{
    "schemaVersion": "2.0.0",
    "contractName": "ShellBridge",
    "compilerOutput": {
        "abi": [
            {
                "anonymous": false,
                "inputs": [
                    {
                        "indexed": false,
                        "internalType": "address",
                        "name": "inputToken",
                        "type": "address"
                    },
                    {
                        "indexed": false,
                        "internalType": "address",
                        "name": "outputToken",
                        "type": "address"
                    },
                    {
                        "indexed": false,
                        "internalType": "uint256",
                        "name": "inputTokenAmount",
                        "type": "uint256"
                    },
                    {
                        "indexed": false,
                        "internalType": "uint256",
                        "name": "outputTokenAmount",
                        "type": "uint256"
                    },
                    {
                        "indexed": false,
                        "internalType": "address",
                        "name": "from",
                        "type": "address"
                    },
                    {
                        "indexed": false,
                        "internalType": "address",
                        "name": "to",
                        "type": "address"
                    }
                ],
                "name": "ERC20BridgeTransfer",
                "type": "event"
            },
            {
                "constant": false,
                "inputs": [
                    {
                        "internalType": "address",
                        "name": "toTokenAddress",
                        "type": "address"
                    },
                    {
                        "internalType": "address",
                        "name": "from",
                        "type": "address"
                    },
                    {
                        "internalType": "address",
                        "name": "to",
                        "type": "address"
                    },
                    {
                        "internalType": "uint256",
                        "name": "amount",
                        "type": "uint256"
                    },
                    {
                        "internalType": "bytes",
                        "name": "bridgeData",
                        "type": "bytes"
                    }
                ],
                "name": "bridgeTransferFrom",
                "outputs": [
                    {
                        "internalType": "bytes4",
                        "name": "success",
                        "type": "bytes4"
                    }
                ],
                "payable": false,
                "stateMutability": "nonpayable",
                "type": "function"
            },
            {
                "constant": true,
                "inputs": [
                    {
                        "internalType": "bytes32",
                        "name": "",
                        "type": "bytes32"
                    },
                    {
                        "internalType": "bytes",
                        "name": "",
                        "type": "bytes"
                    }
                ],
                "name": "isValidSignature",
                "outputs": [
                    {
                        "internalType": "bytes4",
                        "name": "magicValue",
                        "type": "bytes4"
                    }
                ],
                "payable": false,
                "stateMutability": "view",
                "type": "function"
            }
        ],
        "devdoc": {
            "methods": {
                "bridgeTransferFrom(address,address,address,uint256,bytes)": {
                    "details": "Swaps specified tokens against the Shell contract",
                    "params": {
                        "amount": "Minimum amount of `toTokenAddress` tokens to buy.",
                        "bridgeData": "The abi-encoded \"from\" token address.",
                        "from": "The maker (this contract).",
                        "to": "The recipient of the bought tokens.",
                        "toTokenAddress": "The token to give to `to`."
                    },
                    "return": "success The magic bytes if successful."
                },
                "isValidSignature(bytes32,bytes)": {
                    "details": "`SignatureType.Wallet` callback, so that this bridge can be the maker      and sign for itself in orders. Always succeeds.",
                    "return": "magicValue Magic success bytes, always."
                }
            }
        },
        "evm": {
            "bytecode": {
                "linkReferences": {},
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                "opcodes": "PUSH1 0x80 PUSH1 0x40 MSTORE CALLVALUE DUP1 ISZERO PUSH2 0x10 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST POP PUSH2 0x948 DUP1 PUSH2 0x20 PUSH1 0x0 CODECOPY PUSH1 0x0 RETURN INVALID PUSH1 0x80 PUSH1 0x40 MSTORE CALLVALUE DUP1 ISZERO PUSH2 0x10 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST POP PUSH1 0x4 CALLDATASIZE LT PUSH2 0x36 JUMPI PUSH1 0x0 CALLDATALOAD PUSH1 0xE0 SHR DUP1 PUSH4 0x1626BA7E EQ PUSH2 0x3B JUMPI DUP1 PUSH4 0xC2DF82E6 EQ PUSH2 0x64 JUMPI JUMPDEST PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0x4E PUSH2 0x49 CALLDATASIZE PUSH1 0x4 PUSH2 0x703 JUMP JUMPDEST PUSH2 0x77 JUMP JUMPDEST PUSH1 0x40 MLOAD PUSH2 0x5B SWAP2 SWAP1 PUSH2 0x891 JUMP JUMPDEST PUSH1 0x40 MLOAD DUP1 SWAP2 SUB SWAP1 RETURN JUMPDEST PUSH2 0x4E PUSH2 0x72 CALLDATASIZE PUSH1 0x4 PUSH2 0x680 JUMP JUMPDEST PUSH2 0x9F JUMP JUMPDEST PUSH32 0xB067138100000000000000000000000000000000000000000000000000000000 SWAP4 SWAP3 POP POP POP JUMP JUMPDEST PUSH1 0x0 DUP1 DUP1 PUSH2 0xAF DUP5 DUP7 ADD DUP7 PUSH2 0x648 JUMP JUMPDEST SWAP2 POP SWAP2 POP PUSH1 0x0 DUP3 PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF AND PUSH4 0x70A08231 ADDRESS PUSH1 0x40 MLOAD DUP3 PUSH4 0xFFFFFFFF AND PUSH1 0xE0 SHL DUP2 MSTORE PUSH1 0x4 ADD PUSH2 0xEE SWAP2 SWAP1 PUSH2 0x79E JUMP JUMPDEST PUSH1 0x20 PUSH1 0x40 MLOAD DUP1 DUP4 SUB DUP2 DUP7 DUP1 EXTCODESIZE ISZERO DUP1 ISZERO PUSH2 0x106 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST POP GAS STATICCALL ISZERO DUP1 ISZERO PUSH2 0x11A JUMPI RETURNDATASIZE PUSH1 0x0 DUP1 RETURNDATACOPY RETURNDATASIZE PUSH1 0x0 REVERT JUMPDEST POP POP POP POP PUSH1 0x40 MLOAD RETURNDATASIZE PUSH1 0x1F NOT PUSH1 0x1F DUP3 ADD AND DUP3 ADD DUP1 PUSH1 0x40 MSTORE POP PUSH2 0x13E SWAP2 SWAP1 DUP2 ADD SWAP1 PUSH2 0x74D JUMP JUMPDEST SWAP1 POP PUSH2 0x14B DUP4 DUP4 DUP4 PUSH2 0x27B JUMP JUMPDEST PUSH1 0x40 MLOAD PUSH32 0xB2583C800000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH1 0x0 SWAP1 PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF DUP5 AND SWAP1 PUSH4 0xB2583C8 SWAP1 PUSH2 0x1AB SWAP1 DUP8 SWAP1 DUP16 SWAP1 DUP8 SWAP1 DUP15 SWAP1 PUSH1 0x1 TIMESTAMP ADD SWAP1 PUSH1 0x4 ADD PUSH2 0x82D JUMP JUMPDEST PUSH1 0x20 PUSH1 0x40 MLOAD DUP1 DUP4 SUB DUP2 PUSH1 0x0 DUP8 DUP1 EXTCODESIZE ISZERO DUP1 ISZERO PUSH2 0x1C5 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST POP GAS CALL ISZERO DUP1 ISZERO PUSH2 0x1D9 JUMPI RETURNDATASIZE PUSH1 0x0 DUP1 RETURNDATACOPY RETURNDATASIZE PUSH1 0x0 REVERT JUMPDEST POP POP POP POP PUSH1 0x40 MLOAD RETURNDATASIZE PUSH1 0x1F NOT PUSH1 0x1F DUP3 ADD AND DUP3 ADD DUP1 PUSH1 0x40 MSTORE POP PUSH2 0x1FD SWAP2 SWAP1 DUP2 ADD SWAP1 PUSH2 0x74D JUMP JUMPDEST SWAP1 POP PUSH2 0x20A DUP12 DUP11 DUP4 PUSH2 0x357 JUMP JUMPDEST PUSH32 0x349FC08071558D8E3AA92DEC9396E4E9F2DFECD6BB9065759D1932E7DA43B8A9 DUP5 DUP13 DUP5 DUP5 DUP15 DUP15 PUSH1 0x40 MLOAD PUSH2 0x243 SWAP7 SWAP6 SWAP5 SWAP4 SWAP3 SWAP2 SWAP1 PUSH2 0x7E6 JUMP JUMPDEST PUSH1 0x40 MLOAD DUP1 SWAP2 SUB SWAP1 LOG1 POP PUSH32 0xDC1600F300000000000000000000000000000000000000000000000000000000 SWAP11 SWAP10 POP POP POP POP POP POP POP POP POP POP JUMP JUMPDEST PUSH1 0x40 MLOAD PUSH32 0xDD62ED3E00000000000000000000000000000000000000000000000000000000 DUP2 MSTORE DUP2 SWAP1 PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF DUP6 AND SWAP1 PUSH4 0xDD62ED3E SWAP1 PUSH2 0x2D1 SWAP1 ADDRESS SWAP1 DUP8 SWAP1 PUSH1 0x4 ADD PUSH2 0x7BF JUMP JUMPDEST PUSH1 0x20 PUSH1 0x40 MLOAD DUP1 DUP4 SUB DUP2 DUP7 DUP1 EXTCODESIZE ISZERO DUP1 ISZERO PUSH2 0x2E9 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST POP GAS STATICCALL ISZERO DUP1 ISZERO PUSH2 0x2FD JUMPI RETURNDATASIZE PUSH1 0x0 DUP1 RETURNDATACOPY RETURNDATASIZE PUSH1 0x0 REVERT JUMPDEST POP POP POP POP PUSH1 0x40 MLOAD RETURNDATASIZE PUSH1 0x1F NOT PUSH1 0x1F DUP3 ADD AND DUP3 ADD DUP1 PUSH1 0x40 MSTORE POP PUSH2 0x321 SWAP2 SWAP1 DUP2 ADD SWAP1 PUSH2 0x74D JUMP JUMPDEST LT ISZERO PUSH2 0x352 JUMPI PUSH2 0x352 DUP4 DUP4 PUSH32 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF PUSH2 0x41E JUMP JUMPDEST POP POP POP JUMP JUMPDEST PUSH1 0x40 MLOAD PUSH1 0x60 SWAP1 PUSH32 0xA9059CBB00000000000000000000000000000000000000000000000000000000 SWAP1 PUSH2 0x38F SWAP1 DUP6 SWAP1 DUP6 SWAP1 PUSH1 0x24 ADD PUSH2 0x86B JUMP JUMPDEST PUSH1 0x40 DUP1 MLOAD PUSH32 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE0 DUP2 DUP5 SUB ADD DUP2 MSTORE SWAP2 SWAP1 MSTORE PUSH1 0x20 DUP2 ADD DUP1 MLOAD PUSH28 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF AND PUSH32 0xFFFFFFFF00000000000000000000000000000000000000000000000000000000 SWAP1 SWAP4 AND SWAP3 SWAP1 SWAP3 OR SWAP1 SWAP2 MSTORE SWAP1 POP PUSH2 0x418 DUP5 DUP3 PUSH2 0x456 JUMP JUMPDEST POP POP POP POP JUMP JUMPDEST PUSH1 0x40 MLOAD PUSH1 0x60 SWAP1 PUSH32 0x95EA7B300000000000000000000000000000000000000000000000000000000 SWAP1 PUSH2 0x38F SWAP1 DUP6 SWAP1 DUP6 SWAP1 PUSH1 0x24 ADD PUSH2 0x86B JUMP JUMPDEST PUSH1 0x0 PUSH1 0x60 DUP4 PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF AND DUP4 PUSH1 0x40 MLOAD PUSH2 0x47F SWAP2 SWAP1 PUSH2 0x765 JUMP JUMPDEST PUSH1 0x0 PUSH1 0x40 MLOAD DUP1 DUP4 SUB DUP2 PUSH1 0x0 DUP7 GAS CALL SWAP2 POP POP RETURNDATASIZE DUP1 PUSH1 0x0 DUP2 EQ PUSH2 0x4BC JUMPI PUSH1 0x40 MLOAD SWAP2 POP PUSH1 0x1F NOT PUSH1 0x3F RETURNDATASIZE ADD AND DUP3 ADD PUSH1 0x40 MSTORE RETURNDATASIZE DUP3 MSTORE RETURNDATASIZE PUSH1 0x0 PUSH1 0x20 DUP5 ADD RETURNDATACOPY PUSH2 0x4C1 JUMP JUMPDEST PUSH1 0x60 SWAP2 POP JUMPDEST POP SWAP2 POP SWAP2 POP DUP2 ISZERO PUSH2 0x505 JUMPI DUP1 MLOAD PUSH2 0x4D9 JUMPI POP POP PUSH2 0x50E JUMP JUMPDEST DUP1 MLOAD PUSH1 0x20 EQ ISZERO PUSH2 0x505 JUMPI PUSH1 0x0 PUSH2 0x4F0 DUP3 PUSH1 0x0 PUSH2 0x512 JUMP JUMPDEST SWAP1 POP DUP1 PUSH1 0x1 EQ ISZERO PUSH2 0x503 JUMPI POP POP POP PUSH2 0x50E JUMP JUMPDEST POP JUMPDEST PUSH2 0x418 DUP2 PUSH2 0x525 JUMP JUMPDEST POP POP JUMP JUMPDEST PUSH1 0x0 PUSH2 0x51E DUP4 DUP4 PUSH2 0x52D JUMP JUMPDEST SWAP4 SWAP3 POP POP POP JUMP JUMPDEST DUP1 MLOAD PUSH1 0x20 DUP3 ADD REVERT JUMPDEST PUSH1 0x0 DUP2 PUSH1 0x20 ADD DUP4 MLOAD LT ISZERO PUSH2 0x553 JUMPI PUSH2 0x553 PUSH2 0x54E PUSH1 0x5 DUP6 MLOAD DUP6 PUSH1 0x20 ADD PUSH2 0x55C JUMP JUMPDEST PUSH2 0x525 JUMP JUMPDEST POP ADD PUSH1 0x20 ADD MLOAD SWAP1 JUMP JUMPDEST PUSH1 0x60 PUSH4 0x28006595 PUSH1 0xE0 SHL DUP5 DUP5 DUP5 PUSH1 0x40 MLOAD PUSH1 0x24 ADD PUSH2 0x57B SWAP4 SWAP3 SWAP2 SWAP1 PUSH2 0x8BE JUMP JUMPDEST PUSH1 0x40 DUP1 MLOAD PUSH32 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE0 DUP2 DUP5 SUB ADD DUP2 MSTORE SWAP2 SWAP1 MSTORE PUSH1 0x20 DUP2 ADD DUP1 MLOAD PUSH28 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF AND PUSH32 0xFFFFFFFF00000000000000000000000000000000000000000000000000000000 SWAP1 SWAP4 AND SWAP3 SWAP1 SWAP3 OR SWAP1 SWAP2 MSTORE SWAP1 POP SWAP4 SWAP3 POP POP POP JUMP JUMPDEST PUSH1 0x0 DUP1 DUP4 PUSH1 0x1F DUP5 ADD SLT PUSH2 0x612 JUMPI DUP2 DUP3 REVERT JUMPDEST POP DUP2 CALLDATALOAD PUSH8 0xFFFFFFFFFFFFFFFF DUP2 GT ISZERO PUSH2 0x629 JUMPI DUP2 DUP3 REVERT JUMPDEST PUSH1 0x20 DUP4 ADD SWAP2 POP DUP4 PUSH1 0x20 DUP3 DUP6 ADD ADD GT ISZERO PUSH2 0x641 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST SWAP3 POP SWAP3 SWAP1 POP JUMP JUMPDEST PUSH1 0x0 DUP1 PUSH1 0x40 DUP4 DUP6 SUB SLT ISZERO PUSH2 0x65A JUMPI DUP2 DUP3 REVERT JUMPDEST DUP3 CALLDATALOAD PUSH2 0x665 DUP2 PUSH2 0x8E0 JUMP JUMPDEST SWAP2 POP PUSH1 0x20 DUP4 ADD CALLDATALOAD PUSH2 0x675 DUP2 PUSH2 0x8E0 JUMP JUMPDEST DUP1 SWAP2 POP POP SWAP3 POP SWAP3 SWAP1 POP JUMP JUMPDEST PUSH1 0x0 DUP1 PUSH1 0x0 DUP1 PUSH1 0x0 DUP1 PUSH1 0xA0 DUP8 DUP10 SUB SLT ISZERO PUSH2 0x698 JUMPI DUP2 DUP3 REVERT JUMPDEST DUP7 CALLDATALOAD PUSH2 0x6A3 DUP2 PUSH2 0x8E0 JUMP JUMPDEST SWAP6 POP PUSH1 0x20 DUP8 ADD CALLDATALOAD PUSH2 0x6B3 DUP2 PUSH2 0x8E0 JUMP JUMPDEST SWAP5 POP PUSH1 0x40 DUP8 ADD CALLDATALOAD PUSH2 0x6C3 DUP2 PUSH2 0x8E0 JUMP JUMPDEST SWAP4 POP PUSH1 0x60 DUP8 ADD CALLDATALOAD SWAP3 POP PUSH1 0x80 DUP8 ADD CALLDATALOAD PUSH8 0xFFFFFFFFFFFFFFFF DUP2 GT ISZERO PUSH2 0x6E5 JUMPI DUP3 DUP4 REVERT JUMPDEST PUSH2 0x6F1 DUP10 DUP3 DUP11 ADD PUSH2 0x601 JUMP JUMPDEST SWAP8 SWAP11 SWAP7 SWAP10 POP SWAP5 SWAP8 POP SWAP3 SWAP6 SWAP4 SWAP5 SWAP3 POP POP POP JUMP JUMPDEST PUSH1 0x0 DUP1 PUSH1 0x0 PUSH1 0x40 DUP5 DUP7 SUB SLT ISZERO PUSH2 0x717 JUMPI DUP3 DUP4 REVERT JUMPDEST DUP4 CALLDATALOAD SWAP3 POP PUSH1 0x20 DUP5 ADD CALLDATALOAD PUSH8 0xFFFFFFFFFFFFFFFF DUP2 GT ISZERO PUSH2 0x734 JUMPI DUP3 DUP4 REVERT JUMPDEST PUSH2 0x740 DUP7 DUP3 DUP8 ADD PUSH2 0x601 JUMP JUMPDEST SWAP5 SWAP8 SWAP1 SWAP7 POP SWAP4 SWAP5 POP POP POP POP JUMP JUMPDEST PUSH1 0x0 PUSH1 0x20 DUP3 DUP5 SUB SLT ISZERO PUSH2 0x75E JUMPI DUP1 DUP2 REVERT JUMPDEST POP MLOAD SWAP2 SWAP1 POP JUMP JUMPDEST PUSH1 0x0 DUP3 MLOAD DUP2 JUMPDEST DUP2 DUP2 LT ISZERO PUSH2 0x785 JUMPI PUSH1 0x20 DUP2 DUP7 ADD DUP2 ADD MLOAD DUP6 DUP4 ADD MSTORE ADD PUSH2 0x76B JUMP JUMPDEST DUP2 DUP2 GT ISZERO PUSH2 0x793 JUMPI DUP3 DUP3 DUP6 ADD MSTORE JUMPDEST POP SWAP2 SWAP1 SWAP2 ADD SWAP3 SWAP2 POP POP JUMP JUMPDEST PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF SWAP2 SWAP1 SWAP2 AND DUP2 MSTORE PUSH1 0x20 ADD SWAP1 JUMP JUMPDEST PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF SWAP3 DUP4 AND DUP2 MSTORE SWAP2 AND PUSH1 0x20 DUP3 ADD MSTORE PUSH1 0x40 ADD SWAP1 JUMP JUMPDEST PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF SWAP7 DUP8 AND DUP2 MSTORE SWAP5 DUP7 AND PUSH1 0x20 DUP7 ADD MSTORE PUSH1 0x40 DUP6 ADD SWAP4 SWAP1 SWAP4 MSTORE PUSH1 0x60 DUP5 ADD SWAP2 SWAP1 SWAP2 MSTORE DUP4 AND PUSH1 0x80 DUP4 ADD MSTORE SWAP1 SWAP2 AND PUSH1 0xA0 DUP3 ADD MSTORE PUSH1 0xC0 ADD SWAP1 JUMP JUMPDEST PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF SWAP6 DUP7 AND DUP2 MSTORE SWAP4 SWAP1 SWAP5 AND PUSH1 0x20 DUP5 ADD MSTORE PUSH1 0x40 DUP4 ADD SWAP2 SWAP1 SWAP2 MSTORE PUSH1 0x60 DUP3 ADD MSTORE PUSH1 0x80 DUP2 ADD SWAP2 SWAP1 SWAP2 MSTORE PUSH1 0xA0 ADD SWAP1 JUMP JUMPDEST PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF SWAP3 SWAP1 SWAP3 AND DUP3 MSTORE PUSH1 0x20 DUP3 ADD MSTORE PUSH1 0x40 ADD SWAP1 JUMP JUMPDEST PUSH32 0xFFFFFFFF00000000000000000000000000000000000000000000000000000000 SWAP2 SWAP1 SWAP2 AND DUP2 MSTORE PUSH1 0x20 ADD SWAP1 JUMP JUMPDEST PUSH1 0x60 DUP2 ADD PUSH1 0x8 DUP6 LT PUSH2 0x8CC JUMPI INVALID JUMPDEST SWAP4 DUP2 MSTORE PUSH1 0x20 DUP2 ADD SWAP3 SWAP1 SWAP3 MSTORE PUSH1 0x40 SWAP1 SWAP2 ADD MSTORE SWAP1 JUMP JUMPDEST PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF DUP2 AND DUP2 EQ PUSH2 0x902 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST POP JUMP INVALID LOG3 PUSH6 0x627A7A723158 KECCAK256 SDIV 0x2F SWAP7 CALLVALUE 0xEC 0xE6 PUSH19 0xB77DCB3F0767FAA4B5683A4E732952EFDF7AE9 JUMP PUSH10 0x2ED9608D6C6578706572 PUSH10 0x6D656E74616CF564736F PUSH13 0x63430005110040000000000000 ",
                "sourceMap": "982:2180:23:-;;;;8:9:-1;5:2;;;30:1;27;20:12;5:2;982:2180:23;;;;;;;"
            },
            "deployedBytecode": {
                "linkReferences": {},
