Define Pyth SDK Price struct

ethereum/contracts/pyth/PythSDK.sol

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+// SPDX-License-Identifier: Apache 2
+
+pragma solidity ^0.8.0;
+
+import "../libraries/external/BytesLib.sol";
+
+contract PythSDK {
+    
+    // Price represents a current aggregation price from pyth publisher feeds.
+    struct Price {
+        // The price ID.
+        bytes32 id;
+        // Product account key.
+        bytes32 productId;
+        // The current price.
+        int64 price;
+        // Confidence interval around the price.
+        uint64 conf;
+        // Price exponent.
+        int32 expo;
+        // Status of price.
+        PriceStatus status;
+        // Maximum number of allowed publishers that can contribute to a price.
+        uint32 maxNumPublishers;
+        // Number of publishers that made up current aggregate.
+        uint32 numPublishers;
+        // Exponentially moving average price.
+        int64 emaPrice;
+        // Exponentially moving average confidence interval.
+        uint64 emaConf;
+    }
+
+    /* PriceStatus represents the availability status of a price feed.
+        UNKNOWN: The price feed is not currently updating for an unknown reason.
+        TRADING: The price feed is updating as expected.
+        HALTED: The price feed is not currently updating because trading in the product has been halted.
+        AUCTION: The price feed is not currently updating because an auction is setting the price.
+    */
+    enum PriceStatus {
+        UNKNOWN,
+        TRADING,
+        HALTED,
+        AUCTION
+    }
+
+}