{ "fileName": "TokenVesting.sol", "contractName": "TokenVestingUpgradeSafe", "source": "pragma solidity ^0.6.0;\n\nimport \"../token/ERC20/SafeERC20.sol\";\nimport \"../access/Ownable.sol\";\nimport \"../math/SafeMath.sol\";\nimport \"../Initializable.sol\";\n\n/**\n * @title TokenVesting\n * @dev A token holder contract that can release its token balance gradually like a\n * typical vesting scheme, with a cliff and vesting period. Optionally revocable by the\n * owner.\n */\ncontract TokenVestingUpgradeSafe is Initializable, OwnableUpgradeSafe {\n // The vesting schedule is time-based (i.e. using block timestamps as opposed to e.g. block numbers), and is\n // therefore sensitive to timestamp manipulation (which is something miners can do, to a certain degree). Therefore,\n // it is recommended to avoid using short time durations (less than a minute). Typical vesting schemes, with a\n // cliff period of a year and a duration of four years, are safe to use.\n // solhint-disable not-rely-on-time\n\n using SafeMath for uint256;\n using SafeERC20 for IERC20;\n\n event TokensReleased(address token, uint256 amount);\n event TokenVestingRevoked(address token);\n\n // beneficiary of tokens after they are released\n address private _beneficiary;\n\n // Durations and timestamps are expressed in UNIX time, the same units as block.timestamp.\n uint256 private _cliff;\n uint256 private _start;\n uint256 private _duration;\n\n bool private _revocable;\n\n mapping (address => uint256) private _released;\n mapping (address => bool) private _revoked;\n\n /**\n * @dev Creates a vesting contract that vests its balance of any ERC20 token to the\n * beneficiary, gradually in a linear fashion until start + duration. By then all\n * of the balance will have vested.\n * @param beneficiary address of the beneficiary to whom vested tokens are transferred\n * @param cliffDuration duration in seconds of the cliff in which tokens will begin to vest\n * @param start the time (as Unix time) at which point vesting starts\n * @param duration duration in seconds of the period in which the tokens will vest\n * @param revocable whether the vesting is revocable or not\n */\n\n function __TokenVesting_init(address beneficiary, uint256 start, uint256 cliffDuration, uint256 duration, bool revocable) internal initializer {\n __Context_init_unchained();\n __Ownable_init_unchained();\n __TokenVesting_init_unchained(beneficiary, start, cliffDuration, duration, revocable);\n }\n\n function __TokenVesting_init_unchained(address beneficiary, uint256 start, uint256 cliffDuration, uint256 duration, bool revocable) internal initializer {\n\n\n require(beneficiary != address(0), \"TokenVesting: beneficiary is the zero address\");\n // solhint-disable-next-line max-line-length\n require(cliffDuration <= duration, \"TokenVesting: cliff is longer than duration\");\n require(duration > 0, \"TokenVesting: duration is 0\");\n // solhint-disable-next-line max-line-length\n require(start.add(duration) > block.timestamp, \"TokenVesting: final time is before current time\");\n\n _beneficiary = beneficiary;\n _revocable = revocable;\n _duration = duration;\n _cliff = start.add(cliffDuration);\n _start = start;\n\n }\n\n\n /**\n * @return the beneficiary of the tokens.\n */\n function beneficiary() public view returns (address) {\n return _beneficiary;\n }\n\n /**\n * @return the cliff time of the token vesting.\n */\n function cliff() public view returns (uint256) {\n return _cliff;\n }\n\n /**\n * @return the start time of the token vesting.\n */\n function start() public view returns (uint256) {\n return _start;\n }\n\n /**\n * @return the duration of the token vesting.\n */\n function duration() public view returns (uint256) {\n return _duration;\n }\n\n /**\n * @return true if the vesting is revocable.\n */\n function revocable() public view returns (bool) {\n return _revocable;\n }\n\n /**\n * @return the amount of the token released.\n */\n function released(address token) public view returns (uint256) {\n return _released[token];\n }\n\n /**\n * @return true if the token is revoked.\n */\n function revoked(address token) public view returns (bool) {\n return _revoked[token];\n }\n\n /**\n * @notice Transfers vested tokens to beneficiary.\n * @param token ERC20 token which is being vested\n */\n function release(IERC20 token) public {\n uint256 unreleased = _releasableAmount(token);\n\n require(unreleased > 0, \"TokenVesting: no tokens are due\");\n\n _released[address(token)] = _released[address(token)].add(unreleased);\n\n token.safeTransfer(_beneficiary, unreleased);\n\n emit TokensReleased(address(token), unreleased);\n }\n\n /**\n * @notice Allows the owner to revoke the vesting. Tokens already vested\n * remain in the contract, the rest are returned to the owner.\n * @param token ERC20 token which is being vested\n */\n function revoke(IERC20 token) public onlyOwner {\n require(_revocable, \"TokenVesting: cannot revoke\");\n require(!_revoked[address(token)], \"TokenVesting: token already revoked\");\n\n uint256 balance = token.balanceOf(address(this));\n\n uint256 unreleased = _releasableAmount(token);\n uint256 refund = balance.sub(unreleased);\n\n _revoked[address(token)] = true;\n\n token.safeTransfer(owner(), refund);\n\n emit TokenVestingRevoked(address(token));\n }\n\n /**\n * @dev Calculates the amount that has already vested but hasn't been released yet.