{ "contractName": "SocialRecoveryModule", "abi": [ { "constant": true, "inputs": [], "name": "threshold", "outputs": [ { "name": "", "type": "uint8" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "manager", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "", "type": "address" } ], "name": "isFriend", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "name": "_masterCopy", "type": "address" } ], "name": "changeMasterCopy", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [], "name": "NAME", "outputs": [ { "name": "", "type": "string" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "", "type": "bytes32" }, { "name": "", "type": "address" } ], "name": "isConfirmed", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "", "type": "uint256" } ], "name": "friends", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "", "type": "bytes32" } ], "name": "isExecuted", "outputs": [ { "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "VERSION", "outputs": [ { "name": "", "type": "string" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "name": "_friends", "type": "address[]" }, { "name": "_threshold", "type": "uint8" } ], "name": "setup", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": 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"source": "pragma solidity 0.4.24;\nimport \"../Enum.sol\";\nimport \"../Module.sol\";\nimport \"../ModuleManager.sol\";\nimport \"../OwnerManager.sol\";\n\n\n/// @title Social Recovery Module - Allows to replace an owner without Safe confirmations if friends approve the replacement.\n/// @author Stefan George - \ncontract SocialRecoveryModule is Module {\n\n string public constant NAME = \"Social Recovery Module\";\n string public constant VERSION = \"0.0.1\";\n\n uint8 public threshold;\n address[] public friends;\n\n // isFriend mapping maps friend's address to friend status.\n mapping (address => bool) public isFriend;\n // isExecuted mapping maps data hash to execution status.\n mapping (bytes32 => bool) public isExecuted;\n // isConfirmed mapping maps data hash to friend's address to confirmation status.\n mapping (bytes32 => mapping (address => bool)) public isConfirmed;\n\n modifier onlyFriend() {\n require(isFriend[msg.sender], \"Method can only be called by a friend\");\n _;\n }\n\n /// @dev Setup function sets initial storage of contract.\n /// @param _friends List of friends' addresses.\n /// @param _threshold Required number of friends to confirm replacement.\n function setup(address[] _friends, uint8 _threshold)\n public\n {\n require(_threshold <= _friends.length, \"Threshold cannot exceed friends count\");\n require(_threshold >= 2, \"At least 2 friends required\");\n setManager();\n // Set allowed friends.\n for (uint256 i = 0; i < _friends.length; i++) {\n address friend = _friends[i];\n require(friend != 0, \"Invalid friend address provided\");\n require(!isFriend[friend], \"Duplicate friend address provided\");\n isFriend[friend] = true;\n }\n friends = _friends;\n threshold = _threshold;\n }\n\n /// @dev Allows a friend to confirm a Safe transaction.\n /// @param dataHash Safe transaction hash.\n function confirmTransaction(bytes32 dataHash)\n public\n onlyFriend\n {\n require(!isExecuted[dataHash], \"Recovery already executed\");\n isConfirmed[dataHash][msg.sender] = true;\n }\n\n /// @dev Returns if Safe transaction is a valid owner replacement transaction.\n /// @param prevOwner Owner that pointed to the owner to be replaced in the linked list\n /// @param oldOwner Owner address to be replaced.\n /// @param newOwner New owner address.\n /// @return Returns if transaction can be executed.\n function recoverAccess(address prevOwner, address oldOwner, address newOwner)\n public\n onlyFriend\n {\n bytes memory data = abi.encodeWithSignature(\"swapOwner(address,address,address)\", prevOwner, oldOwner, newOwner);\n bytes32 dataHash = getDataHash(data);\n require(!isExecuted[dataHash], \"Recovery already executed\");\n require(isConfirmedByRequiredFriends(dataHash), \"Recovery has not enough confirmations\");\n isExecuted[dataHash] = true;\n require(manager.execTransactionFromModule(address(manager), 0, data, Enum.Operation.Call), \"Could not execute recovery\");\n }\n\n /// @dev Returns if Safe transaction is a valid owner replacement transaction.\n /// @param dataHash Data hash.\n /// @return Confirmation status.\n function isConfirmedByRequiredFriends(bytes32 dataHash)\n public\n view\n returns (bool)\n {\n uint256 confirmationCount;\n for (uint256 i = 0; i < friends.length; i++) {\n if (isConfirmed[dataHash][friends[i]])\n confirmationCount++;\n if (confirmationCount == threshold)\n return true;\n }\n return false;\n }\n\n /// @dev Returns hash of data encoding owner replacement.\n /// @param data Data payload.\n /// @return Data hash.