@pollum-io/pegasys-protocol/artifacts/build-info/e76281af753b610737bc2069931c12b7.json

Contracts for the Pegasys Dex.

{
  "id": "e76281af753b610737bc2069931c12b7",
  "_format": "hh-sol-build-info-1",
  "solcVersion": "0.6.6",
  "solcLongVersion": "0.6.6+commit.6c089d02",
  "input": {
    "language": "Solidity",
    "sources": {
      "contracts/pegasys-periphery/PegasysRouter.sol": {
        "content": "pragma solidity =0.6.6;\n\nimport \"../pegasys-core/interfaces/IPegasysFactory.sol\";\nimport \"../pegasys-lib/libraries/TransferHelper.sol\";\n\nimport \"./interfaces/IPegasysRouter.sol\";\nimport \"./libraries/PegasysLibrary.sol\";\nimport \"./libraries/SafeMath.sol\";\nimport \"./interfaces/IERC20.sol\";\nimport \"./interfaces/IWSYS.sol\";\n\ncontract PegasysRouter is IPegasysRouter {\n    using SafeMath for uint256;\n\n    address public immutable override factory;\n    address public immutable override WSYS;\n\n    modifier ensure(uint256 deadline) {\n        require(deadline >= block.timestamp, \"PegasysRouter: EXPIRED\");\n        _;\n    }\n\n    constructor(address _factory, address _WSYS) public {\n        factory = _factory;\n        WSYS = _WSYS;\n    }\n\n    receive() external payable {\n        assert(msg.sender == WSYS); // only accept SYS via fallback from the WSYS contract\n    }\n\n    // **** ADD LIQUIDITY ****\n    function _addLiquidity(\n        address tokenA,\n        address tokenB,\n        uint256 amountADesired,\n        uint256 amountBDesired,\n        uint256 amountAMin,\n        uint256 amountBMin\n    ) internal virtual returns (uint256 amountA, uint256 amountB) {\n        // create the pair if it doesn't exist yet\n        if (IPegasysFactory(factory).getPair(tokenA, tokenB) == address(0)) {\n            IPegasysFactory(factory).createPair(tokenA, tokenB);\n        }\n        (uint256 reserveA, uint256 reserveB) = PegasysLibrary.getReserves(\n            factory,\n            tokenA,\n            tokenB\n        );\n        if (reserveA == 0 && reserveB == 0) {\n            (amountA, amountB) = (amountADesired, amountBDesired);\n        } else {\n            uint256 amountBOptimal = PegasysLibrary.quote(\n                amountADesired,\n                reserveA,\n                reserveB\n            );\n            if (amountBOptimal <= amountBDesired) {\n                require(\n                    amountBOptimal >= amountBMin,\n                    \"PegasysRouter: INSUFFICIENT_B_AMOUNT\"\n                );\n                (amountA, amountB) = (amountADesired, amountBOptimal);\n            } else {\n                uint256 amountAOptimal = PegasysLibrary.quote(\n                    amountBDesired,\n                    reserveB,\n                    reserveA\n                );\n                assert(amountAOptimal <= amountADesired);\n                require(\n                    amountAOptimal >= amountAMin,\n                    \"PegasysRouter: INSUFFICIENT_A_AMOUNT\"\n                );\n                (amountA, amountB) = (amountAOptimal, amountBDesired);\n            }\n        }\n    }\n\n    function addLiquidity(\n        address tokenA,\n        address tokenB,\n        uint256 amountADesired,\n        uint256 amountBDesired,\n        uint256 amountAMin,\n        uint256 amountBMin,\n        address to,\n        uint256 deadline\n    )\n        external\n        virtual\n        override\n        ensure(deadline)\n        returns (\n            uint256 amountA,\n            uint256 amountB,\n            uint256 liquidity\n        )\n    {\n        (amountA, amountB) = _addLiquidity(\n            tokenA,\n            tokenB,\n            amountADesired,\n            amountBDesired,\n            amountAMin,\n            amountBMin\n        );\n        address pair = PegasysLibrary.pairFor(factory, tokenA, tokenB);\n        TransferHelper.safeTransferFrom(tokenA, msg.sender, pair, amountA);\n        TransferHelper.safeTransferFrom(tokenB, msg.sender, pair, amountB);\n        liquidity = IPegasysPair(pair).mint(to);\n    }\n\n    function addLiquiditySYS(\n        address token,\n        uint256 amountTokenDesired,\n        uint256 amountTokenMin,\n        uint256 amountSYSMin,\n        address to,\n        uint256 deadline\n    )\n        external\n        payable\n        virtual\n        override\n        ensure(deadline)\n        returns (\n            uint256 amountToken,\n            uint256 amountSYS,\n            uint256 liquidity\n        )\n    {\n        (amountToken, amountSYS) = _addLiquidity(\n            token,\n            WSYS,\n            amountTokenDesired,\n            msg.value,\n            amountTokenMin,\n            amountSYSMin\n        );\n        address pair = PegasysLibrary.pairFor(factory, token, WSYS);\n        TransferHelper.safeTransferFrom(token, msg.sender, pair, amountToken);\n        IWSYS(WSYS).deposit{value: amountSYS}();\n        assert(IWSYS(WSYS).transfer(pair, amountSYS));\n        liquidity = IPegasysPair(pair).mint(to);\n        // refund dust SYS, if any\n        if (msg.value > amountSYS)\n            TransferHelper.safeTransferSYS(msg.sender, msg.value - amountSYS);\n    }\n\n    // **** REMOVE LIQUIDITY ****\n    function removeLiquidity(\n        address tokenA,\n        address tokenB,\n        uint256 liquidity,\n        uint256 amountAMin,\n        uint256 amountBMin,\n        address to,\n        uint256 deadline\n    )\n        public\n        virtual\n        override\n        ensure(deadline)\n        returns (uint256 amountA, uint256 amountB)\n    {\n        address pair = PegasysLibrary.pairFor(factory, tokenA, tokenB);\n        IPegasysPair(pair).transferFrom(msg.sender, pair, liquidity); // send liquidity to pair\n        (uint256 amount0, uint256 amount1) = IPegasysPair(pair).burn(to);\n        (address token0, ) = PegasysLibrary.sortTokens(tokenA, tokenB);\n        (amountA, amountB) = tokenA == token0\n            ? (amount0, amount1)\n            : (amount1, amount0);\n        require(amountA >= amountAMin, \"PegasysRouter: INSUFFICIENT_A_AMOUNT\");\n        require(amountB >= amountBMin, \"PegasysRouter: INSUFFICIENT_B_AMOUNT\");\n    }\n\n    function removeLiquiditySYS(\n        address token,\n        uint256 