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                "opcodes": "PUSH1 0x80 PUSH1 0x40 MSTORE CALLVALUE DUP1 ISZERO PUSH2 0x10 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST POP PUSH1 0x4 CALLDATASIZE LT PUSH2 0x36 JUMPI PUSH1 0x0 CALLDATALOAD PUSH1 0xE0 SHR DUP1 PUSH4 0x1626BA7E EQ PUSH2 0x3B JUMPI DUP1 PUSH4 0xC2DF82E6 EQ PUSH2 0x64 JUMPI JUMPDEST PUSH1 0x0 DUP1 REVERT JUMPDEST PUSH2 0x4E PUSH2 0x49 CALLDATASIZE PUSH1 0x4 PUSH2 0x703 JUMP JUMPDEST PUSH2 0x77 JUMP JUMPDEST PUSH1 0x40 MLOAD PUSH2 0x5B SWAP2 SWAP1 PUSH2 0x891 JUMP JUMPDEST PUSH1 0x40 MLOAD DUP1 SWAP2 SUB SWAP1 RETURN JUMPDEST PUSH2 0x4E PUSH2 0x72 CALLDATASIZE PUSH1 0x4 PUSH2 0x680 JUMP JUMPDEST PUSH2 0x9F JUMP JUMPDEST PUSH32 0xB067138100000000000000000000000000000000000000000000000000000000 SWAP4 SWAP3 POP POP POP JUMP JUMPDEST PUSH1 0x0 DUP1 DUP1 PUSH2 0xAF DUP5 DUP7 ADD DUP7 PUSH2 0x648 JUMP JUMPDEST SWAP2 POP SWAP2 POP PUSH1 0x0 DUP3 PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF AND PUSH4 0x70A08231 ADDRESS PUSH1 0x40 MLOAD DUP3 PUSH4 0xFFFFFFFF AND PUSH1 0xE0 SHL DUP2 MSTORE PUSH1 0x4 ADD PUSH2 0xEE SWAP2 SWAP1 PUSH2 0x79E JUMP JUMPDEST PUSH1 0x20 PUSH1 0x40 MLOAD DUP1 DUP4 SUB DUP2 DUP7 DUP1 EXTCODESIZE ISZERO DUP1 ISZERO PUSH2 0x106 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST POP GAS STATICCALL ISZERO DUP1 ISZERO PUSH2 0x11A JUMPI RETURNDATASIZE PUSH1 0x0 DUP1 RETURNDATACOPY RETURNDATASIZE PUSH1 0x0 REVERT JUMPDEST POP POP POP POP PUSH1 0x40 MLOAD RETURNDATASIZE PUSH1 0x1F NOT PUSH1 0x1F DUP3 ADD AND DUP3 ADD DUP1 PUSH1 0x40 MSTORE POP PUSH2 0x13E SWAP2 SWAP1 DUP2 ADD SWAP1 PUSH2 0x74D JUMP JUMPDEST SWAP1 POP PUSH2 0x14B DUP4 DUP4 DUP4 PUSH2 0x27B JUMP JUMPDEST PUSH1 0x40 MLOAD PUSH32 0xB2583C800000000000000000000000000000000000000000000000000000000 DUP2 MSTORE PUSH1 0x0 SWAP1 PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF DUP5 AND SWAP1 PUSH4 0xB2583C8 SWAP1 PUSH2 0x1AB SWAP1 DUP8 SWAP1 DUP16 SWAP1 DUP8 SWAP1 DUP15 SWAP1 PUSH1 0x1 TIMESTAMP ADD SWAP1 PUSH1 0x4 ADD PUSH2 0x82D JUMP JUMPDEST PUSH1 0x20 PUSH1 0x40 MLOAD DUP1 DUP4 SUB DUP2 PUSH1 0x0 DUP8 DUP1 EXTCODESIZE ISZERO DUP1 ISZERO PUSH2 0x1C5 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST POP GAS CALL ISZERO DUP1 ISZERO PUSH2 0x1D9 JUMPI RETURNDATASIZE PUSH1 0x0 DUP1 RETURNDATACOPY RETURNDATASIZE PUSH1 0x0 REVERT JUMPDEST POP POP POP POP PUSH1 0x40 MLOAD RETURNDATASIZE PUSH1 0x1F NOT PUSH1 0x1F DUP3 ADD AND DUP3 ADD DUP1 PUSH1 0x40 MSTORE POP PUSH2 0x1FD SWAP2 SWAP1 DUP2 ADD SWAP1 PUSH2 0x74D JUMP JUMPDEST SWAP1 POP PUSH2 0x20A DUP12 DUP11 DUP4 PUSH2 0x357 JUMP JUMPDEST PUSH32 0x349FC08071558D8E3AA92DEC9396E4E9F2DFECD6BB9065759D1932E7DA43B8A9 DUP5 DUP13 DUP5 DUP5 DUP15 DUP15 PUSH1 0x40 MLOAD PUSH2 0x243 SWAP7 SWAP6 SWAP5 SWAP4 SWAP3 SWAP2 SWAP1 PUSH2 0x7E6 JUMP JUMPDEST PUSH1 0x40 MLOAD DUP1 SWAP2 SUB SWAP1 LOG1 POP PUSH32 0xDC1600F300000000000000000000000000000000000000000000000000000000 SWAP11 SWAP10 POP POP POP POP POP POP POP POP POP POP JUMP JUMPDEST PUSH1 0x40 MLOAD PUSH32 0xDD62ED3E00000000000000000000000000000000000000000000000000000000 DUP2 MSTORE DUP2 SWAP1 PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF DUP6 AND SWAP1 PUSH4 0xDD62ED3E SWAP1 PUSH2 0x2D1 SWAP1 ADDRESS SWAP1 DUP8 SWAP1 PUSH1 0x4 ADD PUSH2 0x7BF JUMP JUMPDEST PUSH1 0x20 PUSH1 0x40 MLOAD DUP1 DUP4 SUB DUP2 DUP7 DUP1 EXTCODESIZE ISZERO DUP1 ISZERO PUSH2 0x2E9 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST POP GAS STATICCALL ISZERO DUP1 ISZERO PUSH2 0x2FD JUMPI RETURNDATASIZE PUSH1 0x0 DUP1 RETURNDATACOPY RETURNDATASIZE PUSH1 0x0 REVERT JUMPDEST POP POP POP POP PUSH1 0x40 MLOAD RETURNDATASIZE PUSH1 0x1F NOT PUSH1 0x1F DUP3 ADD AND DUP3 ADD DUP1 PUSH1 0x40 MSTORE POP PUSH2 0x321 SWAP2 SWAP1 DUP2 ADD SWAP1 PUSH2 0x74D JUMP JUMPDEST LT ISZERO PUSH2 0x352 JUMPI PUSH2 0x352 DUP4 DUP4 PUSH32 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF PUSH2 0x41E JUMP JUMPDEST POP POP POP JUMP JUMPDEST PUSH1 0x40 MLOAD PUSH1 0x60 SWAP1 PUSH32 0xA9059CBB00000000000000000000000000000000000000000000000000000000 SWAP1 PUSH2 0x38F SWAP1 DUP6 SWAP1 DUP6 SWAP1 PUSH1 0x24 ADD PUSH2 0x86B JUMP JUMPDEST PUSH1 0x40 DUP1 MLOAD PUSH32 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE0 DUP2 DUP5 SUB ADD DUP2 MSTORE SWAP2 SWAP1 MSTORE PUSH1 0x20 DUP2 ADD DUP1 MLOAD PUSH28 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF AND PUSH32 0xFFFFFFFF00000000000000000000000000000000000000000000000000000000 SWAP1 SWAP4 AND SWAP3 SWAP1 SWAP3 OR SWAP1 SWAP2 MSTORE SWAP1 POP PUSH2 0x418 DUP5 DUP3 PUSH2 0x456 JUMP JUMPDEST POP POP POP POP JUMP JUMPDEST PUSH1 0x40 MLOAD PUSH1 0x60 SWAP1 PUSH32 0x95EA7B300000000000000000000000000000000000000000000000000000000 SWAP1 PUSH2 0x38F SWAP1 DUP6 SWAP1 DUP6 SWAP1 PUSH1 0x24 ADD PUSH2 0x86B JUMP JUMPDEST PUSH1 0x0 PUSH1 0x60 DUP4 PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF AND DUP4 PUSH1 0x40 MLOAD PUSH2 0x47F SWAP2 SWAP1 PUSH2 0x765 JUMP JUMPDEST PUSH1 0x0 PUSH1 0x40 MLOAD DUP1 DUP4 SUB DUP2 PUSH1 0x0 DUP7 GAS CALL SWAP2 POP POP RETURNDATASIZE DUP1 PUSH1 0x0 DUP2 EQ PUSH2 0x4BC JUMPI PUSH1 0x40 MLOAD SWAP2 POP PUSH1 0x1F NOT PUSH1 0x3F RETURNDATASIZE ADD AND DUP3 ADD PUSH1 0x40 MSTORE RETURNDATASIZE DUP3 MSTORE RETURNDATASIZE PUSH1 0x0 PUSH1 0x20 DUP5 ADD RETURNDATACOPY PUSH2 0x4C1 JUMP JUMPDEST PUSH1 0x60 SWAP2 POP JUMPDEST POP SWAP2 POP SWAP2 POP DUP2 ISZERO PUSH2 0x505 JUMPI DUP1 MLOAD PUSH2 0x4D9 JUMPI POP POP PUSH2 0x50E JUMP JUMPDEST DUP1 MLOAD PUSH1 0x20 EQ ISZERO PUSH2 0x505 JUMPI PUSH1 0x0 PUSH2 0x4F0 DUP3 PUSH1 0x0 PUSH2 0x512 JUMP JUMPDEST SWAP1 POP DUP1 PUSH1 0x1 EQ ISZERO PUSH2 0x503 JUMPI POP POP POP PUSH2 0x50E JUMP JUMPDEST POP JUMPDEST PUSH2 0x418 DUP2 PUSH2 0x525 JUMP JUMPDEST POP POP JUMP JUMPDEST PUSH1 0x0 PUSH2 0x51E DUP4 DUP4 PUSH2 0x52D JUMP JUMPDEST SWAP4 SWAP3 POP POP POP JUMP JUMPDEST DUP1 MLOAD PUSH1 0x20 DUP3 ADD REVERT JUMPDEST PUSH1 0x0 DUP2 PUSH1 0x20 ADD DUP4 MLOAD LT ISZERO PUSH2 0x553 JUMPI PUSH2 0x553 PUSH2 0x54E PUSH1 0x5 DUP6 MLOAD DUP6 PUSH1 0x20 ADD PUSH2 0x55C JUMP JUMPDEST PUSH2 0x525 JUMP JUMPDEST POP ADD PUSH1 0x20 ADD MLOAD SWAP1 JUMP JUMPDEST PUSH1 0x60 PUSH4 0x28006595 PUSH1 0xE0 SHL DUP5 DUP5 DUP5 PUSH1 0x40 MLOAD PUSH1 0x24 ADD PUSH2 0x57B SWAP4 SWAP3 SWAP2 SWAP1 PUSH2 0x8BE JUMP JUMPDEST PUSH1 0x40 DUP1 MLOAD PUSH32 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE0 DUP2 DUP5 SUB ADD DUP2 MSTORE SWAP2 SWAP1 MSTORE PUSH1 0x20 DUP2 ADD DUP1 MLOAD PUSH28 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF AND PUSH32 0xFFFFFFFF00000000000000000000000000000000000000000000000000000000 SWAP1 SWAP4 AND SWAP3 SWAP1 SWAP3 OR SWAP1 SWAP2 MSTORE SWAP1 POP SWAP4 SWAP3 POP POP POP JUMP JUMPDEST PUSH1 0x0 DUP1 DUP4 PUSH1 0x1F DUP5 ADD SLT PUSH2 0x612 JUMPI DUP2 DUP3 REVERT JUMPDEST POP DUP2 CALLDATALOAD PUSH8 0xFFFFFFFFFFFFFFFF DUP2 GT ISZERO PUSH2 0x629 JUMPI DUP2 DUP3 REVERT JUMPDEST PUSH1 0x20 DUP4 ADD SWAP2 POP DUP4 PUSH1 0x20 DUP3 DUP6 ADD ADD GT ISZERO PUSH2 0x641 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST SWAP3 POP SWAP3 SWAP1 POP JUMP JUMPDEST PUSH1 0x0 DUP1 PUSH1 0x40 DUP4 DUP6 SUB SLT ISZERO PUSH2 0x65A JUMPI DUP2 DUP3 REVERT JUMPDEST DUP3 CALLDATALOAD PUSH2 0x665 DUP2 PUSH2 0x8E0 JUMP JUMPDEST SWAP2 POP PUSH1 0x20 DUP4 ADD CALLDATALOAD PUSH2 0x675 DUP2 PUSH2 0x8E0 JUMP JUMPDEST DUP1 SWAP2 POP POP SWAP3 POP SWAP3 SWAP1 POP JUMP JUMPDEST PUSH1 0x0 DUP1 PUSH1 0x0 DUP1 PUSH1 0x0 DUP1 PUSH1 0xA0 DUP8 DUP10 SUB SLT ISZERO PUSH2 0x698 JUMPI DUP2 DUP3 REVERT JUMPDEST DUP7 CALLDATALOAD PUSH2 0x6A3 DUP2 PUSH2 0x8E0 JUMP JUMPDEST SWAP6 POP PUSH1 0x20 DUP8 ADD CALLDATALOAD PUSH2 0x6B3 DUP2 PUSH2 0x8E0 JUMP JUMPDEST SWAP5 POP PUSH1 0x40 DUP8 ADD CALLDATALOAD PUSH2 0x6C3 DUP2 PUSH2 0x8E0 JUMP JUMPDEST SWAP4 POP PUSH1 0x60 DUP8 ADD CALLDATALOAD SWAP3 POP PUSH1 0x80 DUP8 ADD CALLDATALOAD PUSH8 0xFFFFFFFFFFFFFFFF DUP2 GT ISZERO PUSH2 0x6E5 JUMPI DUP3 DUP4 REVERT JUMPDEST PUSH2 0x6F1 DUP10 DUP3 DUP11 ADD PUSH2 0x601 JUMP JUMPDEST SWAP8 SWAP11 SWAP7 SWAP10 POP SWAP5 SWAP8 POP SWAP3 SWAP6 SWAP4 SWAP5 SWAP3 POP POP POP JUMP JUMPDEST PUSH1 0x0 DUP1 PUSH1 0x0 PUSH1 0x40 DUP5 DUP7 SUB SLT ISZERO PUSH2 0x717 JUMPI DUP3 DUP4 REVERT JUMPDEST DUP4 CALLDATALOAD SWAP3 POP PUSH1 0x20 DUP5 ADD CALLDATALOAD PUSH8 0xFFFFFFFFFFFFFFFF DUP2 GT ISZERO PUSH2 0x734 JUMPI DUP3 DUP4 REVERT JUMPDEST PUSH2 0x740 DUP7 DUP3 DUP8 ADD PUSH2 0x601 JUMP JUMPDEST SWAP5 SWAP8 SWAP1 SWAP7 POP SWAP4 SWAP5 POP POP POP POP JUMP JUMPDEST PUSH1 0x0 PUSH1 0x20 DUP3 DUP5 SUB SLT ISZERO PUSH2 0x75E JUMPI DUP1 DUP2 REVERT JUMPDEST POP MLOAD SWAP2 SWAP1 POP JUMP JUMPDEST PUSH1 0x0 DUP3 MLOAD DUP2 JUMPDEST DUP2 DUP2 LT ISZERO PUSH2 0x785 JUMPI PUSH1 0x20 DUP2 DUP7 ADD DUP2 ADD MLOAD DUP6 DUP4 ADD MSTORE ADD PUSH2 0x76B JUMP JUMPDEST DUP2 DUP2 GT ISZERO PUSH2 0x793 JUMPI DUP3 DUP3 DUP6 ADD MSTORE JUMPDEST POP SWAP2 SWAP1 SWAP2 ADD SWAP3 SWAP2 POP POP JUMP JUMPDEST PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF SWAP2 SWAP1 SWAP2 AND DUP2 MSTORE PUSH1 0x20 ADD SWAP1 JUMP JUMPDEST PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF SWAP3 DUP4 AND DUP2 MSTORE SWAP2 AND PUSH1 0x20 DUP3 ADD MSTORE PUSH1 0x40 ADD SWAP1 JUMP JUMPDEST PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF SWAP7 DUP8 AND DUP2 MSTORE SWAP5 DUP7 AND PUSH1 0x20 DUP7 ADD MSTORE PUSH1 0x40 DUP6 ADD SWAP4 SWAP1 SWAP4 MSTORE PUSH1 0x60 DUP5 ADD SWAP2 SWAP1 SWAP2 MSTORE DUP4 AND PUSH1 0x80 DUP4 ADD MSTORE SWAP1 SWAP2 AND PUSH1 0xA0 DUP3 ADD MSTORE PUSH1 0xC0 ADD SWAP1 JUMP JUMPDEST PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF SWAP6 DUP7 AND DUP2 MSTORE SWAP4 SWAP1 SWAP5 AND PUSH1 0x20 DUP5 ADD MSTORE PUSH1 0x40 DUP4 ADD SWAP2 SWAP1 SWAP2 MSTORE PUSH1 0x60 DUP3 ADD MSTORE PUSH1 0x80 DUP2 ADD SWAP2 SWAP1 SWAP2 MSTORE PUSH1 0xA0 ADD SWAP1 JUMP JUMPDEST PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF SWAP3 SWAP1 SWAP3 AND DUP3 MSTORE PUSH1 0x20 DUP3 ADD MSTORE PUSH1 0x40 ADD SWAP1 JUMP JUMPDEST PUSH32 0xFFFFFFFF00000000000000000000000000000000000000000000000000000000 SWAP2 SWAP1 SWAP2 AND DUP2 MSTORE PUSH1 0x20 ADD SWAP1 JUMP JUMPDEST PUSH1 0x60 DUP2 ADD PUSH1 0x8 DUP6 LT PUSH2 0x8CC JUMPI INVALID JUMPDEST SWAP4 DUP2 MSTORE PUSH1 0x20 DUP2 ADD SWAP3 SWAP1 SWAP3 MSTORE PUSH1 0x40 SWAP1 SWAP2 ADD MSTORE SWAP1 JUMP JUMPDEST PUSH20 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF DUP2 AND DUP2 EQ PUSH2 0x902 JUMPI PUSH1 0x0 DUP1 REVERT JUMPDEST POP JUMP INVALID LOG3 PUSH6 0x627A7A723158 KECCAK256 SDIV 0x2F SWAP7 CALLVALUE 0xEC 0xE6 PUSH19 0xB77DCB3F0767FAA4B5683A4E732952EFDF7AE9 JUMP PUSH10 0x2ED9608D6C6578706572 PUSH10 0x6D656E74616CF564736F PUSH13 0x63430005110040000000000000 ",
                "sourceMap": 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            }
        }
    },
    "sourceTreeHashHex": "0xe918190381e0e10d1df1b5eda6a1a699a7f3d82039cd98d66fad0a416a8a5962",
    "sources": {
        "./ShellBridge.sol": {
            "id": 23,
            "content": "/*\n\n  Copyright 2019 ZeroEx Intl.\n\n  Licensed under the Apache License, Version 2.0 (the \"License\");\n  you may not use this file except in compliance with the License.\n  You may obtain a copy of the License at\n\n    http://www.apache.org/licenses/LICENSE-2.0\n\n  Unless required by applicable law or agreed to in writing, software\n  distributed under the License is distributed on an \"AS IS\" BASIS,\n  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n  See the License for the specific language governing permissions and\n  limitations under the License.\n\n*/\n\npragma solidity ^0.5.9;\npragma experimental ABIEncoderV2;\n\nimport \"@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol\";\nimport \"@0x/contracts-erc20/contracts/src/LibERC20Token.sol\";\nimport \"@0x/contracts-exchange-libs/contracts/src/IWallet.sol\";\nimport \"@0x/contracts-utils/contracts/src/DeploymentConstants.sol\";\nimport \"../interfaces/IERC20Bridge.sol\";\nimport \"../interfaces/IShell.sol\";\n\n\ncontract ShellBridge is\n    IERC20Bridge,\n    IWallet,\n    DeploymentConstants\n{\n\n    /// @dev Swaps specified tokens against the Shell contract\n    /// @param toTokenAddress The token to give to `to`.\n    /// @param from The maker (this contract).\n    /// @param to The recipient of the bought tokens.\n    /// @param amount Minimum amount of `toTokenAddress` tokens to buy.\n    /// @param bridgeData The abi-encoded \"from\" token address.\n    /// @return success The magic bytes if successful.\n    // solhint-disable no-unused-vars\n    function bridgeTransferFrom(\n        address toTokenAddress,\n        address from,\n        address to,\n        uint256 amount,\n        bytes calldata bridgeData\n    )\n        external\n        returns (bytes4 success)\n    {\n        // Decode the bridge data to get the `fromTokenAddress` and `pool`.\n        (address fromTokenAddress, address pool) = abi.decode(bridgeData, (address, address));\n\n        uint256 fromTokenBalance = IERC20Token(fromTokenAddress).balanceOf(address(this));\n        // Grant an allowance to the exchange to spend `fromTokenAddress` token.\n        LibERC20Token.approveIfBelow(fromTokenAddress, pool, fromTokenBalance);\n\n        // Try to sell all of this contract's `fromTokenAddress` token balance.\n        uint256 boughtAmount = IShell(pool).originSwap(\n            fromTokenAddress,\n            toTokenAddress,\n            fromTokenBalance,\n            amount, // min amount\n            block.timestamp + 1\n        );\n        LibERC20Token.transfer(toTokenAddress, to, boughtAmount);\n\n        emit ERC20BridgeTransfer(\n            fromTokenAddress,\n            toTokenAddress,\n            fromTokenBalance,\n            boughtAmount,\n            from,\n            to\n        );\n        return BRIDGE_SUCCESS;\n    }\n\n    /// @dev `SignatureType.Wallet` callback, so that this bridge can be the maker\n    ///      and sign for itself in orders. Always succeeds.\n    /// @return magicValue Magic success bytes, always.\n    function isValidSignature(\n        bytes32,\n        bytes calldata\n    )\n        external\n        view\n        returns (bytes4 magicValue)\n    {\n        return LEGACY_WALLET_MAGIC_VALUE;\n    }\n}\n"
        },
        "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol": {
            "id": 62,
            "content": "/*\n\n  Copyright 2019 ZeroEx Intl.\n\n  Licensed under the Apache License, Version 2.0 (the \"License\");\n  you may not use this file except in compliance with the License.\n  You may obtain a copy of the License at\n\n    http://www.apache.org/licenses/LICENSE-2.0\n\n  Unless required by applicable law or agreed to in writing, software\n  distributed under the License is distributed on an \"AS IS\" BASIS,\n  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n  See the License for the specific language governing permissions and\n  limitations under the License.\n\n*/\n\npragma solidity ^0.5.9;\n\n\ncontract IERC20Token {\n\n    // solhint-disable no-simple-event-func-name\n    event Transfer(\n        address indexed _from,\n        address indexed _to,\n        uint256 _value\n    );\n\n    event Approval(\n        address indexed _owner,\n        address indexed _spender,\n        uint256 _value\n    );\n\n    /// @dev send `value` token to `to` from `msg.sender`\n    /// @param _to The address of the recipient\n    /// @param _value The amount of token to be transferred\n    /// @return True if transfer was successful\n    function transfer(address _to, uint256 _value)\n        external\n        returns (bool);\n\n    /// @dev send `value` token to `to` from `from` on the condition it is approved by `from`\n    /// @param _from The address of the sender\n    /// @param _to The address of the recipient\n    /// @param _value The amount of token to be transferred\n    /// @return True if transfer was successful\n    function transferFrom(\n        address _from,\n        address _to,\n        uint256 _value\n    )\n        external\n        returns (bool);\n\n    /// @dev `msg.sender` approves `_spender` to spend `_value` tokens\n    /// @param _spender The address of the account able to transfer the tokens\n    /// @param _value The amount of wei to be approved for transfer\n    /// @return Always true if the call has enough gas to complete execution\n    function approve(address _spender, uint256 _value)\n        external\n        returns (bool);\n\n    /// @dev Query total supply of token\n    /// @return Total supply of token\n    function totalSupply()\n        external\n        view\n        returns (uint256);\n\n    /// @param _owner The address from which the balance will be retrieved\n    /// @return Balance of owner\n    function balanceOf(address _owner)\n        external\n        view\n        returns (uint256);\n\n    /// @param _owner The address of the account owning tokens\n    /// @param _spender The address of the account able to transfer the tokens\n    /// @return Amount of remaining tokens allowed to spent\n    function allowance(address _owner, address _spender)\n        external\n        view\n        returns (uint256);\n}\n"
        },
        "@0x/contracts-erc20/contracts/src/LibERC20Token.sol": {
            "id": 61,
