{ "fileName": "ERC20Capped.sol", "contractName": "ERC20Capped", "source": "// SPDX-License-Identifier: MIT\n\npragma solidity ^0.7.0;\n\nimport \"./ERC20.sol\";\n\n/**\n * @dev Extension of {ERC20} that adds a cap to the supply of tokens.\n */\nabstract contract ERC20Capped is ERC20 {\n using SafeMath for uint256;\n\n uint256 private _cap;\n\n /**\n * @dev Sets the value of the `cap`. This value is immutable, it can only be\n * set once during construction.\n */\n constructor (uint256 cap) {\n require(cap > 0, \"ERC20Capped: cap is 0\");\n _cap = cap;\n }\n\n /**\n * @dev Returns the cap on the token's total supply.\n */\n function cap() public view returns (uint256) {\n return _cap;\n }\n\n /**\n * @dev See {ERC20-_beforeTokenTransfer}.\n *\n * Requirements:\n *\n * - minted tokens must not cause the total supply to go over the cap.\n */\n function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual override {\n super._beforeTokenTransfer(from, to, amount);\n\n if (from == address(0)) { // When minting tokens\n require(totalSupply().add(amount) <= _cap, \"ERC20Capped: cap exceeded\");\n }\n }\n}\n", "sourcePath": "contracts/token/ERC20/ERC20Capped.sol", "sourceMap": "", "deployedSourceMap": "", "abi": [ { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "owner", "type": "address" }, { "indexed": true, 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{ "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": "cap", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "decimals", "outputs": [ { "internalType": "uint8", "name": "", "type": "uint8" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "spender", "type": "address" }, { "internalType": "uint256", "name": "subtractedValue", "type": "uint256" } ], "name": "decreaseAllowance", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "spender", "type": "address" }, { "internalType": "uint256", "name": "addedValue", "type": "uint256" } ], "name": "increaseAllowance", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [], "name": "name", "outputs": [ { "internalType": "string", "name": "", "type": "string" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "symbol", "outputs": [ { "internalType": "string", "name": "", "type": "string" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "totalSupply", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "recipient", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" } ], "name": "transfer", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "sender", "type": "address" }, { "internalType": "address", "name": "recipient", "type": "address" }, { "internalType": "uint256", "name": "amount", "type": "uint256" } ], "name": "transferFrom", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "nonpayable", "type": "function" } ], "ast": { "absolutePath": "contracts/token/ERC20/ERC20Capped.sol", "exportedSymbols": { "ERC20Capped": [ 9331 ] }, "id": 9332, "license": "MIT", "nodeType": "SourceUnit", "nodes": [ { "id": 9255, "literals": [ "solidity", "^", "0.7", ".0" ], "nodeType": "PragmaDirective", "src": "33:23:86" }, { "absolutePath": "contracts/token/ERC20/ERC20.sol", "file": "./ERC20.sol", "id": 9256, "nodeType": "ImportDirective", "scope": 9332, "sourceUnit": 9195, "src": "58:21:86", "symbolAliases": [], "unitAlias": "" }, { "abstract": true, "baseContracts": [ { 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"isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "451:23:86", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_073f3193e2b9c9099973df1adea790edf33994edcd3f57beae2487f3c5bd8828", "typeString": "literal_string \"ERC20Capped: cap is 0\"" }, "value": "ERC20Capped: cap is 0" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_073f3193e2b9c9099973df1adea790edf33994edcd3f57beae2487f3c5bd8828", "typeString": "literal_string \"ERC20Capped: cap is 0\"" } ], "id": 9270, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ -18, -18 ], "referencedDeclaration": -18, "src": "434:7:86", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 9275, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "434:41:86", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 9276, "nodeType": "ExpressionStatement", "src": "434:41:86" }, { "expression": { "argumentTypes": null, "id": 9279, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftHandSide": { "argumentTypes": null, "id": 9277, "name": "_cap", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 9264, "src": "485:4:86", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "Assignment", "operator": "=", "rightHandSide": { "argumentTypes": null, "id": 9278, "name": "cap", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 9267, "src": "492:3:86", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "485:10:86", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 9280, "nodeType": "ExpressionStatement", "src": "485:10:86" } ] }, "documentation": { "id": 9265, "nodeType": "StructuredDocumentation", "src": "264:129:86", "text": " @dev Sets the value of the `cap`. This value is immutable, it can only be\n set once during construction." }, "id": 9282, "implemented": true, "kind": "constructor", "modifiers": [], "name": "", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 9268, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 9267, "mutability": "mutable", "name": "cap", "nodeType": "VariableDeclaration", "overrides": null, "scope": 9282, "src": "411:11:86", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 9266, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "411:7:86", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "src": "410:13:86" }, "returnParameters": { "id": 9269, "nodeType": "ParameterList", "parameters": [], "src": "424:0:86" }, "scope": 9331, "src": "398:104:86", "stateMutability": "nonpayable", "virtual": false, "visibility": "internal" }, { "body": { "id": 9290, "nodeType": "Block", "src": "626:28:86", "statements": [ { "expression": { "argumentTypes": null, "id": 9288, "name": "_cap", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 9264, "src": "643:4:86", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 9287, "id": 9289, "nodeType": "Return", "src": "636:11:86" } ] }, "documentation": { "id": 9283, "nodeType": "StructuredDocumentation", "src": "508:68:86", "text": " @dev Returns the cap on the token's total supply." }, "functionSelector": "355274ea", "id": 9291, "implemented": true, "kind": "function", "modifiers": [], "name": "cap", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 9284, "nodeType": "ParameterList", "parameters": [], "src": "593:2:86" }, "returnParameters": { "id": 9287, "nodeType": "ParameterList", "parameters": [ { "constant": false, 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