liquidity,\n        uint256 amountTokenMin,\n        uint256 amountSYSMin,\n        address to,\n        uint256 deadline\n    )\n        public\n        virtual\n        override\n        ensure(deadline)\n        returns (uint256 amountToken, uint256 amountSYS)\n    {\n        (amountToken, amountSYS) = removeLiquidity(\n            token,\n            WSYS,\n            liquidity,\n            amountTokenMin,\n            amountSYSMin,\n            address(this),\n            deadline\n        );\n        TransferHelper.safeTransfer(token, to, amountToken);\n        IWSYS(WSYS).withdraw(amountSYS);\n        TransferHelper.safeTransferSYS(to, amountSYS);\n    }\n\n    function removeLiquidityWithPermit(\n        address tokenA,\n        address tokenB,\n        uint256 liquidity,\n        uint256 amountAMin,\n        uint256 amountBMin,\n        address to,\n        uint256 deadline,\n        bool approveMax,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) external virtual override returns (uint256 amountA, uint256 amountB) {\n        address pair = PegasysLibrary.pairFor(factory, tokenA, tokenB);\n        uint256 value = approveMax ? uint256(-1) : liquidity;\n        IPegasysPair(pair).permit(\n            msg.sender,\n            address(this),\n            value,\n            deadline,\n            v,\n            r,\n            s\n        );\n        (amountA, amountB) = removeLiquidity(\n            tokenA,\n            tokenB,\n            liquidity,\n            amountAMin,\n            amountBMin,\n            to,\n            deadline\n        );\n    }\n\n    function removeLiquiditySYSWithPermit(\n        address token,\n        uint256 liquidity,\n        uint256 amountTokenMin,\n        uint256 amountSYSMin,\n        address to,\n        uint256 deadline,\n        bool approveMax,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    )\n        external\n        virtual\n        override\n        returns (uint256 amountToken, uint256 amountSYS)\n    {\n        address pair = PegasysLibrary.pairFor(factory, token, WSYS);\n        uint256 value = approveMax ? uint256(-1) : liquidity;\n        IPegasysPair(pair).permit(\n            msg.sender,\n            address(this),\n            value,\n            deadline,\n            v,\n            r,\n            s\n        );\n        (amountToken, amountSYS) = removeLiquiditySYS(\n            token,\n            liquidity,\n            amountTokenMin,\n            amountSYSMin,\n            to,\n            deadline\n        );\n    }\n\n    // **** REMOVE LIQUIDITY (supporting fee-on-transfer tokens) ****\n    function removeLiquiditySYSSupportingFeeOnTransferTokens(\n        address token,\n        uint256 liquidity,\n        uint256 amountTokenMin,\n        uint256 amountSYSMin,\n        address to,\n        uint256 deadline\n    ) public virtual override ensure(deadline) returns (uint256 amountSYS) {\n        (, amountSYS) = removeLiquidity(\n            token,\n            WSYS,\n            liquidity,\n            amountTokenMin,\n            amountSYSMin,\n            address(this),\n            deadline\n        );\n        TransferHelper.safeTransfer(\n            token,\n            to,\n            IERC20(token).balanceOf(address(this))\n        );\n        IWSYS(WSYS).withdraw(amountSYS);\n        TransferHelper.safeTransferSYS(to, amountSYS);\n    }\n\n    function removeLiquiditySYSWithPermitSupportingFeeOnTransferTokens(\n        address token,\n        uint256 liquidity,\n        uint256 amountTokenMin,\n        uint256 amountSYSMin,\n        address to,\n        uint256 deadline,\n        bool approveMax,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) external virtual override returns (uint256 amountSYS) {\n        address pair = PegasysLibrary.pairFor(factory, token, WSYS);\n        uint256 value = approveMax ? uint256(-1) : liquidity;\n        IPegasysPair(pair).permit(\n            msg.sender,\n            address(this),\n            value,\n            deadline,\n            v,\n            r,\n            s\n        );\n        amountSYS = removeLiquiditySYSSupportingFeeOnTransferTokens(\n            token,\n            liquidity,\n            amountTokenMin,\n            amountSYSMin,\n            to,\n            deadline\n        );\n    }\n\n    // **** SWAP ****\n    // requires the initial amount to have already been sent to the first pair\n    function _swap(\n        uint256[] memory amounts,\n        address[] memory path,\n        address _to\n    ) internal virtual {\n        for (uint256 i; i < path.length - 1; i++) {\n            (address input, address output) = (path[i], path[i + 1]);\n            (address token0, ) = PegasysLibrary.sortTokens(input, output);\n            uint256 amountOut = amounts[i + 1];\n            (uint256 amount0Out, uint256 amount1Out) = input == token0\n                ? (uint256(0), amountOut)\n                : (amountOut, uint256(0));\n            address to = i < path.length - 2\n                ? PegasysLibrary.pairFor(factory, output, path[i + 2])\n                : _to;\n            IPegasysPair(PegasysLibrary.pairFor(factory, input, output)).swap(\n                amount0Out,\n                amount1Out,\n                to,\n                new bytes(0)\n            );\n        }\n    }\n\n    function swapExactTokensForTokens(\n        uint256 amountIn,\n        uint256 amountOutMin,\n        address[] calldata path,\n        address to,\n        uint256 deadline\n    )\n        external\n        virtual\n        override\n        ensure(deadline)\n        returns (uint256[] memory amounts)\n    {\n        amounts = PegasysLibrary.getAmountsOut(factory, amountIn, path);\n        require(\n            amounts[amounts.length - 1] >= amountOutMin,\n            \"PegasysRouter: INSUFFICIENT_OUTPUT_AMOUNT\"\n        );\n        TransferHelper.safeTransferFrom(\n            path[0],\n            msg.sender,\n            PegasysLibrary.pairFor(factory, path[0], path[1]),\n            amounts[0]\n        );\n        _swap(amounts, path, to);\n    }\n\n    function swapTokensForExactTokens(\n        uint256 amountOut,\n        uint256 amountInMax,\n        address[] calldata