{ "contractName": "StablePriceOracle", "abi": [ { "inputs": [ { "internalType": "contract AggregatorInterface", "name": "_usdOracle", "type": "address" }, { "internalType": "uint256[]", "name": "_rentPrices", "type": "uint256[]" } ], "payable": false, "stateMutability": "nonpayable", "type": "constructor" }, { "anonymous": false, "inputs": [ { "indexed": false, "internalType": "address", "name": "oracle", "type": "address" } ], "name": "OracleChanged", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": true, "internalType": "address", "name": "previousOwner", "type": "address" }, { "indexed": true, "internalType": "address", "name": "newOwner", "type": "address" } ], "name": "OwnershipTransferred", "type": "event" }, { "anonymous": false, "inputs": [ { "indexed": false, "internalType": "uint256[]", "name": "prices", "type": "uint256[]" } ], "name": "RentPriceChanged", "type": "event" }, { "constant": true, "inputs": [], "name": "isOwner", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [], "name": "owner", "outputs": [ { "internalType": "address", "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [], "name": "renounceOwnership", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "name": "rentPrices", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "address", "name": "newOwner", "type": "address" } ], "name": "transferOwnership", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [], "name": "usdOracle", "outputs": [ { "internalType": "contract AggregatorInterface", "name": "", "type": "address" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "string", "name": "name", "type": "string" }, { "internalType": "uint256", "name": "expires", "type": "uint256" }, { "internalType": "uint256", "name": "duration", "type": "uint256" } ], "name": "price", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "uint256[]", "name": "_rentPrices", "type": "uint256[]" } ], "name": "setPrices", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": false, "inputs": [ { "internalType": "contract AggregatorInterface", "name": "_usdOracle", "type": "address" } ], "name": "setOracle", "outputs": [], "payable": false, "stateMutability": "nonpayable", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "string", "name": "name", "type": "string" }, { "internalType": "uint256", "name": "expires", "type": "uint256" }, { "internalType": "uint256", "name": "duration", "type": "uint256" } ], "name": "premium", "outputs": [ { "internalType": "uint256", "name": "", "type": "uint256" } ], "payable": false, "stateMutability": "view", "type": "function" }, { "constant": true, "inputs": [ { "internalType": "bytes4", "name": "interfaceID", "type": "bytes4" } ], "name": "supportsInterface", "outputs": [ { "internalType": "bool", "name": "", "type": "bool" } ], "payable": false, "stateMutability": "view", "type": "function" } ], "metadata": "{\"compiler\":{\"version\":\"0.5.16+commit.9c3226ce\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[{\"internalType\":\"contract AggregatorInterface\",\"name\":\"_usdOracle\",\"type\":\"address\"},{\"internalType\":\"uint256[]\",\"name\":\"_rentPrices\",\"type\":\"uint256[]\"}],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"address\",\"name\":\"oracle\",\"type\":\"address\"}],\"name\":\"OracleChanged\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"previousOwner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"OwnershipTransferred\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":false,\"internalType\":\"uint256[]\",\"name\":\"prices\",\"type\":\"uint256[]\"}],\"name\":\"RentPriceChanged\",\"type\":\"event\"},{\"constant\":true,\"inputs\":[],\"name\":\"isOwner\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"internalType\":\"string\",\"name\":\"name\",\"type\":\"string\"},{\"internalType\":\"uint256\",\"name\":\"expires\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"duration\",\"type\":\"uint256\"}],\"name\":\"premium\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"internalType\":\"string\",\"name\":\"name\",\"type\":\"string\"},{\"internalType\":\"uint256\",\"name\":\"expires\",\"type\":\"uint256\"},{\"internalType\":\"uint256\",\"name\":\"duration\",\"type\":\"uint256\"}],\"name\":\"price\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[],\"name\":\"renounceOwnership\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"name\":\"rentPrices\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"contract