{ "contractName": "Vouching", "abi": [ { "anonymous": false, "inputs": [ { "indexed": true, "name": "oldOwner", "type": "address" }, { "indexed": true, "name": "newOwner", "type": "address" } ], "name": "OwnershipTransferred", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "nameHash", "type": "bytes32" }, { "indexed": false, "name": "name", "type": "string" }, { "indexed": true, "name": "owner", "type": "address" }, { "indexed": true, "name": "dependencyAddress", "type": "address" }, { "indexed": false, "name": "initialStake", "type": "uint256" } ], "name": "DependencyCreated", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "nameHash", "type": "bytes32" }, { "indexed": false, "name": "amount", "type": "uint256" } ], "name": "Vouched", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "nameHash", "type": "bytes32" }, { "indexed": false, "name": "amount", "type": "uint256" } ], "name": "Unvouched", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "name": "nameHash", "type": "bytes32" } ], "name": "DependencyRemoved", "type": "event" }, { "constant": false, "inputs": [ { "name": "minimumStake", "type": "uint256" }, { "name": "token", "type": "address" } ], "name": "initialize", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [], "name": "minimumStake", "outputs": [ { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "token", "outputs": [ { "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "name": "name", "type": "string" } ], "name": "getDependency", "outputs": [ { "name": "", "type": "address" }, { "name": "", "type": "address" }, { "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "name": "name", "type": "string" }, { "name": "owner", "type": "address" }, { "name": "dependencyAddress", "type": "address" }, { "name": "initialStake", "type": "uint256" } ], "name": "create", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "name": "name", "type": "string" }, { "name": "newOwner", "type": "address" } ], "name": "transferOwnership", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "name": "name", "type": "string" }, { "name": "amount", "type": "uint256" } ], "name": "vouch", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "name": "name", "type": "string" }, { "name": "amount", "type": "uint256" } ], "name": "unvouch", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "name": "name", "type": "string" } ], "name": "remove", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" } ], "bytecode": 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"source": "pragma solidity ^0.4.24;\n\n\nimport \"zos-lib/contracts/Initializable.sol\";\nimport \"openzeppelin-eth/contracts/token/ERC20/ERC20.sol\";\nimport \"openzeppelin-eth/contracts/token/ERC20/SafeERC20.sol\";\nimport \"openzeppelin-eth/contracts/math/SafeMath.sol\";\nimport \"openzeppelin-eth/contracts/utils/Address.sol\";\n\ncontract Vouching is Initializable {\n event OwnershipTransferred(address indexed oldOwner, address indexed newOwner);\n event DependencyCreated(\n bytes32 indexed nameHash,\n string name,\n address indexed owner,\n address indexed dependencyAddress,\n uint256 initialStake\n );\n event Vouched(bytes32 indexed nameHash, uint256 amount);\n event Unvouched(bytes32 indexed nameHash, uint256 amount);\n event DependencyRemoved(bytes32 indexed nameHash);\n\n using SafeMath for uint256;\n using SafeERC20 for ERC20;\n using Address for address;\n\n struct Dependency {\n address owner;\n address dependencyAddress;\n uint256 stake;\n }\n\n mapping (string => Dependency) private _registry;\n mapping (string => bool) private _takenDependencyNames;\n uint256 private _minimumStake;\n ERC20 private _token;\n\n modifier onlyDependencyOwner(string name) {\n require(msg.sender == _registry[name].owner, \"Sender must be the dependency owner\");\n _;\n }\n\n function initialize(uint256 minimumStake, ERC20 token) initializer public {\n require(token != address(0), \"Token address cannot be zero\");\n _minimumStake = minimumStake;\n _token = token;\n }\n\n function minimumStake() public view returns(uint256) {\n return _minimumStake;\n }\n\n function token() public view returns(ERC20) {\n return _token;\n }\n\n function getDependency(string name) public view returns(address, address, uint256) {\n return (\n _registry[name].dependencyAddress,\n _registry[name].owner,\n _registry[name].stake\n );\n }\n\n function create(string name, address owner, address dependencyAddress, uint256 initialStake) external {\n require(initialStake >= _minimumStake, \"Initial stake must be equal or greater than minimum stake\");\n require(owner != address(0), \"Owner address cannot be zero\");\n require(dependencyAddress != address(0), \"Dependency address cannot be zero\");\n require(dependencyAddress.isContract(), \"Dependencies must be contracts\");\n require(!