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  "source": "/*\n\n    Copyright 2019 dYdX Trading Inc.\n    Copyright 2020 Kollateral LLC.\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\n// SPDX-License-Identifier: Apache-2.0\npragma solidity ^0.7.0;\n\nlibrary Types {\n    enum ActionType {\n        Deposit, // supply tokens\n        Withdraw, // borrow tokens\n        Transfer, // transfer balance between accounts\n        Buy, // buy an amount of some token (externally)\n        Sell, // sell an amount of some token (externally)\n        Trade, // trade tokens against another account\n        Liquidate, // liquidate an undercollateralized or expiring account\n        Vaporize, // use excess tokens to zero-out a completely negative account\n        Call // send arbitrary data to an address\n    }\n\n    enum AssetDenomination {\n        Wei, // the amount is denominated in wei\n        Par // the amount is denominated in par\n    }\n\n    enum AssetReference {\n        Delta, // the amount is given as a delta from the current value\n        Target // the amount is given as an exact number to end up at\n    }\n\n    struct AssetAmount {\n        bool sign; // true if positive\n        AssetDenomination denomination;\n        AssetReference ref;\n        uint256 value;\n    }\n\n    struct Wei {\n        bool sign; // true if positive\n        uint256 value;\n    }\n\n    struct ActionArgs {\n        ActionType actionType;\n        uint256 accountId;\n        AssetAmount amount;\n        uint256 primaryMarketId;\n        uint256 secondaryMarketId;\n        address otherAddress;\n        uint256 otherAccountId;\n        bytes data;\n    }\n\n    struct AccountInfo {\n        address owner; // The address that owns the account\n        uint256 number; // A nonce that allows a single address to control many accounts\n    }\n}\n",
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