path,\n        address to,\n        uint256 deadline\n    )\n        external\n        virtual\n        override\n        ensure(deadline)\n        returns (uint256[] memory amounts)\n    {\n        amounts = PegasysLibrary.getAmountsIn(factory, amountOut, path);\n        require(\n            amounts[0] <= amountInMax,\n            \"PegasysRouter: EXCESSIVE_INPUT_AMOUNT\"\n        );\n        TransferHelper.safeTransferFrom(\n            path[0],\n            msg.sender,\n            PegasysLibrary.pairFor(factory, path[0], path[1]),\n            amounts[0]\n        );\n        _swap(amounts, path, to);\n    }\n\n    function swapExactSYSForTokens(\n        uint256 amountOutMin,\n        address[] calldata path,\n        address to,\n        uint256 deadline\n    )\n        external\n        payable\n        virtual\n        override\n        ensure(deadline)\n        returns (uint256[] memory amounts)\n    {\n        require(path[0] == WSYS, \"PegasysRouter: INVALID_PATH\");\n        amounts = PegasysLibrary.getAmountsOut(factory, msg.value, path);\n        require(\n            amounts[amounts.length - 1] >= amountOutMin,\n            \"PegasysRouter: INSUFFICIENT_OUTPUT_AMOUNT\"\n        );\n        IWSYS(WSYS).deposit{value: amounts[0]}();\n        assert(\n            IWSYS(WSYS).transfer(\n                PegasysLibrary.pairFor(factory, path[0], path[1]),\n                amounts[0]\n            )\n        );\n        _swap(amounts, path, to);\n    }\n\n    function swapTokensForExactSYS(\n        uint256 amountOut,\n        uint256 amountInMax,\n        address[] calldata path,\n        address to,\n        uint256 deadline\n    )\n        external\n        virtual\n        override\n        ensure(deadline)\n        returns (uint256[] memory amounts)\n    {\n        require(path[path.length - 1] == WSYS, \"PegasysRouter: INVALID_PATH\");\n        amounts = PegasysLibrary.getAmountsIn(factory, amountOut, path);\n        require(\n            amounts[0] <= amountInMax,\n            \"PegasysRouter: EXCESSIVE_INPUT_AMOUNT\"\n        );\n        TransferHelper.safeTransferFrom(\n            path[0],\n            msg.sender,\n            PegasysLibrary.pairFor(factory, path[0], path[1]),\n            amounts[0]\n        );\n        _swap(amounts, path, address(this));\n        IWSYS(WSYS).withdraw(amounts[amounts.length - 1]);\n        TransferHelper.safeTransferSYS(to, amounts[amounts.length - 1]);\n    }\n\n    function swapExactTokensForSYS(\n        uint256 amountIn,\n        uint256 amountOutMin,\n        address[] calldata path,\n        address to,\n        uint256 deadline\n    )\n        external\n        virtual\n        override\n        ensure(deadline)\n        returns (uint256[] memory amounts)\n    {\n        require(path[path.length - 1] == WSYS, \"PegasysRouter: INVALID_PATH\");\n        amounts = PegasysLibrary.getAmountsOut(factory, amountIn, path);\n        require(\n            amounts[amounts.length - 1] >= amountOutMin,\n            \"PegasysRouter: INSUFFICIENT_OUTPUT_AMOUNT\"\n        );\n        TransferHelper.safeTransferFrom(\n            path[0],\n            msg.sender,\n            PegasysLibrary.pairFor(factory, path[0], path[1]),\n            amounts[0]\n        );\n        _swap(amounts, path, address(this));\n        IWSYS(WSYS).withdraw(amounts[amounts.length - 1]);\n        TransferHelper.safeTransferSYS(to, amounts[amounts.length - 1]);\n    }\n\n    function swapSYSForExactTokens(\n        uint256 amountOut,\n        address[] calldata path,\n        address to,\n        uint256 deadline\n    )\n        external\n        payable\n        virtual\n        override\n        ensure(deadline)\n        returns (uint256[] memory amounts)\n    {\n        require(path[0] == WSYS, \"PegasysRouter: INVALID_PATH\");\n        amounts = PegasysLibrary.getAmountsIn(factory, amountOut, path);\n        require(\n            amounts[0] <= msg.value,\n            \"PegasysRouter: EXCESSIVE_INPUT_AMOUNT\"\n        );\n        IWSYS(WSYS).deposit{value: amounts[0]}();\n        assert(\n            IWSYS(WSYS).transfer(\n                PegasysLibrary.pairFor(factory, path[0], path[1]),\n                amounts[0]\n            )\n        );\n        _swap(amounts, path, to);\n        // refund dust SYS, if any\n        if (msg.value > amounts[0])\n            TransferHelper.safeTransferSYS(msg.sender, msg.value - amounts[0]);\n    }\n\n    // **** SWAP (supporting fee-on-transfer tokens) ****\n    // requires the initial amount to have already been sent to the first pair\n    function _swapSupportingFeeOnTransferTokens(\n        address[] memory path,\n        address _to\n    ) internal virtual {\n        for (uint256 i; i < path.length - 1; i++) {\n            (address input, address output) = (path[i], path[i + 1]);\n            (address token0, ) = PegasysLibrary.sortTokens(input, output);\n            IPegasysPair pair = IPegasysPair(\n                PegasysLibrary.pairFor(factory, input, output)\n            );\n            uint256 amountInput;\n            uint256 amountOutput;\n            {\n                // scope to avoid stack too deep errors\n                (uint256 reserve0, uint256 reserve1, ) = pair.getReserves();\n                (uint256 reserveInput, uint256 reserveOutput) = input == token0\n                    ? (reserve0, reserve1)\n                    : (reserve1, reserve0);\n                amountInput = IERC20(input).balanceOf(address(pair)).sub(\n                    reserveInput\n                );\n                amountOutput = PegasysLibrary.getAmountOut(\n                    amountInput,\n                    reserveInput,\n                    reserveOutput\n                );\n            }\n            (uint256 amount0Out, uint256 amount1Out) = input == token0\n                ? (uint256(0), amountOutput)\n                : (amountOutput, uint256(0));\n            address to = i < path.length - 2\n                ? PegasysLibrary.pairFor(factory, output, path[i + 2])\n                : _to;\n            pair.swap(amount0Out, amount1Out, to, new bytes(0));\n        }\n    }\n\n    function swapExactTokensForTokensSupportingFeeOnTransferTokens(\n        uint256 amountIn,\n        