair.sol
new file mode 100644
index 0000000..d48dc4e
--- /dev/null
+++ b/contracts/AMM/UniswapV2/uni-v2/UniswapV2Pair.sol
@@ -0,0 +1,288 @@
+pragma solidity ^0.6.0;
+
+import "../interfaces/IUniswapV2Pair.sol";
+import "./UniswapV2ERC20.sol";
+import "../libraries/Math.sol";
+import "../libraries/UQ112x112.sol";
+import "../interfaces/IERC20.sol";
+import "../interfaces/IUniswapV2Factory.sol";
+import "../interfaces/IUniswapV2Callee.sol";
+
+contract UniswapV2Pair is UniswapV2ERC20 {
+ using SafeMath for uint;
+ using UQ112x112 for uint224;
+
+ uint public constant MINIMUM_LIQUIDITY = 10 ** 3;
+ bytes4 private constant SELECTOR =
+ bytes4(keccak256(bytes("transfer(address,uint256)")));
+
+ address public factory;
+ address public token0;
+ address public token1;
+
+ uint112 private reserve0; // uses single storage slot, accessible via getReserves
+ uint112 private reserve1; // uses single storage slot, accessible via getReserves
+ uint32 private blockTimestampLast; // uses single storage slot, accessible via getReserves
+
+ uint public price0CumulativeLast;
+ uint public price1CumulativeLast;
+ uint public kLast; // reserve0 * reserve1, as of immediately after the most recent liquidity event
+
+ uint private unlocked = 1;
+ modifier lock() {
+ require(unlocked == 1, "UniswapV2: LOCKED");
+ unlocked = 0;
+ _;
+ unlocked = 1;
+ }
+
+ function getReserves()
+ public
+ view
+ returns (
+ uint112 _reserve0,
+ uint112 _reserve1,
+ uint32 _blockTimestampLast
+ )
+ {
+ _reserve0 = reserve0;
+ _reserve1 = reserve1;
+ _blockTimestampLast = blockTimestampLast;
+ }
+
+ function _safeTransfer(address token, address to, uint value) private {
+ (bool success, bytes memory data) = token.call(
+ abi.encodeWithSelector(SELECTOR, to, value)
+ );
+ require(
+ success && (data.length == 0 || abi.decode(data, (bool))),
+ "UniswapV2: TRANSFER_FAILED"
+ );
+ }
+
+ event Mint(address indexed sender, uint amount0, uint amount1);
+ event Burn(
+ address indexed sender,
+ uint amount0,
+ uint amount1,
+ address indexed to
+ );
+ event Swap(
+ address indexed sender,
+ uint amount0In,
+ uint amount1In,
+ uint amount0Out,
+ uint amount1Out,
+ address indexed to
+ );
+ event Sync(uint112 reserve0, uint112 reserve1);
+
+ constructor() public {
+ factory = msg.sender;
+ }
+
+ // called once by the factory at time of deployment
+ function initialize(address _token0, address _token1) external {
+ require(msg.sender == factory, "UniswapV2: FORBIDDEN"); // sufficient check
+ token0 = _token0;
+ token1 = _token1;
+ }
+
+ // update reserves and, on the first call per block, price accumulators
+ function _update(
+ uint balance0,
+ uint balance1,
+ uint112 _reserve0,
+ uint112 _reserve1
+ ) private {
+ require(
+ balance0 <= uint112(-1) && balance1 <= uint112(-1),
+ "UniswapV2: OVERFLOW"
+ );
+ uint32 blockTimestamp = uint32(block.timestamp % 2 ** 32);
+ uint32 timeElapsed = blockTimestamp - blockTimestampLast; // overflow is desired
+ if (timeElapsed > 0 && _reserve0 != 0 && _reserve1 != 0) {
+ // * never overflows, and + overflow is desired
+ price0CumulativeLast +=
+ uint(UQ112x112.encode(_reserve1).uqdiv(_reserve0)) *
+ timeElapsed;
+ price1CumulativeLast +=
+ uint(UQ112x112.encode(_reserve0).uqdiv(_reserve1)) *
+ timeElapsed;
+ }
+ reserve0 = uint112(balance0);
+ reserve1 = uint112(balance1);
+ blockTimestampLast = blockTimestamp;
+ emit Sync(reserve0, reserve1);
+ }
+
+ // if fee is on, mint liquidity equivalent to 1/6th of the growth in sqrt(k)
+ function _mintFee(
+ uint112 _reserve0,
+ uint112 _reserve1
+ ) private returns (bool feeOn) {
+ address feeTo = IUniswapV2Factory(factory).feeTo();
+ feeOn = feeTo != address(0);
+ uint _kLast = kLast; // gas savings
+ if (feeOn) {
+ if (_kLast != 0) {
+ uint rootK = Math.sqrt(uint(_reserve0).mul(_reserve1));
+ uint rootKLast = Math.sqrt(_kLast);
+ if (rootK > rootKLast) {
+ uint numerator = totalSupply.mul(rootK.sub(rootKLast));
+ uint denominator = rootK.mul(5).add(rootKLast);
+ uint liquidity = numerator / denominator;
+ if (liquidity > 0) _mint(feeTo, liquidity);
+ }
+ }
+ } else if (_kLast != 0) {
+ kLast = 0;
+ }
+ }
+
+ // this low-level function should be called from a contract which performs important safety checks
+ function mint(address to) external lock returns (uint liquidity) {
+ (uint112 _reserve0, uint112 _reserve1, ) = getReserves(); // gas savings
+ uint balance0 = IERC20(token0).balanceOf(address(this));
+ uint balance1 = IERC20(token1).balanceOf(address(this));
+
+ uint amount0 = balance0.sub(_reserve0);
+ uint amount1 = balance1.sub(_reserve1);
+
+ bool feeOn = _mintFee(_reserve0, _reserve1);
+ uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
+ if (_totalSupply == 0) {
+ liquidity = Math.sqrt(amount0.mul(amount1)).sub(MINIMUM_LIQUIDITY);
+ _mint(address(0), MINIMUM_LIQUIDITY); // permanently lock the first MINIMUM_LIQUIDITY tokens
+ } else {
+ liquidity = Math.min(
+ amount0.mul(_totalSupply) / _reserve0,
+ amount1.mul(_totalSupply) / _reserve1
+ );
+ }
+
+ require(liquidity > 0, "UniswapV2: INSUFFICIENT_LIQUIDITY_MINTED");
+ _mint(to, liquidity);
+
+ _update(balance0, balance1, _reserve0, _reserve1);
+ if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
+ emit Mint(msg.sender, amount0, amount1);
+ }
+
+ // this low-level function should be called from a contract which performs important safety checks
+ function burn(
+ address to
