Generated TS types for google.protobuf.Timestamp do not match grpc-gateway encoding

[KenxinKun]

Context

I am using some messages in my protos tha use the well-known google.protobuf.Timestamp:

message Timestamp {
  // Represents seconds of UTC time since Unix epoch
  // 1970-01-01T00:00:00Z. Must be from 0001-01-01T00:00:00Z to
  // 9999-12-31T23:59:59Z inclusive.
  int64 seconds = 1;

  // Non-negative fractions of a second at nanosecond resolution. Negative
  // second values with fractions must still have non-negative nanos values
  // that count forward in time. Must be from 0 to 999,999,999
  // inclusive.
  int32 nanos = 2;
}

Issue

When using grpc-gateway + grpc-gateway-ts to generate both the Go server and the TS client respectively, the following type is generated:

export type Timestamp = {
  seconds?: string
  nanos?: number
}

However, the Go server encodes the timestamp as a string! (checked the received body in the network tab)

For now, I am manually replacing the generated timestamp.pb.ts for the following:

export type Timestamp = string

I am not entirely sure if the best solution is to fix the client side or the server side in this case...