\n * @param token ERC20 token which is being vested\n */\n function _releasableAmount(IERC20 token) private view returns (uint256) {\n return _vestedAmount(token).sub(_released[address(token)]);\n }\n\n /**\n * @dev Calculates the amount that has already vested.\n * @param token ERC20 token which is being vested\n */\n function _vestedAmount(IERC20 token) private view returns (uint256) {\n uint256 currentBalance = token.balanceOf(address(this));\n uint256 totalBalance = currentBalance.add(_released[address(token)]);\n\n if (block.timestamp < _cliff) {\n return 0;\n } else if (block.timestamp >= _start.add(_duration) || _revoked[address(token)]) {\n return totalBalance;\n } else {\n return totalBalance.mul(block.timestamp.sub(_start)).div(_duration);\n }\n }\n\n uint256[44] private __gap;\n}\n", "sourcePath": "contracts/drafts/TokenVesting.sol", "sourceMap": "372:6182:11:-:0;;;;5:9:-1;2:2;;;27:1;24;17:12;2:2;372:6182:11;;;;;;;", "deployedSourceMap": 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"abi": [ { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "previousOwner", "type": "address" }, { "indexed": true, "internalType": "address", "name": "newOwner", "type": "address" } ], "name": "OwnershipTransferred", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": false, "internalType": "address", "name": "token", "type": "address" } ], "name": "TokenVestingRevoked", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": false, "internalType": "address", "name": "token", "type": "address" }, { "indexed": false, "internalType": "uint256", "name": "amount", "type": "uint256" } ], "name": "TokensReleased", "type": "event" }, { "inputs": [], "name": "beneficiary", "outputs": [ { "internalType": "address", "name": "", "type": "address" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "cliff", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "duration", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "owner", "outputs": [ { "internalType": "address", "name": "", "type": "address" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "contract IERC20", "name": "token", "type": "address" } ], "name": "release", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "token", "type": "address" } ], "name": "released", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "renounceOwnership", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [], "name": "revocable", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "contract IERC20", "name": "token", "type": "address" } ], "name": "revoke", "outputs": [], "stateMutability": "nonpayable", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "token", "type": "address" } ], "name": "revoked", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "stateMutability": "view", "type": "function" }, { "inputs": [], "name": "start", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "stateMutability": "view", "type": "function" }, { "inputs": [ { "internalType": "address", "name": "newOwner", "type": "address" } ], "name": "transferOwnership", "outputs": [], "stateMutability": "nonpayable", "type": "function" } ], "ast": { "absolutePath": "contracts/drafts/TokenVesting.sol", "exportedSymbols": { "TokenVestingUpgradeSafe": [ 2437 ] }, "id": 2438, "nodeType": "SourceUnit", "nodes": [ { "id": 1998, "literals": [ "solidity", "^", "0.6", ".0" ], "nodeType": "PragmaDirective", "src": "0:23:11" }, { "absolutePath": "contracts/token/ERC20/SafeERC20.sol", "file": "../token/ERC20/SafeERC20.sol", "id": 1999, "nodeType": "ImportDirective", "scope": 2438, "sourceUnit": 11091, "src": "25:38:11", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "contracts/access/Ownable.sol", "file": "../access/Ownable.sol", "id": 2000, "nodeType": "ImportDirective", "scope": 2438, "sourceUnit": 1828, "src": "64:31:11", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "contracts/math/SafeMath.sol", "file": "../math/SafeMath.sol", "id": 2001, "nodeType": "ImportDirective", "scope": 2438, "sourceUnit": 3153, "src": "96:30:11", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "contracts/Initializable.sol", "file": "../Initializable.sol", "id": 2002, "nodeType": "ImportDirective", "scope": 2438, "sourceUnit": 1408, "src": "127:30:11", "symbolAliases": [], "unitAlias": "" }, { "abstract": false, "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 2004, "name": "Initializable", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 1407, "src": "408:13:11", "typeDescriptions": { "typeIdentifier": "t_contract$_Initializable_$1407", "typeString": "contract Initializable" } }, "id": 2005, "nodeType": "InheritanceSpecifier", "src": "408:13:11" }, { "arguments": null, "baseName": { "contractScope": null, "id": 2006, "name": "OwnableUpgradeSafe", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 1827, "src": "423:18:11", "typeDescriptions": { "typeIdentifier": "t_contract$_OwnableUpgradeSafe_$1827", "typeString": "contract OwnableUpgradeSafe" } }, "id": 2007, "nodeType": "InheritanceSpecifier", "src": "423:18:11" } ], "contractDependencies": [ 44, 1407, 1827 ], "contractKind": "contract", "documentation": { "id": 