C# MessagePackMember Attribute Deserialize bug

[germwire]

[MessagePackMember(1, Name = "fees", NilImplication = NilImplication.MemberDefault)] public decimal Fees { get; set; }

ERROR:

{"The unpacked value is not expected type. Do not convert System.Byte (binary:0x0) MessagePackObject to MsgPack.MessagePackString."} The unpacked value is not expected type. Do not convert System.Byte (binary:0x0) MessagePackObject to MsgPack.MessagePackString. at MsgPack.Serialization.DefaultSerializers.System_DecimalMessagePackSerializer.UnpackFromCore(Unpacker unpacker) at MsgPack.Serialization.MessagePackSerializer1.UnpackFrom(Unpacker unpacker) at MsgPack.Serialization.UnpackHelpers.UnpackComplexObject[T](Unpacker unpacker, MessagePackSerializer1 serializer, Int32 unpacked) at MsgPack.Serialization.UnpackHelpers.UnpackValueTypeValueCoreTContext,TValue at MsgPack.Serialization.UnpackHelpers.UnpackValueTypeValueTContext,TValue at MsgPack.Serialization.EmittingSerializers.Generated.####_Models_OrderSerializer1.UnpackValueOfprocessingFee(Unpacker , Order , Int32 , Int32 ) at MsgPack.Serialization.UnpackHelpers.UnpackFromMapCoreTContext,TResult at MsgPack.Serialization.UnpackHelpers.UnpackFromMapTContext,TResult at MsgPack.Serialization.UnpackHelpers.UnpackFromMapTContext,TResult at MsgPack.Serialization.EmittingSerializers.Generated.####_Models_OrderSerializer1.UnpackFromCore(Unpacker ) at MsgPack.Serialization.MessagePackSerializer`1.UnpackFrom(Unpacker unpacker)

[avram]

It looks like decimals aren't supported (https://github.com/scopely/msgpack-sharp/blob/eef2661f466ec1a341486b3011e0f68feb708396/msgpack-sharp/MsgPackIO.cs#L907)

@Claytonious can you confirm?

[Claytonious]

Correct.

On Wed, Oct 12, 2016, 9:10 AM Avram Lyon [email protected] wrote:

It looks like decimals aren't supported ( https://github.com/scopely/msgpack-sharp/blob/eef2661f466ec1a341486b3011e0f68feb708396/msgpack-sharp/MsgPackIO.cs#L907 )

@Claytonious https://github.com/Claytonious can you confirm?

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[avram]

It also appears that MessagePack doesn't have a standard decimal representation: https://github.com/msgpack/msgpack/blob/master/spec.md#formats

[germwire]

I need decimal calculations for money math arithmetic. Is there an alternative?

[avram]

So with vanilla MessagePack, other types are usually packed using the ext type: https://github.com/msgpack/msgpack/blob/master/spec.md#ext-format-family

msgpack-sharp doesn't currently have a mechanism for registering serializations into the ext family, but that would be the logical direction to go.