            "content": "/*\n\n  Copyright 2019 ZeroEx Intl.\n\n  Licensed under the Apache License, Version 2.0 (the \"License\");\n  you may not use this file except in compliance with the License.\n  You may obtain a copy of the License at\n\n    http://www.apache.org/licenses/LICENSE-2.0\n\n  Unless required by applicable law or agreed to in writing, software\n  distributed under the License is distributed on an \"AS IS\" BASIS,\n  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n  See the License for the specific language governing permissions and\n  limitations under the License.\n\n*/\n\npragma solidity ^0.5.9;\n\nimport \"@0x/contracts-utils/contracts/src/LibRichErrors.sol\";\nimport \"@0x/contracts-utils/contracts/src/LibBytes.sol\";\nimport \"../src/interfaces/IERC20Token.sol\";\n\n\nlibrary LibERC20Token {\n    bytes constant private DECIMALS_CALL_DATA = hex\"313ce567\";\n\n    /// @dev Calls `IERC20Token(token).approve()`.\n    ///      Reverts if `false` is returned or if the return\n    ///      data length is nonzero and not 32 bytes.\n    /// @param token The address of the token contract.\n    /// @param spender The address that receives an allowance.\n    /// @param allowance The allowance to set.\n    function approve(\n        address token,\n        address spender,\n        uint256 allowance\n    )\n        internal\n    {\n        bytes memory callData = abi.encodeWithSelector(\n            IERC20Token(0).approve.selector,\n            spender,\n            allowance\n        );\n        _callWithOptionalBooleanResult(token, callData);\n    }\n\n    /// @dev Calls `IERC20Token(token).approve()` and sets the allowance to the\n    ///      maximum if the current approval is not already >= an amount.\n    ///      Reverts if `false` is returned or if the return\n    ///      data length is nonzero and not 32 bytes.\n    /// @param token The address of the token contract.\n    /// @param spender The address that receives an allowance.\n    /// @param amount The minimum allowance needed.\n    function approveIfBelow(\n        address token,\n        address spender,\n        uint256 amount\n    )\n        internal\n    {\n        if (IERC20Token(token).allowance(address(this), spender) < amount) {\n            approve(token, spender, uint256(-1));\n        }\n    }\n\n    /// @dev Calls `IERC20Token(token).transfer()`.\n    ///      Reverts if `false` is returned or if the return\n    ///      data length is nonzero and not 32 bytes.\n    /// @param token The address of the token contract.\n    /// @param to The address that receives the tokens\n    /// @param amount Number of tokens to transfer.\n    function transfer(\n        address token,\n        address to,\n        uint256 amount\n    )\n        internal\n    {\n        bytes memory callData = abi.encodeWithSelector(\n            IERC20Token(0).transfer.selector,\n            to,\n            amount\n        );\n        _callWithOptionalBooleanResult(token, callData);\n    }\n\n    /// @dev Calls `IERC20Token(token).transferFrom()`.\n    ///      Reverts if `false` is returned or if the return\n    ///      data length is nonzero and not 32 bytes.\n    /// @param token The address of the token contract.\n    /// @param from The owner of the tokens.\n    /// @param to The address that receives the tokens\n    /// @param amount Number of tokens to transfer.\n    function transferFrom(\n        address token,\n        address from,\n        address to,\n        uint256 amount\n    )\n        internal\n    {\n        bytes memory callData = abi.encodeWithSelector(\n            IERC20Token(0).transferFrom.selector,\n            from,\n            to,\n            amount\n        );\n        _callWithOptionalBooleanResult(token, callData);\n    }\n\n    /// @dev Retrieves the number of decimals for a token.\n    ///      Returns `18` if the call reverts.\n    /// @param token The address of the token contract.\n    /// @return tokenDecimals The number of decimals places for the token.\n    function decimals(address token)\n        internal\n        view\n        returns (uint8 tokenDecimals)\n    {\n        tokenDecimals = 18;\n        (bool didSucceed, bytes memory resultData) = token.staticcall(DECIMALS_CALL_DATA);\n        if (didSucceed && resultData.length == 32) {\n            tokenDecimals = uint8(LibBytes.readUint256(resultData, 0));\n        }\n    }\n\n    /// @dev Retrieves the allowance for a token, owner, and spender.\n    ///      Returns `0` if the call reverts.\n    /// @param token The address of the token contract.\n    /// @param owner The owner of the tokens.\n    /// @param spender The address the spender.\n    /// @return allowance The allowance for a token, owner, and spender.\n    function allowance(address token, address owner, address spender)\n        internal\n        view\n        returns (uint256 allowance_)\n    {\n        (bool didSucceed, bytes memory resultData) = token.staticcall(\n            abi.encodeWithSelector(\n                IERC20Token(0).allowance.selector,\n                owner,\n                spender\n            )\n        );\n        if (didSucceed && resultData.length == 32) {\n            allowance_ = LibBytes.readUint256(resultData, 0);\n        }\n    }\n\n    /// @dev Retrieves the balance for a token owner.\n    ///      Returns `0` if the call reverts.\n    /// @param token The address of the token contract.\n    /// @param owner The owner of the tokens.\n    /// @return balance The token balance of an owner.\n    function balanceOf(address token, address owner)\n        internal\n        view\n        returns (uint256 balance)\n    {\n        (bool didSucceed, bytes memory resultData) = token.staticcall(\n            abi.encodeWithSelector(\n                IERC20Token(0).balanceOf.selector,\n                owner\n            )\n        );\n        if (didSucceed && resultData.length == 32) {\n            balance = LibBytes.readUint256(resultData, 0);\n        }\n    }\n\n    /// @dev Executes a call on address `target` with calldata `callData`\n    ///      and asserts that either nothing was returned or a single boolean\n    ///      was returned equal to `true`.\n    /// @param target The call target.\n    /// @param callData The abi-encoded call data.\n    function _callWithOptionalBooleanResult(\n        address target,\n        bytes memory callData\n    )\n        private\n    {\n        (bool didSucceed, bytes memory resultData) = target.call(callData);\n        if (didSucceed) {\n            if (resultData.length == 0) {\n                return;\n            }\n            if (resultData.length == 32) {\n                uint256 result = LibBytes.readUint256(resultData, 0);\n                if (result == 1) {\n                    return;\n                }\n            }\n        }\n        LibRichErrors.rrevert(resultData);\n    }\n}\n"
        },
        "@0x/contracts-utils/contracts/src/LibRichErrors.sol": {
            "id": 75,
            "content": "/*\n\n  Copyright 2019 ZeroEx Intl.\n\n  Licensed under the Apache License, Version 2.0 (the \"License\");\n  you may not use this file except in compliance with the License.\n  You may obtain a copy of the License at\n\n    http://www.apache.org/licenses/LICENSE-2.0\n\n  Unless required by applicable law or agreed to in writing, software\n  distributed under the License is distributed on an \"AS IS\" BASIS,\n  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n  See the License for the specific language governing permissions and\n  limitations under the License.\n\n*/\n\npragma solidity ^0.5.9;\n\n\nlibrary LibRichErrors {\n\n    // bytes4(keccak256(\"Error(string)\"))\n    bytes4 internal constant STANDARD_ERROR_SELECTOR =\n        0x08c379a0;\n\n    // solhint-disable func-name-mixedcase\n    /// @dev ABI encode a standard, string revert error payload.\n    ///      This is the same payload that would be included by a `revert(string)`\n    ///      solidity statement. It has the function signature `Error(string)`.\n    /// @param message The error string.\n    /// @return The ABI encoded error.\n    function StandardError(\n        string memory message\n    )\n        internal\n        pure\n        returns (bytes memory)\n    {\n        return abi.encodeWithSelector(\n            STANDARD_ERROR_SELECTOR,\n            bytes(message)\n        );\n    }\n    // solhint-enable func-name-mixedcase\n\n    /// @dev Reverts an encoded rich revert reason `errorData`.\n    /// @param errorData ABI encoded error data.\n    function rrevert(bytes memory errorData)\n        internal\n        pure\n    {\n        assembly {\n            revert(add(errorData, 0x20), mload(errorData))\n        }\n    }\n}\n"
        },
        "@0x/contracts-utils/contracts/src/LibBytes.sol": {
            "id": 72,
            "content": "/*\n\n  Copyright 2019 ZeroEx Intl.\n\n  Licensed under the Apache License, Version 2.0 (the \"License\");\n  you may not use this file except in compliance with the License.\n  You may obtain a copy of the License at\n\n    http://www.apache.org/licenses/LICENSE-2.0\n\n  Unless required by applicable law or agreed to in writing, software\n  distributed under the License is distributed on an \"AS IS\" BASIS,\n  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n  See the License for the specific language governing permissions and\n  limitations under the License.\n\n*/\n\npragma solidity ^0.5.9;\n\nimport \"./LibBytesRichErrors.sol\";\nimport \"./LibRichErrors.sol\";\n\n\nlibrary LibBytes {\n\n    using LibBytes for bytes;\n\n    /// @dev Gets the memory address for a byte array.\n    /// @param input Byte array to lookup.\n    /// @return memoryAddress Memory address of byte array. This\n    ///         points to the header of the byte array which contains\n    ///         the length.\n    function rawAddress(bytes memory input)\n        internal\n        pure\n        returns (uint256 memoryAddress)\n    {\n        assembly {\n            memoryAddress := input\n        }\n        return memoryAddress;\n    }\n\n    /// @dev Gets the memory address for the contents of a byte array.\n    /// @param input Byte array to lookup.\n    /// @return memoryAddress Memory address of the contents of the byte array.\n    function contentAddress(bytes memory input)\n        internal\n        pure\n        returns (uint256 memoryAddress)\n    {\n        assembly {\n            memoryAddress := add(input, 32)\n        }\n        return memoryAddress;\n    }\n\n    /// @dev Copies `length` bytes from memory location `source` to `dest`.\n    /// @param dest memory address to copy bytes to.\n    /// @param source memory address to copy bytes from.\n    /// @param length number of bytes to copy.\n    function memCopy(\n        uint256 dest,\n        uint256 source,\n        uint256 length\n    )\n        internal\n        pure\n    {\n        if (length < 32) {\n            // Handle a partial word by reading destination and masking\n            // off the bits we are interested in.\n            // This correctly handles overlap, zero lengths and source == dest\n            assembly {\n                let mask := sub(exp(256, sub(32, length)), 1)\n                let s := and(mload(source), not(mask))\n                let d := and(mload(dest), mask)\n                mstore(dest, or(s, d))\n            }\n        } else {\n            // Skip the O(length) loop when source == dest.\n            if (source == dest) {\n                return;\n            }\n\n            // For large copies we copy whole words at a time. The final\n            // word is aligned to the end of the range (instead of after the\n            // previous) to handle partial words. So a copy will look like this:\n            //\n            //  ####\n            //      ####\n            //          ####\n            //            ####\n            //\n            // We handle overlap in the source and destination range by\n            // changing the copying direction. This prevents us from\n            // overwriting parts of source that we still need to copy.\n            //\n            // This correctly handles source == dest\n            //\n            if (source > dest) {\n                assembly {\n                    // We subtract 32 from `sEnd` and `dEnd` because it\n                    // is easier to compare with in the loop, and these\n                    // are also the addresses we need for copying the\n                    // last bytes.\n                    length := sub(length, 32)\n                    let sEnd := add(source, length)\n                    let dEnd := add(dest, length)\n\n                    // Remember the last 32 bytes of source\n                    // This needs to be done here and not after the loop\n                    // because we may have overwritten the last bytes in\n                    // source already due to overlap.\n                    let last := mload(sEnd)\n\n                    // Copy whole words front to back\n                    // Note: the first check is always true,\n                    // this could have been a do-while loop.\n                    // solhint-disable-next-line no-empty-blocks\n                    for {} lt(source, sEnd) {} {\n                        mstore(dest, mload(source))\n                        source := add(source, 32)\n                        dest := add(dest, 32)\n                    }\n\n                    // Write the last 32 bytes\n                    mstore(dEnd, last)\n                }\n            } else {\n                assembly {\n                    // We subtract 32 from `sEnd` and `dEnd` because those\n                    // are the starting points when copying a word at the end.\n                    length := sub(length, 32)\n                    let sEnd := add(source, length)\n                    let dEnd := add(dest, length)\n\n                    // Remember the first 32 bytes of source\n                    // This needs to be done here and not after the loop\n                    // because we may have overwritten the first bytes in\n                    // source already due to overlap.\n                    let first := mload(source)\n\n                    // Copy whole words back to front\n                    // We use a signed comparisson here to allow dEnd to become\n                    // negative (happens when source and dest < 32). Valid\n                    // addresses in local memory will never be larger than\n                    // 2**255, so they can be safely re-interpreted as signed.\n                    // Note: the first check is always true,\n                    // this could have been a do-while loop.\n                    // solhint-disable-next-line no-empty-blocks\n                    for {} slt(dest, dEnd) {} {\n                        mstore(dEnd, mload(sEnd))\n                        sEnd := sub(sEnd, 32)\n                        dEnd := sub(dEnd, 32)\n                    }\n\n                    // Write the first 32 bytes\n                    mstore(dest, first)\n                }\n            }\n        }\n    }\n\n    /// @dev Returns a slices from a byte array.\n    /// @param b The byte array to take a slice from.\n    /// @param from The starting index for the slice (inclusive).\n    /// @param to The final index for the slice (exclusive).\n    /// @return result The slice containing bytes at indices [from, to)\n    function slice(\n        bytes memory b,\n        uint256 from,\n        uint256 to\n    )\n        internal\n        pure\n        returns (bytes memory result)\n    {\n        // Ensure that the from and to positions are valid positions for a slice within\n        // the byte array that is being used.\n        if (from > to) {\n            LibRichErrors.rrevert(LibBytesRichErrors.InvalidByteOperationError(\n                LibBytesRichErrors.InvalidByteOperationErrorCodes.FromLessThanOrEqualsToRequired,\n                from,\n                to\n            ));\n        }\n        if (to > b.length) {\n            LibRichErrors.rrevert(LibBytesRichErrors.InvalidByteOperationError(\n                LibBytesRichErrors.InvalidByteOperationErrorCodes.ToLessThanOrEqualsLengthRequired,\n                to,\n                b.length\n            ));\n        }\n\n        // Create a new bytes structure and copy contents\n        result = new bytes(to - from);\n        memCopy(\n            result.contentAddress(),\n            b.contentAddress() + from,\n            result.length\n        );\n        return result;\n    }\n\n    /// @dev Returns a slice from a byte array without preserving the input.\n    /// @param b The byte array to take a slice from. Will be destroyed in the process.\n    /// @param from The starting index for the slice (inclusive).\n    /// @param to The final index for the slice (exclusive).\n    /// @return result The slice containing bytes at indices [from, to)\n    /// @dev When `from == 0`, the original array will match the slice. In other cases its state will be corrupted.\n    function sliceDestructive(\n        bytes memory b,\n        uint256 from,\n        uint256 to\n    )\n        internal\n        pure\n        returns (bytes memory result)\n    {\n        // Ensure that the from and to positions are valid positions for a slice within\n        // the byte array that is being used.\n        if (from > to) {\n            LibRichErrors.rrevert(LibBytesRichErrors.InvalidByteOperationError(\n                LibBytesRichErrors.InvalidByteOperationErrorCodes.FromLessThanOrEqualsToRequired,\n                from,\n                to\n            ));\n        }\n        if (to > b.length) {\n            LibRichErrors.rrevert(LibBytesRichErrors.InvalidByteOperationError(\n                LibBytesRichErrors.InvalidByteOperationErrorCodes.ToLessThanOrEqualsLengthRequired,\n                to,\n                b.length\n            ));\n        }\n\n        // Create a new bytes structure around [from, to) in-place.\n        assembly {\n            result := add(b, from)\n            mstore(result, sub(to, from))\n        }\n        return result;\n    }\n\n    /// @dev Pops the last byte off of a byte array by modifying its length.\n    /// @param b Byte array that will be modified.\n    /// @return The byte that was popped off.\n    function popLastByte(bytes memory b)\n        internal\n        pure\n        returns (bytes1 result)\n    {\n        if (b.length == 0) {\n            LibRichErrors.rrevert(LibBytesRichErrors.InvalidByteOperationError(\n                LibBytesRichErrors.InvalidByteOperationErrorCodes.LengthGreaterThanZeroRequired,\n                b.length,\n                0\n            ));\n        }\n\n        // Store last byte.