2003, "nodeType": "StructuredDocumentation", "src": "159:212:11", "text": "@title TokenVesting\n@dev A token holder contract that can release its token balance gradually like a\ntypical vesting scheme, with a cliff and vesting period. Optionally revocable by the\nowner." }, "fullyImplemented": true, "id": 2437, "linearizedBaseContracts": [ 2437, 1827, 44, 1407 ], "name": "TokenVestingUpgradeSafe", "nodeType": "ContractDefinition", "nodes": [ { "id": 2010, "libraryName": { "contractScope": null, "id": 2008, "name": "SafeMath", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 3152, "src": "921:8:11", "typeDescriptions": { "typeIdentifier": "t_contract$_SafeMath_$3152", "typeString": "library SafeMath" } }, "nodeType": "UsingForDirective", "src": "915:27:11", "typeName": { "id": 2009, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "934:7:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } }, { "id": 2013, "libraryName": { "contractScope": null, "id": 2011, "name": "SafeERC20", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 11090, "src": "953:9:11", "typeDescriptions": { "typeIdentifier": "t_contract$_SafeERC20_$11090", "typeString": "library 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Tokens already vested\nremain in the contract, the rest are returned to the owner.\n@param token ERC20 token which is being vested" }, "functionSelector": "74a8f103", "id": 2341, "implemented": true, "kind": "function", "modifiers": [ { "arguments": null, "id": 2275, "modifierName": { "argumentTypes": null, "id": 2274, "name": "onlyOwner", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 1772, "src": "5097:9:11", "typeDescriptions": { "typeIdentifier": "t_modifier$__$", "typeString": "modifier ()" } }, "nodeType": "ModifierInvocation", "src": "5097:9:11" } ], "name": "revoke", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 2273, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2272, "mutability": "mutable", "name": "token", "nodeType": "VariableDeclaration", "overrides": null, "scope": 2341, "src": "5076:12:11", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": 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pure returns (uint256)" } }, "id": 2359, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "5814:51:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "functionReturnParameters": 2348, "id": 2360, "nodeType": "Return", "src": "5807:58:11" } ] }, "documentation": { "id": 2342, "nodeType": "StructuredDocumentation", "src": "5567:153:11", "text": "@dev Calculates the amount that has already vested but hasn't been released yet.\n@param token ERC20 token which is being vested" }, "id": 2362, "implemented": true, "kind": "function", "modifiers": [], "name": "_releasableAmount", "nodeType": "FunctionDefinition", "overrides": null, "parameters": { "id": 2345, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2344, "mutability": "mutable", "name": "token", "nodeType": "VariableDeclaration", "overrides": null, 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"isPure": false, "lValueRequested": false, "memberName": "sub", "nodeType": "MemberAccess", "referencedDeclaration": 3002, "src": "6460:19:11", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 2422, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6460:27:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_uint256", "typeString": "uint256" } ], "expression": { "argumentTypes": null, "id": 2416, "name": "totalBalance", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2381, "src": "6443:12:11", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 2417, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "mul", "nodeType": "MemberAccess", "referencedDeclaration": 3065, "src": "6443:16:11", "typeDescriptions": { "typeIdentifier": "t_function_internal_pure$_t_uint256_$_t_uint256_$returns$_t_uint256_$bound_to$_t_uint256_$", "typeString": "function (uint256,uint256) pure returns (uint256)" } }, "id": 2423, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "6443:45:11", "tryCall": false, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 2424, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "div", "nodeType": "MemberAccess", "referencedDeclaration": 3082, "src": "6443:49:11", "typeDescriptions": { "typeIdentifier": 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"nodeType": "Return", "src": "6386:19:11" } ] } }, "id": 2430, "nodeType": "IfStatement", "src": "6229:285:11", "trueBody": { "id": 2398, "nodeType": "Block", "src": "6259:33:11", "statements": [ { "expression": { "argumentTypes": null, "hexValue": "30", "id": 2396, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "6280:1:11", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, "functionReturnParameters": 2369, "id": 2397, "nodeType": "Return", "src": "6273:8:11" } ] } } ] }, "documentation": { "id": 2363, "nodeType": "StructuredDocumentation", "src": "5878:124:11", "text": "@dev Calculates the amount that has already vested.\n@param token ERC20 token which is being vested" }, "id": 2432, "implemented": true, "kind": "function", "modifiers": [], "name": "_vestedAmount", "nodeType": "FunctionDefinition", "overrides": null, 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