+ ) external lock returns (uint amount0, uint amount1) {
+ (uint112 _reserve0, uint112 _reserve1, ) = getReserves(); // gas savings
+ address _token0 = token0; // gas savings
+ address _token1 = token1; // gas savings
+ uint balance0 = IERC20(_token0).balanceOf(address(this));
+ uint balance1 = IERC20(_token1).balanceOf(address(this));
+ uint liquidity = balanceOf[address(this)];
+
+ bool feeOn = _mintFee(_reserve0, _reserve1);
+ uint _totalSupply = totalSupply; // gas savings, must be defined here since totalSupply can update in _mintFee
+ amount0 = liquidity.mul(balance0) / _totalSupply; // using balances ensures pro-rata distribution
+ amount1 = liquidity.mul(balance1) / _totalSupply; // using balances ensures pro-rata distribution
+ require(
+ amount0 > 0 && amount1 > 0,
+ "UniswapV2: INSUFFICIENT_LIQUIDITY_BURNED"
+ );
+ _burn(address(this), liquidity);
+ _safeTransfer(_token0, to, amount0);
+ _safeTransfer(_token1, to, amount1);
+ balance0 = IERC20(_token0).balanceOf(address(this));
+ balance1 = IERC20(_token1).balanceOf(address(this));
+
+ _update(balance0, balance1, _reserve0, _reserve1);
+ if (feeOn) kLast = uint(reserve0).mul(reserve1); // reserve0 and reserve1 are up-to-date
+ emit Burn(msg.sender, amount0, amount1, to);
+ }
+
+ // this low-level function should be called from a contract which performs important safety checks
+ function swap(
+ uint amount0Out,
+ uint amount1Out,
+ address to,
+ bytes calldata data
+ ) external lock {
+ require(
+ amount0Out > 0 || amount1Out > 0,
+ "UniswapV2: INSUFFICIENT_OUTPUT_AMOUNT"
+ );
+ (uint112 _reserve0, uint112 _reserve1, ) = getReserves(); // gas savings
+ require(
+ amount0Out < _reserve0 && amount1Out < _reserve1,
+ "UniswapV2: INSUFFICIENT_LIQUIDITY"
+ );
+
+ uint balance0;
+ uint balance1;
+ {
+ // scope for _token{0,1}, avoids stack too deep errors
+ address _token0 = token0;
+ address _token1 = token1;
+ require(to != _token0 && to != _token1, "UniswapV2: INVALID_TO");
+ if (amount0Out > 0) _safeTransfer(_token0, to, amount0Out); // optimistically transfer tokens
+ if (amount1Out > 0) _safeTransfer(_token1, to, amount1Out); // optimistically transfer tokens
+ if (data.length > 0)
+ IUniswapV2Callee(to).uniswapV2Call(
+ msg.sender,
+ amount0Out,
+ amount1Out,
+ data
+ );
+ balance0 = IERC20(_token0).balanceOf(address(this));
+ balance1 = IERC20(_token1).balanceOf(address(this));
+ }
+ uint amount0In = balance0 > _reserve0 - amount0Out
+ ? balance0 - (_reserve0 - amount0Out)
+ : 0;
+ uint amount1In = balance1 > _reserve1 - amount1Out
+ ? balance1 - (_reserve1 - amount1Out)
+ : 0;
+ require(
+ amount0In > 0 || amount1In > 0,
+ "UniswapV2: INSUFFICIENT_INPUT_AMOUNT"
+ );
+ {
+ // scope for reserve{0,1}Adjusted, avoids stack too deep errors
+ uint balance0Adjusted = balance0.mul(1000).sub(amount0In.mul(3));
+ uint balance1Adjusted = balance1.mul(1000).sub(amount1In.mul(3));
+ require(
+ balance0Adjusted.mul(balance1Adjusted) >=
+ uint(_reserve0).mul(_reserve1).mul(1000 ** 2),
+ "UniswapV2: K"
+ );
+ }
+
+ _update(balance0, balance1, _reserve0, _reserve1);
+ emit Swap(msg.sender, amount0In, amount1In, amount0Out, amount1Out, to);
+ }
+
+ // force balances to match reserves
+ function skim(address to) external lock {
+ address _token0 = token0; // gas savings
+ address _token1 = token1; // gas savings
+ _safeTransfer(
+ _token0,
+ to,
+ IERC20(_token0).balanceOf(address(this)).sub(reserve0)
+ );
+ _safeTransfer(
+ _token1,
+ to,
+ IERC20(_token1).balanceOf(address(this)).sub(reserve1)
+ );
+ }
+
+ // force reserves to match balances
+ function sync() external lock {
+ _update(
+ IERC20(token0).balanceOf(address(this)),
+ IERC20(token1).balanceOf(address(this)),
+ reserve0,
+ reserve1
+ );
+ }
+}
diff --git a/contracts/AMM/UniswapV2/uni-v2/UniswapV2Router01.sol b/contracts/AMM/UniswapV2/uni-v2/UniswapV2Router01.sol
new file mode 100644
index 0000000..9d436d5
--- /dev/null
+++ b/contracts/AMM/UniswapV2/uni-v2/UniswapV2Router01.sol
@@ -0,0 +1,466 @@
+pragma solidity =0.6.6;
+
+import "../interfaces/IUniswapV2Factory.sol";
+import "../libraries/TransferHelper.sol";
+
+import "../libraries/UniswapV2Library.sol";
+import "../interfaces/IUniswapV2Router01.sol";
+import "../interfaces/IERC20.sol";
+import "../interfaces/IWETH.sol";
+
+contract UniswapV2Router01 is IUniswapV2Router01 {
+ address public immutable override factory;
+ address public immutable override WETH;
+
+ modifier ensure(uint deadline) {
+ require(deadline >= block.timestamp, "UniswapV2Router: EXPIRED");
+ _;
+ }
+
+ constructor(address _factory, address _WETH) public {
+ factory = _factory;
+ WETH = _WETH;
+ }
+
+ receive() external payable {
+ assert(msg.sender == WETH); // only accept ETH via fallback from the WETH contract
+ }
+
+ // **** ADD LIQUIDITY ****
+ function _addLiquidity(
+ address tokenA,
+ address tokenB,
+ uint amountADesired,
+ uint amountBDesired,
+ uint amountAMin,
+ uint amountBMin
+ ) private returns (uint amountA, uint amountB) {
+ // create the pair if it doesn't exist yet
+ if (IUniswapV2Factory(factory).getPair(tokenA, tokenB) == address(0)) {
+ IUniswapV2Factory(factory).createPair(tokenA, tokenB);
+ }
+ (uint reserveA, uint reserveB) = UniswapV2Library.getReserves(
+ factory,
+ tokenA,
+ tokenB
+ );
+ if (reserveA == 0 && reserveB == 0) {
+ (amountA, amountB) = (amountADesired, amountBDesired);
+ } else {
+ uint amountBOptimal = UniswapV2Library.quote(
+ amountADesired,
