Composition

import { create, combine } from "@submodule/core"
 
const config = create(async () => {
  // load config from YAML
  // validate configuration ...
  return { mongoDB: { ...mongoConfig }, fastify: {...fastifyConfig } }
})
 
const mongoService = create(async (config) => {
  return mongo.connect(config.mongoDb)
}, config)
 
const userService = create(async (mongoDb) => {
  return {
    createUser: ...,
    listUsers: ...
    removeUser: ...
  }
}, mongoService)
 
const projectService = create(async (mongoDb) => {
  return {
    createProject: ...,
    listProjects: ...
    removeProject: ...
  }
}, mongoService)
 
const services = combine({ userService, projectService }) 
 
const result = await from(services).execute(({ userService, projectService }) => {
  // do whatever you like with services any where
})