Provide c# decimal datatype for gRPC (based on https://visualrecode.com/blog/csharp-decimals-in-grpc/)

DecimalValue.cs

using System.Linq;

namespace YOUR_NAMESPACE_HERE
{
    public partial class DecimalValue
    {
        public DecimalValue(int[] bits) => Bits.AddRange(bits);

        public static implicit operator decimal(DecimalValue decimalValue) => decimalValue.ToDecimal();

        public static implicit operator DecimalValue(decimal value) => FromDecimal(value);

        public decimal ToDecimal() => new decimal(Bits.ToArray());

        public static DecimalValue FromDecimal(decimal value) => new DecimalValue(decimal.GetBits(value));
    }
}

decimalvalue.proto

// Name "DecimalValue" prevents conflict with C# Decimal type
message DecimalValue {
  repeated int32 bits = 1;
}

See https://twitter.com/RobIII/status/1181903337316376576 for good reason NOT to use this.