9.1.2. Javascript library

This library provides functions which will help you to interact with Hyperledger Iroha from your JS program.

9.1.2.1. Installation

Via npm

$ npm i iroha-helpers

Via yarn

$ yarn add iroha-helpers

9.1.2.2. Commands

For usage of any command you need to provide commandOptions as a first argument.

const commandOptions = {
  privateKeys: ['f101537e319568c765b2cc89698325604991dca57b9716b58016b253506cab70'], // Array of private keys in hex format
  creatorAccountId: '', // Account id, ex. admin@test
  quorum: 1,
  commandService: null
}

As second argument you need to provide object that contains properties for required command.

// Example usage of setAccountDetail

const commandService = new CommandService_v1Client(
  '127.0.0.1:50051',
  grpc.credentials.createInsecure()
)

const adminPriv = 'f101537e319568c765b2cc89698325604991dca57b9716b58016b253506cab70'

commands.setAccountDetail({
  privateKeys: [adminPriv],
  creatorAccountId: 'admin@test',
  quorum: 1,
  commandService
}, {
  accountId: 'admin@test',
  key: 'jason',
  value: 'statham'
})

9.1.2.3. Queries

For usage of any query you need to provide queryOptions as a first argument.

const queryOptions = {
  privateKey: 'f101537e319568c765b2cc89698325604991dca57b9716b58016b253506cab70', // Private key in hex format
  creatorAccountId: '', // Account id, ex. admin@test
  queryService: null
}

As second argument you need to provide object that contains properties for required query.

// Example usage of getAccountDetail

const queryService = new QueryService_v1Client(
  '127.0.0.1:50051',
  grpc.credentials.createInsecure()
)

const adminPriv = 'f101537e319568c765b2cc89698325604991dca57b9716b58016b253506cab70'

queries.getAccountDetail({
  privateKey: adminPriv,
  creatorAccountId: 'admin@test',
  queryService
}, {
  accountId: 'admin@test'
})

9.1.2.4. Example code

import grpc from 'grpc'
import {
  QueryService_v1Client,
  CommandService_v1Client
} from '../iroha-helpers/lib/proto/endpoint_grpc_pb'
import { commands, queries } from 'iroha-helpers'

const IROHA_ADDRESS = 'localhost:50051'
const adminPriv =
  'f101537e319568c765b2cc89698325604991dca57b9716b58016b253506cab70'

const commandService = new CommandService_v1Client(
  IROHA_ADDRESS,
  grpc.credentials.createInsecure()
)

const queryService = new QueryService_v1Client(
  IROHA_ADDRESS,
  grpc.credentials.createInsecure()
)

Promise.all([
  commands.setAccountDetail({
    privateKeys: [adminPriv],
    creatorAccountId: 'admin@test',
    quorum: 1,
    commandService
  }, {
    accountId: 'admin@test',
    key: 'jason',
    value: 'statham'
  }),
  queries.getAccountDetail({
    privateKey: adminPriv,
    creatorAccountId: 'admin@test',
    queryService
  }, {
    accountId: 'admin@test'
  })
])
  .then(a => console.log(a))
  .catch(e => console.error(e))