\n function getDataHash(bytes data)\n public\n pure\n returns (bytes32)\n {\n return keccak256(data);\n }\n}\n", "sourcePath": "/Users/apanizo/git/gnosis/safe-contracts/contracts/modules/SocialRecoveryModule.sol", "ast": { "absolutePath": "/Users/apanizo/git/gnosis/safe-contracts/contracts/modules/SocialRecoveryModule.sol", "exportedSymbols": { "SocialRecoveryModule": [ 2344 ] }, "id": 2345, "nodeType": "SourceUnit", "nodes": [ { "id": 2081, "literals": [ 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false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "2881:38:19", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "5265636f7665727920686173206e6f7420656e6f75676820636f6e6669726d6174696f6e73", "id": 2263, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "2921:39:19", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_cb12b81371f920ba15a762526f9a95cbe925aecb372a64dbeac8ce5c02e0c0e8", "typeString": "literal_string \"Recovery has not enough confirmations\"" }, "value": "Recovery has not enough confirmations" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_cb12b81371f920ba15a762526f9a95cbe925aecb372a64dbeac8ce5c02e0c0e8", "typeString": 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"typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "src": "2971:27:19", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "id": 2271, "nodeType": "ExpressionStatement", "src": "2971:27:19" }, { "expression": { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "arguments": [ { "argumentTypes": null, "id": 2276, "name": "manager", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 697, "src": "3058:7:19", "typeDescriptions": { "typeIdentifier": "t_contract$_ModuleManager_$1103", "typeString": "contract ModuleManager" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_contract$_ModuleManager_$1103", "typeString": "contract ModuleManager" } ], "id": 2275, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "nodeType": "ElementaryTypeNameExpression", "src": "3050:7:19", "typeDescriptions": { "typeIdentifier": "t_type$_t_address_$", "typeString": "type(address)" }, "typeName": "address" }, "id": 2277, "isConstant": false, "isLValue": false, "isPure": false, "kind": "typeConversion", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3050:16:19", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, { "argumentTypes": null, "hexValue": "30", "id": 2278, "isConstant": false, "isLValue": false, "isPure": true, "kind": "number", "lValueRequested": false, "nodeType": "Literal", "src": "3068:1:19", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, "value": "0" }, { "argumentTypes": null, "id": 2279, "name": "data", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2236, "src": "3071:4:19", "typeDescriptions": { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" } }, { "argumentTypes": null, "expression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 2280, "name": "Enum", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 30, "src": "3077:4:19", "typeDescriptions": { "typeIdentifier": "t_type$_t_contract$_Enum_$30_$", "typeString": "type(contract Enum)" } }, "id": 2281, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "Operation", "nodeType": "MemberAccess", "referencedDeclaration": 29, "src": "3077:14:19", "typeDescriptions": { "typeIdentifier": "t_type$_t_enum$_Operation_$29_$", "typeString": "type(enum Enum.Operation)" } }, "id": 2282, "isConstant": false, "isLValue": false, "isPure": true, "lValueRequested": false, "memberName": "Call", "nodeType": "MemberAccess", "referencedDeclaration": null, "src": "3077:19:19", "typeDescriptions": { "typeIdentifier": "t_enum$_Operation_$29", "typeString": "enum Enum.Operation" } } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_address", "typeString": "address" }, { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" }, { "typeIdentifier": "t_enum$_Operation_$29", "typeString": "enum Enum.Operation" } ], "expression": { "argumentTypes": null, "id": 2273, "name": "manager", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 697, "src": "3016:7:19", "typeDescriptions": { "typeIdentifier": "t_contract$_ModuleManager_$1103", "typeString": "contract ModuleManager" } }, "id": 2274, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "execTransactionFromModule", "nodeType": "MemberAccess", "referencedDeclaration": 930, "src": "3016:33:19", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$_t_enum$_Operation_$29_$returns$_t_bool_$", "typeString": "function (address,uint256,bytes memory,enum Enum.Operation) external returns (bool)" } }, "id": 2283, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3016:81:19", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "436f756c64206e6f742065786563757465207265636f76657279", "id": 2284, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "3099:28:19", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_stringliteral_3515587d60c3ee9920dfa4bee22a25e99aacbb3cec35d7cbe6c839f5b9ffdff1", "typeString": "literal_string \"Could not execute recovery\"" }, "value": "Could not execute recovery" } ], "expression": { "argumentTypes": [ { "typeIdentifier": "t_bool", "typeString": "bool" }, { "typeIdentifier": "t_stringliteral_3515587d60c3ee9920dfa4bee22a25e99aacbb3cec35d7cbe6c839f5b9ffdff1", "typeString": "literal_string \"Could not execute recovery\"" } ], "id": 2272, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 2703, 2704 ], "referencedDeclaration": 2704, "src": "3008:7:19", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 2285, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3008:120:19", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2286, "nodeType": "ExpressionStatement", "src": "3008:120:19" } ] }, "documentation": "@dev Returns if Safe transaction is a valid owner replacement transaction.\n @param prevOwner Owner that pointed to the owner to be replaced in the linked list\n @param oldOwner Owner address to be replaced.\n @param newOwner New owner address.