\n        result = b[b.length - 1];\n\n        assembly {\n            // Decrement length of byte array.\n            let newLen := sub(mload(b), 1)\n            mstore(b, newLen)\n        }\n        return result;\n    }\n\n    /// @dev Tests equality of two byte arrays.\n    /// @param lhs First byte array to compare.\n    /// @param rhs Second byte array to compare.\n    /// @return True if arrays are the same. False otherwise.\n    function equals(\n        bytes memory lhs,\n        bytes memory rhs\n    )\n        internal\n        pure\n        returns (bool equal)\n    {\n        // Keccak gas cost is 30 + numWords * 6. This is a cheap way to compare.\n        // We early exit on unequal lengths, but keccak would also correctly\n        // handle this.\n        return lhs.length == rhs.length && keccak256(lhs) == keccak256(rhs);\n    }\n\n    /// @dev Reads an address from a position in a byte array.\n    /// @param b Byte array containing an address.\n    /// @param index Index in byte array of address.\n    /// @return address from byte array.\n    function readAddress(\n        bytes memory b,\n        uint256 index\n    )\n        internal\n        pure\n        returns (address result)\n    {\n        if (b.length < index + 20) {\n            LibRichErrors.rrevert(LibBytesRichErrors.InvalidByteOperationError(\n                LibBytesRichErrors.InvalidByteOperationErrorCodes.LengthGreaterThanOrEqualsTwentyRequired,\n                b.length,\n                index + 20 // 20 is length of address\n            ));\n        }\n\n        // Add offset to index:\n        // 1. Arrays are prefixed by 32-byte length parameter (add 32 to index)\n        // 2. Account for size difference between address length and 32-byte storage word (subtract 12 from index)\n        index += 20;\n\n        // Read address from array memory\n        assembly {\n            // 1. Add index to address of bytes array\n            // 2. Load 32-byte word from memory\n            // 3. Apply 20-byte mask to obtain address\n            result := and(mload(add(b, index)), 0xffffffffffffffffffffffffffffffffffffffff)\n        }\n        return result;\n    }\n\n    /// @dev Writes an address into a specific position in a byte array.\n    /// @param b Byte array to insert address into.\n    /// @param index Index in byte array of address.\n    /// @param input Address to put into byte array.\n    function writeAddress(\n        bytes memory b,\n        uint256 index,\n        address input\n    )\n        internal\n        pure\n    {\n        if (b.length < index + 20) {\n            LibRichErrors.rrevert(LibBytesRichErrors.InvalidByteOperationError(\n                LibBytesRichErrors.InvalidByteOperationErrorCodes.LengthGreaterThanOrEqualsTwentyRequired,\n                b.length,\n                index + 20 // 20 is length of address\n            ));\n        }\n\n        // Add offset to index:\n        // 1. Arrays are prefixed by 32-byte length parameter (add 32 to index)\n        // 2. Account for size difference between address length and 32-byte storage word (subtract 12 from index)\n        index += 20;\n\n        // Store address into array memory\n        assembly {\n            // The address occupies 20 bytes and mstore stores 32 bytes.\n            // First fetch the 32-byte word where we'll be storing the address, then\n            // apply a mask so we have only the bytes in the word that the address will not occupy.\n            // Then combine these bytes with the address and store the 32 bytes back to memory with mstore.\n\n            // 1. Add index to address of bytes array\n            // 2. Load 32-byte word from memory\n            // 3. Apply 12-byte mask to obtain extra bytes occupying word of memory where we'll store the address\n            let neighbors := and(\n                mload(add(b, index)),\n                0xffffffffffffffffffffffff0000000000000000000000000000000000000000\n            )\n\n            // Make sure input address is clean.\n            // (Solidity does not guarantee this)\n            input := and(input, 0xffffffffffffffffffffffffffffffffffffffff)\n\n            // Store the neighbors and address into memory\n            mstore(add(b, index), xor(input, neighbors))\n        }\n    }\n\n    /// @dev Reads a bytes32 value from a position in a byte array.\n    /// @param b Byte array containing a bytes32 value.\n    /// @param index Index in byte array of bytes32 value.\n    /// @return bytes32 value from byte array.\n    function readBytes32(\n        bytes memory b,\n        uint256 index\n    )\n        internal\n        pure\n        returns (bytes32 result)\n    {\n        if (b.length < index + 32) {\n            LibRichErrors.rrevert(LibBytesRichErrors.InvalidByteOperationError(\n                LibBytesRichErrors.InvalidByteOperationErrorCodes.LengthGreaterThanOrEqualsThirtyTwoRequired,\n                b.length,\n                index + 32\n            ));\n        }\n\n        // Arrays are prefixed by a 256 bit length parameter\n        index += 32;\n\n        // Read the bytes32 from array memory\n        assembly {\n            result := mload(add(b, index))\n        }\n        return result;\n    }\n\n    /// @dev Writes a bytes32 into a specific position in a byte array.\n    /// @param b Byte array to insert <input> into.\n    /// @param index Index in byte array of <input>.\n    /// @param input bytes32 to put into byte array.\n    function writeBytes32(\n        bytes memory b,\n        uint256 index,\n        bytes32 input\n    )\n        internal\n        pure\n    {\n        if (b.length < index + 32) {\n            LibRichErrors.rrevert(LibBytesRichErrors.InvalidByteOperationError(\n                LibBytesRichErrors.InvalidByteOperationErrorCodes.LengthGreaterThanOrEqualsThirtyTwoRequired,\n                b.length,\n                index + 32\n            ));\n        }\n\n        // Arrays are prefixed by a 256 bit length parameter\n        index += 32;\n\n        // Read the bytes32 from array memory\n        assembly {\n            mstore(add(b, index), input)\n        }\n    }\n\n    /// @dev Reads a uint256 value from a position in a byte array.\n    /// @param b Byte array containing a uint256 value.\n    /// @param index Index in byte array of uint256 value.\n    /// @return uint256 value from byte array.\n    function readUint256(\n        bytes memory b,\n        uint256 index\n    )\n        internal\n        pure\n        returns (uint256 result)\n    {\n        result = uint256(readBytes32(b, index));\n        return result;\n    }\n\n    /// @dev Writes a uint256 into a specific position in a byte array.\n    /// @param b Byte array to insert <input> into.\n    /// @param index Index in byte array of <input>.\n    /// @param input uint256 to put into byte array.\n    function writeUint256(\n        bytes memory b,\n        uint256 index,\n        uint256 input\n    )\n        internal\n        pure\n    {\n        writeBytes32(b, index, bytes32(input));\n    }\n\n    /// @dev Reads an unpadded bytes4 value from a position in a byte array.\n    /// @param b Byte array containing a bytes4 value.\n    /// @param index Index in byte array of bytes4 value.\n    /// @return bytes4 value from byte array.\n    function readBytes4(\n        bytes memory b,\n        uint256 index\n    )\n        internal\n        pure\n        returns (bytes4 result)\n    {\n        if (b.length < index + 4) {\n            LibRichErrors.rrevert(LibBytesRichErrors.InvalidByteOperationError(\n                LibBytesRichErrors.InvalidByteOperationErrorCodes.LengthGreaterThanOrEqualsFourRequired,\n                b.length,\n                index + 4\n            ));\n        }\n\n        // Arrays are prefixed by a 32 byte length field\n        index += 32;\n\n        // Read the bytes4 from array memory\n        assembly {\n            result := mload(add(b, index))\n            // Solidity does not require us to clean the trailing bytes.\n            // We do it anyway\n            result := and(result, 0xFFFFFFFF00000000000000000000000000000000000000000000000000000000)\n        }\n        return result;\n    }\n\n    /// @dev Writes a new length to a byte array.\n    ///      Decreasing length will lead to removing the corresponding lower order bytes from the byte array.\n    ///      Increasing length may lead to appending adjacent in-memory bytes to the end of the byte array.\n    /// @param b Bytes array to write new length to.\n    /// @param length New length of byte array.\n    function writeLength(bytes memory b, uint256 length)\n        internal\n        pure\n    {\n        assembly {\n            mstore(b, length)\n        }\n    }\n}\n"
        },
        "@0x/contracts-utils/contracts/src/LibBytesRichErrors.sol": {
            "id": 73,
            "content": "/*\n\n  Copyright 2019 ZeroEx Intl.\n\n  Licensed under the Apache License, Version 2.0 (the \"License\");\n  you may not use this file except in compliance with the License.\n  You may obtain a copy of the License at\n\n    http://www.apache.org/licenses/LICENSE-2.0\n\n  Unless required by applicable law or agreed to in writing, software\n  distributed under the License is distributed on an \"AS IS\" BASIS,\n  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n  See the License for the specific language governing permissions and\n  limitations under the License.\n\n*/\n\npragma solidity ^0.5.9;\n\n\nlibrary LibBytesRichErrors {\n\n    enum InvalidByteOperationErrorCodes {\n        FromLessThanOrEqualsToRequired,\n        ToLessThanOrEqualsLengthRequired,\n        LengthGreaterThanZeroRequired,\n        LengthGreaterThanOrEqualsFourRequired,\n        LengthGreaterThanOrEqualsTwentyRequired,\n        LengthGreaterThanOrEqualsThirtyTwoRequired,\n        LengthGreaterThanOrEqualsNestedBytesLengthRequired,\n        DestinationLengthGreaterThanOrEqualSourceLengthRequired\n    }\n\n    // bytes4(keccak256(\"InvalidByteOperationError(uint8,uint256,uint256)\"))\n    bytes4 internal constant INVALID_BYTE_OPERATION_ERROR_SELECTOR =\n        0x28006595;\n\n    // solhint-disable func-name-mixedcase\n    function InvalidByteOperationError(\n        InvalidByteOperationErrorCodes errorCode,\n        uint256 offset,\n        uint256 required\n    )\n        internal\n        pure\n        returns (bytes memory)\n    {\n        return abi.encodeWithSelector(\n            INVALID_BYTE_OPERATION_ERROR_SELECTOR,\n            errorCode,\n            offset,\n            required\n        );\n    }\n}\n"
        },
        "@0x/contracts-exchange-libs/contracts/src/IWallet.sol": {
            "id": 64,
            "content": "/*\n\n  Copyright 2019 ZeroEx Intl.\n\n  Licensed under the Apache License, Version 2.0 (the \"License\");\n  you may not use this file except in compliance with the License.\n  You may obtain a copy of the License at\n\n    http://www.apache.org/licenses/LICENSE-2.0\n\n  Unless required by applicable law or agreed to in writing, software\n  distributed under the License is distributed on an \"AS IS\" BASIS,\n  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n  See the License for the specific language governing permissions and\n  limitations under the License.\n\n*/\n\npragma solidity ^0.5.9;\npragma experimental ABIEncoderV2;\n\n\ncontract IWallet {\n\n    bytes4 internal constant LEGACY_WALLET_MAGIC_VALUE = 0xb0671381;\n\n    /// @dev Validates a hash with the `Wallet` signature type.\n    /// @param hash Message hash that is signed.\n    /// @param signature Proof of signing.\n    /// @return magicValue `bytes4(0xb0671381)` if the signature check succeeds.\n    function isValidSignature(\n        bytes32 hash,\n        bytes calldata signature\n    )\n        external\n        view\n        returns (bytes4 magicValue);\n}\n"
        },
        "@0x/contracts-utils/contracts/src/DeploymentConstants.sol": {
            "id": 68,
            "content": "/*\n\n  Copyright 2020 ZeroEx Intl.\n\n  Licensed under the Apache License, Version 2.0 (the \"License\");\n  you may not use this file except in compliance with the License.\n  You may obtain a copy of the License at\n\n    http://www.apache.org/licenses/LICENSE-2.0\n\n  Unless required by applicable law or agreed to in writing, software\n  distributed under the License is distributed on an \"AS IS\" BASIS,\n  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n  See the License for the specific language governing permissions and\n  limitations under the License.\n\n*/\n\npragma solidity ^0.5.9;\n\n\ncontract DeploymentConstants {\n\n    // solhint-disable separate-by-one-line-in-contract\n\n    // Mainnet addresses ///////////////////////////////////////////////////////\n    /// @dev Mainnet address of the WETH contract.\n    address constant private WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;\n    /// @dev Mainnet address of the KyberNetworkProxy contract.\n    address constant private KYBER_NETWORK_PROXY_ADDRESS = 0x9AAb3f75489902f3a48495025729a0AF77d4b11e;\n    /// @dev Mainnet address of the KyberHintHandler contract.\n    address constant private KYBER_HINT_HANDLER_ADDRESS = 0xa1C0Fa73c39CFBcC11ec9Eb1Afc665aba9996E2C;\n    /// @dev Mainnet address of the `UniswapExchangeFactory` contract.\n    address constant private UNISWAP_EXCHANGE_FACTORY_ADDRESS = 0xc0a47dFe034B400B47bDaD5FecDa2621de6c4d95;\n    /// @dev Mainnet address of the `UniswapV2Router01` contract.\n    address constant private UNISWAP_V2_ROUTER_01_ADDRESS = 0xf164fC0Ec4E93095b804a4795bBe1e041497b92a;\n    /// @dev Mainnet address of the Eth2Dai `MatchingMarket` contract.\n    address constant private ETH2DAI_ADDRESS = 0x794e6e91555438aFc3ccF1c5076A74F42133d08D;\n    /// @dev Mainnet address of the `ERC20BridgeProxy` contract\n    address constant private ERC20_BRIDGE_PROXY_ADDRESS = 0x8ED95d1746bf1E4dAb58d8ED4724f1Ef95B20Db0;\n    ///@dev Mainnet address of the `Dai` (multi-collateral) contract\n    address constant private DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F;\n    /// @dev Mainnet address of the `Chai` contract\n    address constant private CHAI_ADDRESS = 0x06AF07097C9Eeb7fD685c692751D5C66dB49c215;\n    /// @dev Mainnet address of the 0x DevUtils contract.\n    address constant private DEV_UTILS_ADDRESS = 0x74134CF88b21383713E096a5ecF59e297dc7f547;\n    /// @dev Kyber ETH pseudo-address.\n    address constant internal KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;\n    /// @dev Mainnet address of the dYdX contract.\n    address constant private DYDX_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e;\n    /// @dev Mainnet address of the GST2 contract\n    address constant private GST_ADDRESS = 0x0000000000b3F879cb30FE243b4Dfee438691c04;\n    /// @dev Mainnet address of the GST Collector\n    address constant private GST_COLLECTOR_ADDRESS = 0x000000D3b08566BE75A6DB803C03C85C0c1c5B96;\n    /// @dev Mainnet address of the mStable mUSD contract.\n    address constant private MUSD_ADDRESS = 0xe2f2a5C287993345a840Db3B0845fbC70f5935a5;\n    /// @dev Mainnet address of the Mooniswap Registry contract\n    address constant private MOONISWAP_REGISTRY = 0x71CD6666064C3A1354a3B4dca5fA1E2D3ee7D303;\n    /// @dev Mainnet address of the DODO Registry (ZOO) contract\n    address constant private DODO_REGISTRY = 0x3A97247DF274a17C59A3bd12735ea3FcDFb49950;\n    /// @dev Mainnet address of the DODO Helper contract\n    address constant private DODO_HELPER = 0x533dA777aeDCE766CEAe696bf90f8541A4bA80Eb;\n\n    // // Ropsten addresses ///////////////////////////////////////////////////////\n    // /// @dev Mainnet address of the WETH contract.\n    // address constant private WETH_ADDRESS = 0xc778417E063141139Fce010982780140Aa0cD5Ab;\n    // /// @dev Mainnet address of the KyberNetworkProxy contract.\n    // address constant private KYBER_NETWORK_PROXY_ADDRESS = 0xd719c34261e099Fdb33030ac8909d5788D3039C4;\n    // /// @dev Mainnet address of the `UniswapExchangeFactory` contract.\n    // address constant private UNISWAP_EXCHANGE_FACTORY_ADDRESS = 0x9c83dCE8CA20E9aAF9D3efc003b2ea62aBC08351;\n    // /// @dev Mainnet address of the `UniswapV2Router01` contract.\n    // address constant private UNISWAP_V2_ROUTER_01_ADDRESS = 0xf164fC0Ec4E93095b804a4795bBe1e041497b92a;\n    // /// @dev Mainnet address of the Eth2Dai `MatchingMarket` contract.\n    // address constant private ETH2DAI_ADDRESS = address(0);\n    // /// @dev Mainnet address of the `ERC20BridgeProxy` contract\n    // address constant private ERC20_BRIDGE_PROXY_ADDRESS = 0xb344afeD348de15eb4a9e180205A2B0739628339;\n    // ///@dev Mainnet address of the `Dai` (multi-collateral) contract\n    // address constant private DAI_ADDRESS = address(0);\n    // /// @dev Mainnet address of the `Chai` contract\n    // address constant private CHAI_ADDRESS = address(0);\n    // /// @dev Mainnet address of the 0x DevUtils contract.\n    // address constant private DEV_UTILS_ADDRESS = 0xC812AF3f3fBC62F76ea4262576EC0f49dB8B7f1c;\n    // /// @dev Kyber ETH pseudo-address.