Monitor Module

The Monitor Module is useful to poll for changes, e.g. on the blockchain, especially for confirmations of transactions.

This module is still in an experimental stage

Installation

npm

npm i @signumjs/monitor

yarn

yarn add @signumjs/monitor

<script/>

<script src='https://cdn.jsdelivr.net/npm/@signumjs/monitor/dist/signumjs.monitor.min.js'></script>

The namespace is sig$monitor

// Create an account monitor
const monitor = new sig$monitor.Monitor({
   asyncFetcherFn: tryFetchAccount,
   compareFn: checkIfAccountExists,
   intervalSecs: 10, // polling interval in seconds
   key: 'monitor-account',
   timeoutSecs: 2 * 240 // when reached timeout the monitor stops
})
.onFulfilled(() => {
   // called when `checkIfAccountExists` returns true
   console.log('Yay, account active');
})
.onTimeout(() => {
   // called when `timeoutSecs` is reached
   console.log('Hmm, something went wrong');
}).start();

API Reference

https://signum-network.github.io/signumjs/modules/monitor.htmlsignum-network.github.io