\n @return Returns if transaction can be executed.", "id": 2288, "implemented": true, "isConstructor": false, "isDeclaredConst": false, "modifiers": [ { "arguments": null, "id": 2233, "modifierName": { "argumentTypes": null, "id": 2232, "name": "onlyFriend", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2124, "src": "2611:10:19", "typeDescriptions": { "typeIdentifier": "t_modifier$__$", "typeString": "modifier ()" } }, "nodeType": "ModifierInvocation", "src": "2611:10:19" } ], "name": "recoverAccess", "nodeType": "FunctionDefinition", "parameters": { "id": 2231, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2226, "name": "prevOwner", "nodeType": "VariableDeclaration", "scope": 2288, "src": "2533:17:19", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2225, "name": "address", "nodeType": "ElementaryTypeName", "src": "2533:7:19", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 2228, "name": "oldOwner", "nodeType": "VariableDeclaration", "scope": 2288, "src": "2552:16:19", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2227, "name": "address", "nodeType": "ElementaryTypeName", "src": "2552:7:19", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 2230, "name": "newOwner", "nodeType": "VariableDeclaration", "scope": 2288, "src": "2570:16:19", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2229, "name": "address", "nodeType": "ElementaryTypeName", "src": "2570:7:19", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "2532:55:19" }, "payable": false, "returnParameters": { "id": 2234, "nodeType": "ParameterList", "parameters": [], "src": "2626:0:19" }, "scope": 2344, "src": "2510:625:19", "stateMutability": "nonpayable", "superFunction": null, "visibility": "public" }, { "body": { "id": 2330, "nodeType": "Block", "src": "3407:294:19", "statements": [ { "assignments": [], "declarations": [ { "constant": false, "id": 2296, "name": "confirmationCount", "nodeType": "VariableDeclaration", "scope": 2331, "src": "3417:25:19", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2295, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3417:7:19", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "id": 2297, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "3417:25:19" }, { "body": { "id": 2326, "nodeType": "Block", "src": "3497:176:19", "statements": [ { "condition": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 2309, "name": "isConfirmed", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2112, "src": "3515:11:19", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_bytes32_$_t_mapping$_t_address_$_t_bool_$_$", "typeString": "mapping(bytes32 => mapping(address => bool))" } }, "id": 2311, "indexExpression": { "argumentTypes": null, "id": 2310, "name": "dataHash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2290, "src": "3527:8:19", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3515:21:19", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_bool_$", "typeString": "mapping(address => bool)" } }, "id": 2315, "indexExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 2312, "name": "friends", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2098, "src": "3537:7:19", "typeDescriptions": { "typeIdentifier": "t_array$_t_address_$dyn_storage", "typeString": "address[] storage ref" } }, "id": 2314, "indexExpression": { "argumentTypes": null, "id": 2313, "name": "i", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2299, "src": "3545:1:19", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3537:10:19", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3515:33:19", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 2319, "nodeType": "IfStatement", "src": "3511:74:19", "trueBody": { "expression": { "argumentTypes": null, "id": 2317, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "++", "prefix": false, "src": "3566:19:19", "subExpression": { "argumentTypes": null, "id": 2316, "name": "confirmationCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2296, "src": "3566:17:19", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 2318, "nodeType": "ExpressionStatement", "src": "3566:19:19" } }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2322, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 2320, "name": "confirmationCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2296, "src": "3603:17:19", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "id": 2321, "name": "threshold", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2095, "src": "3624:9:19", "typeDescriptions": { "typeIdentifier": "t_uint8", "typeString": "uint8" } }, "src": "3603:30:19", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 2325, "nodeType": "IfStatement", "src": "3599:63:19", "trueBody": { "expression": { "argumentTypes": null, "hexValue": "74727565", "id": 2323, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "3658:4:19", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 2294, "id": 2324, "nodeType": "Return", "src": "3651:11:19" } } ] }, "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2305, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 2302, "name": "i", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2299, "src": "3472:1:19", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "<", "rightExpression": { "argumentTypes": null, "expression": { "argumentTypes": null, "id": 2303, "name": "friends", "nodeType": "Identifier", 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