\n    // address constant internal KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;\n    // /// @dev Mainnet address of the dYdX contract.\n    // address constant private DYDX_ADDRESS = address(0);\n    // /// @dev Mainnet address of the GST2 contract\n    // address constant private GST_ADDRESS = address(0);\n    // /// @dev Mainnet address of the GST Collector\n    // address constant private GST_COLLECTOR_ADDRESS = address(0);\n    // /// @dev Mainnet address of the mStable mUSD contract.\n    // address constant private MUSD_ADDRESS = 0x4E1000616990D83e56f4b5fC6CC8602DcfD20459;\n\n    // // Rinkeby addresses ///////////////////////////////////////////////////////\n    // /// @dev Mainnet address of the WETH contract.\n    // address constant private WETH_ADDRESS = 0xc778417E063141139Fce010982780140Aa0cD5Ab;\n    // /// @dev Mainnet address of the KyberNetworkProxy contract.\n    // address constant private KYBER_NETWORK_PROXY_ADDRESS = 0x0d5371e5EE23dec7DF251A8957279629aa79E9C5;\n    // /// @dev Mainnet address of the `UniswapExchangeFactory` contract.\n    // address constant private UNISWAP_EXCHANGE_FACTORY_ADDRESS = 0xf5D915570BC477f9B8D6C0E980aA81757A3AaC36;\n    // /// @dev Mainnet address of the `UniswapV2Router01` contract.\n    // address constant private UNISWAP_V2_ROUTER_01_ADDRESS = 0xf164fC0Ec4E93095b804a4795bBe1e041497b92a;\n    // /// @dev Mainnet address of the Eth2Dai `MatchingMarket` contract.\n    // address constant private ETH2DAI_ADDRESS = address(0);\n    // /// @dev Mainnet address of the `ERC20BridgeProxy` contract\n    // address constant private ERC20_BRIDGE_PROXY_ADDRESS = 0xA2AA4bEFED748Fba27a3bE7Dfd2C4b2c6DB1F49B;\n    // ///@dev Mainnet address of the `Dai` (multi-collateral) contract\n    // address constant private DAI_ADDRESS = address(0);\n    // /// @dev Mainnet address of the `Chai` contract\n    // address constant private CHAI_ADDRESS = address(0);\n    // /// @dev Mainnet address of the 0x DevUtils contract.\n    // address constant private DEV_UTILS_ADDRESS = 0x46B5BC959e8A754c0256FFF73bF34A52Ad5CdfA9;\n    // /// @dev Kyber ETH pseudo-address.\n    // address constant internal KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;\n    // /// @dev Mainnet address of the dYdX contract.\n    // address constant private DYDX_ADDRESS = address(0);\n    // /// @dev Mainnet address of the GST2 contract\n    // address constant private GST_ADDRESS = address(0);\n    // /// @dev Mainnet address of the GST Collector\n    // address constant private GST_COLLECTOR_ADDRESS = address(0);\n    // /// @dev Mainnet address of the mStable mUSD contract.\n    // address constant private MUSD_ADDRESS = address(0);\n\n    // // Kovan addresses /////////////////////////////////////////////////////////\n    // /// @dev Kovan address of the WETH contract.\n    // address constant private WETH_ADDRESS = 0xd0A1E359811322d97991E03f863a0C30C2cF029C;\n    // /// @dev Kovan address of the KyberNetworkProxy contract.\n    // address constant private KYBER_NETWORK_PROXY_ADDRESS = 0x692f391bCc85cefCe8C237C01e1f636BbD70EA4D;\n    // /// @dev Kovan address of the `UniswapExchangeFactory` contract.\n    // address constant private UNISWAP_EXCHANGE_FACTORY_ADDRESS = 0xD3E51Ef092B2845f10401a0159B2B96e8B6c3D30;\n    // /// @dev Kovan address of the `UniswapV2Router01` contract.\n    // address constant private UNISWAP_V2_ROUTER_01_ADDRESS = 0xf164fC0Ec4E93095b804a4795bBe1e041497b92a;\n    // /// @dev Kovan address of the Eth2Dai `MatchingMarket` contract.\n    // address constant private ETH2DAI_ADDRESS = 0xe325acB9765b02b8b418199bf9650972299235F4;\n    // /// @dev Kovan address of the `ERC20BridgeProxy` contract\n    // address constant private ERC20_BRIDGE_PROXY_ADDRESS = 0x3577552C1Fb7A44aD76BeEB7aB53251668A21F8D;\n    // /// @dev Kovan address of the `Chai` contract\n    // address constant private CHAI_ADDRESS = address(0);\n    // /// @dev Kovan address of the `Dai` (multi-collateral) contract\n    // address constant private DAI_ADDRESS = 0x4F96Fe3b7A6Cf9725f59d353F723c1bDb64CA6Aa;\n    // /// @dev Kovan address of the 0x DevUtils contract.\n    // address constant private DEV_UTILS_ADDRESS = 0x9402639A828BdF4E9e4103ac3B69E1a6E522eB59;\n    // /// @dev Kyber ETH pseudo-address.\n    // address constant internal KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;\n    // /// @dev Kovan address of the dYdX contract.\n    // address constant private DYDX_ADDRESS = address(0);\n    // /// @dev Kovan address of the GST2 contract\n    // address constant private GST_ADDRESS = address(0);\n    // /// @dev Kovan address of the GST Collector\n    // address constant private GST_COLLECTOR_ADDRESS = address(0);\n    // /// @dev Mainnet address of the mStable mUSD contract.\n    // address constant private MUSD_ADDRESS = address(0);\n\n    /// @dev Overridable way to get the `KyberNetworkProxy` address.\n    /// @return kyberAddress The `IKyberNetworkProxy` address.\n    function _getKyberNetworkProxyAddress()\n        internal\n        view\n        returns (address kyberAddress)\n    {\n        return KYBER_NETWORK_PROXY_ADDRESS;\n    }\n\n    /// @dev Overridable way to get the `KyberHintHandler` address.\n    /// @return kyberAddress The `IKyberHintHandler` address.\n    function _getKyberHintHandlerAddress()\n        internal\n        view\n        returns (address hintHandlerAddress)\n    {\n        return KYBER_HINT_HANDLER_ADDRESS;\n    }\n\n    /// @dev Overridable way to get the WETH address.\n    /// @return wethAddress The WETH address.\n    function _getWethAddress()\n        internal\n        view\n        returns (address wethAddress)\n    {\n        return WETH_ADDRESS;\n    }\n\n    /// @dev Overridable way to get the `UniswapExchangeFactory` address.\n    /// @return uniswapAddress The `UniswapExchangeFactory` address.\n    function _getUniswapExchangeFactoryAddress()\n        internal\n        view\n        returns (address uniswapAddress)\n    {\n        return UNISWAP_EXCHANGE_FACTORY_ADDRESS;\n    }\n\n    /// @dev Overridable way to get the `UniswapV2Router01` address.\n    /// @return uniswapRouterAddress The `UniswapV2Router01` address.\n    function _getUniswapV2Router01Address()\n        internal\n        view\n        returns (address uniswapRouterAddress)\n    {\n        return UNISWAP_V2_ROUTER_01_ADDRESS;\n    }\n\n    /// @dev An overridable way to retrieve the Eth2Dai `MatchingMarket` contract.\n    /// @return eth2daiAddress The Eth2Dai `MatchingMarket` contract.\n    function _getEth2DaiAddress()\n        internal\n        view\n        returns (address eth2daiAddress)\n    {\n        return ETH2DAI_ADDRESS;\n    }\n\n    /// @dev An overridable way to retrieve the `ERC20BridgeProxy` contract.\n    /// @return erc20BridgeProxyAddress The `ERC20BridgeProxy` contract.\n    function _getERC20BridgeProxyAddress()\n        internal\n        view\n        returns (address erc20BridgeProxyAddress)\n    {\n        return ERC20_BRIDGE_PROXY_ADDRESS;\n    }\n\n    /// @dev An overridable way to retrieve the `Dai` contract.\n    /// @return daiAddress The `Dai` contract.\n    function _getDaiAddress()\n        internal\n        view\n        returns (address daiAddress)\n    {\n        return DAI_ADDRESS;\n    }\n\n    /// @dev An overridable way to retrieve the `Chai` contract.\n    /// @return chaiAddress The `Chai` contract.\n    function _getChaiAddress()\n        internal\n        view\n        returns (address chaiAddress)\n    {\n        return CHAI_ADDRESS;\n    }\n\n    /// @dev An overridable way to retrieve the 0x `DevUtils` contract address.\n    /// @return devUtils The 0x `DevUtils` contract address.\n    function _getDevUtilsAddress()\n        internal\n        view\n        returns (address devUtils)\n    {\n        return DEV_UTILS_ADDRESS;\n    }\n\n    /// @dev Overridable way to get the DyDx contract.\n    /// @return exchange The DyDx exchange contract.\n    function _getDydxAddress()\n        internal\n        view\n        returns (address dydxAddress)\n    {\n        return DYDX_ADDRESS;\n    }\n\n    /// @dev An overridable way to retrieve the GST2 contract address.\n    /// @return gst The GST contract.\n    function _getGstAddress()\n        internal\n        view\n        returns (address gst)\n    {\n        return GST_ADDRESS;\n    }\n\n    /// @dev An overridable way to retrieve the GST Collector address.\n    /// @return collector The GST collector address.\n    function _getGstCollectorAddress()\n        internal\n        view\n        returns (address collector)\n    {\n        return GST_COLLECTOR_ADDRESS;\n    }\n\n    /// @dev An overridable way to retrieve the mStable mUSD address.\n    /// @return musd The mStable mUSD address.\n    function _getMUsdAddress()\n        internal\n        view\n        returns (address musd)\n    {\n        return MUSD_ADDRESS;\n    }\n\n    /// @dev An overridable way to retrieve the Mooniswap registry address.\n    /// @return registry The Mooniswap registry address.\n    function _getMooniswapAddress()\n        internal\n        view\n        returns (address)\n    {\n        return MOONISWAP_REGISTRY;\n    }\n\n    /// @dev An overridable way to retrieve the DODO Registry contract address.\n    /// @return registry The DODO Registry contract address.\n    function _getDODORegistryAddress()\n        internal\n        view\n        returns (address)\n    {\n        return DODO_REGISTRY;\n    }\n\n    /// @dev An overridable way to retrieve the DODO Helper contract address.\n    /// @return registry The DODO Helper contract address.\n    function _getDODOHelperAddress()\n        internal\n        view\n        returns (address)\n    {\n        return DODO_HELPER;\n    }\n}\n"
        },
        "../interfaces/IERC20Bridge.sol": {
            "id": 39,
            "content": "/*\n\n  Copyright 2019 ZeroEx Intl.\n\n  Licensed under the Apache License, Version 2.0 (the \"License\");\n  you may not use this file except in compliance with the License.\n  You may obtain a copy of the License at\n\n    http://www.apache.org/licenses/LICENSE-2.0\n\n  Unless required by applicable law or agreed to in writing, software\n  distributed under the License is distributed on an \"AS IS\" BASIS,\n  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n  See the License for the specific language governing permissions and\n  limitations under the License.\n\n*/\n\npragma solidity ^0.5.9;\n\n\ncontract IERC20Bridge {\n\n    /// @dev Result of a successful bridge call.\n    bytes4 constant internal BRIDGE_SUCCESS = 0xdc1600f3;\n\n    /// @dev Emitted when a trade occurs.\n    /// @param inputToken The token the bridge is converting from.\n    /// @param outputToken The token the bridge is converting to.\n    /// @param inputTokenAmount Amount of input token.\n    /// @param outputTokenAmount Amount of output token.\n    /// @param from The `from` address in `bridgeTransferFrom()`\n    /// @param to The `to` address in `bridgeTransferFrom()`\n    event ERC20BridgeTransfer(\n        address inputToken,\n        address outputToken,\n        uint256 inputTokenAmount,\n        uint256 outputTokenAmount,\n        address from,\n        address to\n    );\n\n    /// @dev Transfers `amount` of the ERC20 `tokenAddress` from `from` to `to`.\n    /// @param tokenAddress The address of the ERC20 token to transfer.\n    /// @param from Address to transfer asset from.\n    /// @param to Address to transfer asset to.\n    /// @param amount Amount of asset to transfer.\n    /// @param bridgeData Arbitrary asset data needed by the bridge contract.\n    /// @return success The magic bytes `0xdc1600f3` if successful.\n    function bridgeTransferFrom(\n        address tokenAddress,\n        address from,\n        address to,\n        uint256 amount,\n        bytes calldata bridgeData\n    )\n        external\n        returns (bytes4 success);\n}\n"
        },
        "../interfaces/IShell.sol": {
            "id": 45,
            "content": "/*\n\n  Copyright 2020 ZeroEx Intl.\n\n  Licensed under the Apache License, Version 2.0 (the \"License\");\n  you may not use this file except in compliance with the License.\n  You may obtain a copy of the License at\n\n    http://www.apache.org/licenses/LICENSE-2.0\n\n  Unless required by applicable law or agreed to in writing, software\n  distributed under the License is distributed on an \"AS IS\" BASIS,\n  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n  See the License for the specific language governing permissions and\n  limitations under the License.\n\n*/\n\npragma solidity ^0.5.9;\n\n\ninterface IShell {\n\n    function originSwap(\n        address from,\n        address to,\n        uint256 fromAmount,\n        uint256 minTargetAmount,\n        uint256 deadline\n    )\n        external\n        returns (uint256 toAmount);\n}\n\n"
        }
    },
    "sourceCodes": {
        "./ShellBridge.sol": "/*\n\n  Copyright 2019 ZeroEx Intl.\n\n  Licensed under the Apache License, Version 2.0 (the \"License\");\n  you may not use this file except in compliance with the License.\n  You may obtain a copy of the License at\n\n    http://www.apache.org/licenses/LICENSE-2.0\n\n  Unless required by applicable law or agreed to in writing, software\n  distributed under the License is distributed on an \"AS IS\" BASIS,\n  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n  See the License for the specific language governing permissions and\n  limitations under the License.\n\n*/\n\npragma solidity ^0.5.9;\npragma experimental ABIEncoderV2;\n\nimport \"@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol\";\nimport \"@0x/contracts-erc20/contracts/src/LibERC20Token.sol\";\nimport \"@0x/contracts-exchange-libs/contracts/src/IWallet.sol\";\nimport \"@0x/contracts-utils/contracts/src/DeploymentConstants.sol\";\nimport \"../interfaces/IERC20Bridge.sol\";\nimport \"../interfaces/IShell.sol\";\n\n\ncontract ShellBridge is\n    IERC20Bridge,\n    IWallet,\n    DeploymentConstants\n{\n\n    /// @dev Swaps specified tokens against the Shell contract\n    /// @param toTokenAddress The token to give to `to`.\n    /// @param from The maker (this contract).\n    /// @param to The recipient of the bought tokens.\n    /// @param amount Minimum amount of `toTokenAddress` tokens to buy.\n    /// @param bridgeData The abi-encoded \"from\" token address.\n    /// @return success The magic bytes if successful.\n    // solhint-disable no-unused-vars\n    function bridgeTransferFrom(\n        address toTokenAddress,\n        address from,\n        address to,\n        uint256 amount,\n        bytes calldata bridgeData\n    )\n        external\n        returns (bytes4 success)\n    {\n        // Decode the bridge data to get the `fromTokenAddress` and `pool`.\n        (address fromTokenAddress, address pool) = abi.decode(bridgeData, (address, address));\n\n        uint256 fromTokenBalance = IERC20Token(fromTokenAddress).balanceOf(address(this));\n        // Grant an allowance to the exchange to spend `fromTokenAddress` token.\n        LibERC20Token.approveIfBelow(fromTokenAddress, pool, fromTokenBalance);\n\n        // Try to sell all of this contract's `fromTokenAddress` token balance.\n        uint256 boughtAmount = IShell(pool).originSwap(\n            fromTokenAddress,\n            toTokenAddress,\n            fromTokenBalance,\n            amount, // min amount\n            block.timestamp + 1\n        );\n        LibERC20Token.transfer(toTokenAddress, to, boughtAmount);\n\n        emit ERC20BridgeTransfer(\n            fromTokenAddress,\n            toTokenAddress,\n            fromTokenBalance,\n            boughtAmount,\n            from,\n            to\n        );\n        return BRIDGE_SUCCESS;\n    }\n\n    /// @dev `SignatureType.Wallet` callback, so that this bridge can be the maker\n    ///      and sign for itself in orders. Always succeeds.\n    /// @return magicValue Magic success bytes, always.\n    function isValidSignature(\n        bytes32,\n        bytes calldata\n    )\n        external\n        view\n        returns (bytes4 magicValue)\n    {\n        return LEGACY_WALLET_MAGIC_VALUE;\n    }\n}\n",
