chia-service-connector

coauthored with @MichaelTaylor3d

Introduction

Package for managing connections to Chia RPC services. Intended to encapsulate finding CHIA_ROOT, implement environment chia conventions, and provide a simple interface for describing the connection with the service. This simplifies finding the cert files, in a reusable manner, decoupled from aby specific communication library or pattern.

Examples

createChiaConnection and createChiaConnectionFromConfig are the main entry points for the package. They return a ChiaConnection object that can be used with a https or wss library to make RPC calls to the service. Unless specified bt the caller, all methods respect the CHIA_ROOT environment variable or default to ~/.chia/mainnet.

The simplest example

This creates a connection to the wallet service using the default connection parameters, localhost and ~/.chia/mainnet/.

const connector = require('chia-service-connector');

const connection = connector.createChiaConnection("wallet");

const configConnection = connector.createChiaConnectionFromConfig("wallet");

A slightly less simple example

Create a connection to the chia daemon on another machine, using the default ~/.chia/mainnet/ location for certs.

const connector = require('chia-service-connector');

const connection = connector.createChiaConnection("daemon", "192.168.1.155");

const configConnection = connector.createChiaConnectionFromConfig("daemon", "~/path/to/some/config.yaml");

All of the arguments for createChiaConnection

const connector = require('chia-service-connector');

const connection = connector.createChiaConnection(
    "full_node",             // service name 
    "192.168.1.155",         // host (name or ip)
    connector.getChiaRoot(), // getChiaRoot will try to find the current CHIA_ROOT
    60,                      // timeout in seconds
    { "full_node": 8765 }    // map of service names to ports - defaults to the standard ports
);

Create the ChiaConnection object directly

The ChiaConnection object can be created directly, but it is recommended to use create methods instead since they accommodate the most environment and conventional values.

const connector = require('chia-service-connector');

const connection = new connector.ChiaConnection(
    "full_node",             // service name 
    "192.168.1.155",         // host (name or ip)
    9812,                    // port
    "~/.chia/mainnet/config/ssl/wallet/private_wallet.key", // full path to the cert file 
    "~/.chia/mainnet/config/ssl/wallet/private_wallet.crt", // full path to the key file
    60,                      // timeout in seconds
);

Members of the ChiaConnection object

• service - the service name
• host - the host name or ip address
• port - the port number
• timeout_seconds - the timeout in seconds for the connection
• cert_path - the full path to the cert file
• key_path - the full path to the key file
• cert - the contents of the cert file as a Buffer
• key - the contents of the key file as a Buffer
• serviceAddress - the formatted address to the service, including protocol, host, and port
• createClientOptions() - a function that returns an object that can be used with the https or wss libraries or https agent

Using the connection

The ChiaConnection keeps the details that can be used with your favorite https library.

const connector = require('chia-service-connector');
const https = require('https');
const axiosLib = require('axios');
const superagent = require('superagent');

const connection = connector.createChiaConnection("wallet");

const axios = axiosLib.create({
        baseURL: connection.serviceAddress,
        timeout: connection.timeout_seconds * 1000,
        headers: {
            accepts: "application/json",
            "content-type": "application/json",
        },
        httpsAgent: new https.Agent(
            connection.createClientOptions()
        ),
    });

const response = await superagent
    .post(`${connection.serviceAddress}/get_sync_status`)
    .send({})
    .timeout(timeout)
    .agent(new https.Agent(connection.createClientOptions()));

Or web-sockets

const connector = require('chia-service-connector');
const ws = require("ws");

const connection = connector.createChiaConnection("daemon");

const socket = new ws.WebSocket(
    connection.serviceAddress,
    connection.createClientOptions()
);

Or the chia-daemon package

import { createChiaConnection, createChiaConnectionFromConfig } from 'chia-service-connector';
import { ChiaDaemon, ChiaHttps } from 'chia-daemon';

const daemonConnection = createChiaConnection("daemon");
const daemon = new ChiaDaemon(daemonConnection);
await demon.connect();
console.log(await daemon.services.full_node.get_blockchain_state())

const walletConnection = createChiaConnectionFromConfig("wallet");
const wallet = new ChiaHttps(walletConnection);
console.log(await wallet.get_wallet_balance({ wallet_id: 1}))

Or whatever other chia library you like.