Get Exchange Rates

Queries the network for current and 'next' USD/hBar exchange rate (for fee payment calculations).

Note: this information can also be retrieved from any recently executed receipt via the CurrentExchangeRate and NextExchangeRate properties.

class Program
{
    static async Task Main(string[] args)
    {
        // Usage: dotnet run -- https://2.testnet.hedera.com:50211 0.0.5 0.0.20 302e...
        var endpointUrl = args[0];
        EntityId.TryParseShardRealmNum(args[1], out var nodeAccount);
        EntityId.TryParseShardRealmNum(args[2], out var payerAccount);
        var payerPrivateKey = Hex.ToBytes(args[3]);
        try
        {
            await using var client = new ConsensusClient(ctx =>
            {
                ctx.Endpoint = new ConsensusNodeEndpoint(nodeAccount!, new Uri(endpointUrl));
                ctx.Payer = payerAccount;
                ctx.Signatory = new Signatory(payerPrivateKey);
            });

            var rates = await client.GetExchangeRatesAsync();

            if (rates.Current is not null)
            {
                Console.Write($"Current: cent/hBar = {rates.Current.USDCentEquivalent}");
                Console.Write($"/{rates.Current.HBarEquivalent}");
                Console.Write($"  Expires {rates.Current.Expiration}");
                Console.WriteLine();
            }
            if (rates.Next is not null)
            {
                Console.Write($"Next: cent/hBar = {rates.Next.USDCentEquivalent}");
                Console.Write($"/{rates.Next.HBarEquivalent}");
                Console.Write($"  Expires {rates.Next.Expiration}");
                Console.WriteLine();
            }
        }
        catch (Exception ex)
        {
            Console.Error.WriteLine(ex.Message);
            Console.Error.WriteLine(ex.StackTrace);
        }
    }
}

Example output:

    Current: cent/hBar = 12/1  Expires 1/1/2100 12:00:00 AM
    Next: cent/hBar = 15/1  Expires 1/1/2100 12:00:00 AM