{ "contractName": "TokenAuthority", "abi": [ { "constant": true, "inputs": [], "name": "token", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "inputs": [ { "name": "_token", "type": "address" }, { "name": "_colony", "type": "address" }, { "name": "allowedToTransfer", "type": "address[]" } ], "payable": false, "stateMutability": "nonpayable", "type": "constructor" }, { "constant": true, "inputs": [ { "name": "src", "type": "address" }, { "name": "dst", "type": "address" }, { "name": "sig", "type": "bytes4" } ], "name": "canCall", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" } ], "metadata": 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version 3 of the License, or\n (at your option) any later version.\n\n The Colony Network is distributed in the hope that it will be useful,\n but WITHOUT ANY WARRANTY; without even the implied warranty of\n MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the\n GNU General Public License for more details.\n\n You should have received a copy of the GNU General Public License\n along with The Colony Network. If not, see .\n*/\n\npragma solidity 0.5.8;\n\nimport \"../lib/dappsys/auth.sol\";\n\n\ncontract TokenAuthority is DSAuthority {\n address public token;\n mapping(address => mapping(bytes4 => bool)) authorizations;\n\n bytes4 constant BURN_FUNC_SIG = bytes4(keccak256(\"burn(uint256)\"));\n bytes4 constant BURN_OVERLOAD_FUNC_SIG = bytes4(keccak256(\"burn(address,uint256)\"));\n\n constructor(address _token, address _colony, address[] memory allowedToTransfer) public {\n token = _token;\n bytes4 transferSig = bytes4(keccak256(\"transfer(address,uint256)\"));\n bytes4 transferFromSig = bytes4(keccak256(\"transferFrom(address,address,uint256)\"));\n bytes4 mintSig = bytes4(keccak256(\"mint(uint256)\"));\n bytes4 mintSigOverload = bytes4(keccak256(\"mint(address,uint256)\"));\n\n authorizations[_colony][transferSig] = true;\n authorizations[_colony][mintSig] = true;\n authorizations[_colony][mintSigOverload] = true;\n\n for (uint i = 0; i < allowedToTransfer.length; i++) {\n authorizations[allowedToTransfer[i]][transferSig] = true;\n authorizations[allowedToTransfer[i]][transferFromSig] = true;\n }\n }\n\n function canCall(address src, address dst, bytes4 sig) public view returns (bool) {\n if (sig == BURN_FUNC_SIG || sig == BURN_OVERLOAD_FUNC_SIG) {\n // We allow anyone to burn their own tokens even when the token is still locked\n return true;\n }\n\n if (dst != token) {\n return false;\n }\n\n return authorizations[src][sig];\n }\n}\n", "sourcePath": "/Users/Elena/colonyToken/contracts/TokenAuthority.sol", "ast": { "absolutePath": "/Users/Elena/colonyToken/contracts/TokenAuthority.sol", "exportedSymbols": { "TokenAuthority": [ 503 ] }, "id": 504, "nodeType": "SourceUnit", "nodes": [ { "id": 337, "literals": [ "solidity", "0.5", ".8" ], "nodeType": "PragmaDirective", "src": "700:22:3" }, { "absolutePath": "/Users/Elena/colonyToken/lib/dappsys/auth.sol", "file": "../lib/dappsys/auth.sol", "id": 338, "nodeType": "ImportDirective", "scope": 504, "sourceUnit": 1310, "src": "724:33:3", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 339, "name": "DSAuthority", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 1186, "src": "787:11:3", "typeDescriptions": { "typeIdentifier": "t_contract$_DSAuthority_$1186", "typeString": "contract DSAuthority" } }, "id": 340, "nodeType": "InheritanceSpecifier", "src": "787:11:3" } ], "contractDependencies": [ 1186 ], "contractKind": "contract", "documentation": null, "fullyImplemented": true, "id": 503, "linearizedBaseContracts": [ 503, 1186 ], "name": "TokenAuthority", "nodeType": "ContractDefinition", "nodes": [ { "constant": false, "id": 342, "name": "token", "nodeType": "VariableDeclaration", "scope": 503, "src": "803:20:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 341, "name": "address", "nodeType": "ElementaryTypeName", "src": "803:7:3", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "public" }, { "constant": false, "id": 348, "name": "authorizations", "nodeType": "VariableDeclaration", "scope": 503, "src": "827:58:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_bytes4_$_t_bool_$_$", "typeString": "mapping(address => mapping(bytes4 => bool))" }, "typeName": { "id": 347, "keyType": { "id": 343, "name": "address", "nodeType": "ElementaryTypeName", "src": "835:7:3", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "nodeType": "Mapping", "src": "827:43:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_mapping$_t_bytes4_$_t_bool_$_$", "typeString": "mapping(address => mapping(bytes4 => bool))" }, "valueType": { "id": 346, "keyType": { "id": 344, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "854:6:3", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "nodeType": "Mapping", "src": "846:23:3", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_bytes4_$_t_bool_$", "typeString": "mapping(bytes4 => bool)" }, "valueType": { "id": 345, "name": "bool", "nodeType": "ElementaryTypeName", "src": "864:4:3", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } } } }, "value": null, "visibility": "internal" }, { "constant": true, "id": 355, "name": "BURN_FUNC_SIG", "nodeType": "VariableDeclaration", "scope": 503, "src": "890:66:3", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" }, "typeName": { "id": 349, "name": "bytes4", "nodeType": "ElementaryTypeName", "src": "890:6:3", "typeDescriptions": { "typeIdentifier": "t_bytes4", "typeString": "bytes4" } }, "value": { "argumentTypes": null, 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