{"id":"c696cc9240eecc952557b0c73b04483f","_format":"hh-sol-build-info-1","solcVersion":"0.7.6","solcLongVersion":"0.7.6+commit.7338295f","input":{"language":"Solidity","sources":{"contracts/libs/IERC20.sol":{"content":"// SPDX-License-Identifier: MIT\r\n// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)\r\n\r\npragma solidity 0.7.6;\r\n\r\n/**\r\n * @dev Interface of the ERC20 standard as defined in the EIP.\r\n */\r\ninterface IERC20 {\r\n    /**\r\n     * @dev Emitted when `value` tokens are moved from one account (`from`) to\r\n     * another (`to`).\r\n     *\r\n     * Note that `value` may be zero.\r\n     */\r\n    event Transfer(address indexed from, address indexed to, uint256 value);\r\n\r\n    /**\r\n     * @dev Emitted when the allowance of a `spender` for an `owner` is set by\r\n     * a call to {approve}. `value` is the new allowance.\r\n     */\r\n    event Approval(address indexed owner, address indexed spender, uint256 value);\r\n\r\n    /**\r\n     * @dev Returns the amount of tokens in existence.\r\n     */\r\n    function totalSupply() external view returns (uint256);\r\n\r\n    /**\r\n     * @dev Returns the amount of tokens owned by `account`.\r\n     */\r\n    function balanceOf(address account) external view returns (uint256);\r\n\r\n    /**\r\n     * @dev Moves `amount` tokens from the caller's account to `to`.\r\n     *\r\n     * Returns a boolean value indicating whether the operation succeeded.\r\n     *\r\n     * Emits a {Transfer} event.\r\n     */\r\n    function transfer(address to, uint256 amount) external returns (bool);\r\n\r\n    /**\r\n     * @dev Returns the remaining number of tokens that `spender` will be\r\n     * allowed to spend on behalf of `owner` through {transferFrom}. This is\r\n     * zero by default.\r\n     *\r\n     * This value changes when {approve} or {transferFrom} are called.\r\n     */\r\n    function allowance(address owner, address spender) external view returns (uint256);\r\n\r\n    /**\r\n     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\r\n     *\r\n     * Returns a boolean value indicating whether the operation succeeded.\r\n     *\r\n     * IMPORTANT: Beware that changing an allowance with this method brings the risk\r\n     * that someone may use both the old and the new allowance by unfortunate\r\n     * transaction ordering. One possible solution to mitigate this race\r\n     * condition is to first reduce the spender's allowance to 0 and set the\r\n     * desired value afterwards:\r\n     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\r\n     *\r\n     * Emits an {Approval} event.\r\n     */\r\n    function approve(address spender, uint256 amount) external returns (bool);\r\n\r\n    /**\r\n     * @dev Moves `amount` tokens from `from` to `to` using the\r\n     * allowance mechanism. `amount` is then deducted from the caller's\r\n     * allowance.\r\n     *\r\n     * Returns a boolean value indicating whether the operation succeeded.\r\n     *\r\n     * Emits a {Transfer} event.\r\n     */\r\n    function transferFrom(address from, address to, uint256 amount) external returns (bool);\r\n}\r\n"},"contracts/libs/ReentrancyGuard.sol":{"content":"// SPDX-License-Identifier: MIT\r\n// OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)\r\n\r\npragma solidity 0.7.6;\r\n\r\n/**\r\n * @dev Contract module that helps prevent reentrant calls to a function.\r\n *\r\n * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier\r\n * available, which can be applied to functions to make sure there are no nested\r\n * (reentrant) calls to them.\r\n *\r\n * Note that because there is a single `nonReentrant` guard, functions marked as\r\n * `nonReentrant` may not call one another. This can be worked around by making\r\n * those functions `private`, and then adding `external` `nonReentrant` entry\r\n * points to them.\r\n *\r\n * TIP: If you would like to learn more about reentrancy and alternative ways\r\n * to protect against it, check out our blog post\r\n * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].\r\n */\r\nabstract contract ReentrancyGuard {\r\n    // Booleans are more expensive than uint256 or any type that takes up a full\r\n    // word because each write operation emits an extra SLOAD to first read the\r\n    // slot's contents, replace the bits taken up by the boolean, and then write\r\n    // back. This is the compiler's defense against contract upgrades and\r\n    // pointer aliasing, and it cannot be disabled.