chainpoint-connector

Chainpoint Connector

Chainpoint Connector is an easy way to manage retrieval of proofs from the Chainpoint Network. Because proof submission and retrieval from the blockchain are highly asynchronous processes, Connector is designed to queue up and execute callbacks when proofs become available.

Installation

npm install chainpoint-connector --save-prod

or, if you want the latest fixes,

npm install https://github.com/chainpoint/chainpoint-connector --save-prod

This library is an ECMAscript module and must be used with import-from syntax.

Usage

Connector uses redis as a persistent datastore. After connecting with redis and setting up the task scheduler, you can define a custom callback method to accept and store the proof results when they arrive. The callback is passed the following parameters:

• any upstream error
• time (ms)
• an optional id that can be added to allow your system to identify a proof when retrieved
• the type of proof (cal or btc, standing for calendar or bitcoin anchor)
• the proof returned by the Chainpoint Network

Example:

import ChainpointConnector from 'chainpoint-connector'


async function submitAndMonitor() {
    const chpconn = new ChainpointConnector("redis", 6379)
    await chpconn.connect()
    chpconn.setCallback(async function (error, time, id, type, proofs) {
        if (!error && type == "btc") {
            console.log(proofs)
            //update your database with results
        }
    })
    let hashes = [
        '1d2a9e92b561440e8d27a21eed114f7018105db00262af7d7087f7dea9986b0a',
        '2d2a9e92b561440e8d27a21eed114f7018105db00262af7d7087f7dea9986b0a',
        '3d2a9e92b561440e8d27a21eed114f7018105db00262af7d7087f7dea9986b0a'
    ]
    await chpconn.submitHashes('custom ID', hashes)
}

submitAndMonitor()