uint256 amountOutMin,\n        address[] calldata path,\n        address to,\n        uint256 deadline\n    ) external virtual override ensure(deadline) {\n        TransferHelper.safeTransferFrom(\n            path[0],\n            msg.sender,\n            PegasysLibrary.pairFor(factory, path[0], path[1]),\n            amountIn\n        );\n        uint256 balanceBefore = IERC20(path[path.length - 1]).balanceOf(to);\n        _swapSupportingFeeOnTransferTokens(path, to);\n        require(\n            IERC20(path[path.length - 1]).balanceOf(to).sub(balanceBefore) >=\n                amountOutMin,\n            \"PegasysRouter: INSUFFICIENT_OUTPUT_AMOUNT\"\n        );\n    }\n\n    function swapExactSYSForTokensSupportingFeeOnTransferTokens(\n        uint256 amountOutMin,\n        address[] calldata path,\n        address to,\n        uint256 deadline\n    ) external payable virtual override ensure(deadline) {\n        require(path[0] == WSYS, \"PegasysRouter: INVALID_PATH\");\n        uint256 amountIn = msg.value;\n        IWSYS(WSYS).deposit{value: amountIn}();\n        assert(\n            IWSYS(WSYS).transfer(\n                PegasysLibrary.pairFor(factory, path[0], path[1]),\n                amountIn\n            )\n        );\n        uint256 balanceBefore = IERC20(path[path.length - 1]).balanceOf(to);\n        _swapSupportingFeeOnTransferTokens(path, to);\n        require(\n            IERC20(path[path.length - 1]).balanceOf(to).sub(balanceBefore) >=\n                amountOutMin,\n            \"PegasysRouter: INSUFFICIENT_OUTPUT_AMOUNT\"\n        );\n    }\n\n    function swapExactTokensForSYSSupportingFeeOnTransferTokens(\n        uint256 amountIn,\n        uint256 amountOutMin,\n        address[] calldata path,\n        address to,\n        uint256 deadline\n    ) external virtual override ensure(deadline) {\n        require(path[path.length - 1] == WSYS, \"PegasysRouter: INVALID_PATH\");\n        TransferHelper.safeTransferFrom(\n            path[0],\n            msg.sender,\n            PegasysLibrary.pairFor(factory, path[0], path[1]),\n            amountIn\n        );\n        _swapSupportingFeeOnTransferTokens(path, address(this));\n        uint256 amountOut = IERC20(WSYS).balanceOf(address(this));\n        require(\n            amountOut >= amountOutMin,\n            \"PegasysRouter: INSUFFICIENT_OUTPUT_AMOUNT\"\n        );\n        IWSYS(WSYS).withdraw(amountOut);\n        TransferHelper.safeTransferSYS(to, amountOut);\n    }\n\n    // **** LIBRARY FUNCTIONS ****\n    function quote(\n        uint256 amountA,\n        uint256 reserveA,\n        uint256 reserveB\n    ) public pure virtual override returns (uint256 amountB) {\n        return PegasysLibrary.quote(amountA, reserveA, reserveB);\n    }\n\n    function getAmountOut(\n        uint256 amountIn,\n        uint256 reserveIn,\n        uint256 reserveOut\n    ) public pure virtual override returns (uint256 amountOut) {\n        return PegasysLibrary.getAmountOut(amountIn, reserveIn, reserveOut);\n    }\n\n    function getAmountIn(\n        uint256 amountOut,\n        uint256 reserveIn,\n        uint256 reserveOut\n    ) public pure virtual override returns (uint256 amountIn) {\n        return PegasysLibrary.getAmountIn(amountOut, reserveIn, reserveOut);\n    }\n\n    function getAmountsOut(uint256 amountIn, address[] memory path)\n        public\n        view\n        virtual\n        override\n        returns (uint256[] memory amounts)\n    {\n        return PegasysLibrary.getAmountsOut(factory, amountIn, path);\n    }\n\n    function getAmountsIn(uint256 amountOut, address[] memory path)\n        public\n        view\n        virtual\n        override\n        returns (uint256[] memory amounts)\n    {\n        return PegasysLibrary.getAmountsIn(factory, amountOut, path);\n    }\n}\n"
      },
      "contracts/pegasys-core/interfaces/IPegasysFactory.sol": {
        "content": "// SPDX-License-Identifier: GNU\npragma solidity >=0.5.0;\n\ninterface IPegasysFactory {\n    event PairCreated(\n        address indexed token0,\n        address indexed token1,\n        address pair,\n        uint256\n    );\n\n    function feeTo() external view returns (address);\n\n    function feeToSetter() external view returns (address);\n\n    function getPair(address tokenA, address tokenB)\n        external\n        view\n        returns (address pair);\n\n    function allPairs(uint256) external view returns (address pair);\n\n    function allPairsLength() external view returns (uint256);\n\n    function createPair(address tokenA, address tokenB)\n        external\n        returns (address pair);\n\n    function setFeeTo(address) external;\n\n    function setFeeToSetter(address) external;\n}\n"
      },
      "contracts/pegasys-lib/libraries/TransferHelper.sol": {
        "content": "// SPDX-License-Identifier: GPL-3.0-or-later\n\npragma solidity >=0.6.0;\n\n// helper methods for interacting with ERC20 tokens and sending SYS that do not consistently return true/false\nlibrary TransferHelper {\n    function safeApprove(\n        address token,\n        address to,\n        uint256 value\n    ) internal {\n        // bytes4(keccak256(bytes('approve(address,uint256)')));\n        (bool success, bytes memory data) = token.call(\n            abi.encodeWithSelector(0x095ea7b3, to, value)\n        );\n        require(\n            success && (data.length == 0 || abi.decode(data, (bool))),\n            \"TransferHelper: APPROVE_FAILED\"\n        );\n    }\n\n    function safeTransfer(\n        address token,\n        address to,\n        uint256 value\n    ) internal {\n        // bytes4(keccak256(bytes('transfer(address,uint256)')));\n        (bool success, bytes memory data) = token.call(\n            abi.encodeWithSelector(0xa9059cbb, to, value)\n        );\n        require(\n            success && (data.length == 0 || abi.decode(data, (bool))),\n            \"TransferHelper: TRANSFER_FAILED\"\n        );\n    }\n\n    function safeTransferFrom(\n        address token,\n        address from,\n        address to,\n        uint256 value\n    ) internal {\n        // bytes4(keccak256(bytes('transferFrom(address,address,uint256)')));\n        (bool success, bytes memory data) = token.call(\n            abi.encodeWithSelector(0x23b872dd, from, to, value)\n        );\n        require(\n            success && (data.length == 0 || abi.decode(data, (bool))),\n            \"TransferHelper: TRANSFER_FROM_FAILED\"\n        );\n    }\n\n    function safeTransferSYS(address to, uint256 value) internal {\n        (bool success, ) = to.call{value: value}(new bytes(0));\n        require(success, \"TransferHelper: SYS_TRANSFER_FAILED\");\n    }\n}\n"