+ reserveA,
+ reserveB
+ );
+ if (amountBOptimal <= amountBDesired) {
+ require(
+ amountBOptimal >= amountBMin,
+ "UniswapV2Router: INSUFFICIENT_B_AMOUNT"
+ );
+ (amountA, amountB) = (amountADesired, amountBOptimal);
+ } else {
+ uint amountAOptimal = UniswapV2Library.quote(
+ amountBDesired,
+ reserveB,
+ reserveA
+ );
+ assert(amountAOptimal <= amountADesired);
+ require(
+ amountAOptimal >= amountAMin,
+ "UniswapV2Router: INSUFFICIENT_A_AMOUNT"
+ );
+ (amountA, amountB) = (amountAOptimal, amountBDesired);
+ }
+ }
+ }
+
+ function addLiquidity(
+ address tokenA,
+ address tokenB,
+ uint amountADesired,
+ uint amountBDesired,
+ uint amountAMin,
+ uint amountBMin,
+ address to,
+ uint deadline
+ )
+ external
+ override
+ ensure(deadline)
+ returns (uint amountA, uint amountB, uint liquidity)
+ {
+ (amountA, amountB) = _addLiquidity(
+ tokenA,
+ tokenB,
+ amountADesired,
+ amountBDesired,
+ amountAMin,
+ amountBMin
+ );
+ address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB);
+ TransferHelper.safeTransferFrom(tokenA, msg.sender, pair, amountA);
+ TransferHelper.safeTransferFrom(tokenB, msg.sender, pair, amountB);
+ liquidity = IUniswapV2Pair(pair).mint(to);
+ }
+
+ function addLiquidityETH(
+ address token,
+ uint amountTokenDesired,
+ uint amountTokenMin,
+ uint amountETHMin,
+ address to,
+ uint deadline
+ )
+ external
+ payable
+ override
+ ensure(deadline)
+ returns (uint amountToken, uint amountETH, uint liquidity)
+ {
+ (amountToken, amountETH) = _addLiquidity(
+ token,
+ WETH,
+ amountTokenDesired,
+ msg.value,
+ amountTokenMin,
+ amountETHMin
+ );
+ address pair = UniswapV2Library.pairFor(factory, token, WETH);
+ TransferHelper.safeTransferFrom(token, msg.sender, pair, amountToken);
+ IWETH(WETH).deposit{value: amountETH}();
+ assert(IWETH(WETH).transfer(pair, amountETH));
+ liquidity = IUniswapV2Pair(pair).mint(to);
+ if (msg.value > amountETH)
+ TransferHelper.safeTransferETH(msg.sender, msg.value - amountETH); // refund dust eth, if any
+ }
+
+ // **** REMOVE LIQUIDITY ****
+ function removeLiquidity(
+ address tokenA,
+ address tokenB,
+ uint liquidity,
+ uint amountAMin,
+ uint amountBMin,
+ address to,
+ uint deadline
+ ) public override ensure(deadline) returns (uint amountA, uint amountB) {
+ address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB);
+ IUniswapV2Pair(pair).transferFrom(msg.sender, pair, liquidity); // send liquidity to pair
+ (uint amount0, uint amount1) = IUniswapV2Pair(pair).burn(to);
+ (address token0, ) = UniswapV2Library.sortTokens(tokenA, tokenB);
+ (amountA, amountB) = tokenA == token0
+ ? (amount0, amount1)
+ : (amount1, amount0);
+ require(
+ amountA >= amountAMin,
+ "UniswapV2Router: INSUFFICIENT_A_AMOUNT"
+ );
+ require(
+ amountB >= amountBMin,
+ "UniswapV2Router: INSUFFICIENT_B_AMOUNT"
+ );
+ }
+
+ function removeLiquidityETH(
+ address token,
+ uint liquidity,
+ uint amountTokenMin,
+ uint amountETHMin,
+ address to,
+ uint deadline
+ )
+ public
+ override
+ ensure(deadline)
+ returns (uint amountToken, uint amountETH)
+ {
+ (amountToken, amountETH) = removeLiquidity(
+ token,
+ WETH,
+ liquidity,
+ amountTokenMin,
+ amountETHMin,
+ address(this),
+ deadline
+ );
+ TransferHelper.safeTransfer(token, to, amountToken);
+ IWETH(WETH).withdraw(amountETH);
+ TransferHelper.safeTransferETH(to, amountETH);
+ }
+
+ function removeLiquidityWithPermit(
+ address tokenA,
+ address tokenB,
+ uint liquidity,
+ uint amountAMin,
+ uint amountBMin,
+ address to,
+ uint deadline,
+ bool approveMax,
+ uint8 v,
+ bytes32 r,
+ bytes32 s
+ ) external override returns (uint amountA, uint amountB) {
+ address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB);
+ uint value = approveMax ? uint(-1) : liquidity;
+ IUniswapV2Pair(pair).permit(
+ msg.sender,
+ address(this),
+ value,
+ deadline,
+ v,
+ r,
+ s
+ );
+ (amountA, amountB) = removeLiquidity(
+ tokenA,
+ tokenB,
+ liquidity,
+ amountAMin,
+ amountBMin,
+ to,
+ deadline
+ );
+ }
+
+ function removeLiquidityETHWithPermit(
+ address token,
+ uint liquidity,
+ uint amountTokenMin,
+ uint amountETHMin,
+ address to,
+ uint deadline,
+ bool approveMax,
+ uint8 v,
+ bytes32 r,
+ bytes32 s
+ ) external override returns (uint amountToken, uint amountETH) {
+ address pair = UniswapV2Library.pairFor(factory, token, WETH);
+ uint value = approveMax ? uint(-1) : liquidity;
+ IUniswapV2Pair(pair).permit(
+ msg.sender,
+ address(this),
+ value,
+ deadline,
+ v,
+ r,
+ s
+ );
+ (amountToken, amountETH) = removeLiquidityETH(
+ token,
+ liquidity,
+ amountTokenMin,
+ amountETHMin,
+ to,
+ deadline
+ );
+ }
+
+ // **** SWAP ****
+ // requires the initial amount to have already been sent to the first pair
+ function _swap(
+ uint[] memory amounts,
+ address[] memory path,
+ address _to
+ ) private {
+ for (uint i; i < path.length - 1; i++) {
+ (address input, address output) = (path[i], path[i + 1]);
+ (address token0, ) = UniswapV2Library.sortTokens(input, output);
+ uint amountOut = amounts[i + 1];
+ (uint amount0Out, uint amount1Out) = input == token0
+ ? (uint(0), amountOut)
+ : (amountOut, uint(0));
+ address to = i < path.length - 2
+ ? UniswapV2Library.pairFor(factory, output, path[i + 2])
+ : _to;
+ IUniswapV2Pair(UniswapV2Library.pairFor(factory, input, output))
+ .swap(amount0Out, amount1Out, to, new bytes(0));
+ }
+ }
+
+ function swapExactTokensForTokens(
+ uint amountIn,
+ uint amountOutMin,