AggregatorInterface\",\"name\":\"_usdOracle\",\"type\":\"address\"}],\"name\":\"setOracle\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"uint256[]\",\"name\":\"_rentPrices\",\"type\":\"uint256[]\"}],\"name\":\"setPrices\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[{\"internalType\":\"bytes4\",\"name\":\"interfaceID\",\"type\":\"bytes4\"}],\"name\":\"supportsInterface\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"},{\"constant\":false,\"inputs\":[{\"internalType\":\"address\",\"name\":\"newOwner\",\"type\":\"address\"}],\"name\":\"transferOwnership\",\"outputs\":[],\"payable\":false,\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"constant\":true,\"inputs\":[],\"name\":\"usdOracle\",\"outputs\":[{\"internalType\":\"contract AggregatorInterface\",\"name\":\"\",\"type\":\"address\"}],\"payable\":false,\"stateMutability\":\"view\",\"type\":\"function\"}],\"devdoc\":{\"methods\":{\"isOwner()\":{\"return\":\"true if `msg.sender` is the owner of the contract.\"},\"owner()\":{\"return\":\"the address of the owner.\"},\"premium(string,uint256,uint256)\":{\"details\":\"Returns the pricing premium in wei.\"},\"renounceOwnership()\":{\"details\":\"Allows the current owner to relinquish control of the contract.\"},\"setOracle(address)\":{\"details\":\"Sets the price oracle address\",\"params\":{\"_usdOracle\":\"The address of the price oracle to use.\"}},\"setPrices(uint256[])\":{\"details\":\"Sets rent prices.\",\"params\":{\"_rentPrices\":\"The price array. Each element corresponds to a specific name length; names longer than the length of the array default to the price of the last element. Values are in base price units, equal to one attodollar (1e-18 dollar) each.\"}},\"transferOwnership(address)\":{\"details\":\"Allows the current owner to transfer control of the contract to a newOwner.\",\"params\":{\"newOwner\":\"The address to transfer ownership to.\"}}}},\"userdoc\":{\"methods\":{\"renounceOwnership()\":{\"notice\":\"Renouncing to ownership will leave the contract without an owner. It will not be possible to call the functions with the `onlyOwner` modifier 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"source": "pragma solidity >=0.5.0;\n\nimport \"./PriceOracle.sol\";\nimport \"./SafeMath.sol\";\nimport \"./StringUtils.sol\";\nimport \"openzeppelin-solidity/contracts/ownership/Ownable.sol\";\n\ninterface AggregatorInterface {\n function latestAnswer() external view returns (int256);\n}\n\n\n// StablePriceOracle sets a price in USD, based on an oracle.\ncontract StablePriceOracle is Ownable, PriceOracle {\n using SafeMath for *;\n using StringUtils for *;\n\n // Rent in base price units by length. Element 0 is for 1-length names, and so on.\n uint[] public rentPrices;\n\n // Oracle address\n AggregatorInterface public usdOracle;\n\n event OracleChanged(address oracle);\n\n event RentPriceChanged(uint[] prices);\n\n bytes4 constant private INTERFACE_META_ID = bytes4(keccak256(\"supportsInterface(bytes4)\"));\n bytes4 constant private ORACLE_ID = bytes4(keccak256(\"price(string,uint256,uint256)\") ^ keccak256(\"premium(string,uint256,uint256)\"));\n\n constructor(AggregatorInterface _usdOracle, uint[] memory _rentPrices) public {\n usdOracle = _usdOracle;\n setPrices(_rentPrices);\n }\n\n function price(string calldata name, uint expires, uint duration) external view returns(uint) {\n uint len = name.strlen();\n if(len > rentPrices.length) {\n len = rentPrices.length;\n }\n require(len > 0);\n \n uint basePrice = rentPrices[len - 1].mul(duration);\n basePrice = basePrice.add(_premium(name, expires, duration));\n\n return attoUSDToWei(basePrice);\n }\n\n /**\n * @dev Sets rent prices.