{ "contractName": "SocialRecoveryModule", "abi": [ { "constant": true, "inputs": [], "name": "threshold", "outputs": [ { "name": "", "type": "uint256" } ], "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": "uint256" } ], "name": "setup", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": 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"source": "pragma solidity 0.4.24;\nimport \"../base/Module.sol\";\nimport \"../base/ModuleManager.sol\";\nimport \"../base/OwnerManager.sol\";\nimport \"../common/Enum.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 = \"0.0.2\";\n\n uint256 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, uint256 _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": [ 2375 ] }, "id": 2376, "nodeType": "SourceUnit", "nodes": [ { "id": 2112, 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"typeString": "address" }, { "typeIdentifier": "t_rational_0_by_1", "typeString": "int_const 0" }, { "typeIdentifier": "t_bytes_memory_ptr", "typeString": "bytes memory" }, { "typeIdentifier": "t_enum$_Operation_$1658", "typeString": "enum Enum.Operation" } ], "expression": { "argumentTypes": null, "id": 2304, "name": "manager", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 900, "src": "3042:7:18", "typeDescriptions": { "typeIdentifier": "t_contract$_ModuleManager_$1212", "typeString": "contract ModuleManager" } }, "id": 2305, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "memberName": "execTransactionFromModule", "nodeType": "MemberAccess", "referencedDeclaration": 1138, "src": "3042:33:18", "typeDescriptions": { "typeIdentifier": "t_function_external_nonpayable$_t_address_$_t_uint256_$_t_bytes_memory_ptr_$_t_enum$_Operation_$1658_$returns$_t_bool_$", "typeString": "function (address,uint256,bytes memory,enum Enum.Operation) external returns (bool)" } }, "id": 2314, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3042:81:18", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, { "argumentTypes": null, "hexValue": "436f756c64206e6f742065786563757465207265636f76657279", "id": 2315, "isConstant": false, "isLValue": false, "isPure": true, "kind": "string", "lValueRequested": false, "nodeType": "Literal", "src": "3125:28:18", "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": 2303, "name": "require", "nodeType": "Identifier", "overloadedDeclarations": [ 4018, 4019 ], "referencedDeclaration": 4019, "src": "3034:7:18", "typeDescriptions": { "typeIdentifier": "t_function_require_pure$_t_bool_$_t_string_memory_ptr_$returns$__$", "typeString": "function (bool,string memory) pure" } }, "id": 2316, "isConstant": false, "isLValue": false, "isPure": false, "kind": "functionCall", "lValueRequested": false, "names": [], "nodeType": "FunctionCall", "src": "3034:120:18", "typeDescriptions": { "typeIdentifier": "t_tuple$__$", "typeString": "tuple()" } }, "id": 2317, "nodeType": "ExpressionStatement", "src": "3034:120:18" } ] }, "documentation": "@dev Returns if Safe transaction is a valid owner replacement transaction.\n @param prevOwner Owner that pointed to the owner to be replaced in the linked list\n @param oldOwner Owner address to be replaced.\n @param newOwner New owner address.\n @return Returns if transaction can be executed.", "id": 2319, "implemented": true, "isConstructor": false, "isDeclaredConst": false, "modifiers": [ { "arguments": null, "id": 2264, "modifierName": { "argumentTypes": null, "id": 2263, "name": "onlyFriend", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2155, "src": "2637:10:18", "typeDescriptions": { "typeIdentifier": "t_modifier$__$", "typeString": "modifier ()" } }, "nodeType": "ModifierInvocation", "src": "2637:10:18" } ], "name": "recoverAccess", "nodeType": "FunctionDefinition", "parameters": { "id": 2262, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 2257, "name": "prevOwner", "nodeType": "VariableDeclaration", "scope": 2319, "src": "2559:17:18", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2256, "name": "address", "nodeType": "ElementaryTypeName", "src": "2559:7:18", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 2259, "name": "oldOwner", "nodeType": "VariableDeclaration", "scope": 2319, "src": "2578:16:18", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2258, "name": "address", "nodeType": "ElementaryTypeName", "src": "2578:7:18", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" }, { "constant": false, "id": 2261, "name": "newOwner", "nodeType": "VariableDeclaration", "scope": 2319, "src": "2596:16:18", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 2260, "name": "address", "nodeType": "ElementaryTypeName", "src": "2596:7:18", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "2558:55:18" }, "payable": false, "returnParameters": { "id": 