ledger

Universal Ledger Agent - Aries Cloudagent Ledger Plugin

This package handles everything that has to do with the ledger in Hyperledger Aries. It allows to perform operations to the ledger connected to the Aries Cloudagent.

Usage

LedgerController

import { EventHandler } from 'universal-ledger-agent'
import { LedgerController } from '@ula-aca/ledger'

const ledgerController = new LedgerController({
  basePath: 'https://aca-py-api.com'
})

const eventHandler = new EventHandler([ledgerController])

@ula-aca/ledger/register-nym

Send a NYM registration to the ledger.

import { EventHandler, UlaResponse } from 'universal-ledger-agent'
import {
  LedgerController,
  RegisterNymMessage,
  RegisterNymResult,
  LedgerMessageTypes
} from '@ula-aca/ledger'

const ledgerController = new LedgerController({
  basePath: 'https://aca-py-api.com'
})

const eventHandler = new EventHandler([ledgerController])

const message: RegisterNymMessage = {
  type: LedgerMessageTypes.REGISER_NYM,
  body: {
    did: 'xZRz2JK8HngynkLe6m33J',
    verkey: 'XHLPXpGT9y5PaLo8n7pt379dXx6SLZYHqQN393yfA2e'
  }
}

eventHandler.processMsg(message, (response: UlaResponse) => {
  if (response.statusCode < 200 || response.statusCode >= 300) {
    // error
  } else {
    // response.body is response from /ledger/register-nym POST api endpoint in aca-py
    // https://ula-aca.github.io/aries-cloudagent-interface-javascript/#/ledger/post_ledger_register_nym
    const result: RegisterNymResult = response.body
  }
})

@ula-aca/ledger/get-verkey-by-did

Get the verkey for a DID from the ledger.

import { EventHandler, UlaResponse } from 'universal-ledger-agent'
import {
  LedgerController,
  GetVerkeyByDidMessage,
  GetVerkeyByDidResult,
  LedgerMessageTypes
} from '@ula-aca/ledger'

const ledgerController = new LedgerController({
  basePath: 'https://aca-py-api.com'
})

const eventHandler = new EventHandler([ledgerController])

const message: RegisterNymMessage = {
  type: LedgerMessageTypes.GET_VERKEY_BY_DID,
  body: {
    did: 'xZRz2JK8HngynkLe6m33J'
  }
}

eventHandler.processMsg(message, (response: UlaResponse) => {
  if (response.statusCode < 200 || response.statusCode >= 300) {
    // error
  } else {
    // response.body is response from /ledger/did-verkey api endpoint in aca-py
    // https://ula-aca.github.io/aries-cloudagent-interface-javascript/#/ledger/get_ledger_did_verkey
    const result: GetVerkeyByDidResult = response.body
  }
})

@ula-aca/ledger/get-endpoint-by-did

Get the endpoint for a DID from the ledger.

import { EventHandler, UlaResponse } from 'universal-ledger-agent'
import {
  LedgerController,
  GetEndpointByDidMessage,
  GetEndpointByDidResult,
  LedgerMessageTypes
} from '@ula-aca/ledger'

const ledgerController = new LedgerController({
  basePath: 'https://aca-py-api.com'
})

const eventHandler = new EventHandler([ledgerController])

const message: GetEndpointByDidMessage = {
  type: LedgerMessageTypes.GET_ENDPOINT_BY_DID,
  body: {
    did: 'xZRz2JK8HngynkLe6m33J'
  }
}

eventHandler.processMsg(message, (response: UlaResponse) => {
  if (response.statusCode < 200 || response.statusCode >= 300) {
    // error
  } else {
    // response.body is response from /ledger/did-endpoint api endpoint in aca-py
    // https://ula-aca.github.io/aries-cloudagent-interface-javascript/#/ledger/get_ledger_did_endpoint
    const result: GetEndpointByDidResult = response.body
  }
})

@ula-aca/ledger/get-transaction-author-agreement

Fetch the current transaction author agreement, if any

import { EventHandler, UlaResponse } from 'universal-ledger-agent'
import {
  LedgerController,
  GetTransactionAuthorAgreementMessage,
  GetTransactionAuthorAgreementResult,
  LedgerMessageTypes
} from '@ula-aca/ledger'

const ledgerController = new LedgerController({
  basePath: 'https://aca-py-api.com'
})

const eventHandler = new EventHandler([ledgerController])

const message: GetTransactionAuthorAgreementMessage = {
  type: LedgerMessageTypes.GET_TRANSACTION_AUTHOR_AGREEMENT
}

eventHandler.processMsg(message, (response: UlaResponse) => {
  if (response.statusCode < 200 || response.statusCode >= 300) {
    // error
  } else {
    // response.body is response from /ledger/taa api endpoint in aca-py
    // https://ula-aca.github.io/aries-cloudagent-interface-javascript/#/ledger/get_ledger_taa
    const result: GetTransactionAuthorAgreementResult = response.body
  }
})

@ula-aca/ledger/accept-transaction-author-agreement

Accept the transaction author agreement

import { EventHandler, UlaResponse } from 'universal-ledger-agent'
import {
  LedgerController,
  AcceptTransactionAuthorAgreementMessage,
  AcceptTransactionAuthorAgreementResult,
  LedgerMessageTypes
} from '@ula-aca/ledger'

const ledgerController = new LedgerController({
  basePath: 'https://aca-py-api.com'
})

const eventHandler = new EventHandler([ledgerController])

// TODO: Add correct example for accepting TAA.
// Ledger needs to have a TAA, you can publish this with
// the ledger api from the indy sdk
const message: AcceptTransactionAuthorAgreementMessage = {
  type: LedgerMessageTypes.ACCEPT_TRANSACTION_AUTHOR_AGREEMENT,
  body: {
    mechanism: '',
    text: '',
    version: ''
  }
}

eventHandler.processMsg(message, (response: UlaResponse) => {
  if (response.statusCode < 200 || response.statusCode >= 300) {
    // error
  } else {
    // response.body is response from /ledger/taa/accept POST api endpoint in aca-py
    // https://ula-aca.github.io/aries-cloudagent-interface-javascript/#/ledger/post_ledger_taa_accept
    const result: AcceptTransactionAuthorAgreementResult = response.body
  }
})

Examples

For example usage see the examples/ directory.