\r\n\r\n    // The values being non-zero value makes deployment a bit more expensive,\r\n    // but in exchange the refund on every call to nonReentrant will be lower in\r\n    // amount. Since refunds are capped to a percentage of the total\r\n    // transaction's gas, it is best to keep them low in cases like this one, to\r\n    // increase the likelihood of the full refund coming into effect.\r\n    uint256 private constant _NOT_ENTERED = 1;\r\n    uint256 private constant _ENTERED = 2;\r\n\r\n    uint256 private _status;\r\n\r\n    constructor() {\r\n        _status = _NOT_ENTERED;\r\n    }\r\n\r\n    /**\r\n     * @dev Prevents a contract from calling itself, directly or indirectly.\r\n     * Calling a `nonReentrant` function from another `nonReentrant`\r\n     * function is not supported. It is possible to prevent this from happening\r\n     * by making the `nonReentrant` function external, and making it call a\r\n     * `private` function that does the actual work.\r\n     */\r\n    modifier nonReentrant() {\r\n        _nonReentrantBefore();\r\n        _;\r\n        _nonReentrantAfter();\r\n    }\r\n\r\n    function _nonReentrantBefore() private {\r\n        // On the first call to nonReentrant, _status will be _NOT_ENTERED\r\n        require(_status != _ENTERED, 'ReentrancyGuard: reentrant call');\r\n\r\n        // Any calls to nonReentrant after this point will fail\r\n        _status = _ENTERED;\r\n    }\r\n\r\n    function _nonReentrantAfter() private {\r\n        // By storing the original value once again, a refund is triggered (see\r\n        // https://eips.ethereum.org/EIPS/eip-2200)\r\n        _status = _NOT_ENTERED;\r\n    }\r\n\r\n    /**\r\n     * @dev Returns true if the reentrancy guard is currently set to \"entered\", which indicates there is a\r\n     * `nonReentrant` function in the call stack.\r\n     */\r\n    function _reentrancyGuardEntered() internal view returns (bool) {\r\n        return _status == _ENTERED;\r\n    }\r\n}\r\n"}},"settings":{"optimizer":{"enabled":false,"runs":200},"outputSelection":{"*":{"*":["abi","evm.bytecode","evm.deployedBytecode","evm.methodIdentifiers","metadata","devdoc","userdoc","storageLayout","evm.gasEstimates","devdoc","userdoc"],"":["ast"]}},"metadata":{"useLiteralContent":true}}},"output":{"sources":{"contracts/libs/IERC20.sol":{"ast":{"absolutePath":"contracts/libs/IERC20.sol","exportedSymbols":{"IERC20":[77]},"id":78,"license":"MIT","nodeType":"SourceUnit","nodes":[{"id":1,"literals":["solidity","0.7",".6"],"nodeType":"PragmaDirective","src":"109:22:0"},{"abstract":false,"baseContracts":[],"contractDependencies":[],"contractKind":"interface","documentation":{"id":2,"nodeType":"StructuredDocumentation","src":"135:72:0","text":" @dev Interface of the ERC20 standard as defined in the EIP."},"fullyImplemented":false,"id":77,"linearizedBaseContracts":[77],"name":"IERC20","nodeType":"ContractDefinition","nodes":[{"anonymous":false,"documentation":{"id":3,"nodeType":"StructuredDocumentation","src":"233:163:0","text":" @dev Emitted when `value` tokens are moved from one account (`from`) to\n another (`to`).\n Note that `value` may be zero."},"id":11,"name":"Transfer","nodeType":"EventDefinition","parameters":{"id":10,"nodeType":"ParameterList","parameters":[{"constant":false,"id":5,"indexed":true,"mutability":"mutable","name":"from","nodeType":"VariableDeclaration","scope":11,"src":"417:20:0","stateVariable":false,"storageLocation":"default","typeDescriptions":{"typeIdentifier":"t_address","typeString":"address"},"typeName":{"id":4,"name":"address","nodeType":"ElementaryTypeName","src":"417:7:0","stateMutability":"nonpayable","typeDescriptions":{"typeIdentifier":"t_address","typeString":"address"}},"visibility":"internal"},{"constant":false,"id":7,"indexed":true,"mutability":"mutable","name":"to","nodeType":"VariableDeclaration","scope":11,"src":"439:18:0","stateVariable":false,"storageLocation":"default","typeDescriptions":{"typeIdentifier":"t_address","typeString":"address"},"typeName":{"id":6,"name":"address","nodeType":"ElementaryTypeName","src":"439:7:0","stateMutability":"nonpayable","typeDescriptions":{"typeIdentifier":"t_address","typeString":"address"}},"visibility":"internal"},{"constant":false,"id":9,"indexed":false,"mutability":"mutable","name":"value","nodeType":"VariableDeclaration","scope":11,"src":"459:13:0","stateVariable":false,"storageLocation":"default","typeDescriptions":{"typeIdentifier":"t_uint256","typeString":"uint256"},"typeName":{"id":8,"name":"uint256","nodeType":"ElementaryTypeName","src":"459:7:0","typeDescriptions":{"typeIdentifier":"t_uint256","typeString":"uint256"}},"visibility":"internal"}],"src":"416:57:0"},"src":"402:72:0"},{"anonymous":false,"documentation":{"id":12,"nodeType":"StructuredDocumentation","src":"482:151:0","text":" @dev Emitted when the allowance of a `spender` for an `owner` is set by\n a call to {approve}. `value` is the new allowance."