safe-react/safe-contracts/build/contracts/SocialRecoveryModule.json

{
  "contractName": "SocialRecoveryModule",
  "abi": [
    {
      "constant": true,
      "inputs": [],
      "name": "REPLACE_OWNER_FUNCTION_IDENTIFIER",
      "outputs": [
        {
          "name": "",
          "type": "bytes4"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "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": "function"
    },
    {
      "constant": false,
      "inputs": [
        {
          "name": "dataHash",
          "type": "bytes32"
        }
      ],
      "name": "confirmTransaction",
      "outputs": [],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "constant": false,
      "inputs": [
        {
          "name": "data",
          "type": "bytes"
        }
      ],
      "name": "recoverAccess",
      "outputs": [],
      "payable": false,
      "stateMutability": "nonpayable",
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [
        {
          "name": "dataHash",
          "type": "bytes32"
        }
      ],
      "name": "isConfirmedByRequiredFriends",
      "outputs": [
        {
          "name": "",
          "type": "bool"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    },
    {
      "constant": true,
      "inputs": [
        {
          "name": "data",
          "type": "bytes"
        }
      ],
      "name": "getDataHash",
      "outputs": [
        {
          "name": "",
          "type": "bytes32"
        }
      ],
      "payable": false,
      "stateMutability": "view",
      "type": "function"
    }
  ],
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  "source": "pragma solidity 0.4.23;\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 - <stefan@gnosis.pm>\ncontract SocialRecoveryModule is Module {\n\n    string public constant NAME = \"Social Recovery Module\";\n    string public constant VERSION = \"0.0.1\";\n    bytes4 public constant REPLACE_OWNER_FUNCTION_IDENTIFIER = hex\"e318b52b\";\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]);\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);\n        require(_threshold >= 2);\n        setManager();\n        // Set allowed friends.\n        for (uint256 i = 0; i < _friends.length; i++) {\n            address friend = _friends[i];\n            require(friend != 0);\n            require(!isFriend[friend]);\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]);\n        isConfirmed[dataHash][msg.sender] = true;\n    }\n\n    /// @dev Returns if Safe transaction is a valid owner replacement transaction.\n    /// @param data Encoded owner replacement transaction.\n    /// @return Returns if transaction can be executed.\n    function recoverAccess(bytes data)\n        public\n    {\n        // Only friends are allowed to execute the replacement.\n        require(isFriend[msg.sender]);\n        // Validate that transaction is a owner replacement transaction.\n        bytes4 functionIdentifier;\n        // solium-disable-next-line security/no-inline-assembly\n        assembly {\n            functionIdentifier := mload(add(data, 0x20))\n        }\n        require(functionIdentifier == REPLACE_OWNER_FUNCTION_IDENTIFIER);\n        bytes32 dataHash = getDataHash(data);\n        require(!isExecuted[dataHash]);\n        require(isConfirmedByRequiredFriends(dataHash));\n        isExecuted[dataHash] = true;\n        require(manager.execTransactionFromModule(address(manager), 0, data, Enum.Operation.Call));\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        view\n        returns (bytes32)\n    {\n        return keccak256(data);\n    }\n}\n",
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