_takenDependencyNames[name], \"Given dependency name is already registered\");\n\n _takenDependencyNames[name] = true;\n _registry[name] = Dependency(owner, dependencyAddress, initialStake);\n\n _token.safeTransferFrom(owner, this, initialStake);\n\n emit DependencyCreated(keccak256(abi.encodePacked(name)), name, owner, dependencyAddress, initialStake);\n }\n\n function transferOwnership(string name, address newOwner) external onlyDependencyOwner(name) {\n require(newOwner != address(0), \"New owner address cannot be zero\");\n _registry[name].owner = newOwner;\n emit OwnershipTransferred(msg.sender, newOwner);\n }\n\n function vouch(string name, uint256 amount) external onlyDependencyOwner(name) {\n _registry[name].stake = _registry[name].stake.add(amount);\n _token.safeTransferFrom(msg.sender, this, amount);\n emit Vouched(keccak256(abi.encodePacked(name)), amount);\n }\n\n function unvouch(string name, uint256 amount) external onlyDependencyOwner(name) {\n uint256 remainingStake = _registry[name].stake.sub(amount);\n require(remainingStake >= _minimumStake, \"Remaining stake must be equal or greater than minimum stake\");\n\n _registry[name].stake = remainingStake;\n _token.safeTransfer(msg.sender, amount);\n\n emit Unvouched(keccak256(abi.encodePacked(name)), amount);\n }\n\n function remove(string name) external onlyDependencyOwner(name) {\n // Owner surrenders _minimumStake to the system\n uint256 reimbursedAmount = _registry[name].stake.sub(_minimumStake);\n\n // The entry is not removed from _takenDependencyNames, to prevent a new dependecy\n // from reusing the same name\n delete _registry[name];\n\n _token.safeTransfer(msg.sender, reimbursedAmount);\n emit DependencyRemoved(keccak256(abi.encodePacked(name)));\n }\n\n}\n\n", "sourcePath": "/Users/connor/Documents/git/zos/packages/vouching/contracts/Vouching.sol", "ast": { "absolutePath": "/Users/connor/Documents/git/zos/packages/vouching/contracts/Vouching.sol", "exportedSymbols": { "Vouching": [ 416 ] }, "id": 417, "nodeType": "SourceUnit", "nodes": [ { "id": 1, "literals": [ "solidity", "^", "0.4", ".24" ], "nodeType": "PragmaDirective", "src": "0:24:0" }, { "absolutePath": "zos-lib/contracts/Initializable.sol", "file": "zos-lib/contracts/Initializable.sol", "id": 2, "nodeType": "ImportDirective", "scope": 417, "sourceUnit": 1919, "src": "27:45:0", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "openzeppelin-eth/contracts/token/ERC20/ERC20.sol", "file": "openzeppelin-eth/contracts/token/ERC20/ERC20.sol", "id": 3, "nodeType": "ImportDirective", "scope": 417, "sourceUnit": 1354, "src": "73:58:0", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "openzeppelin-eth/contracts/token/ERC20/SafeERC20.sol", "file": "openzeppelin-eth/contracts/token/ERC20/SafeERC20.sol", "id": 4, "nodeType": "ImportDirective", "scope": 417, "sourceUnit": 1675, "src": "132:62:0", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "openzeppelin-eth/contracts/math/SafeMath.sol", "file": "openzeppelin-eth/contracts/math/SafeMath.sol", "id": 5, "nodeType": "ImportDirective", "scope": 417, "sourceUnit": 903, "src": "195:54:0", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "openzeppelin-eth/contracts/utils/Address.sol", "file": "openzeppelin-eth/contracts/utils/Address.sol", "id": 6, "nodeType": "ImportDirective", "scope": 417, "sourceUnit": 1694, "src": "250:54:0", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 7, "name": "Initializable", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 1918, "src": "327:13:0", "typeDescriptions": { "typeIdentifier": "t_contract$_Initializable_$1918", "typeString": "contract Initializable" } }, "id": 8, "nodeType": "InheritanceSpecifier", "src": "327:13:0" } ], "contractDependencies": [ 1918 ], "contractKind": "contract", "documentation": null, "fullyImplemented": true, "id": 416, "linearizedBaseContracts": [ 416, 1918 ], "name": "Vouching", "nodeType": "ContractDefinition", "nodes": [ { "anonymous": false, "documentation": null, "id": 14, "name": "OwnershipTransferred", "nodeType": "EventDefinition", "parameters": { "id": 13, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 10, "indexed": true, "name": "oldOwner", "nodeType": "VariableDeclaration", "scope": 14, "src": "372:24:0", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 9, "name": "address", "nodeType": "ElementaryTypeName", "src": "372:7:0", "typeDescriptions": { "typeIdentifier": "t_address", 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