},"id":20,"name":"Approval","nodeType":"EventDefinition","parameters":{"id":19,"nodeType":"ParameterList","parameters":[{"constant":false,"id":14,"indexed":true,"mutability":"mutable","name":"owner","nodeType":"VariableDeclaration","scope":20,"src":"654:21:0","stateVariable":false,"storageLocation":"default","typeDescriptions":{"typeIdentifier":"t_address","typeString":"address"},"typeName":{"id":13,"name":"address","nodeType":"ElementaryTypeName","src":"654:7:0","stateMutability":"nonpayable","typeDescriptions":{"typeIdentifier":"t_address","typeString":"address"}},"visibility":"internal"},{"constant":false,"id":16,"indexed":true,"mutability":"mutable","name":"spender","nodeType":"VariableDeclaration","scope":20,"src":"677:23:0","stateVariable":false,"storageLocation":"default","typeDescriptions":{"typeIdentifier":"t_address","typeString":"address"},"typeName":{"id":15,"name":"address","nodeType":"ElementaryTypeName","src":"677:7:0","stateMutability":"nonpayable","typeDescriptions":{"typeIdentifier":"t_address","typeString":"address"}},"visibility":"internal"},{"constant":false,"id":18,"indexed":false,"mutability":"mutable","name":"value","nodeType":"VariableDeclaration","scope":20,"src":"702:13:0","stateVariable":false,"storageLocation":"default","typeDescriptions":{"typeIdentifier":"t_uint256","typeString":"uint256"},"typeName":{"id":17,"name":"uint256","nodeType":"ElementaryTypeName","src":"702:7:0","typeDescriptions":{"typeIdentifier":"t_uint256","typeString":"uint256"}},"visibility":"internal"}],"src":"653:63:0"},"src":"639:78:0"},{"documentation":{"id":21,"nodeType":"StructuredDocumentation","src":"725:68:0","text":" @dev Returns the amount of tokens in existence."},"functionSelector":"18160ddd","id":26,"implemented":false,"kind":"function","modifiers":[],"name":"totalSupply","nodeType":"FunctionDefinition","parameters":{"id":22,"nodeType":"ParameterList","parameters":[],"src":"819:2:0"},"returnParameters":{"id":25,"nodeType":"ParameterList","parameters":[{"constant":false,"id":24,"mutability":"mutable","name":"","nodeType":"VariableDeclaration","scope":26,"src":"845:7:0","stateVariable":false,"storageLocation":"default","typeDescriptions":{"typeIdentifier":"t_uint256","typeString":"uint256"},"typeName":{"id":23,"name":"uint256","nodeType":"ElementaryTypeName","src":"845:7:0","typeDescriptions":{"typeIdentifier":"t_uint256","typeString":"uint256"}},"visibility":"internal"}],"src":"844:9:0"},"scope":77,"src":"799:55:0","stateMutability":"view","virtual":false,"visibility":"external"},{"documentation":{"id":27,"nodeType":"StructuredDocumentation","src":"862:74:0","text":" @dev Returns the amount of tokens owned by `account`."},"functionSelector":"70a08231","id":34,"implemented":false,"kind":"function","modifiers":[],"name":"balanceOf","nodeType":"FunctionDefinition","parameters":{"id":30,"nodeType":"ParameterList","parameters":[{"constant":false,"id":29,"mutability":"mutable","name":"account","nodeType":"VariableDeclaration","scope":34,"src":"961:15:0","stateVariable":false,"storageLocation":"default","typeDescriptions":{"typeIdentifier":"t_address","typeString":"address"},"typeName":{"id":28,"name":"address","nodeType":"ElementaryTypeName","src":"961:7:0","stateMutability":"nonpayable","typeDescriptions":{"typeIdentifier":"t_address","typeString":"address"}},"visibility":"internal"}],"src":"960:17:0"},"returnParameters":{"id":33,"nodeType":"ParameterList","parameters":[{"constant":false,"id":32,"mutability":"mutable","name":"","nodeType":"VariableDeclaration","scope":34,"src":"1001:7:0","stateVariable":false,"storageLocation":"default","typeDescriptions":{"typeIdentifier":"t_uint256","typeString":"uint256"},"typeName":{"id":31,"name":"uint256","nodeType":"ElementaryTypeName","src":"1001:7:0","typeDescriptions":{"typeIdentifier":"t_uint256","typeString":"uint256"}},"visibility":"internal"}],"src":"1000:9:0"},"scope":77,"src":"942:68:0","stateMutability":"view","virtual":false,"visibility":"external"},{"documentation":{"id":35,"nodeType":"StructuredDocumentation","src":"1018:208:0","text":" @dev Moves `amount` tokens from the caller's account to `to`.\n Returns a boolean value indicating whether the operation succeeded.\n Emits a {Transfer} event."