      },
      "contracts/pegasys-periphery/interfaces/IPegasysRouter.sol": {
        "content": "// SPDX-License-Identifier: GNU\npragma solidity >=0.6.2;\n\ninterface IPegasysRouter {\n    function factory() external pure returns (address);\n\n    function WSYS() external pure returns (address);\n\n    function addLiquidity(\n        address tokenA,\n        address tokenB,\n        uint256 amountADesired,\n        uint256 amountBDesired,\n        uint256 amountAMin,\n        uint256 amountBMin,\n        address to,\n        uint256 deadline\n    )\n        external\n        returns (\n            uint256 amountA,\n            uint256 amountB,\n            uint256 liquidity\n        );\n\n    function addLiquiditySYS(\n        address token,\n        uint256 amountTokenDesired,\n        uint256 amountTokenMin,\n        uint256 amountSYSMin,\n        address to,\n        uint256 deadline\n    )\n        external\n        payable\n        returns (\n            uint256 amountToken,\n            uint256 amountSYS,\n            uint256 liquidity\n        );\n\n    function removeLiquidity(\n        address tokenA,\n        address tokenB,\n        uint256 liquidity,\n        uint256 amountAMin,\n        uint256 amountBMin,\n        address to,\n        uint256 deadline\n    ) external returns (uint256 amountA, uint256 amountB);\n\n    function removeLiquiditySYS(\n        address token,\n        uint256 liquidity,\n        uint256 amountTokenMin,\n        uint256 amountSYSMin,\n        address to,\n        uint256 deadline\n    ) external returns (uint256 amountToken, uint256 amountSYS);\n\n    function removeLiquidityWithPermit(\n        address tokenA,\n        address tokenB,\n        uint256 liquidity,\n        uint256 amountAMin,\n        uint256 amountBMin,\n        address to,\n        uint256 deadline,\n        bool approveMax,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) external returns (uint256 amountA, uint256 amountB);\n\n    function removeLiquiditySYSWithPermit(\n        address token,\n        uint256 liquidity,\n        uint256 amountTokenMin,\n        uint256 amountSYSMin,\n        address to,\n        uint256 deadline,\n        bool approveMax,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) external returns (uint256 amountToken, uint256 amountSYS);\n\n    function swapExactTokensForTokens(\n        uint256 amountIn,\n        uint256 amountOutMin,\n        address[] calldata path,\n        address to,\n        uint256 deadline\n    ) external returns (uint256[] memory amounts);\n\n    function swapTokensForExactTokens(\n        uint256 amountOut,\n        uint256 amountInMax,\n        address[] calldata path,\n        address to,\n        uint256 deadline\n    ) external returns (uint256[] memory amounts);\n\n    function swapExactSYSForTokens(\n        uint256 amountOutMin,\n        address[] calldata path,\n        address to,\n        uint256 deadline\n    ) external payable returns (uint256[] memory amounts);\n\n    function swapTokensForExactSYS(\n        uint256 amountOut,\n        uint256 amountInMax,\n        address[] calldata path,\n        address to,\n        uint256 deadline\n    ) external returns (uint256[] memory amounts);\n\n    function swapExactTokensForSYS(\n        uint256 amountIn,\n        uint256 amountOutMin,\n        address[] calldata path,\n        address to,\n        uint256 deadline\n    ) external returns (uint256[] memory amounts);\n\n    function swapSYSForExactTokens(\n        uint256 amountOut,\n        address[] calldata path,\n        address to,\n        uint256 deadline\n    ) external payable returns (uint256[] memory amounts);\n\n    function quote(\n        uint256 amountA,\n        uint256 reserveA,\n        uint256 reserveB\n    ) external pure returns (uint256 amountB);\n\n    function getAmountOut(\n        uint256 amountIn,\n        uint256 reserveIn,\n        uint256 reserveOut\n    ) external pure returns (uint256 amountOut);\n\n    function getAmountIn(\n        uint256 amountOut,\n        uint256 reserveIn,\n        uint256 reserveOut\n    ) external pure returns (uint256 amountIn);\n\n    function getAmountsOut(uint256 amountIn, address[] calldata path)\n        external\n        view\n        returns (uint256[] memory amounts);\n\n    function getAmountsIn(uint256 amountOut, address[] calldata path)\n        external\n        view\n        returns (uint256[] memory amounts);\n\n    function removeLiquiditySYSSupportingFeeOnTransferTokens(\n        address token,\n        uint256 liquidity,\n        uint256 amountTokenMin,\n        uint256 amountSYSMin,\n        address to,\n        uint256 deadline\n    ) external returns (uint256 amountSYS);\n\n    function removeLiquiditySYSWithPermitSupportingFeeOnTransferTokens(\n        address token,\n        uint256 liquidity,\n        uint256 amountTokenMin,\n        uint256 amountSYSMin,\n        address to,\n        uint256 deadline,\n        bool approveMax,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) external returns (uint256 amountSYS);\n\n    function swapExactTokensForTokensSupportingFeeOnTransferTokens(\n        uint256 amountIn,\n        uint256 amountOutMin,\n        address[] calldata path,\n        address to,\n        uint256 deadline\n    ) external;\n\n    function swapExactSYSForTokensSupportingFeeOnTransferTokens(\n        uint256 amountOutMin,\n        address[] calldata path,\n        address to,\n        uint256 deadline\n    ) external payable;\n\n    function swapExactTokensForSYSSupportingFeeOnTransferTokens(\n        uint256 amountIn,\n        uint256 amountOutMin,\n        address[] calldata path,\n        address to,\n        uint256 deadline\n    ) external;\n}\n"
      },
