pragma solidity ^0.6.7; import "@chainlink/contracts/src/v0.6/interfaces/AggregatorV3Interface.sol"; contract PriceConsumerV3 { AggregatorV3Interface internal priceFeed; /** * Network: Kovan * Aggregator: ETH/USD * Address: 0x9326BFA02ADD2366b30bacB125260Af641031331 */ constructor() public { priceFeed = AggregatorV3Interface(0x9326BFA02ADD2366b30bacB125260Af641031331); } /** * Returns the latest price */ function getThePrice() public view returns (int) { ( uint80 roundID, int price, uint startedAt, uint timeStamp, uint80 answeredInRound ) = priceFeed.latestRoundData(); return price; } }
代码中，price的类型是int类型，为什么用的是包含负数的类型来表示价格数据呢？