},"functionSelector":"a9059cbb","id":44,"implemented":false,"kind":"function","modifiers":[],"name":"transfer","nodeType":"FunctionDefinition","parameters":{"id":40,"nodeType":"ParameterList","parameters":[{"constant":false,"id":37,"mutability":"mutable","name":"to","nodeType":"VariableDeclaration","scope":44,"src":"1250:10:0","stateVariable":false,"storageLocation":"default","typeDescriptions":{"typeIdentifier":"t_address","typeString":"address"},"typeName":{"id":36,"name":"address","nodeType":"ElementaryTypeName","src":"1250:7:0","stateMutability":"nonpayable","typeDescriptions":{"typeIdentifier":"t_address","typeString":"address"}},"visibility":"internal"},{"constant":false,"id":39,"mutability":"mutable","name":"amount","nodeType":"VariableDeclaration","scope":44,"src":"1262:14:0","stateVariable":false,"storageLocation":"default","typeDescriptions":{"typeIdentifier":"t_uint256","typeString":"uint256"},"typeName":{"id":38,"name":"uint256","nodeType":"ElementaryTypeName","src":"1262:7:0","typeDescriptions":{"typeIdentifier":"t_uint256","typeString":"uint256"}},"visibility":"internal"}],"src":"1249:28:0"},"returnParameters":{"id":43,"nodeType":"ParameterList","parameters":[{"constant":false,"id":42,"mutability":"mutable","name":"","nodeType":"VariableDeclaration","scope":44,"src":"1296:4:0","stateVariable":false,"storageLocation":"default","typeDescriptions":{"typeIdentifier":"t_bool","typeString":"bool"},"typeName":{"id":41,"name":"bool","nodeType":"ElementaryTypeName","src":"1296:4:0","typeDescriptions":{"typeIdentifier":"t_bool","typeString":"bool"}},"visibility":"internal"}],"src":"1295:6:0"},"scope":77,"src":"1232:70:0","stateMutability":"nonpayable","virtual":false,"visibility":"external"},{"documentation":{"id":45,"nodeType":"StructuredDocumentation","src":"1310:270:0","text":" @dev Returns the remaining number of tokens that `spender` will be\n allowed to spend on behalf of `owner` through {transferFrom}. This is\n zero by default.\n This value changes when {approve} or {transferFrom} are called."},"functionSelector":"dd62ed3e","id":54,"implemented":false,"kind":"function","modifiers":[],"name":"allowance","nodeType":"FunctionDefinition","parameters":{"id":50,"nodeType":"ParameterList","parameters":[{"constant":false,"id":47,"mutability":"mutable","name":"owner","nodeType":"VariableDeclaration","scope":54,"src":"1605:13:0","stateVariable":false,"storageLocation":"default","typeDescriptions":{"typeIdentifier":"t_address","typeString":"address"},"typeName":{"id":46,"name":"address","nodeType":"ElementaryTypeName","src":"1605:7:0","stateMutability":"nonpayable","typeDescriptions":{"typeIdentifier":"t_address","typeString":"address"}},"visibility":"internal"},{"constant":false,"id":49,"mutability":"mutable","name":"spender","nodeType":"VariableDeclaration","scope":54,"src":"1620:15:0","stateVariable":false,"storageLocation":"default","typeDescriptions":{"typeIdentifier":"t_address","typeString":"address"},"typeName":{"id":48,"name":"address","nodeType":"ElementaryTypeName","src":"1620:7:0","stateMutability":"nonpayable","typeDescriptions":{"typeIdentifier":"t_address","typeString":"address"}},"visibility":"internal"}],"src":"1604:32:0"},"returnParameters":{"id":53,"nodeType":"ParameterList","parameters":[{"constant":false,"id":52,"mutability":"mutable","name":"","nodeType":"VariableDeclaration","scope":54,"src":"1660:7:0","stateVariable":false,"storageLocation":"default","typeDescriptions":{"typeIdentifier":"t_uint256","typeString":"uint256"},"typeName":{"id":51,"name":"uint256","nodeType":"ElementaryTypeName","src":"1660:7:0","typeDescriptions":{"typeIdentifier":"t_uint256","typeString":"uint256"}},"visibility":"internal"}],"src":"1659:9:0"},"scope":77,"src":"1586:83:0","stateMutability":"view","virtual":false,"visibility":"external"},{"documentation":{"id":55,"nodeType":"StructuredDocumentation","src":"1677:655:0","text":" @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\n Returns a boolean value indicating whether the operation succeeded.\n IMPORTANT: Beware that changing an allowance with this method brings the risk\n that someone may use both the old and the new allowance by unfortunate\n transaction ordering. One possible solution to mitigate this race\n condition is to first reduce the spender's allowance to 0 and set the\n desired value afterwards:\n https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n Emits an {Approval} event."