Message format

This is the hemera message format described in typescript. You can use it to implement new hemera clients in other languages but you don't have to implement the NATS driver because there are already many clients for different languages available.

interface Message {
  pattern: Pattern
  trace: Trace
  request: Request
  result: Any
  error: HError | null
  meta: Object
  delegate?: Object
}

interface Pattern {
  topic: Trace
}

interface Trace {
  traceId: string
  spanId: string
  timestamp: number
  service: string
  method: string
  parentSpanId?: string
  duration?: number
}

interface Request {
  id: string
  type: RequestType
  service: string
  method: string
}

interface HError extends Error {
  code?: string
  [key: string]: Any
}

enum RequestType {
  request = 'request',
  pubsub = 'pubsub'
}