Javascript API for integration with ARISEN-based blockchains using ARISEN RPC API.

Documentation can be found here

Installation

NodeJS

npm install arisenjs@beta

Basic Usage

NodeJS

const arisenjs = require('arisenjs');
const fetch = require('node-fetch');                            // node only; not needed in browsers
const { TextDecoder, TextEncoder } = require('text-encoding');  // node, IE11 and IE Edge Browsers

SignatureProvider

SignatureProvider holds private keys and is responsible for signing transactions

const defaultPrivateKey = "5JtUScZK2XEp3g9gh7F8bwtPTRAkASmNrrftmx4AxDKD5K4zDnr"; // useraaaaaaaa
const signatureProvider = new arisenjs.SignatureProvider([defaultPrivateKey]);

JSON-RPC

Open a connection to JSON-RPC, include fetch when on NodeJS

const rpc = new arisenjs.Rpc.JsonRpc('http://127.0.0.1:8000', { fetch });

API Constructor

Include textDecoder and textEncoder when using in browser.

const api = new arisenjs.Api({ rpc, signatureProvider, textDecoder: new TextDecoder, textEncoder: new TextEncoder });

Sending a transaction

(async () => {
  const result = await api.transact({
    actions: [{
      account: 'arisen.token',
      name: 'transfer',
      authorization: [{
        actor: 'useraaaaaaaa',
        permission: 'active',
      }],
      data: {
        from: 'useraaaaaaaa',
        to: 'useraaaaaaab',
        quantity: '0.0001 SYS',
        memo: '',
      },
    }]
  }, {
    blocksBehind: 3,
    expireSeconds: 30,
  });
  console.dir(result);
})();

Error handling

use arisenjs_jsonrpc.RpcError for handling JSON-RPC Errors

...
try {
  const result = await api.transact({
  ...
} catch (e) {
  console.log('\nCaught exception: ' + e);
  if (e instanceof arisenjs_jsonrpc.RpcError)
    console.log(JSON.stringify(e.json, null, 2);
}
...

Browsers

After running npm run build-web or yarn build-web, the browser distribution will be located in dist. For full browser usage examples, see the documentation.

How it works

transact() is used to sign and push transactions onto the blockchain with an optional configuration object parameter. This parameter can override the default value of broadcast: true, and can be used to fill TAPOS fields given blocksBehind and expireSeconds. Given no configuration options, transactions are expected to be unpacked with TAPOS fields (expiration, ref_block_num, ref_block_prefix) and will automatically be broadcast onto the chain.

Running Tests

Automated Test Suite

npm run test or yarn test

Integration Tests

1. npm run build-web or yarn build-web
2. Open test.html in your browser of choice

The integration tests assume that you have a local node for ARISEN set up at localhost:8000. The test.html file should run through 5 test cases with the final showing an exception on the screen for missing required TAPOS.