      "contracts/pegasys-periphery/libraries/PegasysLibrary.sol": {
        "content": "// SPDX-License-Identifier: GNU\npragma solidity >=0.5.0;\n\nimport \"../../pegasys-core/interfaces/IPegasysFactory.sol\";\nimport \"../../pegasys-core/interfaces/IPegasysPair.sol\";\n\nimport \"./SafeMath.sol\";\n\nlibrary PegasysLibrary {\n    using SafeMath for uint256;\n\n    // returns sorted token addresses, used to handle return values from pairs sorted in this order\n    function sortTokens(address tokenA, address tokenB)\n        internal\n        pure\n        returns (address token0, address token1)\n    {\n        require(tokenA != tokenB, \"PegasysLibrary: IDENTICAL_ADDRESSES\");\n        (token0, token1) = tokenA < tokenB\n            ? (tokenA, tokenB)\n            : (tokenB, tokenA);\n        require(token0 != address(0), \"PegasysLibrary: ZERO_ADDRESS\");\n    }\n\n    // calculates the CREATE2 address for a pair without making any external calls\n    function pairFor(\n        address factory,\n        address tokenA,\n        address tokenB\n    ) internal pure returns (address pair) {\n        (address token0, address token1) = sortTokens(tokenA, tokenB);\n        pair = address(\n            uint256(\n                keccak256(\n                    abi.encodePacked(\n                        hex\"ff\",\n                        factory,\n                        keccak256(abi.encodePacked(token0, token1)),\n                        hex\"85c9b07c539b322c33da730d88df8396983c35a411da73d3d6c2278474890833\" // init code hash\n                    )\n                )\n            )\n        );\n    }\n\n    // fetches and sorts the reserves for a pair\n    function getReserves(\n        address factory,\n        address tokenA,\n        address tokenB\n    ) internal view returns (uint256 reserveA, uint256 reserveB) {\n        (address token0, ) = sortTokens(tokenA, tokenB);\n        (uint256 reserve0, uint256 reserve1, ) = IPegasysPair(\n            pairFor(factory, tokenA, tokenB)\n        ).getReserves();\n        (reserveA, reserveB) = tokenA == token0\n            ? (reserve0, reserve1)\n            : (reserve1, reserve0);\n    }\n\n    // given some amount of an asset and pair reserves, returns an equivalent amount of the other asset\n    function quote(\n        uint256 amountA,\n        uint256 reserveA,\n        uint256 reserveB\n    ) internal pure returns (uint256 amountB) {\n        require(amountA > 0, \"PegasysLibrary: INSUFFICIENT_AMOUNT\");\n        require(\n            reserveA > 0 && reserveB > 0,\n            \"PegasysLibrary: INSUFFICIENT_LIQUIDITY\"\n        );\n        amountB = amountA.mul(reserveB) / reserveA;\n    }\n\n    // given an input amount of an asset and pair reserves, returns the maximum output amount of the other asset\n    function getAmountOut(\n        uint256 amountIn,\n        uint256 reserveIn,\n        uint256 reserveOut\n    ) internal pure returns (uint256 amountOut) {\n        require(amountIn > 0, \"PegasysLibrary: INSUFFICIENT_INPUT_AMOUNT\");\n        require(\n            reserveIn > 0 && reserveOut > 0,\n            \"PegasysLibrary: INSUFFICIENT_LIQUIDITY\"\n        );\n        uint256 amountInWithFee = amountIn.mul(997);\n        uint256 numerator = amountInWithFee.mul(reserveOut);\n        uint256 denominator = reserveIn.mul(1000).add(amountInWithFee);\n        amountOut = numerator / denominator;\n    }\n\n    // given an output amount of an asset and pair reserves, returns a required input amount of the other asset\n    function getAmountIn(\n        uint256 amountOut,\n        uint256 reserveIn,\n        uint256 reserveOut\n    ) internal pure returns (uint256 amountIn) {\n        require(amountOut > 0, \"PegasysLibrary: INSUFFICIENT_OUTPUT_AMOUNT\");\n        require(\n            reserveIn > 0 && reserveOut > 0,\n            \"PegasysLibrary: INSUFFICIENT_LIQUIDITY\"\n        );\n        uint256 numerator = reserveIn.mul(amountOut).mul(1000);\n        uint256 denominator = reserveOut.sub(amountOut).mul(997);\n        amountIn = (numerator / denominator).add(1);\n    }\n\n    // performs chained getAmountOut calculations on any number of pairs\n    function getAmountsOut(\n        address factory,\n        uint256 amountIn,\n        address[] memory path\n    ) internal view returns (uint256[] memory amounts) {\n        require(path.length >= 2, \"PegasysLibrary: INVALID_PATH\");\n        amounts = new uint256[](path.length);\n        amounts[0] = amountIn;\n        for (uint256 i; i < path.length - 1; i++) {\n            (uint256 reserveIn, uint256 reserveOut) = getReserves(\n                factory,\n                path[i],\n                path[i + 1]\n            );\n            amounts[i + 1] = getAmountOut(amounts[i], reserveIn, reserveOut);\n        }\n    }\n\n    // performs chained getAmountIn calculations on any number of pairs\n    function getAmountsIn(\n        address factory,\n        uint256 amountOut,\n        address[] memory path\n    ) internal view returns (uint256[] memory amounts) {\n        require(path.length >= 2, \"PegasysLibrary: INVALID_PATH\");\n        amounts = new uint256[](path.length);\n        amounts[amounts.length - 1] = amountOut;\n        for (uint256 i = path.length - 1; i > 0; i--) {\n            (uint256 reserveIn, uint256 reserveOut) = getReserves(\n                factory,\n                path[i - 1],\n                path[i]\n            );\n            amounts[i - 1] = getAmountIn(amounts[i], reserveIn, reserveOut);\n        }\n    }\n}\n"
      },
      "contracts/pegasys-periphery/libraries/SafeMath.sol": {
        "content": "// SPDX-License-Identifier: GNU\npragma solidity >=0.6.6 <0.8.0;\n\n// a library for performing overflow-safe math, courtesy of DappHub (https://github.com/dapphub/ds-math)\n\nlibrary SafeMath {\n    function add(uint256 x, uint256 y) internal pure returns (uint256 z) {\n        require((z = x + y) >= x, \"ds-math-add-overflow\");\n    }\n\n    function sub(uint256 x, uint256 y) internal pure returns (uint256 z) {\n        require((z = x - y) <= x, \"ds-math-sub-underflow\");\n    }\n\n    function mul(uint256 x, uint256 y) internal pure returns (uint256 z) {\n        require(y == 0 || (z = x * y) / y == x, \"ds-math-mul-overflow\");\n    }\n\n    function div(uint256 a, uint256 b) internal pure returns (uint256 c) {\n        require(b > 0, \"SafeMath: Div by Zero\");\n        c = a / b;\n    }\n}\n"