},"functionSelector":"095ea7b3","id":64,"implemented":false,"kind":"function","modifiers":[],"name":"approve","nodeType":"FunctionDefinition","parameters":{"id":60,"nodeType":"ParameterList","parameters":[{"constant":false,"id":57,"mutability":"mutable","name":"spender","nodeType":"VariableDeclaration","scope":64,"src":"2355:15:0","stateVariable":false,"storageLocation":"default","typeDescriptions":{"typeIdentifier":"t_address","typeString":"address"},"typeName":{"id":56,"name":"address","nodeType":"ElementaryTypeName","src":"2355:7:0","stateMutability":"nonpayable","typeDescriptions":{"typeIdentifier":"t_address","typeString":"address"}},"visibility":"internal"},{"constant":false,"id":59,"mutability":"mutable","name":"amount","nodeType":"VariableDeclaration","scope":64,"src":"2372:14:0","stateVariable":false,"storageLocation":"default","typeDescriptions":{"typeIdentifier":"t_uint256","typeString":"uint256"},"typeName":{"id":58,"name":"uint256","nodeType":"ElementaryTypeName","src":"2372:7:0","typeDescriptions":{"typeIdentifier":"t_uint256","typeString":"uint256"}},"visibility":"internal"}],"src":"2354:33:0"},"returnParameters":{"id":63,"nodeType":"ParameterList","parameters":[{"constant":false,"id":62,"mutability":"mutable","name":"","nodeType":"VariableDeclaration","scope":64,"src":"2406:4:0","stateVariable":false,"storageLocation":"default","typeDescriptions":{"typeIdentifier":"t_bool","typeString":"bool"},"typeName":{"id":61,"name":"bool","nodeType":"ElementaryTypeName","src":"2406:4:0","typeDescriptions":{"typeIdentifier":"t_bool","typeString":"bool"}},"visibility":"internal"}],"src":"2405:6:0"},"scope":77,"src":"2338:74:0","stateMutability":"nonpayable","virtual":false,"visibility":"external"},{"documentation":{"id":65,"nodeType":"StructuredDocumentation","src":"2420:295:0","text":" @dev Moves `amount` tokens from `from` to `to` using the\n allowance mechanism. `amount` is then deducted from the caller's\n allowance.\n Returns a boolean value indicating whether the operation succeeded.\n Emits a {Transfer} event."},"functionSelector":"23b872dd","id":76,"implemented":false,"kind":"function","modifiers":[],"name":"transferFrom","nodeType":"FunctionDefinition","parameters":{"id":72,"nodeType":"ParameterList","parameters":[{"constant":false,"id":67,"mutability":"mutable","name":"from","nodeType":"VariableDeclaration","scope":76,"src":"2743:12:0","stateVariable":false,"storageLocation":"default","typeDescriptions":{"typeIdentifier":"t_address","typeString":"address"},"typeName":{"id":66,"name":"address","nodeType":"ElementaryTypeName","src":"2743:7:0","stateMutability":"nonpayable","typeDescriptions":{"typeIdentifier":"t_address","typeString":"address"}},"visibility":"internal"},{"constant":false,"id":69,"mutability":"mutable","name":"to","nodeType":"VariableDeclaration","scope":76,"src":"2757:10:0","stateVariable":false,"storageLocation":"default","typeDescriptions":{"typeIdentifier":"t_address","typeString":"address"},"typeName":{"id":68,"name":"address","nodeType":"ElementaryTypeName","src":"2757:7:0","stateMutability":"nonpayable","typeDescriptions":{"typeIdentifier":"t_address","typeString":"address"}},"visibility":"internal"},{"constant":false,"id":71,"mutability":"mutable","name":"amount","nodeType":"VariableDeclaration","scope":76,"src":"2769:14:0","stateVariable":false,"storageLocation":"default","typeDescriptions":{"typeIdentifier":"t_uint256","typeString":"uint256"},"typeName":{"id":70,"name":"uint256","nodeType":"ElementaryTypeName","src":"2769:7:0","typeDescriptions":{"typeIdentifier":"t_uint256","typeString":"uint256"}},"visibility":"internal"}],"src":"2742:42:0"},"returnParameters":{"id":75,"nodeType":"ParameterList","parameters":[{"constant":false,"id":74,"mutability":"mutable","name":"","nodeType":"VariableDeclaration","scope":76,"src":"2803:4:0","stateVariable":false,"storageLocation":"default","typeDescriptions":{"typeIdentifier":"t_bool","typeString":"bool"},"typeName":{"id":73,"name":"bool","nodeType":"ElementaryTypeName","src":"2803:4:0","typeDescriptions":{"typeIdentifier":"t_bool","typeString":"bool"}},"visibility":"internal"}],"src":"2802:6:0"},"scope":77,"src":"2721:88:0","stateMutability":"nonpayable","virtual":false,"visibility":"external"}],"scope":78,"src":"209:2603:0"}],"src":"109:2705:0"},"id":0},"contracts/libs/ReentrancyGuard.sol":{"ast":{"absolutePath":"contracts/libs/ReentrancyGuard.sol","exportedSymbols":{"ReentrancyGuard":[142]},"id":143,"license":"MIT","nodeType":"SourceUnit","nodes":[{"id":79,"literals":["solidity","0.7",".6"],"nodeType":"PragmaDirective","src":"115:22:1"},{"abstract":true,"baseContracts":[],"contractDependencies":[],"contractKind":"contract","documentation":{"id":80,"nodeType":"StructuredDocumentation","src":"141:765:1","text":" @dev Contract module that helps prevent reentrant calls to a function.