2265, "nodeType": "ParameterList", "parameters": [], "src": "2652:0:18" }, "scope": 2375, "src": "2536:625:18", "stateMutability": "nonpayable", "superFunction": null, "visibility": "public" }, { "body": { "id": 2361, "nodeType": "Block", "src": "3433:294:18", "statements": [ { "assignments": [], "declarations": [ { "constant": false, "id": 2327, "name": "confirmationCount", "nodeType": "VariableDeclaration", "scope": 2362, "src": "3443:25:18", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "typeName": { "id": 2326, "name": "uint256", "nodeType": "ElementaryTypeName", "src": "3443:7:18", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "value": null, "visibility": "internal" } ], "id": 2328, "initialValue": null, "nodeType": "VariableDeclarationStatement", "src": "3443:25:18" }, { "body": { "id": 2357, "nodeType": "Block", "src": "3523:176:18", "statements": [ { "condition": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 2340, "name": "isConfirmed", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2143, "src": "3541:11:18", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_bytes32_$_t_mapping$_t_address_$_t_bool_$_$", "typeString": "mapping(bytes32 => mapping(address => bool))" } }, "id": 2342, "indexExpression": { "argumentTypes": null, "id": 2341, "name": "dataHash", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2321, "src": "3553:8:18", "typeDescriptions": { "typeIdentifier": "t_bytes32", "typeString": "bytes32" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3541:21:18", "typeDescriptions": { "typeIdentifier": "t_mapping$_t_address_$_t_bool_$", "typeString": "mapping(address => bool)" } }, "id": 2346, "indexExpression": { "argumentTypes": null, "baseExpression": { "argumentTypes": null, "id": 2343, "name": "friends", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2129, "src": "3563:7:18", "typeDescriptions": { "typeIdentifier": "t_array$_t_address_$dyn_storage", "typeString": "address[] storage ref" } }, "id": 2345, "indexExpression": { "argumentTypes": null, "id": 2344, "name": "i", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2330, "src": "3571:1:18", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3563:10:18", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "isConstant": false, "isLValue": true, "isPure": false, "lValueRequested": false, "nodeType": "IndexAccess", "src": "3541:33:18", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 2350, "nodeType": "IfStatement", "src": "3537:74:18", "trueBody": { "expression": { "argumentTypes": null, "id": 2348, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "nodeType": "UnaryOperation", "operator": "++", "prefix": false, "src": "3592:19:18", "subExpression": { "argumentTypes": null, "id": 2347, "name": "confirmationCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2327, "src": "3592:17:18", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 2349, "nodeType": "ExpressionStatement", "src": "3592:19:18" } }, { "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2353, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 2351, "name": "confirmationCount", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2327, "src": "3629:17:18", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "==", "rightExpression": { "argumentTypes": null, "id": 2352, "name": "threshold", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2126, "src": "3650:9:18", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "src": "3629:30:18", "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" } }, "falseBody": null, "id": 2356, "nodeType": "IfStatement", "src": "3625:63:18", "trueBody": { "expression": { "argumentTypes": null, "hexValue": "74727565", "id": 2354, "isConstant": false, "isLValue": false, "isPure": true, "kind": "bool", "lValueRequested": false, "nodeType": "Literal", "src": "3684:4:18", "subdenomination": null, "typeDescriptions": { "typeIdentifier": "t_bool", "typeString": "bool" }, "value": "true" }, "functionReturnParameters": 2325, "id": 2355, "nodeType": "Return", "src": "3677:11:18" } } ] }, "condition": { "argumentTypes": null, "commonType": { "typeIdentifier": "t_uint256", "typeString": "uint256" }, "id": 2336, "isConstant": false, "isLValue": false, "isPure": false, "lValueRequested": false, "leftExpression": { "argumentTypes": null, "id": 2333, "name": "i", "nodeType": "Identifier", "overloadedDeclarations": [], "referencedDeclaration": 2330, "src": "3498:1:18", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "nodeType": "BinaryOperation", "operator": "<", "rightExpression": { "argumentTypes": null, "expression": 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