根据评论中的讨论，我已经设法解组了数据。

• • 备注**：
• 数据前缀为5字节（这是完全不必要的）：
• 消息类型为1个字节
• 数据长度为4个字节
• C#实现使用特定于C#的decimal和Guid数据类型。（正如bcl.proto中所评论的，跨平台代码通常应该完全避免它们）。

下面是文件夹结构：

├── bcl.proto
├── execution.proto
├── go.mod
├── go.sum
├── main.go
└── protos
    ├── bcl.pb.go
    └── execution.pb.go

• • bcl.proto**：

此文件是从github.com/protobuf-net/protobuf-net复制的。它是必需的，因为. NET实现使用此proto文件中的Decimal和Guid。

// The types in here indicate how protobuf-net represents certain types when using protobuf-net specific
// library features. Note that it is not *required* to use any of these types, and cross-platform code
// should usually avoid them completely (ideally starting from a .proto schema)

// Some of these are ugly, sorry. The TimeSpan / DateTime dates here pre-date the introduction of Timestamp
// and Duration, and the "well known" types should be preferred when possible. Guids are particularly
// awkward - it turns out that there are multiple guid representations, and I accidentally used one that
// I can only call... "crazy-endian". Just make sure you check the order!

// It should not be necessary to use bcl.proto from code that uses protobuf-net

syntax = "proto3";

option csharp_namespace = "ProtoBuf.Bcl";
option go_package = "./protos";

package bcl;

message TimeSpan {
  sint64 value = 1; // the size of the timespan (in units of the selected scale)
  TimeSpanScale scale = 2; // the scale of the timespan [default = DAYS]
  enum TimeSpanScale {
    DAYS = 0;
    HOURS = 1;
    MINUTES = 2;
    SECONDS = 3;
    MILLISECONDS = 4;
    TICKS = 5;

    MINMAX = 15; // dubious
  }
}

message DateTime {
  sint64 value = 1; // the offset (in units of the selected scale) from 1970/01/01
  TimeSpanScale scale = 2; // the scale of the timespan [default = DAYS]
  DateTimeKind kind = 3; // the kind of date/time being represented [default = UNSPECIFIED]
  enum TimeSpanScale {
    DAYS = 0;
    HOURS = 1;
    MINUTES = 2;
    SECONDS = 3;
    MILLISECONDS = 4;
    TICKS = 5;

    MINMAX = 15; // dubious
  }
  enum DateTimeKind
  {
     // The time represented is not specified as either local time or Coordinated Universal Time (UTC).
     UNSPECIFIED = 0;
     // The time represented is UTC.
     UTC = 1;
     // The time represented is local time.
     LOCAL = 2;
   }
}

message NetObjectProxy {
  int32 existingObjectKey = 1; // for a tracked object, the key of the **first** time this object was seen
  int32 newObjectKey = 2; // for a tracked object, a **new** key, the first time this object is seen
  int32 existingTypeKey = 3; // for dynamic typing, the key of the **first** time this type was seen
  int32 newTypeKey = 4; // for dynamic typing, a **new** key, the first time this type is seen
  string typeName = 8; // for dynamic typing, the name of the type (only present along with newTypeKey)
  bytes payload = 10; // the new string/value (only present along with newObjectKey)
}

message Guid {
  fixed64 lo = 1; // the first 8 bytes of the guid (note:crazy-endian)
  fixed64 hi = 2; // the second 8 bytes of the guid (note:crazy-endian)
}

message Decimal {
  uint64 lo = 1; // the first 64 bits of the underlying value
  uint32 hi = 2; // the last 32 bis of the underlying value
  uint32 signScale = 3; // the number of decimal digits (bits 1-16), and the sign (bit 0)
}

• • 执行. proto**

syntax = "proto3";

package execution;

option go_package = "./protos";

import "bcl.proto";

enum OrderStatus {
  Working = 0;
  Rejected = 1;
  Cancelled = 2;
  Completed = 3;
}

enum OrderType {
  Limit = 0;
  Market = 1;
  StopLimit = 2;
  StopMarket = 3;
}

enum OrderSide {
  Buy = 0;
  Sell = 1;
}

enum RejectReason {
  NoRejection = 0;
  InstrumentNotFound = 1;
  OrderNotFound = 2;
  InvalidOrderType = 3;
  InvalidAccount = 4;
  InvalidSide = 5;
  InvalidAmount = 6;
  InvalidLimitPrice = 7;
  InvalidQuoteLimit = 8;
  InvalidActivationPrice = 9;
  InvalidTimeInForce = 10;
  MarketHalted = 11;
  MarketPaused = 12;
  NoCounterOrders = 13;
  MissingExpirationTime = 14;
  IncorrectExpirationTime = 15;
  InternalError = 16;
  IllegalStatusSwitch = 17;
  OrderAlreadyExists = 18;
  InstrumentNotReady = 19;
  ExternalSystemError = 20;
}