\n Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier\n available, which can be applied to functions to make sure there are no nested\n (reentrant) calls to them.\n Note that because there is a single `nonReentrant` guard, functions marked as\n `nonReentrant` may not call one another. This can be worked around by making\n those functions `private`, and then adding `external` `nonReentrant` entry\n points to them.\n TIP: If you would like to learn more about reentrancy and alternative ways\n to protect against it, check out our blog post\n https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After 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It is possible to prevent this from happening\n by making the `nonReentrant` function external, and making it call a\n `private` function that does the actual 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One possible solution to mitigate this race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards: https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 Emits an {Approval} event."},"balanceOf(address)":{"details":"Returns the amount of tokens owned by `account`."},"totalSupply()":{"details":"Returns the amount of tokens in existence."},"transfer(address,uint256)":{"details":"Moves `amount` tokens from the caller's account to `to`. Returns a boolean value indicating whether the operation succeeded. Emits a {Transfer} event."},"transferFrom(address,address,uint256)":{"details":"Moves `amount` tokens from `from` to `to` using the allowance mechanism. `amount` is then deducted from the caller's allowance. Returns a boolean value indicating whether the operation succeeded. Emits a {Transfer} event."}},"version":1},"evm":{"bytecode":{"generatedSources":[],"linkReferences":{},"object":"","opcodes":"","sourceMap":""},"deployedBytecode":{"generatedSources":[],"immutableReferences":{},"linkReferences":{},"object":"","opcodes":"","sourceMap":""},"gasEstimates":null,"methodIdentifiers":{"allowance(address,address)":"dd62ed3e","approve(address,uint256)":"095ea7b3","balanceOf(address)":"70a08231","totalSupply()":"18160ddd","transfer(address,uint256)":"a9059cbb","transferFrom(address,address,uint256)":"23b872dd"}},"metadata":"{\"compiler\":{\"version\":\"0.7.6+commit.7338295f\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"Approval\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"indexed\":false,\"internalType\":\"uint256\",\"name\":\"value\",\"type\":\"uint256\"}],\"name\":\"Transfer\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"}],\"name\":\"allowance\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"spender\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"approve\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"account\",\"type\":\"address\"}],\"name\":\"balanceOf\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"totalSupply\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"transfer\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"amount\",\"type\":\"uint256\"}],\"name\":\"transferFrom\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"details\":\"Interface of the ERC20 standard as defined in the EIP.\",\"events\":{\"Approval(address,address,uint256)\":{\"details\":\"Emitted when the allowance of a `spender` for an `owner` is set by a call to {approve}. `value` is the new allowance.\"},\"Transfer(address,address,uint256)\":{\"details\":\"Emitted when `value` tokens are moved from one account (`from`) to another (`to`). 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One possible solution to mitigate this race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards: https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 Emits an {Approval} event.\"},\"balanceOf(address)\":{\"details\":\"Returns the amount of tokens owned by `account`.\"},\"totalSupply()\":{\"details\":\"Returns the amount of tokens in existence.\"},\"transfer(address,uint256)\":{\"details\":\"Moves `amount` tokens from the caller's account to `to`. Returns a boolean value indicating whether the operation succeeded. Emits a {Transfer} event.\"},\"transferFrom(address,address,uint256)\":{\"details\":\"Moves `amount` tokens from `from` to `to` using the allowance mechanism. `amount` is then deducted from the caller's allowance. Returns a boolean value indicating whether the operation succeeded. Emits a {Transfer} event.