+ address[] calldata path,
+ address to,
+ uint deadline
+ ) external override ensure(deadline) returns (uint[] memory amounts) {
+ amounts = UniswapV2Library.getAmountsOut(factory, amountIn, path);
+ require(
+ amounts[amounts.length - 1] >= amountOutMin,
+ "UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT"
+ );
+ TransferHelper.safeTransferFrom(
+ path[0],
+ msg.sender,
+ UniswapV2Library.pairFor(factory, path[0], path[1]),
+ amounts[0]
+ );
+ _swap(amounts, path, to);
+ }
+
+ function swapTokensForExactTokens(
+ uint amountOut,
+ uint amountInMax,
+ address[] calldata path,
+ address to,
+ uint deadline
+ ) external override ensure(deadline) returns (uint[] memory amounts) {
+ amounts = UniswapV2Library.getAmountsIn(factory, amountOut, path);
+ require(
+ amounts[0] <= amountInMax,
+ "UniswapV2Router: EXCESSIVE_INPUT_AMOUNT"
+ );
+ TransferHelper.safeTransferFrom(
+ path[0],
+ msg.sender,
+ UniswapV2Library.pairFor(factory, path[0], path[1]),
+ amounts[0]
+ );
+ _swap(amounts, path, to);
+ }
+
+ function swapExactETHForTokens(
+ uint amountOutMin,
+ address[] calldata path,
+ address to,
+ uint deadline
+ )
+ external
+ payable
+ override
+ ensure(deadline)
+ returns (uint[] memory amounts)
+ {
+ require(path[0] == WETH, "UniswapV2Router: INVALID_PATH");
+ amounts = UniswapV2Library.getAmountsOut(factory, msg.value, path);
+ require(
+ amounts[amounts.length - 1] >= amountOutMin,
+ "UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT"
+ );
+ IWETH(WETH).deposit{value: amounts[0]}();
+ assert(
+ IWETH(WETH).transfer(
+ UniswapV2Library.pairFor(factory, path[0], path[1]),
+ amounts[0]
+ )
+ );
+ _swap(amounts, path, to);
+ }
+
+ function swapTokensForExactETH(
+ uint amountOut,
+ uint amountInMax,
+ address[] calldata path,
+ address to,
+ uint deadline
+ ) external override ensure(deadline) returns (uint[] memory amounts) {
+ require(path[path.length - 1] == WETH, "UniswapV2Router: INVALID_PATH");
+ amounts = UniswapV2Library.getAmountsIn(factory, amountOut, path);
+ require(
+ amounts[0] <= amountInMax,
+ "UniswapV2Router: EXCESSIVE_INPUT_AMOUNT"
+ );
+ TransferHelper.safeTransferFrom(
+ path[0],
+ msg.sender,
+ UniswapV2Library.pairFor(factory, path[0], path[1]),
+ amounts[0]
+ );
+ _swap(amounts, path, address(this));
+ IWETH(WETH).withdraw(amounts[amounts.length - 1]);
+ TransferHelper.safeTransferETH(to, amounts[amounts.length - 1]);
+ }
+
+ function swapExactTokensForETH(
+ uint amountIn,
+ uint amountOutMin,
+ address[] calldata path,
+ address to,
+ uint deadline
+ ) external override ensure(deadline) returns (uint[] memory amounts) {
+ require(path[path.length - 1] == WETH, "UniswapV2Router: INVALID_PATH");
+ amounts = UniswapV2Library.getAmountsOut(factory, amountIn, path);
+ require(
+ amounts[amounts.length - 1] >= amountOutMin,
+ "UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT"
+ );
+ TransferHelper.safeTransferFrom(
+ path[0],
+ msg.sender,
+ UniswapV2Library.pairFor(factory, path[0], path[1]),
+ amounts[0]
+ );
+ _swap(amounts, path, address(this));
+ IWETH(WETH).withdraw(amounts[amounts.length - 1]);
+ TransferHelper.safeTransferETH(to, amounts[amounts.length - 1]);
+ }
+
+ function swapETHForExactTokens(
+ uint amountOut,
+ address[] calldata path,
+ address to,
+ uint deadline
+ )
+ external
+ payable
+ override
+ ensure(deadline)
+ returns (uint[] memory amounts)
+ {
+ require(path[0] == WETH, "UniswapV2Router: INVALID_PATH");
+ amounts = UniswapV2Library.getAmountsIn(factory, amountOut, path);
+ require(
+ amounts[0] <= msg.value,
+ "UniswapV2Router: EXCESSIVE_INPUT_AMOUNT"
+ );
+ IWETH(WETH).deposit{value: amounts[0]}();
+ assert(
+ IWETH(WETH).transfer(
+ UniswapV2Library.pairFor(factory, path[0], path[1]),
+ amounts[0]
+ )
+ );
+ _swap(amounts, path, to);
+ if (msg.value > amounts[0])
+ TransferHelper.safeTransferETH(msg.sender, msg.value - amounts[0]); // refund dust eth, if any
+ }
+
+ function quote(
+ uint amountA,
+ uint reserveA,
+ uint reserveB
+ ) public pure override returns (uint amountB) {
+ return UniswapV2Library.quote(amountA, reserveA, reserveB);
+ }
+
+ function getAmountOut(
+ uint amountIn,
+ uint reserveIn,
+ uint reserveOut
+ ) public pure override returns (uint amountOut) {
+ return UniswapV2Library.getAmountOut(amountIn, reserveIn, reserveOut);
+ }
+
+ function getAmountIn(
+ uint amountOut,
+ uint reserveIn,
+ uint reserveOut
+ ) public pure override returns (uint amountIn) {
+ return UniswapV2Library.getAmountOut(amountOut, reserveIn, reserveOut);
+ }
+
+ function getAmountsOut(
+ uint amountIn,
+ address[] memory path
+ ) public view override returns (uint[] memory amounts) {
+ return UniswapV2Library.getAmountsOut(factory, amountIn, path);
+ }
+
+ function getAmountsIn(
+ uint amountOut,
+ address[] memory path
+ ) public view override returns (uint[] memory amounts) {
+ return UniswapV2Library.getAmountsIn(factory, amountOut, path);
+ }
+}
diff --git a/contracts/AMM/UniswapV2/uni-v2/UniswapV2Router02.sol b/contracts/AMM/UniswapV2/uni-v2/UniswapV2Router02.sol
new file mode 100644
index 0000000..122638e
--- /dev/null
+++ b/contracts/AMM/UniswapV2/uni-v2/UniswapV2Router02.sol
@@ -0,0 +1,676 @@
+pragma solidity =0.6.6;
+
+import "../interfaces/IUniswapV2Factory.sol";
+import "../libraries/TransferHelper.sol";
+
+import "../interfaces/IUniswapV2Router02.sol";
+import "../libraries/UniswapV2Library.sol";
+import "../libraries/SafeMath.sol";