\n * @param _rentPrices The price array. Each element corresponds to a specific\n * name length; names longer than the length of the array\n * default to the price of the last element. Values are\n * in base price units, equal to one attodollar (1e-18\n * dollar) each.\n */\n function setPrices(uint[] memory _rentPrices) public onlyOwner {\n rentPrices = _rentPrices;\n emit RentPriceChanged(_rentPrices);\n }\n\n /**\n * @dev Sets the price oracle address\n * @param _usdOracle The address of the price oracle to use.\n */\n function setOracle(AggregatorInterface _usdOracle) public onlyOwner {\n usdOracle = _usdOracle;\n emit OracleChanged(address(_usdOracle));\n }\n\n /**\n * @dev Returns the pricing premium in wei.\n */\n function premium(string calldata name, uint expires, uint duration) external view returns(uint) {\n return attoUSDToWei(_premium(name, expires, duration));\n }\n\n /**\n * @dev Returns the pricing premium in internal base units.\n */\n function _premium(string memory name, uint expires, uint duration) internal view returns(uint) {\n return 0;\n }\n\n function attoUSDToWei(uint amount) internal view returns(uint) {\n uint ethPrice = uint(usdOracle.latestAnswer());\n return amount.mul(1e8).div(ethPrice);\n }\n\n function weiToAttoUSD(uint amount) internal view returns(uint) {\n uint ethPrice = uint(usdOracle.latestAnswer());\n return amount.mul(ethPrice).div(1e8);\n }\n\n function supportsInterface(bytes4 interfaceID) public view returns (bool) {\n return interfaceID == INTERFACE_META_ID || interfaceID == ORACLE_ID;\n }\n}\n", "sourcePath": "/Users/makoto/work/ens/ethregistrar/contracts/StablePriceOracle.sol", "ast": { "absolutePath": "/Users/makoto/work/ens/ethregistrar/contracts/StablePriceOracle.sol", "exportedSymbols": { "AggregatorInterface": [ 4065 ], "StablePriceOracle": [ 4317 ] }, "id": 4318, "nodeType": "SourceUnit", "nodes": [ { "id": 4055, "literals": [ "solidity", ">=", "0.5", ".0" ], "nodeType": "PragmaDirective", "src": "0:24:13" }, { "absolutePath": "/Users/makoto/work/ens/ethregistrar/contracts/PriceOracle.sol", "file": "./PriceOracle.sol", "id": 4056, "nodeType": "ImportDirective", "scope": 4318, "sourceUnit": 2279, "src": "26:27:13", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/Users/makoto/work/ens/ethregistrar/contracts/SafeMath.sol", "file": "./SafeMath.sol", "id": 4057, "nodeType": "ImportDirective", "scope": 4318, "sourceUnit": 2902, "src": "54:24:13", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "/Users/makoto/work/ens/ethregistrar/contracts/StringUtils.sol", "file": "./StringUtils.sol", "id": 4058, "nodeType": "ImportDirective", "scope": 4318, "sourceUnit": 4415, "src": "79:27:13", "symbolAliases": [], "unitAlias": "" }, { "absolutePath": "openzeppelin-solidity/contracts/ownership/Ownable.sol", "file": "openzeppelin-solidity/contracts/ownership/Ownable.sol", "id": 4059, "nodeType": "ImportDirective", "scope": 4318, "sourceUnit": 12299, "src": "107:63:13", "symbolAliases": [], "unitAlias": "" }, { "baseContracts": [], "contractDependencies": [], "contractKind": "interface", "documentation": null, "fullyImplemented": false, "id": 4065, "linearizedBaseContracts": [ 4065 ], "name": "AggregatorInterface", "nodeType": "ContractDefinition", "nodes": [ { "body": null, "documentation": null, "id": 4064, "implemented": false, "kind": "function", "modifiers": [], "name": "latestAnswer", "nodeType": "FunctionDefinition", "parameters": { "id": 4060, "nodeType": "ParameterList", "parameters": [], "src": "227:2:13" }, "returnParameters": { "id": 4063, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4062, "name": "", "nodeType": "VariableDeclaration", "scope": 4064, "src": "253:6:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_int256", "typeString": "int256" }, "typeName": { "id": 4061, "name": "int256", "nodeType": "ElementaryTypeName", "src": "253:6:13", "typeDescriptions": { "typeIdentifier": "t_int256", "typeString": "int256" } }, "value": null, "visibility": "internal" } ], "src": "252:8:13" }, "scope": 