\"}},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"contracts/libs/IERC20.sol\":\"IERC20\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\",\"useLiteralContent\":true},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[]},\"sources\":{\"contracts/libs/IERC20.sol\":{\"content\":\"// SPDX-License-Identifier: MIT\\r\\n// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol)\\r\\n\\r\\npragma solidity 0.7.6;\\r\\n\\r\\n/**\\r\\n * @dev Interface of the ERC20 standard as defined in the EIP.\\r\\n */\\r\\ninterface IERC20 {\\r\\n    /**\\r\\n     * @dev Emitted when `value` tokens are moved from one account (`from`) to\\r\\n     * another (`to`).\\r\\n     *\\r\\n     * Note that `value` may be zero.\\r\\n     */\\r\\n    event Transfer(address indexed from, address indexed to, uint256 value);\\r\\n\\r\\n    /**\\r\\n     * @dev Emitted when the allowance of a `spender` for an `owner` is set by\\r\\n     * a call to {approve}. `value` is the new allowance.\\r\\n     */\\r\\n    event Approval(address indexed owner, address indexed spender, uint256 value);\\r\\n\\r\\n    /**\\r\\n     * @dev Returns the amount of tokens in existence.\\r\\n     */\\r\\n    function totalSupply() external view returns (uint256);\\r\\n\\r\\n    /**\\r\\n     * @dev Returns the amount of tokens owned by `account`.\\r\\n     */\\r\\n    function balanceOf(address account) external view returns (uint256);\\r\\n\\r\\n    /**\\r\\n     * @dev Moves `amount` tokens from the caller's account to `to`.\\r\\n     *\\r\\n     * Returns a boolean value indicating whether the operation succeeded.\\r\\n     *\\r\\n     * Emits a {Transfer} event.\\r\\n     */\\r\\n    function transfer(address to, uint256 amount) external returns (bool);\\r\\n\\r\\n    /**\\r\\n     * @dev Returns the remaining number of tokens that `spender` will be\\r\\n     * allowed to spend on behalf of `owner` through {transferFrom}. This is\\r\\n     * zero by default.\\r\\n     *\\r\\n     * This value changes when {approve} or {transferFrom} are called.\\r\\n     */\\r\\n    function allowance(address owner, address spender) external view returns (uint256);\\r\\n\\r\\n    /**\\r\\n     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\\r\\n     *\\r\\n     * Returns a boolean value indicating whether the operation succeeded.\\r\\n     *\\r\\n     * IMPORTANT: Beware that changing an allowance with this method brings the risk\\r\\n     * that someone may use both the old and the new allowance by unfortunate\\r\\n     * transaction ordering. One possible solution to mitigate this race\\r\\n     * condition is to first reduce the spender's allowance to 0 and set the\\r\\n     * desired value afterwards:\\r\\n     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\\r\\n     *\\r\\n     * Emits an {Approval} event.\\r\\n     */\\r\\n    function approve(address spender, uint256 amount) external returns (bool);\\r\\n\\r\\n    /**\\r\\n     * @dev Moves `amount` tokens from `from` to `to` using the\\r\\n     * allowance mechanism. `amount` is then deducted from the caller's\\r\\n     * allowance.\\r\\n     *\\r\\n     * Returns a boolean value indicating whether the operation succeeded.\\r\\n     *\\r\\n     * Emits a {Transfer} event.\\r\\n     */\\r\\n    function transferFrom(address from, address to, uint256 amount) external returns (bool);\\r\\n}\\r\\n\",\"keccak256\":\"0xc80a9087e17fc7240b8cc948452d1da19020e61c79e0cb2e97852cb135ea13a2\",\"license\":\"MIT\"}},\"version\":1}","storageLayout":{"storage":[],"types":null},"userdoc":{"kind":"user","methods":{},"version":1}}},"contracts/libs/ReentrancyGuard.sol":{"ReentrancyGuard":{"abi":[],"devdoc":{"details":"Contract module that helps prevent reentrant calls to a function. 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TIP: If you would like to learn more about reentrancy and alternative ways to protect against it, check out our blog post https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].","kind":"dev","methods":{},"version":1},"evm":{"bytecode":{"generatedSources":[],"linkReferences":{},"object":"","opcodes":"","sourceMap":""},"deployedBytecode":{"generatedSources":[],"immutableReferences":{},"linkReferences":{},"object":"","opcodes":"","sourceMap":""},"gasEstimates":null,"methodIdentifiers":{}},"metadata":"{\"compiler\":{\"version\":\"0.7.6+commit.7338295f\"},\"language\":\"Solidity\",\"output\":{\"abi\":[],\"devdoc\":{\"details\":\"Contract module that helps prevent reentrant calls to a function. Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier available, which can be applied to functions to make sure there are no nested (reentrant) calls to them. Note that because there is a single `nonReentrant` guard, functions marked as `nonReentrant` may not call one another. This can be worked around by making those functions `private`, and then adding `external` `nonReentrant` entry points to them. TIP: If you would like to learn more about reentrancy and alternative ways to protect against it, check out our blog post https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].