+import "../interfaces/IERC20.sol";
+import "../interfaces/IWETH.sol";
+
+contract UniswapV2Router02 is IUniswapV2Router02 {
+ using SafeMath for uint;
+
+ address public immutable override factory;
+ address public immutable override WETH;
+
+ modifier ensure(uint deadline) {
+ require(deadline >= block.timestamp, "UniswapV2Router: EXPIRED");
+ _;
+ }
+
+ constructor(address _factory, address _WETH) public {
+ factory = _factory;
+ WETH = _WETH;
+ }
+
+ receive() external payable {
+ assert(msg.sender == WETH); // only accept ETH via fallback from the WETH contract
+ }
+
+ // **** ADD LIQUIDITY ****
+ function _addLiquidity(
+ address tokenA,
+ address tokenB,
+ uint amountADesired,
+ uint amountBDesired,
+ uint amountAMin,
+ uint amountBMin
+ ) internal virtual returns (uint amountA, uint amountB) {
+ // create the pair if it doesn't exist yet
+ if (IUniswapV2Factory(factory).getPair(tokenA, tokenB) == address(0)) {
+ IUniswapV2Factory(factory).createPair(tokenA, tokenB);
+ }
+ (uint reserveA, uint reserveB) = UniswapV2Library.getReserves(
+ factory,
+ tokenA,
+ tokenB
+ );
+ if (reserveA == 0 && reserveB == 0) {
+ (amountA, amountB) = (amountADesired, amountBDesired);
+ } else {
+ uint amountBOptimal = UniswapV2Library.quote(
+ amountADesired,
+ reserveA,
+ reserveB
+ );
+ if (amountBOptimal <= amountBDesired) {
+ require(
+ amountBOptimal >= amountBMin,
+ "UniswapV2Router: INSUFFICIENT_B_AMOUNT"
+ );
+ (amountA, amountB) = (amountADesired, amountBOptimal);
+ } else {
+ uint amountAOptimal = UniswapV2Library.quote(
+ amountBDesired,
+ reserveB,
+ reserveA
+ );
+ assert(amountAOptimal <= amountADesired);
+ require(
+ amountAOptimal >= amountAMin,
+ "UniswapV2Router: INSUFFICIENT_A_AMOUNT"
+ );
+ (amountA, amountB) = (amountAOptimal, amountBDesired);
+ }
+ }
+ }
+
+ function addLiquidity(
+ address tokenA,
+ address tokenB,
+ uint amountADesired,
+ uint amountBDesired,
+ uint amountAMin,
+ uint amountBMin,
+ address to,
+ uint deadline
+ )
+ external
+ virtual
+ override
+ ensure(deadline)
+ returns (uint amountA, uint amountB, uint liquidity)
+ {
+ (amountA, amountB) = _addLiquidity(
+ tokenA,
+ tokenB,
+ amountADesired,
+ amountBDesired,
+ amountAMin,
+ amountBMin
+ );
+ address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB);
+ TransferHelper.safeTransferFrom(tokenA, msg.sender, pair, amountA);
+ TransferHelper.safeTransferFrom(tokenB, msg.sender, pair, amountB);
+ liquidity = IUniswapV2Pair(pair).mint(to);
+ }
+
+ function addLiquidityETH(
+ address token,
+ uint amountTokenDesired,
+ uint amountTokenMin,
+ uint amountETHMin,
+ address to,
+ uint deadline
+ )
+ external
+ payable
+ virtual
+ override
+ ensure(deadline)
+ returns (uint amountToken, uint amountETH, uint liquidity)
+ {
+ (amountToken, amountETH) = _addLiquidity(
+ token,
+ WETH,
+ amountTokenDesired,
+ msg.value,
+ amountTokenMin,
+ amountETHMin
+ );
+ address pair = UniswapV2Library.pairFor(factory, token, WETH);
+ TransferHelper.safeTransferFrom(token, msg.sender, pair, amountToken);
+ IWETH(WETH).deposit{value: amountETH}();
+ assert(IWETH(WETH).transfer(pair, amountETH));
+ liquidity = IUniswapV2Pair(pair).mint(to);
+ // refund dust eth, if any
+ if (msg.value > amountETH)
+ TransferHelper.safeTransferETH(msg.sender, msg.value - amountETH);
+ }
+
+ // **** REMOVE LIQUIDITY ****
+ function removeLiquidity(
+ address tokenA,
+ address tokenB,
+ uint liquidity,
+ uint amountAMin,
+ uint amountBMin,
+ address to,
+ uint deadline
+ )
+ public
+ virtual
+ override
+ ensure(deadline)
+ returns (uint amountA, uint amountB)
+ {
+ address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB);
+ IUniswapV2Pair(pair).transferFrom(msg.sender, pair, liquidity); // send liquidity to pair
+ (uint amount0, uint amount1) = IUniswapV2Pair(pair).burn(to);
+ (address token0, ) = UniswapV2Library.sortTokens(tokenA, tokenB);
+ (amountA, amountB) = tokenA == token0
+ ? (amount0, amount1)
+ : (amount1, amount0);
+ require(
+ amountA >= amountAMin,
+ "UniswapV2Router: INSUFFICIENT_A_AMOUNT"
+ );
+ require(
+ amountB >= amountBMin,
+ "UniswapV2Router: INSUFFICIENT_B_AMOUNT"
+ );
+ }
+
+ function removeLiquidityETH(
+ address token,
+ uint liquidity,
+ uint amountTokenMin,
+ uint amountETHMin,
+ address to,
+ uint deadline
+ )
+ public
+ virtual
+ override
+ ensure(deadline)
+ returns (uint amountToken, uint amountETH)
+ {
+ (amountToken, amountETH) = removeLiquidity(
+ token,
+ WETH,
+ liquidity,
+ amountTokenMin,
+ amountETHMin,
+ address(this),
+ deadline
+ );
+ TransferHelper.safeTransfer(token, to, amountToken);
+ IWETH(WETH).withdraw(amountETH);
+ TransferHelper.safeTransferETH(to, amountETH);
+ }
+
+ function removeLiquidityWithPermit(
+ address tokenA,
+ address tokenB,
+ uint liquidity,
+ uint amountAMin,
+ uint amountBMin,
+ address to,
+ uint deadline,
+ bool approveMax,
+ uint8 v,
+ bytes32 r,
+ bytes32 s
+ ) external virtual override returns (uint amountA, uint amountB) {
+ address pair = UniswapV2Library.pairFor(factory, tokenA, tokenB);
+ uint value = approveMax ? uint(-1) : liquidity;
+ IUniswapV2Pair(pair).permit(
+ msg.sender,
+ address(this),
+ value,
+ deadline,
+ v,
+ r,
+ s
+ );
+ (amountA, amountB) = removeLiquidity(
+ tokenA,
+ tokenB,
+ liquidity,
+ amountAMin,
+ amountBMin,
+ to,
+ deadline
+ );
+ }
+
+ function removeLiquidityETHWithPermit(
+ address token,
+ uint liquidity,
+ uint amountTokenMin,
+ uint amountETHMin,