        "@0x/contracts-erc20/contracts/src/interfaces/IERC20Token.sol": "/*\n\n  Copyright 2019 ZeroEx Intl.\n\n  Licensed under the Apache License, Version 2.0 (the \"License\");\n  you may not use this file except in compliance with the License.\n  You may obtain a copy of the License at\n\n    http://www.apache.org/licenses/LICENSE-2.0\n\n  Unless required by applicable law or agreed to in writing, software\n  distributed under the License is distributed on an \"AS IS\" BASIS,\n  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n  See the License for the specific language governing permissions and\n  limitations under the License.\n\n*/\n\npragma solidity ^0.5.9;\n\n\ncontract IERC20Token {\n\n    // solhint-disable no-simple-event-func-name\n    event Transfer(\n        address indexed _from,\n        address indexed _to,\n        uint256 _value\n    );\n\n    event Approval(\n        address indexed _owner,\n        address indexed _spender,\n        uint256 _value\n    );\n\n    /// @dev send `value` token to `to` from `msg.sender`\n    /// @param _to The address of the recipient\n    /// @param _value The amount of token to be transferred\n    /// @return True if transfer was successful\n    function transfer(address _to, uint256 _value)\n        external\n        returns (bool);\n\n    /// @dev send `value` token to `to` from `from` on the condition it is approved by `from`\n    /// @param _from The address of the sender\n    /// @param _to The address of the recipient\n    /// @param _value The amount of token to be transferred\n    /// @return True if transfer was successful\n    function transferFrom(\n        address _from,\n        address _to,\n        uint256 _value\n    )\n        external\n        returns (bool);\n\n    /// @dev `msg.sender` approves `_spender` to spend `_value` tokens\n    /// @param _spender The address of the account able to transfer the tokens\n    /// @param _value The amount of wei to be approved for transfer\n    /// @return Always true if the call has enough gas to complete execution\n    function approve(address _spender, uint256 _value)\n        external\n        returns (bool);\n\n    /// @dev Query total supply of token\n    /// @return Total supply of token\n    function totalSupply()\n        external\n        view\n        returns (uint256);\n\n    /// @param _owner The address from which the balance will be retrieved\n    /// @return Balance of owner\n    function balanceOf(address _owner)\n        external\n        view\n        returns (uint256);\n\n    /// @param _owner The address of the account owning tokens\n    /// @param _spender The address of the account able to transfer the tokens\n    /// @return Amount of remaining tokens allowed to spent\n    function allowance(address _owner, address _spender)\n        external\n        view\n        returns (uint256);\n}\n",
        "@0x/contracts-erc20/contracts/src/LibERC20Token.sol": "/*\n\n  Copyright 2019 ZeroEx Intl.\n\n  Licensed under the Apache License, Version 2.0 (the \"License\");\n  you may not use this file except in compliance with the License.\n  You may obtain a copy of the License at\n\n    http://www.apache.org/licenses/LICENSE-2.0\n\n  Unless required by applicable law or agreed to in writing, software\n  distributed under the License is distributed on an \"AS IS\" BASIS,\n  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n  See the License for the specific language governing permissions and\n  limitations under the License.\n\n*/\n\npragma solidity ^0.5.9;\n\nimport \"@0x/contracts-utils/contracts/src/LibRichErrors.sol\";\nimport \"@0x/contracts-utils/contracts/src/LibBytes.sol\";\nimport \"../src/interfaces/IERC20Token.sol\";\n\n\nlibrary LibERC20Token {\n    bytes constant private DECIMALS_CALL_DATA = hex\"313ce567\";\n\n    /// @dev Calls `IERC20Token(token).approve()`.\n    ///      Reverts if `false` is returned or if the return\n    ///      data length is nonzero and not 32 bytes.\n    /// @param token The address of the token contract.\n    /// @param spender The address that receives an allowance.\n    /// @param allowance The allowance to set.\n    function approve(\n        address token,\n        address spender,\n        uint256 allowance\n    )\n        internal\n    {\n        bytes memory callData = abi.encodeWithSelector(\n            IERC20Token(0).approve.selector,\n            spender,\n            allowance\n        );\n        _callWithOptionalBooleanResult(token, callData);\n    }\n\n    /// @dev Calls `IERC20Token(token).approve()` and sets the allowance to the\n    ///      maximum if the current approval is not already >= an amount.\n    ///      Reverts if `false` is returned or if the return\n    ///      data length is nonzero and not 32 bytes.\n    /// @param token The address of the token contract.\n    /// @param spender The address that receives an allowance.\n    /// @param amount The minimum allowance needed.\n    function approveIfBelow(\n        address token,\n        address spender,\n        uint256 amount\n    )\n        internal\n    {\n        if (IERC20Token(token).allowance(address(this), spender) < amount) {\n            approve(token, spender, uint256(-1));\n        }\n    }\n\n    /// @dev Calls `IERC20Token(token).transfer()`.\n    ///      Reverts if `false` is returned or if the return\n    ///      data length is nonzero and not 32 bytes.\n    /// @param token The address of the token contract.\n    /// @param to The address that receives the tokens\n    /// @param amount Number of tokens to transfer.\n    function transfer(\n        address token,\n        address to,\n        uint256 amount\n    )\n        internal\n    {\n        bytes memory callData = abi.encodeWithSelector(\n            IERC20Token(0).transfer.selector,\n            to,\n            amount\n        );\n        _callWithOptionalBooleanResult(token, callData);\n    }\n\n    /// @dev Calls `IERC20Token(token).transferFrom()`.\n    ///      Reverts if `false` is returned or if the return\n    ///      data length is nonzero and not 32 bytes.\n    /// @param token The address of the token contract.\n    /// @param from The owner of the tokens.\n    /// @param to The address that receives the tokens\n    /// @param amount Number of tokens to transfer.\n    function transferFrom(\n        address token,\n        address from,\n        address to,\n        uint256 amount\n    )\n        internal\n    {\n        bytes memory callData = abi.encodeWithSelector(\n            IERC20Token(0).transferFrom.selector,\n            from,\n            to,\n            amount\n        );\n        _callWithOptionalBooleanResult(token, callData);\n    }\n\n    /// @dev Retrieves the number of decimals for a token.\n    ///      Returns `18` if the call reverts.\n    /// @param token The address of the token contract.\n    /// @return tokenDecimals The number of decimals places for the token.\n    function decimals(address token)\n        internal\n        view\n        returns (uint8 tokenDecimals)\n    {\n        tokenDecimals = 18;\n        (bool didSucceed, bytes memory resultData) = token.staticcall(DECIMALS_CALL_DATA);\n        if (didSucceed && resultData.length == 32) {\n            tokenDecimals = uint8(LibBytes.readUint256(resultData, 0));\n        }\n    }\n\n    /// @dev Retrieves the allowance for a token, owner, and spender.\n    ///      Returns `0` if the call reverts.\n    /// @param token The address of the token contract.\n    /// @param owner The owner of the tokens.\n    /// @param spender The address the spender.\n    /// @return allowance The allowance for a token, owner, and spender.\n    function allowance(address token, address owner, address spender)\n        internal\n        view\n        returns (uint256 allowance_)\n    {\n        (bool didSucceed, bytes memory resultData) = token.staticcall(\n            abi.encodeWithSelector(\n                IERC20Token(0).allowance.selector,\n                owner,\n                spender\n            )\n        );\n        if (didSucceed && resultData.length == 32) {\n            allowance_ = LibBytes.readUint256(resultData, 0);\n        }\n    }\n\n    /// @dev Retrieves the balance for a token owner.\n    ///      Returns `0` if the call reverts.\n    /// @param token The address of the token contract.\n    /// @param owner The owner of the tokens.\n    /// @return balance The token balance of an owner.\n    function balanceOf(address token, address owner)\n        internal\n        view\n        returns (uint256 balance)\n    {\n        (bool didSucceed, bytes memory resultData) = token.staticcall(\n            abi.encodeWithSelector(\n                IERC20Token(0).balanceOf.selector,\n                owner\n            )\n        );\n        if (didSucceed && resultData.length == 32) {\n            balance = LibBytes.readUint256(resultData, 0);\n        }\n    }\n\n    /// @dev Executes a call on address `target` with calldata `callData`\n    ///      and asserts that either nothing was returned or a single boolean\n    ///      was returned equal to `true`.\n    /// @param target The call target.\n    /// @param callData The abi-encoded call data.\n    function _callWithOptionalBooleanResult(\n        address target,\n        bytes memory callData\n    )\n        private\n    {\n        (bool didSucceed, bytes memory resultData) = target.call(callData);\n        if (didSucceed) {\n            if (resultData.length == 0) {\n                return;\n            }\n            if (resultData.length == 32) {\n                uint256 result = LibBytes.readUint256(resultData, 0);\n                if (result == 1) {\n                    return;\n                }\n            }\n        }\n        LibRichErrors.rrevert(resultData);\n    }\n}\n",
        "@0x/contracts-utils/contracts/src/LibRichErrors.sol": "/*\n\n  Copyright 2019 ZeroEx Intl.\n\n  Licensed under the Apache License, Version 2.0 (the \"License\");\n  you may not use this file except in compliance with the License.\n  You may obtain a copy of the License at\n\n    http://www.apache.org/licenses/LICENSE-2.0\n\n  Unless required by applicable law or agreed to in writing, software\n  distributed under the License is distributed on an \"AS IS\" BASIS,\n  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n  See the License for the specific language governing permissions and\n  limitations under the License.\n\n*/\n\npragma solidity ^0.5.9;\n\n\nlibrary LibRichErrors {\n\n    // bytes4(keccak256(\"Error(string)\"))\n    bytes4 internal constant STANDARD_ERROR_SELECTOR =\n        0x08c379a0;\n\n    // solhint-disable func-name-mixedcase\n    /// @dev ABI encode a standard, string revert error payload.\n    ///      This is the same payload that would be included by a `revert(string)`\n    ///      solidity statement. It has the function signature `Error(string)`.\n    /// @param message The error string.\n    /// @return The ABI encoded error.\n    function StandardError(\n        string memory message\n    )\n        internal\n        pure\n        returns (bytes memory)\n    {\n        return abi.encodeWithSelector(\n            STANDARD_ERROR_SELECTOR,\n            bytes(message)\n        );\n    }\n    // solhint-enable func-name-mixedcase\n\n    /// @dev Reverts an encoded rich revert reason `errorData`.\n    /// @param errorData ABI encoded error data.\n    function rrevert(bytes memory errorData)\n        internal\n        pure\n    {\n        assembly {\n            revert(add(errorData, 0x20), mload(errorData))\n        }\n    }\n}\n",
        "@0x/contracts-utils/contracts/src/LibBytes.sol": "/*\n\n  Copyright 2019 ZeroEx Intl.\n\n  Licensed under the Apache License, Version 2.0 (the \"License\");\n  you may not use this file except in compliance with the License.\n  You may obtain a copy of the License at\n\n    http://www.apache.org/licenses/LICENSE-2.0\n\n  Unless required by applicable law or agreed to in writing, software\n  distributed under the License is distributed on an \"AS IS\" BASIS,\n  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n  See the License for the specific language governing permissions and\n  limitations under the License.\n\n*/\n\npragma solidity ^0.5.9;\n\nimport \"./LibBytesRichErrors.sol\";\nimport \"./LibRichErrors.sol\";\n\n\nlibrary LibBytes {\n\n    using LibBytes for bytes;\n\n    /// @dev Gets the memory address for a byte array.\n    /// @param input Byte array to lookup.\n    /// @return memoryAddress Memory address of byte array. This\n    ///         points to the header of the byte array which contains\n    ///         the length.\n    function rawAddress(bytes memory input)\n        internal\n        pure\n        returns (uint256 memoryAddress)\n    {\n        assembly {\n            memoryAddress := input\n        }\n        return memoryAddress;\n    }\n\n    /// @dev Gets the memory address for the contents of a byte array.\n    /// @param input Byte array to lookup.\n    /// @return memoryAddress Memory address of the contents of the byte array.\n    function contentAddress(bytes memory input)\n        internal\n        pure\n        returns (uint256 memoryAddress)\n    {\n        assembly {\n            memoryAddress := add(input, 32)\n        }\n        return memoryAddress;\n    }\n\n    /// @dev Copies `length` bytes from memory location `source` to `dest`.\n    /// @param dest memory address to copy bytes to.\n    /// @param source memory address to copy bytes from.\n    /// @param length number of bytes to copy.\n    function memCopy(\n        uint256 dest,\n        uint256 source,\n        uint256 length\n    )\n        internal\n        pure\n    {\n        if (length < 32) {\n            // Handle a partial word by reading destination and masking\n            // off the bits we are interested in.\n            // This correctly handles overlap, zero lengths and source == dest\n            assembly {\n                let mask := sub(exp(256, sub(32, length)), 1)\n                let s := and(mload(source), not(mask))\n                let d := and(mload(dest), mask)\n                mstore(dest, or(s, d))\n            }\n        } else {\n            // Skip the O(length) loop when source == dest.\n            if (source == dest) {\n                return;\n            }\n\n            // For large copies we copy whole words at a time. The final\n            // word is aligned to the end of the range (instead of after the\n            // previous) to handle partial words. So a copy will look like this:\n            //\n            //  ####\n            //      ####\n            //          ####\n            //            ####\n            //\n            // We handle overlap in the source and destination range by\n            // changing the copying direction. This prevents us from\n            // overwriting parts of source that we still need to copy.\n            //\n            // This correctly handles source == dest\n            //\n            if (source > dest) {\n                assembly {\n                    // We subtract 32 from `sEnd` and `dEnd` because it\n                    // is easier to compare with in the loop, and these\n                    // are also the addresses we need for copying the\n                    // last bytes.\n                    length := sub(length, 32)\n                    let sEnd := add(source, length)\n                    let dEnd := add(dest, length)\n\n                    // Remember the last 32 bytes of source\n                    // This needs to be done here and not after the loop\n                    // because we may have overwritten the last bytes in\n                    // source already due to overlap.\n                    let last := mload(sEnd)\n\n                    // Copy whole words front to back\n                    // Note: the first check is always true,\n                    // this could have been a do-while loop.\n                    // solhint-disable-next-line no-empty-blocks\n                    for {} lt(source, sEnd) {} {\n                        mstore(dest, mload(source))\n                        source := add(source, 32)\n                        dest := add(dest, 32)\n                    }\n\n                    // Write the last 32 bytes\n                    mstore(dEnd, last)\n                }\n            } else {\n                assembly {\n                    // We subtract 32 from `sEnd` and `dEnd` because those\n                    // are the starting points when copying a word at the end.\n                    length := sub(length, 32)\n                    let sEnd := add(source, length)\n                    let dEnd := add(dest, length)\n\n                    // Remember the first 32 bytes of source\n                    // This needs to be done here and not after the loop\n                    // because we may have overwritten the first bytes in\n                    // source already due to overlap.\n                    let first := mload(source)\n\n                    // Copy whole words back to front\n                    // We use a signed comparisson here to allow dEnd to become\n                    // negative (happens when source and dest < 32). Valid\n                    // addresses in local memory will never be larger than\n                    // 2**255, so they can be safely re-interpreted as signed.\n                    // Note: the first check is always true,\n                    // this could have been a do-while loop.\n                    // solhint-disable-next-line no-empty-blocks\n                    for {} slt(dest, dEnd) {} {\n                        mstore(dEnd, mload(sEnd))\n                        sEnd := sub(sEnd, 32)\n                        dEnd := sub(dEnd, 32)\n                    }\n\n                    // Write the first 32 bytes\n                    mstore(dest, first)\n                }\n            }\n        }\n    }\n\n    /// @dev Returns a slices from a byte array.\n    /// @param b The byte array to take a slice from.\n    /// @param from The starting index for the slice (inclusive).\n    /// @param to The final index for the slice (exclusive).