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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. 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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, 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