| | | 1 | | using System.Buffers; |
| | | 2 | | using System.Runtime.Serialization; |
| | | 3 | | using NBitcoin; |
| | | 4 | | using NLightning.Domain.Serialization.Payloads; |
| | | 5 | | |
| | | 6 | | namespace NLightning.Infrastructure.Serialization.Payloads; |
| | | 7 | | |
| | | 8 | | using Converters; |
| | | 9 | | using Domain.Bitcoin.Constants; |
| | | 10 | | using Domain.Protocol.Payloads; |
| | | 11 | | using Domain.Protocol.Payloads.Interfaces; |
| | | 12 | | using Domain.Serialization.Factories; |
| | | 13 | | using Domain.ValueObjects; |
| | | 14 | | using Exceptions; |
| | | 15 | | |
| | | 16 | | public class ShutdownPayloadSerializer : IPayloadSerializer<ShutdownPayload> |
| | | 17 | | { |
| | | 18 | | private readonly IValueObjectSerializerFactory _valueObjectSerializerFactory; |
| | | 19 | | |
| | 4 | 20 | | public ShutdownPayloadSerializer(IValueObjectSerializerFactory valueObjectSerializerFactory) |
| | | 21 | | { |
| | 4 | 22 | | _valueObjectSerializerFactory = valueObjectSerializerFactory; |
| | 4 | 23 | | } |
| | | 24 | | |
| | | 25 | | public async Task SerializeAsync(IMessagePayload payload, Stream stream) |
| | | 26 | | { |
| | 4 | 27 | | if (payload is not ShutdownPayload shutdownPayload) |
| | 0 | 28 | | throw new SerializationException($"Payload is not of type {nameof(ShutdownPayload)}"); |
| | | 29 | | |
| | | 30 | | // Get the value object serializer |
| | 4 | 31 | | var channelIdSerializer = |
| | 4 | 32 | | _valueObjectSerializerFactory.GetSerializer<ChannelId>() |
| | 4 | 33 | | ?? throw new SerializationException($"No serializer found for value object type {nameof(ChannelId)}"); |
| | 4 | 34 | | await channelIdSerializer.SerializeAsync(shutdownPayload.ChannelId, stream); |
| | | 35 | | |
| | 4 | 36 | | await stream.WriteAsync(EndianBitConverter.GetBytesBigEndian(shutdownPayload.ScriptPubkeyLen)); |
| | 4 | 37 | | await stream.WriteAsync(shutdownPayload.ScriptPubkey.ToBytes()); |
| | 4 | 38 | | } |
| | | 39 | | |
| | | 40 | | public async Task<ShutdownPayload?> DeserializeAsync(Stream stream) |
| | | 41 | | { |
| | 4 | 42 | | var buffer = ArrayPool<byte>.Shared.Rent(ScriptConstants.MAX_SCRIPT_SIZE); |
| | | 43 | | |
| | | 44 | | try |
| | | 45 | | { |
| | | 46 | | // Get the value object serializer |
| | 4 | 47 | | var channelIdSerializer = |
| | 4 | 48 | | _valueObjectSerializerFactory.GetSerializer<ChannelId>() |
| | 4 | 49 | | ?? throw new SerializationException($"No serializer found for value object type {nameof(ChannelId)}"); |
| | 4 | 50 | | var channelId = await channelIdSerializer.DeserializeAsync(stream); |
| | | 51 | | |
| | 4 | 52 | | await stream.ReadExactlyAsync(buffer.AsMemory()[..sizeof(ushort)]); |
| | 4 | 53 | | var len = EndianBitConverter.ToUInt16BigEndian(buffer[..sizeof(ushort)]); |
| | | 54 | | |
| | 4 | 55 | | if (len > ScriptConstants.MAX_SCRIPT_SIZE) |
| | 0 | 56 | | throw new SerializationException( |
| | 0 | 57 | | $"ScriptPubkey length {len} exceeds maximum size {ScriptConstants.MAX_SCRIPT_SIZE}"); |
| | | 58 | | |
| | 4 | 59 | | await stream.ReadExactlyAsync(buffer.AsMemory()[..len]); |
| | 4 | 60 | | var scriptPubkey = new Script(buffer[..len]); |
| | | 61 | | |
| | 4 | 62 | | return new ShutdownPayload(channelId, scriptPubkey); |
| | | 63 | | } |
| | 0 | 64 | | catch (Exception e) |
| | | 65 | | { |
| | 0 | 66 | | throw new PayloadSerializationException($"Error deserializing {nameof(ShutdownPayload)}", e); |
| | | 67 | | } |
| | | 68 | | finally |
| | | 69 | | { |
| | 4 | 70 | | ArrayPool<byte>.Shared.Return(buffer); |
| | | 71 | | } |
| | 4 | 72 | | } |
| | | 73 | | |
| | | 74 | | async Task<IMessagePayload?> IPayloadSerializer.DeserializeAsync(Stream stream) |
| | | 75 | | { |
| | 0 | 76 | | return await DeserializeAsync(stream); |
| | 0 | 77 | | } |
| | | 78 | | } |