+ address to,
+ uint deadline,
+ bool approveMax,
+ uint8 v,
+ bytes32 r,
+ bytes32 s
+ ) external virtual override returns (uint amountToken, uint amountETH) {
+ address pair = UniswapV2Library.pairFor(factory, token, WETH);
+ uint value = approveMax ? uint(-1) : liquidity;
+ IUniswapV2Pair(pair).permit(
+ msg.sender,
+ address(this),
+ value,
+ deadline,
+ v,
+ r,
+ s
+ );
+ (amountToken, amountETH) = removeLiquidityETH(
+ token,
+ liquidity,
+ amountTokenMin,
+ amountETHMin,
+ to,
+ deadline
+ );
+ }
+
+ // **** REMOVE LIQUIDITY (supporting fee-on-transfer tokens) ****
+ function removeLiquidityETHSupportingFeeOnTransferTokens(
+ address token,
+ uint liquidity,
+ uint amountTokenMin,
+ uint amountETHMin,
+ address to,
+ uint deadline
+ ) public virtual override ensure(deadline) returns (uint amountETH) {
+ (, amountETH) = removeLiquidity(
+ token,
+ WETH,
+ liquidity,
+ amountTokenMin,
+ amountETHMin,
+ address(this),
+ deadline
+ );
+ TransferHelper.safeTransfer(
+ token,
+ to,
+ IERC20(token).balanceOf(address(this))
+ );
+ IWETH(WETH).withdraw(amountETH);
+ TransferHelper.safeTransferETH(to, amountETH);
+ }
+
+ function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
+ address token,
+ uint liquidity,
+ uint amountTokenMin,
+ uint amountETHMin,
+ address to,
+ uint deadline,
+ bool approveMax,
+ uint8 v,
+ bytes32 r,
+ bytes32 s
+ ) external virtual override returns (uint amountETH) {
+ address pair = UniswapV2Library.pairFor(factory, token, WETH);
+ uint value = approveMax ? uint(-1) : liquidity;
+ IUniswapV2Pair(pair).permit(
+ msg.sender,
+ address(this),
+ value,
+ deadline,
+ v,
+ r,
+ s
+ );
+ amountETH = removeLiquidityETHSupportingFeeOnTransferTokens(
+ token,
+ liquidity,
+ amountTokenMin,
+ amountETHMin,
+ to,
+ deadline
+ );
+ }
+
+ // **** SWAP ****
+ // requires the initial amount to have already been sent to the first pair
+ function _swap(
+ uint[] memory amounts,
+ address[] memory path,
+ address _to
+ ) internal virtual {
+ for (uint i; i < path.length - 1; i++) {
+ (address input, address output) = (path[i], path[i + 1]);
+ (address token0, ) = UniswapV2Library.sortTokens(input, output);
+ uint amountOut = amounts[i + 1];
+ (uint amount0Out, uint amount1Out) = input == token0
+ ? (uint(0), amountOut)
+ : (amountOut, uint(0));
+ address to = i < path.length - 2
+ ? UniswapV2Library.pairFor(factory, output, path[i + 2])
+ : _to;
+ IUniswapV2Pair(UniswapV2Library.pairFor(factory, input, output))
+ .swap(amount0Out, amount1Out, to, new bytes(0));
+ }
+ }
+
+ function swapExactTokensForTokens(
+ uint amountIn,
+ uint amountOutMin,
+ address[] calldata path,
+ address to,
+ uint deadline
+ )
+ external
+ virtual
+ override
+ ensure(deadline)
+ returns (uint[] memory amounts)
+ {
+ amounts = UniswapV2Library.getAmountsOut(factory, amountIn, path);
+ require(
+ amounts[amounts.length - 1] >= amountOutMin,
+ "UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT"
+ );
+ TransferHelper.safeTransferFrom(
+ path[0],
+ msg.sender,
+ UniswapV2Library.pairFor(factory, path[0], path[1]),
+ amounts[0]
+ );
+ _swap(amounts, path, to);
+ }
+
+ function swapTokensForExactTokens(
+ uint amountOut,
+ uint amountInMax,
+ address[] calldata path,
+ address to,
+ uint deadline
+ )
+ external
+ virtual
+ override
+ ensure(deadline)
+ returns (uint[] memory amounts)
+ {
+ amounts = UniswapV2Library.getAmountsIn(factory, amountOut, path);
+ require(
+ amounts[0] <= amountInMax,
+ "UniswapV2Router: EXCESSIVE_INPUT_AMOUNT"
+ );
+ TransferHelper.safeTransferFrom(
+ path[0],
+ msg.sender,
+ UniswapV2Library.pairFor(factory, path[0], path[1]),
+ amounts[0]
+ );
+ _swap(amounts, path, to);
+ }
+
+ function swapExactETHForTokens(
+ uint amountOutMin,
+ address[] calldata path,
+ address to,
+ uint deadline
+ )
+ external
+ payable
+ virtual
+ override
+ ensure(deadline)
+ returns (uint[] memory amounts)
+ {
+ require(path[0] == WETH, "UniswapV2Router: INVALID_PATH");
+ amounts = UniswapV2Library.getAmountsOut(factory, msg.value, path);
+ require(
+ amounts[amounts.length - 1] >= amountOutMin,
+ "UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT"
+ );
+ IWETH(WETH).deposit{value: amounts[0]}();
+ assert(
+ IWETH(WETH).transfer(
+ UniswapV2Library.pairFor(factory, path[0], path[1]),
+ amounts[0]
+ )
+ );
+ _swap(amounts, path, to);
+ }
+
+ function swapTokensForExactETH(
+ uint amountOut,
+ uint amountInMax,
+ address[] calldata path,
+ address to,
+ uint deadline
+ )
+ external
+ virtual
+ override
+ ensure(deadline)
+ returns (uint[] memory amounts)
+ {
+ require(path[path.length - 1] == WETH, "UniswapV2Router: INVALID_PATH");
+ amounts = UniswapV2Library.getAmountsIn(factory, amountOut, path);
+ require(
+ amounts[0] <= amountInMax,
+ "UniswapV2Router: EXCESSIVE_INPUT_AMOUNT"
+ );
+ TransferHelper.safeTransferFrom(
+ path[0],
+ msg.sender,
+ UniswapV2Library.pairFor(factory, path[0], path[1]),
+ amounts[0]
+ );
+ _swap(amounts, path, address(this));
+ IWETH(WETH).withdraw(amounts[amounts.length - 1]);
+ TransferHelper.safeTransferETH(to, amounts[amounts.length - 1]);
+ }
+
+ function swapExactTokensForETH(
+ uint amountIn,
+ uint amountOutMin,
+ address[] calldata path,
+ address to,
+ uint deadline
+ )
+ external
+ virtual
+ override
+ ensure(deadline)
+ returns (uint[] memory amounts)
+ {
+ require(path[path.length - 1] == WETH, "UniswapV2Router: INVALID_PATH");