\n    /// @return result The slice containing bytes at indices [from, to)\n    function slice(\n        bytes memory b,\n        uint256 from,\n        uint256 to\n    )\n        internal\n        pure\n        returns (bytes memory result)\n    {\n        // Ensure that the from and to positions are valid positions for a slice within\n        // the byte array that is being used.\n        if (from > to) {\n            LibRichErrors.rrevert(LibBytesRichErrors.InvalidByteOperationError(\n                LibBytesRichErrors.InvalidByteOperationErrorCodes.FromLessThanOrEqualsToRequired,\n                from,\n                to\n            ));\n        }\n        if (to > b.length) {\n            LibRichErrors.rrevert(LibBytesRichErrors.InvalidByteOperationError(\n                LibBytesRichErrors.InvalidByteOperationErrorCodes.ToLessThanOrEqualsLengthRequired,\n                to,\n                b.length\n            ));\n        }\n\n        // Create a new bytes structure and copy contents\n        result = new bytes(to - from);\n        memCopy(\n            result.contentAddress(),\n            b.contentAddress() + from,\n            result.length\n        );\n        return result;\n    }\n\n    /// @dev Returns a slice from a byte array without preserving the input.\n    /// @param b The byte array to take a slice from. Will be destroyed in the process.\n    /// @param from The starting index for the slice (inclusive).\n    /// @param to The final index for the slice (exclusive).\n    /// @return result The slice containing bytes at indices [from, to)\n    /// @dev When `from == 0`, the original array will match the slice. In other cases its state will be corrupted.\n    function sliceDestructive(\n        bytes memory b,\n        uint256 from,\n        uint256 to\n    )\n        internal\n        pure\n        returns (bytes memory result)\n    {\n        // Ensure that the from and to positions are valid positions for a slice within\n        // the byte array that is being used.\n        if (from > to) {\n            LibRichErrors.rrevert(LibBytesRichErrors.InvalidByteOperationError(\n                LibBytesRichErrors.InvalidByteOperationErrorCodes.FromLessThanOrEqualsToRequired,\n                from,\n                to\n            ));\n        }\n        if (to > b.length) {\n            LibRichErrors.rrevert(LibBytesRichErrors.InvalidByteOperationError(\n                LibBytesRichErrors.InvalidByteOperationErrorCodes.ToLessThanOrEqualsLengthRequired,\n                to,\n                b.length\n            ));\n        }\n\n        // Create a new bytes structure around [from, to) in-place.\n        assembly {\n            result := add(b, from)\n            mstore(result, sub(to, from))\n        }\n        return result;\n    }\n\n    /// @dev Pops the last byte off of a byte array by modifying its length.\n    /// @param b Byte array that will be modified.\n    /// @return The byte that was popped off.\n    function popLastByte(bytes memory b)\n        internal\n        pure\n        returns (bytes1 result)\n    {\n        if (b.length == 0) {\n            LibRichErrors.rrevert(LibBytesRichErrors.InvalidByteOperationError(\n                LibBytesRichErrors.InvalidByteOperationErrorCodes.LengthGreaterThanZeroRequired,\n                b.length,\n                0\n            ));\n        }\n\n        // Store last byte.\n        result = b[b.length - 1];\n\n        assembly {\n            // Decrement length of byte array.\n            let newLen := sub(mload(b), 1)\n            mstore(b, newLen)\n        }\n        return result;\n    }\n\n    /// @dev Tests equality of two byte arrays.\n    /// @param lhs First byte array to compare.\n    /// @param rhs Second byte array to compare.\n    /// @return True if arrays are the same. False otherwise.\n    function equals(\n        bytes memory lhs,\n        bytes memory rhs\n    )\n        internal\n        pure\n        returns (bool equal)\n    {\n        // Keccak gas cost is 30 + numWords * 6. This is a cheap way to compare.\n        // We early exit on unequal lengths, but keccak would also correctly\n        // handle this.\n        return lhs.length == rhs.length && keccak256(lhs) == keccak256(rhs);\n    }\n\n    /// @dev Reads an address from a position in a byte array.\n    /// @param b Byte array containing an address.\n    /// @param index Index in byte array of address.\n    /// @return address from byte array.\n    function readAddress(\n        bytes memory b,\n        uint256 index\n    )\n        internal\n        pure\n        returns (address result)\n    {\n        if (b.length < index + 20) {\n            LibRichErrors.rrevert(LibBytesRichErrors.InvalidByteOperationError(\n                LibBytesRichErrors.InvalidByteOperationErrorCodes.LengthGreaterThanOrEqualsTwentyRequired,\n                b.length,\n                index + 20 // 20 is length of address\n            ));\n        }\n\n        // Add offset to index:\n        // 1. Arrays are prefixed by 32-byte length parameter (add 32 to index)\n        // 2. Account for size difference between address length and 32-byte storage word (subtract 12 from index)\n        index += 20;\n\n        // Read address from array memory\n        assembly {\n            // 1. Add index to address of bytes array\n            // 2. Load 32-byte word from memory\n            // 3. Apply 20-byte mask to obtain address\n            result := and(mload(add(b, index)), 0xffffffffffffffffffffffffffffffffffffffff)\n        }\n        return result;\n    }\n\n    /// @dev Writes an address into a specific position in a byte array.\n    /// @param b Byte array to insert address into.\n    /// @param index Index in byte array of address.\n    /// @param input Address to put into byte array.\n    function writeAddress(\n        bytes memory b,\n        uint256 index,\n        address input\n    )\n        internal\n        pure\n    {\n        if (b.length < index + 20) {\n            LibRichErrors.rrevert(LibBytesRichErrors.InvalidByteOperationError(\n                LibBytesRichErrors.InvalidByteOperationErrorCodes.LengthGreaterThanOrEqualsTwentyRequired,\n                b.length,\n                index + 20 // 20 is length of address\n            ));\n        }\n\n        // Add offset to index:\n        // 1. Arrays are prefixed by 32-byte length parameter (add 32 to index)\n        // 2. Account for size difference between address length and 32-byte storage word (subtract 12 from index)\n        index += 20;\n\n        // Store address into array memory\n        assembly {\n            // The address occupies 20 bytes and mstore stores 32 bytes.\n            // First fetch the 32-byte word where we'll be storing the address, then\n            // apply a mask so we have only the bytes in the word that the address will not occupy.\n            // Then combine these bytes with the address and store the 32 bytes back to memory with mstore.\n\n            // 1. Add index to address of bytes array\n            // 2. Load 32-byte word from memory\n            // 3. Apply 12-byte mask to obtain extra bytes occupying word of memory where we'll store the address\n            let neighbors := and(\n                mload(add(b, index)),\n                0xffffffffffffffffffffffff0000000000000000000000000000000000000000\n            )\n\n            // Make sure input address is clean.\n            // (Solidity does not guarantee this)\n            input := and(input, 0xffffffffffffffffffffffffffffffffffffffff)\n\n            // Store the neighbors and address into memory\n            mstore(add(b, index), xor(input, neighbors))\n        }\n    }\n\n    /// @dev Reads a bytes32 value from a position in a byte array.\n    /// @param b Byte array containing a bytes32 value.\n    /// @param index Index in byte array of bytes32 value.\n    /// @return bytes32 value from byte array.\n    function readBytes32(\n        bytes memory b,\n        uint256 index\n    )\n        internal\n        pure\n        returns (bytes32 result)\n    {\n        if (b.length < index + 32) {\n            LibRichErrors.rrevert(LibBytesRichErrors.InvalidByteOperationError(\n                LibBytesRichErrors.InvalidByteOperationErrorCodes.LengthGreaterThanOrEqualsThirtyTwoRequired,\n                b.length,\n                index + 32\n            ));\n        }\n\n        // Arrays are prefixed by a 256 bit length parameter\n        index += 32;\n\n        // Read the bytes32 from array memory\n        assembly {\n            result := mload(add(b, index))\n        }\n        return result;\n    }\n\n    /// @dev Writes a bytes32 into a specific position in a byte array.\n    /// @param b Byte array to insert <input> into.\n    /// @param index Index in byte array of <input>.\n    /// @param input bytes32 to put into byte array.\n    function writeBytes32(\n        bytes memory b,\n        uint256 index,\n        bytes32 input\n    )\n        internal\n        pure\n    {\n        if (b.length < index + 32) {\n            LibRichErrors.rrevert(LibBytesRichErrors.InvalidByteOperationError(\n                LibBytesRichErrors.InvalidByteOperationErrorCodes.LengthGreaterThanOrEqualsThirtyTwoRequired,\n                b.length,\n                index + 32\n            ));\n        }\n\n        // Arrays are prefixed by a 256 bit length parameter\n        index += 32;\n\n        // Read the bytes32 from array memory\n        assembly {\n            mstore(add(b, index), input)\n        }\n    }\n\n    /// @dev Reads a uint256 value from a position in a byte array.\n    /// @param b Byte array containing a uint256 value.\n    /// @param index Index in byte array of uint256 value.\n    /// @return uint256 value from byte array.\n    function readUint256(\n        bytes memory b,\n        uint256 index\n    )\n        internal\n        pure\n        returns (uint256 result)\n    {\n        result = uint256(readBytes32(b, index));\n        return result;\n    }\n\n    /// @dev Writes a uint256 into a specific position in a byte array.\n    /// @param b Byte array to insert <input> into.\n    /// @param index Index in byte array of <input>.\n    /// @param input uint256 to put into byte array.\n    function writeUint256(\n        bytes memory b,\n        uint256 index,\n        uint256 input\n    )\n        internal\n        pure\n    {\n        writeBytes32(b, index, bytes32(input));\n    }\n\n    /// @dev Reads an unpadded bytes4 value from a position in a byte array.\n    /// @param b Byte array containing a bytes4 value.\n    /// @param index Index in byte array of bytes4 value.\n    /// @return bytes4 value from byte array.\n    function readBytes4(\n        bytes memory b,\n        uint256 index\n    )\n        internal\n        pure\n        returns (bytes4 result)\n    {\n        if (b.length < index + 4) {\n            LibRichErrors.rrevert(LibBytesRichErrors.InvalidByteOperationError(\n                LibBytesRichErrors.InvalidByteOperationErrorCodes.LengthGreaterThanOrEqualsFourRequired,\n                b.length,\n                index + 4\n            ));\n        }\n\n        // Arrays are prefixed by a 32 byte length field\n        index += 32;\n\n        // Read the bytes4 from array memory\n        assembly {\n            result := mload(add(b, index))\n            // Solidity does not require us to clean the trailing bytes.\n            // We do it anyway\n            result := and(result, 0xFFFFFFFF00000000000000000000000000000000000000000000000000000000)\n        }\n        return result;\n    }\n\n    /// @dev Writes a new length to a byte array.\n    ///      Decreasing length will lead to removing the corresponding lower order bytes from the byte array.\n    ///      Increasing length may lead to appending adjacent in-memory bytes to the end of the byte array.\n    /// @param b Bytes array to write new length to.\n    /// @param length New length of byte array.\n    function writeLength(bytes memory b, uint256 length)\n        internal\n        pure\n    {\n        assembly {\n            mstore(b, length)\n        }\n    }\n}\n",
        "@0x/contracts-utils/contracts/src/LibBytesRichErrors.sol": "/*\n\n  Copyright 2019 ZeroEx Intl.\n\n  Licensed under the Apache License, Version 2.0 (the \"License\");\n  you may not use this file except in compliance with the License.\n  You may obtain a copy of the License at\n\n    http://www.apache.org/licenses/LICENSE-2.0\n\n  Unless required by applicable law or agreed to in writing, software\n  distributed under the License is distributed on an \"AS IS\" BASIS,\n  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n  See the License for the specific language governing permissions and\n  limitations under the License.\n\n*/\n\npragma solidity ^0.5.9;\n\n\nlibrary LibBytesRichErrors {\n\n    enum InvalidByteOperationErrorCodes {\n        FromLessThanOrEqualsToRequired,\n        ToLessThanOrEqualsLengthRequired,\n        LengthGreaterThanZeroRequired,\n        LengthGreaterThanOrEqualsFourRequired,\n        LengthGreaterThanOrEqualsTwentyRequired,\n        LengthGreaterThanOrEqualsThirtyTwoRequired,\n        LengthGreaterThanOrEqualsNestedBytesLengthRequired,\n        DestinationLengthGreaterThanOrEqualSourceLengthRequired\n    }\n\n    // bytes4(keccak256(\"InvalidByteOperationError(uint8,uint256,uint256)\"))\n    bytes4 internal constant INVALID_BYTE_OPERATION_ERROR_SELECTOR =\n        0x28006595;\n\n    // solhint-disable func-name-mixedcase\n    function InvalidByteOperationError(\n        InvalidByteOperationErrorCodes errorCode,\n        uint256 offset,\n        uint256 required\n    )\n        internal\n        pure\n        returns (bytes memory)\n    {\n        return abi.encodeWithSelector(\n            INVALID_BYTE_OPERATION_ERROR_SELECTOR,\n            errorCode,\n            offset,\n            required\n        );\n    }\n}\n",
        "@0x/contracts-exchange-libs/contracts/src/IWallet.sol": "/*\n\n  Copyright 2019 ZeroEx Intl.\n\n  Licensed under the Apache License, Version 2.0 (the \"License\");\n  you may not use this file except in compliance with the License.\n  You may obtain a copy of the License at\n\n    http://www.apache.org/licenses/LICENSE-2.0\n\n  Unless required by applicable law or agreed to in writing, software\n  distributed under the License is distributed on an \"AS IS\" BASIS,\n  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n  See the License for the specific language governing permissions and\n  limitations under the License.\n\n*/\n\npragma solidity ^0.5.9;\npragma experimental ABIEncoderV2;\n\n\ncontract IWallet {\n\n    bytes4 internal constant LEGACY_WALLET_MAGIC_VALUE = 0xb0671381;\n\n    /// @dev Validates a hash with the `Wallet` signature type.\n    /// @param hash Message hash that is signed.\n    /// @param signature Proof of signing.\n    /// @return magicValue `bytes4(0xb0671381)` if the signature check succeeds.\n    function isValidSignature(\n        bytes32 hash,\n        bytes calldata signature\n    )\n        external\n        view\n        returns (bytes4 magicValue);\n}\n",