4065, "src": "206:55:13", "stateMutability": "view", "superFunction": null, "visibility": "external" } ], "scope": 4318, "src": "172:91:13" }, { "baseContracts": [ { "arguments": null, "baseName": { "contractScope": null, "id": 4066, "name": "Ownable", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 12298, "src": "358:7:13", "typeDescriptions": { "typeIdentifier": "t_contract$_Ownable_$12298", "typeString": "contract Ownable" } }, "id": 4067, "nodeType": "InheritanceSpecifier", "src": "358:7:13" }, { "arguments": null, "baseName": { "contractScope": null, "id": 4068, "name": "PriceOracle", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 2278, "src": "367:11:13", "typeDescriptions": { "typeIdentifier": "t_contract$_PriceOracle_$2278", "typeString": "contract PriceOracle" } }, "id": 4069, "nodeType": "InheritanceSpecifier", "src": "367:11:13" } ], "contractDependencies": [ 2278, 12298 ], "contractKind": "contract", "documentation": null, "fullyImplemented": true, "id": 4317, "linearizedBaseContracts": [ 4317, 2278, 12298 ], "name": "StablePriceOracle", "nodeType": "ContractDefinition", "nodes": [ { "id": 4071, "libraryName": { "contractScope": null, "id": 4070, "name": "SafeMath", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 2901, "src": "391:8:13", "typeDescriptions": { "typeIdentifier": "t_contract$_SafeMath_$2901", "typeString": "library SafeMath" } }, "nodeType": "UsingForDirective", "src": "385:21:13", "typeName": null }, { "id": 4073, "libraryName": { "contractScope": null, "id": 4072, "name": "StringUtils", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 4414, "src": "417:11:13", "typeDescriptions": { "typeIdentifier": "t_contract$_StringUtils_$4414", "typeString": "library StringUtils" } }, "nodeType": "UsingForDirective", "src": "411:24:13", "typeName": null }, { "constant": false, "id": 4076, "name": "rentPrices", "nodeType": "VariableDeclaration", "scope": 4317, "src": "528:24:13", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_array$_t_uint256_$dyn_storage", "typeString": "uint256[]" }, "typeName": { "baseType": { "id": 4074, "name": "uint", "nodeType": "ElementaryTypeName", "src": "528:4:13", "typeDescriptions": { "typeIdentifier": "t_uint256", "typeString": "uint256" } }, "id": 4075, "length": null, "nodeType": "ArrayTypeName", "src": "528:6:13", "typeDescriptions": { "typeIdentifier": "t_array$_t_uint256_$dyn_storage_ptr", "typeString": "uint256[]" } }, "value": null, "visibility": "public" }, { "constant": false, "id": 4078, "name": "usdOracle", "nodeType": "VariableDeclaration", "scope": 4317, "src": "581:36:13", "stateVariable": true, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_contract$_AggregatorInterface_$4065", "typeString": "contract AggregatorInterface" }, "typeName": { "contractScope": null, "id": 4077, "name": "AggregatorInterface", "nodeType": "UserDefinedTypeName", "referencedDeclaration": 4065, "src": "581:19:13", "typeDescriptions": { "typeIdentifier": "t_contract$_AggregatorInterface_$4065", "typeString": "contract AggregatorInterface" } }, "value": null, "visibility": "public" }, { "anonymous": false, "documentation": null, "id": 4082, "name": "OracleChanged", "nodeType": "EventDefinition", "parameters": { "id": 4081, "nodeType": "ParameterList", "parameters": [ { "constant": false, "id": 4080, "indexed": false, "name": "oracle", "nodeType": "VariableDeclaration", "scope": 4082, "src": "644:14:13", "stateVariable": false, "storageLocation": "default", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" }, "typeName": { "id": 4079, "name": "address", "nodeType": "ElementaryTypeName", "src": "644:7:13", "stateMutability": "nonpayable", "typeDescriptions": { "typeIdentifier": "t_address", "typeString": "address" } }, "value": null, "visibility": "internal" } ], "src": "643:16:13" }, "src": "624:36:13" }, { "anonymous": false, "documentation": null, "id": 4087, "name": 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