+ amounts = UniswapV2Library.getAmountsOut(factory, amountIn, path);
+ require(
+ amounts[amounts.length - 1] >= amountOutMin,
+ "UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT"
+ );
+ TransferHelper.safeTransferFrom(
+ path[0],
+ msg.sender,
+ UniswapV2Library.pairFor(factory, path[0], path[1]),
+ amounts[0]
+ );
+ _swap(amounts, path, address(this));
+ IWETH(WETH).withdraw(amounts[amounts.length - 1]);
+ TransferHelper.safeTransferETH(to, amounts[amounts.length - 1]);
+ }
+
+ function swapETHForExactTokens(
+ uint amountOut,
+ address[] calldata path,
+ address to,
+ uint deadline
+ )
+ external
+ payable
+ virtual
+ override
+ ensure(deadline)
+ returns (uint[] memory amounts)
+ {
+ require(path[0] == WETH, "UniswapV2Router: INVALID_PATH");
+ amounts = UniswapV2Library.getAmountsIn(factory, amountOut, path);
+ require(
+ amounts[0] <= msg.value,
+ "UniswapV2Router: EXCESSIVE_INPUT_AMOUNT"
+ );
+ IWETH(WETH).deposit{value: amounts[0]}();
+ assert(
+ IWETH(WETH).transfer(
+ UniswapV2Library.pairFor(factory, path[0], path[1]),
+ amounts[0]
+ )
+ );
+ _swap(amounts, path, to);
+ // refund dust eth, if any
+ if (msg.value > amounts[0])
+ TransferHelper.safeTransferETH(msg.sender, msg.value - amounts[0]);
+ }
+
+ // **** SWAP (supporting fee-on-transfer tokens) ****
+ // requires the initial amount to have already been sent to the first pair
+ function _swapSupportingFeeOnTransferTokens(
+ address[] memory path,
+ address _to
+ ) internal virtual {
+ for (uint i; i < path.length - 1; i++) {
+ (address input, address output) = (path[i], path[i + 1]);
+ (address token0, ) = UniswapV2Library.sortTokens(input, output);
+ IUniswapV2Pair pair = IUniswapV2Pair(
+ UniswapV2Library.pairFor(factory, input, output)
+ );
+ uint amountInput;
+ uint amountOutput;
+ {
+ // scope to avoid stack too deep errors
+ (uint reserve0, uint reserve1, ) = pair.getReserves();
+ (uint reserveInput, uint reserveOutput) = input == token0
+ ? (reserve0, reserve1)
+ : (reserve1, reserve0);
+ amountInput = IERC20(input).balanceOf(address(pair)).sub(
+ reserveInput
+ );
+ amountOutput = UniswapV2Library.getAmountOut(
+ amountInput,
+ reserveInput,
+ reserveOutput
+ );
+ }
+ (uint amount0Out, uint amount1Out) = input == token0
+ ? (uint(0), amountOutput)
+ : (amountOutput, uint(0));
+ address to = i < path.length - 2
+ ? UniswapV2Library.pairFor(factory, output, path[i + 2])
+ : _to;
+ pair.swap(amount0Out, amount1Out, to, new bytes(0));
+ }
+ }
+
+ function swapExactTokensForTokensSupportingFeeOnTransferTokens(
+ uint amountIn,
+ uint amountOutMin,
+ address[] calldata path,
+ address to,
+ uint deadline
+ ) external virtual override ensure(deadline) {
+ TransferHelper.safeTransferFrom(
+ path[0],
+ msg.sender,
+ UniswapV2Library.pairFor(factory, path[0], path[1]),
+ amountIn
+ );
+ uint balanceBefore = IERC20(path[path.length - 1]).balanceOf(to);
+ _swapSupportingFeeOnTransferTokens(path, to);
+ require(
+ IERC20(path[path.length - 1]).balanceOf(to).sub(balanceBefore) >=
+ amountOutMin,
+ "UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT"
+ );
+ }
+
+ function swapExactETHForTokensSupportingFeeOnTransferTokens(
+ uint amountOutMin,
+ address[] calldata path,
+ address to,
+ uint deadline
+ ) external payable virtual override ensure(deadline) {
+ require(path[0] == WETH, "UniswapV2Router: INVALID_PATH");
+ uint amountIn = msg.value;
+ IWETH(WETH).deposit{value: amountIn}();
+ assert(
+ IWETH(WETH).transfer(
+ UniswapV2Library.pairFor(factory, path[0], path[1]),
+ amountIn
+ )
+ );
+ uint balanceBefore = IERC20(path[path.length - 1]).balanceOf(to);
+ _swapSupportingFeeOnTransferTokens(path, to);
+ require(
+ IERC20(path[path.length - 1]).balanceOf(to).sub(balanceBefore) >=
+ amountOutMin,
+ "UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT"
+ );
+ }
+
+ function swapExactTokensForETHSupportingFeeOnTransferTokens(
+ uint amountIn,
+ uint amountOutMin,
+ address[] calldata path,
+ address to,
+ uint deadline
+ ) external virtual override ensure(deadline) {
+ require(path[path.length - 1] == WETH, "UniswapV2Router: INVALID_PATH");
+ TransferHelper.safeTransferFrom(
+ path[0],
+ msg.sender,
+ UniswapV2Library.pairFor(factory, path[0], path[1]),
+ amountIn
+ );
+ _swapSupportingFeeOnTransferTokens(path, address(this));
+ uint amountOut = IERC20(WETH).balanceOf(address(this));
+ require(
+ amountOut >= amountOutMin,
+ "UniswapV2Router: INSUFFICIENT_OUTPUT_AMOUNT"
+ );
+ IWETH(WETH).withdraw(amountOut);
+ TransferHelper.safeTransferETH(to, amountOut);
+ }
+
+ // **** LIBRARY FUNCTIONS ****
+ function quote(
+ uint amountA,
+ uint reserveA,
+ uint reserveB
+ ) public pure virtual override returns (uint amountB) {
+ return UniswapV2Library.quote(amountA, reserveA, reserveB);
+ }
+
+ function getAmountOut(
+ uint amountIn,
+ uint reserveIn,
+ uint reserveOut
+ ) public pure virtual override returns (uint amountOut) {
+ return UniswapV2Library.getAmountOut(amountIn, reserveIn, reserveOut);
+ }
+
+ function getAmountIn(
+ uint amountOut,
+ uint reserveIn,
+ uint reserveOut
+ ) public pure virtual override returns (uint amountIn) {
+ return UniswapV2Library.getAmountIn(amountOut, reserveIn, reserveOut);
+ }
+
+ function getAmountsOut(
+ uint amountIn,
+ address[] memory path
+ ) public view virtual override returns (uint[] memory amounts) {
+ return UniswapV2Library.getAmountsOut(factory, amountIn, path);
+ }
+
+ function getAmountsIn(
