private static void GetPriceByProvider(UInt160 provider, byte[] recordKey, Map <UInt160, string> priceMap)
{
StorageMap priceList = new(Storage.CurrentContext, provider);
if (priceList[recordKey] is null)
{
throw new Exception("The price of the symbol and blockIndex does not exist");
}
PriceState price = (PriceState)StdLib.Deserialize(priceList[recordKey]);
price.EnsureNotExpired();
priceMap[provider] = price.CurrentPrice;
}
public static void UpdatePriceByProvider(string blockIndex, string symbol, string currentPrice)
{
if (Symbols[symbol] is null)
{
throw new Exception("Symbol has not registered.");
}
UInt160 provider = Runtime.CallingScriptHash;
if (Providers[provider] is null)
{
throw new Exception("No such provider registered");
}
StorageMap priceList = new(Storage.CurrentContext, provider);
PriceState state = new PriceState
{
CurrentPrice = currentPrice,
Expiration = Runtime.Time + OneYear
};
byte[] key = Helper.Concat((byte[])GetKey(symbol), (byte[])GetKey(blockIndex));
Storage.Put(Storage.CurrentContext, new byte[] { Prefix_Block }, blockIndex);
priceList.Put(key, StdLib.Serialize(state));
}