        "@0x/contracts-utils/contracts/src/DeploymentConstants.sol": "/*\n\n  Copyright 2020 ZeroEx Intl.\n\n  Licensed under the Apache License, Version 2.0 (the \"License\");\n  you may not use this file except in compliance with the License.\n  You may obtain a copy of the License at\n\n    http://www.apache.org/licenses/LICENSE-2.0\n\n  Unless required by applicable law or agreed to in writing, software\n  distributed under the License is distributed on an \"AS IS\" BASIS,\n  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n  See the License for the specific language governing permissions and\n  limitations under the License.\n\n*/\n\npragma solidity ^0.5.9;\n\n\ncontract DeploymentConstants {\n\n    // solhint-disable separate-by-one-line-in-contract\n\n    // Mainnet addresses ///////////////////////////////////////////////////////\n    /// @dev Mainnet address of the WETH contract.\n    address constant private WETH_ADDRESS = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;\n    /// @dev Mainnet address of the KyberNetworkProxy contract.\n    address constant private KYBER_NETWORK_PROXY_ADDRESS = 0x9AAb3f75489902f3a48495025729a0AF77d4b11e;\n    /// @dev Mainnet address of the KyberHintHandler contract.\n    address constant private KYBER_HINT_HANDLER_ADDRESS = 0xa1C0Fa73c39CFBcC11ec9Eb1Afc665aba9996E2C;\n    /// @dev Mainnet address of the `UniswapExchangeFactory` contract.\n    address constant private UNISWAP_EXCHANGE_FACTORY_ADDRESS = 0xc0a47dFe034B400B47bDaD5FecDa2621de6c4d95;\n    /// @dev Mainnet address of the `UniswapV2Router01` contract.\n    address constant private UNISWAP_V2_ROUTER_01_ADDRESS = 0xf164fC0Ec4E93095b804a4795bBe1e041497b92a;\n    /// @dev Mainnet address of the Eth2Dai `MatchingMarket` contract.\n    address constant private ETH2DAI_ADDRESS = 0x794e6e91555438aFc3ccF1c5076A74F42133d08D;\n    /// @dev Mainnet address of the `ERC20BridgeProxy` contract\n    address constant private ERC20_BRIDGE_PROXY_ADDRESS = 0x8ED95d1746bf1E4dAb58d8ED4724f1Ef95B20Db0;\n    ///@dev Mainnet address of the `Dai` (multi-collateral) contract\n    address constant private DAI_ADDRESS = 0x6B175474E89094C44Da98b954EedeAC495271d0F;\n    /// @dev Mainnet address of the `Chai` contract\n    address constant private CHAI_ADDRESS = 0x06AF07097C9Eeb7fD685c692751D5C66dB49c215;\n    /// @dev Mainnet address of the 0x DevUtils contract.\n    address constant private DEV_UTILS_ADDRESS = 0x74134CF88b21383713E096a5ecF59e297dc7f547;\n    /// @dev Kyber ETH pseudo-address.\n    address constant internal KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;\n    /// @dev Mainnet address of the dYdX contract.\n    address constant private DYDX_ADDRESS = 0x1E0447b19BB6EcFdAe1e4AE1694b0C3659614e4e;\n    /// @dev Mainnet address of the GST2 contract\n    address constant private GST_ADDRESS = 0x0000000000b3F879cb30FE243b4Dfee438691c04;\n    /// @dev Mainnet address of the GST Collector\n    address constant private GST_COLLECTOR_ADDRESS = 0x000000D3b08566BE75A6DB803C03C85C0c1c5B96;\n    /// @dev Mainnet address of the mStable mUSD contract.\n    address constant private MUSD_ADDRESS = 0xe2f2a5C287993345a840Db3B0845fbC70f5935a5;\n    /// @dev Mainnet address of the Mooniswap Registry contract\n    address constant private MOONISWAP_REGISTRY = 0x71CD6666064C3A1354a3B4dca5fA1E2D3ee7D303;\n    /// @dev Mainnet address of the DODO Registry (ZOO) contract\n    address constant private DODO_REGISTRY = 0x3A97247DF274a17C59A3bd12735ea3FcDFb49950;\n    /// @dev Mainnet address of the DODO Helper contract\n    address constant private DODO_HELPER = 0x533dA777aeDCE766CEAe696bf90f8541A4bA80Eb;\n\n    // // Ropsten addresses ///////////////////////////////////////////////////////\n    // /// @dev Mainnet address of the WETH contract.\n    // address constant private WETH_ADDRESS = 0xc778417E063141139Fce010982780140Aa0cD5Ab;\n    // /// @dev Mainnet address of the KyberNetworkProxy contract.\n    // address constant private KYBER_NETWORK_PROXY_ADDRESS = 0xd719c34261e099Fdb33030ac8909d5788D3039C4;\n    // /// @dev Mainnet address of the `UniswapExchangeFactory` contract.\n    // address constant private UNISWAP_EXCHANGE_FACTORY_ADDRESS = 0x9c83dCE8CA20E9aAF9D3efc003b2ea62aBC08351;\n    // /// @dev Mainnet address of the `UniswapV2Router01` contract.\n    // address constant private UNISWAP_V2_ROUTER_01_ADDRESS = 0xf164fC0Ec4E93095b804a4795bBe1e041497b92a;\n    // /// @dev Mainnet address of the Eth2Dai `MatchingMarket` contract.\n    // address constant private ETH2DAI_ADDRESS = address(0);\n    // /// @dev Mainnet address of the `ERC20BridgeProxy` contract\n    // address constant private ERC20_BRIDGE_PROXY_ADDRESS = 0xb344afeD348de15eb4a9e180205A2B0739628339;\n    // ///@dev Mainnet address of the `Dai` (multi-collateral) contract\n    // address constant private DAI_ADDRESS = address(0);\n    // /// @dev Mainnet address of the `Chai` contract\n    // address constant private CHAI_ADDRESS = address(0);\n    // /// @dev Mainnet address of the 0x DevUtils contract.\n    // address constant private DEV_UTILS_ADDRESS = 0xC812AF3f3fBC62F76ea4262576EC0f49dB8B7f1c;\n    // /// @dev Kyber ETH pseudo-address.\n    // address constant internal KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;\n    // /// @dev Mainnet address of the dYdX contract.\n    // address constant private DYDX_ADDRESS = address(0);\n    // /// @dev Mainnet address of the GST2 contract\n    // address constant private GST_ADDRESS = address(0);\n    // /// @dev Mainnet address of the GST Collector\n    // address constant private GST_COLLECTOR_ADDRESS = address(0);\n    // /// @dev Mainnet address of the mStable mUSD contract.\n    // address constant private MUSD_ADDRESS = 0x4E1000616990D83e56f4b5fC6CC8602DcfD20459;\n\n    // // Rinkeby addresses ///////////////////////////////////////////////////////\n    // /// @dev Mainnet address of the WETH contract.\n    // address constant private WETH_ADDRESS = 0xc778417E063141139Fce010982780140Aa0cD5Ab;\n    // /// @dev Mainnet address of the KyberNetworkProxy contract.\n    // address constant private KYBER_NETWORK_PROXY_ADDRESS = 0x0d5371e5EE23dec7DF251A8957279629aa79E9C5;\n    // /// @dev Mainnet address of the `UniswapExchangeFactory` contract.\n    // address constant private UNISWAP_EXCHANGE_FACTORY_ADDRESS = 0xf5D915570BC477f9B8D6C0E980aA81757A3AaC36;\n    // /// @dev Mainnet address of the `UniswapV2Router01` contract.\n    // address constant private UNISWAP_V2_ROUTER_01_ADDRESS = 0xf164fC0Ec4E93095b804a4795bBe1e041497b92a;\n    // /// @dev Mainnet address of the Eth2Dai `MatchingMarket` contract.\n    // address constant private ETH2DAI_ADDRESS = address(0);\n    // /// @dev Mainnet address of the `ERC20BridgeProxy` contract\n    // address constant private ERC20_BRIDGE_PROXY_ADDRESS = 0xA2AA4bEFED748Fba27a3bE7Dfd2C4b2c6DB1F49B;\n    // ///@dev Mainnet address of the `Dai` (multi-collateral) contract\n    // address constant private DAI_ADDRESS = address(0);\n    // /// @dev Mainnet address of the `Chai` contract\n    // address constant private CHAI_ADDRESS = address(0);\n    // /// @dev Mainnet address of the 0x DevUtils contract.\n    // address constant private DEV_UTILS_ADDRESS = 0x46B5BC959e8A754c0256FFF73bF34A52Ad5CdfA9;\n    // /// @dev Kyber ETH pseudo-address.\n    // address constant internal KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;\n    // /// @dev Mainnet address of the dYdX contract.\n    // address constant private DYDX_ADDRESS = address(0);\n    // /// @dev Mainnet address of the GST2 contract\n    // address constant private GST_ADDRESS = address(0);\n    // /// @dev Mainnet address of the GST Collector\n    // address constant private GST_COLLECTOR_ADDRESS = address(0);\n    // /// @dev Mainnet address of the mStable mUSD contract.\n    // address constant private MUSD_ADDRESS = address(0);\n\n    // // Kovan addresses /////////////////////////////////////////////////////////\n    // /// @dev Kovan address of the WETH contract.\n    // address constant private WETH_ADDRESS = 0xd0A1E359811322d97991E03f863a0C30C2cF029C;\n    // /// @dev Kovan address of the KyberNetworkProxy contract.\n    // address constant private KYBER_NETWORK_PROXY_ADDRESS = 0x692f391bCc85cefCe8C237C01e1f636BbD70EA4D;\n    // /// @dev Kovan address of the `UniswapExchangeFactory` contract.\n    // address constant private UNISWAP_EXCHANGE_FACTORY_ADDRESS = 0xD3E51Ef092B2845f10401a0159B2B96e8B6c3D30;\n    // /// @dev Kovan address of the `UniswapV2Router01` contract.\n    // address constant private UNISWAP_V2_ROUTER_01_ADDRESS = 0xf164fC0Ec4E93095b804a4795bBe1e041497b92a;\n    // /// @dev Kovan address of the Eth2Dai `MatchingMarket` contract.\n    // address constant private ETH2DAI_ADDRESS = 0xe325acB9765b02b8b418199bf9650972299235F4;\n    // /// @dev Kovan address of the `ERC20BridgeProxy` contract\n    // address constant private ERC20_BRIDGE_PROXY_ADDRESS = 0x3577552C1Fb7A44aD76BeEB7aB53251668A21F8D;\n    // /// @dev Kovan address of the `Chai` contract\n    // address constant private CHAI_ADDRESS = address(0);\n    // /// @dev Kovan address of the `Dai` (multi-collateral) contract\n    // address constant private DAI_ADDRESS = 0x4F96Fe3b7A6Cf9725f59d353F723c1bDb64CA6Aa;\n    // /// @dev Kovan address of the 0x DevUtils contract.\n    // address constant private DEV_UTILS_ADDRESS = 0x9402639A828BdF4E9e4103ac3B69E1a6E522eB59;\n    // /// @dev Kyber ETH pseudo-address.\n    // address constant internal KYBER_ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;\n    // /// @dev Kovan address of the dYdX contract.\n    // address constant private DYDX_ADDRESS = address(0);\n    // /// @dev Kovan address of the GST2 contract\n    // address constant private GST_ADDRESS = address(0);\n    // /// @dev Kovan address of the GST Collector\n    // address constant private GST_COLLECTOR_ADDRESS = address(0);\n    // /// @dev Mainnet address of the mStable mUSD contract.\n    // address constant private MUSD_ADDRESS = address(0);\n\n    /// @dev Overridable way to get the `KyberNetworkProxy` address.\n    /// @return kyberAddress The `IKyberNetworkProxy` address.\n    function _getKyberNetworkProxyAddress()\n        internal\n        view\n        returns (address kyberAddress)\n    {\n        return KYBER_NETWORK_PROXY_ADDRESS;\n    }\n\n    /// @dev Overridable way to get the `KyberHintHandler` address.\n    /// @return kyberAddress The `IKyberHintHandler` address.\n    function _getKyberHintHandlerAddress()\n        internal\n        view\n        returns (address hintHandlerAddress)\n    {\n        return KYBER_HINT_HANDLER_ADDRESS;\n    }\n\n    /// @dev Overridable way to get the WETH address.\n    /// @return wethAddress The WETH address.\n    function _getWethAddress()\n        internal\n        view\n        returns (address wethAddress)\n    {\n        return WETH_ADDRESS;\n    }\n\n    /// @dev Overridable way to get the `UniswapExchangeFactory` address.\n    /// @return uniswapAddress The `UniswapExchangeFactory` address.\n    function _getUniswapExchangeFactoryAddress()\n        internal\n        view\n        returns (address uniswapAddress)\n    {\n        return UNISWAP_EXCHANGE_FACTORY_ADDRESS;\n    }\n\n    /// @dev Overridable way to get the `UniswapV2Router01` address.\n    /// @return uniswapRouterAddress The `UniswapV2Router01` address.\n    function _getUniswapV2Router01Address()\n        internal\n        view\n        returns (address uniswapRouterAddress)\n    {\n        return UNISWAP_V2_ROUTER_01_ADDRESS;\n    }\n\n    /// @dev An overridable way to retrieve the Eth2Dai `MatchingMarket` contract.\n    /// @return eth2daiAddress The Eth2Dai `MatchingMarket` contract.\n    function _getEth2DaiAddress()\n        internal\n        view\n        returns (address eth2daiAddress)\n    {\n        return ETH2DAI_ADDRESS;\n    }\n\n    /// @dev An overridable way to retrieve the `ERC20BridgeProxy` contract.\n    /// @return erc20BridgeProxyAddress The `ERC20BridgeProxy` contract.\n    function _getERC20BridgeProxyAddress()\n        internal\n        view\n        returns (address erc20BridgeProxyAddress)\n    {\n        return ERC20_BRIDGE_PROXY_ADDRESS;\n    }\n\n    /// @dev An overridable way to retrieve the `Dai` contract.\n    /// @return daiAddress The `Dai` contract.\n    function _getDaiAddress()\n        internal\n        view\n        returns (address daiAddress)\n    {\n        return DAI_ADDRESS;\n    }\n\n    /// @dev An overridable way to retrieve the `Chai` contract.\n    /// @return chaiAddress The `Chai` contract.\n    function _getChaiAddress()\n        internal\n        view\n        returns (address chaiAddress)\n    {\n        return CHAI_ADDRESS;\n    }\n\n    /// @dev An overridable way to retrieve the 0x `DevUtils` contract address.\n    /// @return devUtils The 0x `DevUtils` contract address.\n    function _getDevUtilsAddress()\n        internal\n        view\n        returns (address devUtils)\n    {\n        return DEV_UTILS_ADDRESS;\n    }\n\n    /// @dev Overridable way to get the DyDx contract.\n    /// @return exchange The DyDx exchange contract.\n    function _getDydxAddress()\n        internal\n        view\n        returns (address dydxAddress)\n    {\n        return DYDX_ADDRESS;\n    }\n\n    /// @dev An overridable way to retrieve the GST2 contract address.\n    /// @return gst The GST contract.\n    function _getGstAddress()\n        internal\n        view\n        returns (address gst)\n    {\n        return GST_ADDRESS;\n    }\n\n    /// @dev An overridable way to retrieve the GST Collector address.\n    /// @return collector The GST collector address.\n    function _getGstCollectorAddress()\n        internal\n        view\n        returns (address collector)\n    {\n        return GST_COLLECTOR_ADDRESS;\n    }\n\n    /// @dev An overridable way to retrieve the mStable mUSD address.\n    /// @return musd The mStable mUSD address.\n    function _getMUsdAddress()\n        internal\n        view\n        returns (address musd)\n    {\n        return MUSD_ADDRESS;\n    }\n\n    /// @dev An overridable way to retrieve the Mooniswap registry address.\n    /// @return registry The Mooniswap registry address.\n    function _getMooniswapAddress()\n        internal\n        view\n        returns (address)\n    {\n        return MOONISWAP_REGISTRY;\n    }\n\n    /// @dev An overridable way to retrieve the DODO Registry contract address.\n    /// @return registry The DODO Registry contract address.\n    function _getDODORegistryAddress()\n        internal\n        view\n        returns (address)\n    {\n        return DODO_REGISTRY;\n    }\n\n    /// @dev An overridable way to retrieve the DODO Helper contract address.\n    /// @return registry The DODO Helper contract address.\n    function _getDODOHelperAddress()\n        internal\n        view\n        returns (address)\n    {\n        return DODO_HELPER;\n    }\n}\n",
        "../interfaces/IERC20Bridge.sol": "/*\n\n  Copyright 2019 ZeroEx Intl.\n\n  Licensed under the Apache License, Version 2.0 (the \"License\");\n  you may not use this file except in compliance with the License.\n  You may obtain a copy of the License at\n\n    http://www.apache.org/licenses/LICENSE-2.0\n\n  Unless required by applicable law or agreed to in writing, software\n  distributed under the License is distributed on an \"AS IS\" BASIS,\n  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n  See the License for the specific language governing permissions and\n  limitations under the License.\n\n*/\n\npragma solidity ^0.5.9;\n\n\ncontract IERC20Bridge {\n\n    /// @dev Result of a successful bridge call.\n    bytes4 constant internal BRIDGE_SUCCESS = 0xdc1600f3;\n\n    /// @dev Emitted when a trade occurs.\n    /// @param inputToken The token the bridge is converting from.\n    /// @param outputToken The token the bridge is converting to.\n    /// @param inputTokenAmount Amount of input token.\n    /// @param outputTokenAmount Amount of output token.\n    /// @param from The `from` address in `bridgeTransferFrom()`\n    /// @param to The `to` address in `bridgeTransferFrom()`\n    event ERC20BridgeTransfer(\n        address inputToken,\n        address outputToken,\n        uint256 inputTokenAmount,\n        uint256 outputTokenAmount,\n        address from,\n        address to\n    );\n\n    /// @dev Transfers `amount` of the ERC20 `tokenAddress` from `from` to `to`.\n    /// @param tokenAddress The address of the ERC20 token to transfer.\n    /// @param from Address to transfer asset from.\n    /// @param to Address to transfer asset to.\n    /// @param amount Amount of asset to transfer.\n    /// @param bridgeData Arbitrary asset data needed by the bridge contract.\n    /// @return success The magic bytes `0xdc1600f3` if successful.\n    function bridgeTransferFrom(\n        address tokenAddress,\n        address from,\n        address to,\n        uint256 amount,\n        bytes calldata bridgeData\n    )\n        external\n        returns (bytes4 success);\n}\n",
        "../interfaces/IShell.sol": "/*\n\n  Copyright 2020 ZeroEx Intl.\n\n  Licensed under the Apache License, Version 2.0 (the \"License\");\n  you may not use this file except in compliance with the License.\n  You may obtain a copy of the License at\n\n    http://www.apache.org/licenses/LICENSE-2.0\n\n  Unless required by applicable law or agreed to in writing, software\n  distributed under the License is distributed on an \"AS IS\" BASIS,\n  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n  See the License for the specific language governing permissions and\n  limitations under the License.\n\n*/\n\npragma solidity ^0.5.9;\n\n\ninterface IShell {\n\n    function originSwap(\n        address from,\n        address to,\n        uint256 fromAmount,\n        uint256 minTargetAmount,\n        uint256 deadline\n    )\n        external\n        returns (uint256 toAmount);\n}\n\n"
    },
    "compiler": {
        "name": "solc",
        "version": "0.5.17+commit.d19bba13",
        "settings": {
            "remappings": [
                "@0x/contracts-utils=/home/runner/work/protocol/protocol/contracts/asset-proxy/node_modules/@0x/contracts-utils",
                "@0x/contracts-erc1155=/home/runner/work/protocol/protocol/contracts/asset-proxy/node_modules/@0x/contracts-erc1155",
                "@0x/contracts-erc20=/home/runner/work/protocol/protocol/contracts/asset-proxy/node_modules/@0x/contracts-erc20",
                "@0x/contracts-exchange-libs=/home/runner/work/protocol/protocol/contracts/asset-proxy/node_modules/@0x/contracts-exchange-libs"
            ],
            "optimizer": {
                "enabled": true,
                "runs": 1000000,
                "details": {
                    "yul": true,
                    "deduplicate": true,
                    "cse": true,
                    "constantOptimizer": true
                }
            },
            "outputSelection": {
                "*": {
                    "*": [
                        "abi",
                        "devdoc",
                        "evm.bytecode.object",
                        "evm.bytecode.sourceMap",
                        "evm.deployedBytecode.object",
                        "evm.deployedBytecode.sourceMap"
                    ]
                }
            },
            "evmVersion": "istanbul"
        }
    },
    "chains": {}
}