\",\"kind\":\"dev\",\"methods\":{},\"version\":1},\"userdoc\":{\"kind\":\"user\",\"methods\":{},\"version\":1}},\"settings\":{\"compilationTarget\":{\"contracts/libs/ReentrancyGuard.sol\":\"ReentrancyGuard\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\",\"useLiteralContent\":true},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[]},\"sources\":{\"contracts/libs/ReentrancyGuard.sol\":{\"content\":\"// SPDX-License-Identifier: MIT\\r\\n// OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol)\\r\\n\\r\\npragma solidity 0.7.6;\\r\\n\\r\\n/**\\r\\n * @dev Contract module that helps prevent reentrant calls to a function.\\r\\n *\\r\\n * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier\\r\\n * available, which can be applied to functions to make sure there are no nested\\r\\n * (reentrant) calls to them.\\r\\n *\\r\\n * Note that because there is a single `nonReentrant` guard, functions marked as\\r\\n * `nonReentrant` may not call one another. This can be worked around by making\\r\\n * those functions `private`, and then adding `external` `nonReentrant` entry\\r\\n * points to them.\\r\\n *\\r\\n * TIP: If you would like to learn more about reentrancy and alternative ways\\r\\n * to protect against it, check out our blog post\\r\\n * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].\\r\\n */\\r\\nabstract contract ReentrancyGuard {\\r\\n    // Booleans are more expensive than uint256 or any type that takes up a full\\r\\n    // word because each write operation emits an extra SLOAD to first read the\\r\\n    // slot's contents, replace the bits taken up by the boolean, and then write\\r\\n    // back. This is the compiler's defense against contract upgrades and\\r\\n    // pointer aliasing, and it cannot be disabled.\\r\\n\\r\\n    // The values being non-zero value makes deployment a bit more expensive,\\r\\n    // but in exchange the refund on every call to nonReentrant will be lower in\\r\\n    // amount. Since refunds are capped to a percentage of the total\\r\\n    // transaction's gas, it is best to keep them low in cases like this one, to\\r\\n    // increase the likelihood of the full refund coming into effect.\\r\\n    uint256 private constant _NOT_ENTERED = 1;\\r\\n    uint256 private constant _ENTERED = 2;\\r\\n\\r\\n    uint256 private _status;\\r\\n\\r\\n    constructor() {\\r\\n        _status = _NOT_ENTERED;\\r\\n    }\\r\\n\\r\\n    /**\\r\\n     * @dev Prevents a contract from calling itself, directly or indirectly.\\r\\n     * Calling a `nonReentrant` function from another `nonReentrant`\\r\\n     * function is not supported. It is possible to prevent this from happening\\r\\n     * by making the `nonReentrant` function external, and making it call a\\r\\n     * `private` function that does the actual work.\\r\\n     */\\r\\n    modifier nonReentrant() {\\r\\n        _nonReentrantBefore();\\r\\n        _;\\r\\n        _nonReentrantAfter();\\r\\n    }\\r\\n\\r\\n    function _nonReentrantBefore() private {\\r\\n        // On the first call to nonReentrant, _status will be _NOT_ENTERED\\r\\n        require(_status != _ENTERED, 'ReentrancyGuard: reentrant call');\\r\\n\\r\\n        // Any calls to nonReentrant after this point will fail\\r\\n        _status = _ENTERED;\\r\\n    }\\r\\n\\r\\n    function _nonReentrantAfter() private {\\r\\n        // By storing the original value once again, a refund is triggered (see\\r\\n        // https://eips.ethereum.org/EIPS/eip-2200)\\r\\n        _status = _NOT_ENTERED;\\r\\n    }\\r\\n\\r\\n    /**\\r\\n     * @dev Returns true if the reentrancy guard is currently set to \\\"entered\\\", which indicates there is a\\r\\n     * `nonReentrant` function in the call stack.\\r\\n     */\\r\\n    function _reentrancyGuardEntered() internal view returns (bool) {\\r\\n        return _status == _ENTERED;\\r\\n    }\\r\\n}\\r\\n\",\"keccak256\":\"0xaec9a53a9f39c550f910415475856c442dc392aea1e709f45a94d587c9fb77ad\",\"license\":\"MIT\"}},\"version\":1}","storageLayout":{"storage":[{"astId":88,"contract":"contracts/libs/ReentrancyGuard.sol:ReentrancyGuard","label":"_status","offset":0,"slot":"0","type":"t_uint256"}],"types":{"t_uint256":{"encoding":"inplace","label":"uint256","numberOfBytes":"32"}}},"userdoc":{"kind":"user","methods":{},"version":1}}}}}}