      },
      "contracts/pegasys-periphery/interfaces/IERC20.sol": {
        "content": "// SPDX-License-Identifier: GNU\npragma solidity >=0.5.0;\n\ninterface IERC20 {\n    event Approval(\n        address indexed owner,\n        address indexed spender,\n        uint256 value\n    );\n    event Transfer(address indexed from, address indexed to, uint256 value);\n\n    function name() external view returns (string memory);\n\n    function symbol() external view returns (string memory);\n\n    function decimals() external view returns (uint8);\n\n    function totalSupply() external view returns (uint256);\n\n    function balanceOf(address owner) external view returns (uint256);\n\n    function allowance(address owner, address spender)\n        external\n        view\n        returns (uint256);\n\n    function approve(address spender, uint256 value) external returns (bool);\n\n    function transfer(address to, uint256 value) external returns (bool);\n\n    function transferFrom(\n        address from,\n        address to,\n        uint256 value\n    ) external returns (bool);\n}\n"
      },
      "contracts/pegasys-periphery/interfaces/IWSYS.sol": {
        "content": "// SPDX-License-Identifier: GNU\npragma solidity >=0.5.0;\n\ninterface IWSYS {\n    function deposit() external payable;\n\n    function transfer(address to, uint256 value) external returns (bool);\n\n    function balanceOf(address owner) external view returns (uint256);\n\n    function withdraw(uint256) external;\n}\n"
      },
      "contracts/pegasys-core/interfaces/IPegasysPair.sol": {
        "content": "// SPDX-License-Identifier: GNU\npragma solidity >=0.5.0;\n\ninterface IPegasysPair {\n    event Approval(\n        address indexed owner,\n        address indexed spender,\n        uint256 value\n    );\n    event Transfer(address indexed from, address indexed to, uint256 value);\n\n    function name() external pure returns (string memory);\n\n    function symbol() external pure returns (string memory);\n\n    function decimals() external pure returns (uint8);\n\n    function totalSupply() external view returns (uint256);\n\n    function balanceOf(address owner) external view returns (uint256);\n\n    function allowance(address owner, address spender)\n        external\n        view\n        returns (uint256);\n\n    function approve(address spender, uint256 value) external returns (bool);\n\n    function transfer(address to, uint256 value) external returns (bool);\n\n    function transferFrom(\n        address from,\n        address to,\n        uint256 value\n    ) external returns (bool);\n\n    function DOMAIN_SEPARATOR() external view returns (bytes32);\n\n    function PERMIT_TYPEHASH() external pure returns (bytes32);\n\n    function nonces(address owner) external view returns (uint256);\n\n    function permit(\n        address owner,\n        address spender,\n        uint256 value,\n        uint256 deadline,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) external;\n\n    event Mint(address indexed sender, uint256 amount0, uint256 amount1);\n    event Burn(\n        address indexed sender,\n        uint256 amount0,\n        uint256 amount1,\n        address indexed to\n    );\n    event Swap(\n        address indexed sender,\n        uint256 amount0In,\n        uint256 amount1In,\n        uint256 amount0Out,\n        uint256 amount1Out,\n        address indexed to\n    );\n    event Sync(uint112 reserve0, uint112 reserve1);\n\n    function MINIMUM_LIQUIDITY() external pure returns (uint256);\n\n    function factory() external view returns (address);\n\n    function token0() external view returns (address);\n\n    function token1() external view returns (address);\n\n    function getReserves()\n        external\n        view\n        returns (\n            uint112 reserve0,\n            uint112 reserve1,\n            uint32 blockTimestampLast\n        );\n\n    function price0CumulativeLast() external view returns (uint256);\n\n    function price1CumulativeLast() external view returns (uint256);\n\n    function kLast() external view returns (uint256);\n\n    function mint(address to) external returns (uint256 liquidity);\n\n    function burn(address to)\n        external\n        returns (uint256 amount0, uint256 amount1);\n\n    function swap(\n        uint256 amount0Out,\n        uint256 amount1Out,\n        address to,\n        bytes calldata data\n    ) external;\n\n    function skim(address to) external;\n\n    function sync() external;\n\n    function initialize(address, address) external;\n}\n"
      },
      "contracts/pegasys-periphery/test/ERC20.sol": {
        "content": "pragma solidity =0.6.6;\n\nimport \"../libraries/SafeMath.sol\";\n\ncontract ERC20 {\n    using SafeMath for uint256;\n\n    string public constant name = \"Test Token\";\n    string public constant symbol = \"TT\";\n    uint8 public constant decimals = 18;\n    uint256 public totalSupply;\n    mapping(address => uint256) public balanceOf;\n    mapping(address => mapping(address => uint256)) public allowance;\n\n    bytes32 public DOMAIN_SEPARATOR;\n    // keccak256(\"Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)\");\n    bytes32 public constant PERMIT_TYPEHASH =\n        0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;\n    mapping(address => uint256) public nonces;\n\n    event Approval(\n        address indexed owner,\n        address indexed spender,\n        uint256 value\n    );\n    event Transfer(address indexed from, address indexed to, uint256 value);\n\n    constructor(uint256 _totalSupply) public {\n        uint256 chainId;\n        assembly {\n            chainId := chainid()\n        }\n        DOMAIN_SEPARATOR = keccak256(\n            abi.encode(\n                keccak256(\n                    \"EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)\"\n                ),\n                keccak256(bytes(name)),\n                keccak256(bytes(\"1\")),\n                chainId,\n                address(this)\n            )\n        );\n        _mint(msg.sender, _totalSupply);\n    }\n\n    function _mint(address to, uint256 value) internal {\n        totalSupply = totalSupply.add(value);\n        balanceOf[to] = balanceOf[to].add(value);\n        emit Transfer(address(0), to, value);\n    }\n\n    function _burn(address from, uint256 value) internal {\n        balanceOf[from] = balanceOf[from].sub(value);\n        totalSupply = totalSupply.sub(value);\n        emit Transfer(from, address(0), value);\n    }\n\n    function _approve(\n        address owner,\n        address spender,\n        uint256 value\n    ) private {\n        allowance[owner][spender] = value;\n        emit Approval(owner, spender, value);\n    }\n\n    function _transfer(\n        address from,\n        address to,\n        uint256 value\n    ) private {\n        balanceOf[from] = balanceOf[from].sub(value);\n        balanceOf[to] = balanceOf[to].add(value);\n        emit Transfer(from, to, value);\n    }\n\n    function approve(address spender, uint256 value) external returns (bool) {\n        _approve(msg.sender, spender, value);\n        return true;\n    }\n\n    function transfer(address to, uint256 value) external returns (bool) {\n        _transfer(msg.sender, to, value);\n        return true;\n    }\n\n    function transferFrom(\n        address from,\n        address to,\n        uint256 value\n    ) external returns (bool) {\n        if (allowance[from][msg.sender] != uint256(-1)) {\n            allowance[from][msg.sender] = allowance[from][msg.sender].sub(\n                value\n            );\n        }\n        _transfer(from, to, value);\n        return true;\n    }\n\n    function permit(\n        address owner,\n        address spender,\n        uint256 value,\n        uint256 deadline,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) external {\n        require(deadline >= block.timestamp, \"EXPIRED\");\n        bytes32 digest = keccak256(\n            abi.encodePacked(\n                \"\\x19\\x01\",\n                DOMAIN_SEPARATOR,\n                keccak256(\n                    abi.encode(\n                        PERMIT_TYPEHASH,\n                        owner,\n                        spender,\n                        value,\n                        nonces[owner]++,\n                        deadline\n                    )\n                )\n            )\n        );\n        address recoveredAddress = ecrecover(digest, v, r, s);\n        require(\n            recoveredAddress != address(0) && recoveredAddress == owner,\n            \"INVALID_SIGNATURE\"\n        );\n        _approve(owner, spender, value);\n    }\n}\n"
      },
      "contracts/pegasys-periphery/test/DeflatingERC20.sol": {
        "content": "pragma solidity =0.6.6;\n\nimport \"../libraries/SafeMath.sol\";\n\ncontract DeflatingERC20 {\n    using SafeMath for uint256;\n\n    string public constant name = \"Deflating Test Token\";\n    string public constant symbol = \"DTT\";\n    uint8 public constant decimals = 18;\n    uint256 public totalSupply;\n    mapping(address => uint256) public balanceOf;\n    mapping(address => mapping(address => uint256)) public allowance;\n\n    bytes32 public DOMAIN_SEPARATOR;\n    // keccak256(\"Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)\");\n    bytes32 public constant PERMIT_TYPEHASH =\n        0x6e71edae12b1b97f4d1f60370fef10105fa2faae0126114a169c64845d6126c9;\n    mapping(address => uint256) public nonces;\n\n    event Approval(\n        address indexed owner,\n        address indexed spender,\n        uint256 value\n    );\n    event Transfer(address indexed from, address indexed to, uint256 value);\n\n    constructor(uint256 _totalSupply) public {\n        uint256 chainId;\n        assembly {\n            chainId := chainid()\n        }\n        DOMAIN_SEPARATOR = keccak256(\n            abi.encode(\n                keccak256(\n                    \"EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)\"\n                ),\n                keccak256(bytes(name)),\n                keccak256(bytes(\"1\")),\n                chainId,\n                address(this)\n            )\n        );\n        _mint(msg.sender, _totalSupply);\n    }\n\n    function _mint(address to, uint256 value) internal {\n        totalSupply = totalSupply.add(value);\n        balanceOf[to] = balanceOf[to].add(value);\n        emit Transfer(address(0), to, value);\n    }\n\n    function _burn(address from, uint256 value) internal {\n        balanceOf[from] = balanceOf[from].sub(value);\n        totalSupply = totalSupply.sub(value);\n        emit Transfer(from, address(0), value);\n    }\n\n    function _approve(\n        address owner,\n        address spender,\n        uint256 value\n    ) private {\n        allowance[owner][spender] = value;\n        emit Approval(owner, spender, value);\n    }\n\n    function _transfer(\n        address from,\n        address to,\n        uint256 value\n    ) private {\n        uint256 burnAmount = value / 100;\n        _burn(from, burnAmount);\n        uint256 transferAmount = value.sub(burnAmount);\n        balanceOf[from] = balanceOf[from].sub(transferAmount);\n        balanceOf[to] = balanceOf[to].add(transferAmount);\n        emit Transfer(from, to, transferAmount);\n    }\n\n    function approve(address spender, uint256 value) external returns (bool) {\n        _approve(msg.sender, spender, value);\n        return true;\n    }\n\n    function transfer(address to, uint256 value) external returns (bool) {\n        _transfer(msg.sender, to, value);\n        return true;\n    }\n\n    function transferFrom(\n        address from,\n        address to,\n        uint256 value\n    ) external returns (bool) {\n        if (allowance[from][msg.sender] != uint256(-1)) {\n            allowance[from][msg.sender] = allowance[from][msg.sender].sub(\n                value\n            );\n        }\n        _transfer(from, to, value);\n        return true;\n    }\n\n    function permit(\n        address owner,\n        address spender,\n        uint256 value,\n        uint256 deadline,\n        uint8 v,\n        bytes32 r,\n        bytes32 s\n    ) external {\n        require(deadline >= block.timestamp, \"EXPIRED\");\n        bytes32 digest = kecc