+ uint amountOut,
+ address[] memory path
+ ) public view virtual override returns (uint[] memory amounts) {
+ return UniswapV2Library.getAmountsIn(factory, amountOut, path);
+ }
+}
diff --git a/hardhat.config.js b/hardhat.config.js
index a443bc8..d880a37 100644
--- a/hardhat.config.js
+++ b/hardhat.config.js
@@ -9,6 +9,24 @@ module.exports = {
},
solidity: {
compilers: [
+ {
+ version: "0.5.16",
+ settings: {
+ optimizer: {
+ enabled: true,
+ runs: 200,
+ },
+ },
+ },
+ {
+ version: "0.6.6",
+ settings: {
+ optimizer: {
+ enabled: true,
+ runs: 200,
+ },
+ },
+ },
{
version: "0.8.1",
settings: {
diff --git a/package-lock.json b/package-lock.json
index 836906c..20879fa 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,6 +10,8 @@
"license": "MIT",
"dependencies": {
"@openzeppelin/contracts": "^4.7.3",
+ "@uniswap/v2-core": "^1.0.1",
+ "@uniswap/v2-periphery": "^1.1.0-beta.0",
"markdown-link-check": "^3.11.0",
"prettier": "^2.8.7",
"prettier-plugin-solidity": "^1.1.3",
@@ -1227,6 +1229,42 @@
"@types/node": "*"
}
},
+ "node_modules/@uniswap/lib": {
+ "version": "1.1.1",
+ "resolved": "https://registry.npmjs.org/@uniswap/lib/-/lib-1.1.1.tgz",
+ "integrity": "sha512-2yK7sLpKIT91TiS5sewHtOa7YuM8IuBXVl4GZv2jZFys4D2sY7K5vZh6MqD25TPA95Od+0YzCVq6cTF2IKrOmg==",
+ "engines": {
+ "node": ">=10"
+ }
+ },
+ "node_modules/@uniswap/v2-core": {
+ "version": "1.0.1",
+ "resolved": "https://registry.npmjs.org/@uniswap/v2-core/-/v2-core-1.0.1.tgz",
+ "integrity": "sha512-MtybtkUPSyysqLY2U210NBDeCHX+ltHt3oADGdjqoThZaFRDKwM6k1Nb3F0A3hk5hwuQvytFWhrWHOEq6nVJ8Q==",
+ "engines": {
+ "node": ">=10"
+ }
+ },
+ "node_modules/@uniswap/v2-periphery": {
+ "version": "1.1.0-beta.0",
+ "resolved": "https://registry.npmjs.org/@uniswap/v2-periphery/-/v2-periphery-1.1.0-beta.0.tgz",
+ "integrity": "sha512-6dkwAMKza8nzqYiXEr2D86dgW3TTavUvCR0w2Tu33bAbM8Ah43LKAzH7oKKPRT5VJQaMi1jtkGs1E8JPor1n5g==",
+ "dependencies": {
+ "@uniswap/lib": "1.1.1",
+ "@uniswap/v2-core": "1.0.0"
+ },
+ "engines": {
+ "node": ">=10"
+ }
+ },
+ "node_modules/@uniswap/v2-periphery/node_modules/@uniswap/v2-core": {
+ "version": "1.0.0",
+ "resolved": "https://registry.npmjs.org/@uniswap/v2-core/-/v2-core-1.0.0.tgz",
+ "integrity": "sha512-BJiXrBGnN8mti7saW49MXwxDBRFiWemGetE58q8zgfnPPzQKq55ADltEILqOt6VFZ22kVeVKbF8gVd8aY3l7pA==",
+ "engines": {
+ "node": ">=10"
+ }
+ },
"node_modules/abort-controller": {
"version": "3.0.0",
"resolved": "https://registry.npmjs.org/abort-controller/-/abort-controller-3.0.0.tgz",
@@ -5242,6 +5280,32 @@
"@types/node": "*"
}
},
+ "@uniswap/lib": {
+ "version": "1.1.1",
+ "resolved": "https://registry.npmjs.org/@uniswap/lib/-/lib-1.1.1.tgz",
+ "integrity": "sha512-2yK7sLpKIT91TiS5sewHtOa7YuM8IuBXVl4GZv2jZFys4D2sY7K5vZh6MqD25TPA95Od+0YzCVq6cTF2IKrOmg=="
+ },
+ "@uniswap/v2-core": {
+ "version": "1.0.1",
+ "resolved": "https://registry.npmjs.org/@uniswap/v2-core/-/v2-core-1.0.1.tgz",
+ "integrity": "sha512-MtybtkUPSyysqLY2U210NBDeCHX+ltHt3oADGdjqoThZaFRDKwM6k1Nb3F0A3hk5hwuQvytFWhrWHOEq6nVJ8Q=="
+ },
+ "@uniswap/v2-periphery": {
+ "version": "1.1.0-beta.0",
+ "resolved": "https://registry.npmjs.org/@uniswap/v2-periphery/-/v2-periphery-1.1.0-beta.0.tgz",
+ "integrity": "sha512-6dkwAMKza8nzqYiXEr2D86dgW3TTavUvCR0w2Tu33bAbM8Ah43LKAzH7oKKPRT5VJQaMi1jtkGs1E8JPor1n5g==",
+ "requires": {
+ "@uniswap/lib": "1.1.1",
+ "@uniswap/v2-core": "1.0.0"
+ },
+ "dependencies": {
+ "@uniswap/v2-core": {
+ "version": "1.0.0",
+ "resolved": "https://registry.npmjs.org/@uniswap/v2-core/-/v2-core-1.0.0.tgz",
+ "integrity": "sha512-BJiXrBGnN8mti7saW49MXwxDBRFiWemGetE58q8zgfnPPzQKq55ADltEILqOt6VFZ22kVeVKbF8gVd8aY3l7pA=="
+ }
+ }
+ },
"abort-controller": {
"version": "3.0.0",
"resolved": "https://registry.npmjs.org/abort-controller/-/abort-controller-3.0.0.tgz",
diff --git a/package.json b/package.json
index 58777b9..5641b06 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,9 @@
"format-embedded-solidity": "prettier --write \"**/*.md\" --embedded-language-formatting=auto --plugin prettier-plugin-solidity --tab-width 4 --print-width 120 && prettier --write \"**/*.md\"",
"lint": "npm run lint-check-format && npm run lint-check-links",
"lint-check-format": "prettier --check .",
- "lint-check-links": "find . -name '*.md' -not -path './node_modules/*' -print0 | xargs -0 -n1 markdown-link-check"
+ "lint-check-links": "find . -name '*.md' -not -path './node_modules/*' -print0 | xargs -0 -n1 markdown-link-check",
+ "echidna-univ2": "echidna . --contract CryticUniswapV2PropertyTests --config ./contracts/AMM/UniswapV2/echidna-config.yaml",
+ "echidna-univ2-router": "echidna . --contract CryticUniswapV2RouterPropertyTests --config ./contracts/AMM/UniswapV2/echidna-config.yaml"
},
"repository": {
"type": "git",
@@ -24,6 +26,8 @@
"homepage": "https://github.com/crytic/properties#readme",
"dependencies": {
"@openzeppelin/contracts": "^4.7.3",
+ "@uniswap/v2-core": "^1.0.1",
+ "@uniswap/v2-periphery": "^1.1.0-beta.0",
"markdown-link-check": "^3.11.0",
"prettier": "^2.8.7",
"prettier-plugin-solidity": "^1.1.3",
diff --git a/remappings.txt b/remappings.txt
new file mode 100644
index 0000000..c40d8fe
--- /dev/null
+++ b/remappings.txt
@@ -0,0 +1,6 @@
+ERC4626/=lib/ERC4626/contracts/
+ds-test/=lib/forge-std/lib/ds-test/src/
+erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/
+forge-std/=lib/forge-std/src/
+@openzeppelin/=lib/openzeppelin-contracts/
+solmate/=lib/solmate/