wirejs

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

Installation

NPM

The official distribution package can be found at npm.

Add dependency to your project

npm run @wireio/wirejs-native

or

yarn add @wireio/wirejs-native

Using with Typescript

In order to get access to the TextEncoding and TextDecoding types, you need to add @types/text-encoding as a dev dependency: yarn add --dev @types/text-encoding

If you're using Node (not a browser) then you'll also need to make sure the dom lib is referenced in your tsconfig.json:

{
 "compilerOptions": {
  "lib": [..., "dom"]
 }
}

Browser Distribution

Clone this repository locally then run yarn build-web. The browser distribution will be located in dist-web and can be directly copied into your project repository. The dist-web folder contains minified bundles ready for production, along with source mapped versions of the library for debugging. For full browser usage examples, see the documentation.

Import

ES Modules

Importing using ESM syntax is supported using TypeScript, webpack, or Node.js with --experimental-modules flag

import { Api, JsonRpc, RpcError } from '@wireio/wirejs-native';
import { JsSignatureProvider } from '@wireio/wirejs-native/dist/@wireio/wirejs-native-jssig';           // development only

CommonJS

Importing using commonJS syntax is supported by Node.js out of the box.

const { Api, JsonRpc, RpcError } = require('@wireio/wirejs-native');
const { JsSignatureProvider } = require('@wireio/wirejs-native/dist/@wireio/wirejs-native-jssig');      // development only
const fetch = require('node-fetch');                                    // node only; not needed in browsers
const { TextEncoder, TextDecoder } = require('util');                   // node only; native TextEncoder/Decoder

Basic Usage

Signature Provider

The Signature Provider holds private keys and is responsible for signing transactions.

Using the JsSignatureProvider in the browser is not secure and should only be used for development purposes. Use a secure vault outside of the context of the webpage to ensure security when signing transactions in production

const defaultPrivateKey = "5JtUScZK2XEp3g9gh7F8bwtPTRAkASmNrrftmx4AxDKD5K4zDnr"; // bob
const signatureProvider = new JsSignatureProvider([defaultPrivateKey]);

JSON-RPC

Open a connection to JSON-RPC, include fetch when on Node.js.

const rpc = new JsonRpc('http://127.0.0.1:8888', { fetch });

API

Include textDecoder and textEncoder when using in Node. You may exclude these when running in a browser since most modern browsers now natively support these. If your browser does not support these (https://caniuse.com/#feat=textencoder), then you can import them as a dependency through the following deprecated npm package: https://www.npmjs.com/package/text-encoding

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

Sending a transaction

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 expireSeconds and either blocksBehind or useLastIrreversible. 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.

(async () => {
  const result = await api.transact({
    actions: [{
      account: 'sysio.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 RpcError for handling RPC Errors

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

License

MIT