enum ReportCause {
  NONE = 0;
  NewOrder = 1;
  CancelOrder = 2;
  MassCancel = 3;
  Expiration = 4;
  Trigger = 5;
  MarketStatusChange = 6;
}

enum TimeInForce {
  GoodTillCancel = 0;
  ImmediateOrCancel = 1;
  FillOrKill = 2;
}

enum CancelReason {
  NotCancelled = 0;
  CancelledByTrader = 1;
  CancelledBySystem = 2;
  SelfMatchPrevention = 3;
  OrderTimeInForce = 4;
  Liquidation = 100;
}

message TradeData {
  int64 TradeId = 1;
  bcl.Decimal Amount = 4;
  bcl.Decimal ExecutionPrice = 5;
  OrderStatus OrderStatus = 7;
  int64 AccountId = 11;
  bcl.Guid MatchedOrderExternalId = 14;
  int64 MatchedOrderId = 16;
  bcl.Decimal RemainingAmount = 17;
}

message Execution {
  bytes Origin = 4;
  OrderSide Side = 7;
  bcl.Decimal RequestedPrice = 8;
  bcl.Decimal RequestedAmount = 9;
  bcl.Decimal RemainingAmount = 10;
  int64 ExecutedAt = 13;
  OrderStatus OrderStatus = 14;
  repeated TradeData Trades = 16;
  OrderType OrderType = 20;
  int64 Version = 22;
  int64 AccountId = 23;
  RejectReason RejectReason = 25;
  ReportCause ReportCause = 26;
  bcl.Guid InstructionId = 27;
  bcl.Guid ExternalOrderId = 28;
  int32 ExecutionEngineMarketId = 29;
  int64 OrderId = 30;
  CancelReason CancelReason = 31;
  int64 TxId = 32;
  TimeInForce TimeInForce = 34;
  string CancelledBy = 35;
}

• • protos/**

此文件夹中的文件是使用以下命令从proto文件生成的：

protoc --go_out=protos --go_opt=paths=source_relative bcl.proto execution.proto

• • go. mod**

module mymodule.local

go 1.20

require google.golang.org/protobuf v1.30.0

• • main. go**

package main

import (
    "encoding/binary"
    "log"

    "google.golang.org/protobuf/proto"

    "mymodule.local/protos"
)

func main() {
    data := []byte{5, 85, 0, 0, 0, 56, 1, 66, 3, 8, 144, 78, 74, 2, 8, 1, 82, 2, 8, 1, 104, 197, 192, 132, 194, 159, 143, 219, 237, 8, 176, 1, 25, 184, 1, 11, 208, 1, 1, 218, 1, 18, 9, 133, 66, 138, 247, 239, 67, 93, 77, 17, 176, 192, 189, 75, 170, 203, 186, 145, 226, 1, 18, 9, 133, 66, 138, 247, 239, 67, 93, 77, 17, 176, 192, 189, 75, 170, 203, 186, 145, 232, 1, 1, 240, 1, 25, 128, 2, 25}
    if len(data) < 5 {
        log.Fatal("data should contain at least 5 bytes")
    }
    messageType := data[0]
    length := binary.LittleEndian.Uint32(data[1:5])
    data = data[5:]
    if length != uint32(len(data)) {
        log.Fatalf("invalid data length: %d", length)
    }
    execution := &protos.Execution{}

    err := proto.Unmarshal(data, execution)
    if err != nil {
        log.Fatalf("Err unmarshalling!: %v", err)
    }

    log.Printf("message type: %d, message: %+v", messageType, execution)
}

问题中提供的数据的输出：

2023/06/15 17:50:58 message type: 5, message: Side:Sell  RequestedPrice:{lo:10000}  RequestedAmount:{lo:1}  RemainingAmount:{lo:1}  ExecutedAt:638223043314917445  Version:25  AccountId:11  ReportCause:NewOrder  InstructionId:{lo:5574686611683820165  hi:10500929413443338416}  ExternalOrderId:{lo:5574686611683820165  hi:10500929413443338416}  ExecutionEngineMarketId:1  OrderId:25  TxId:25