hpcore/examples/js_client/text-client.js

const readline = require('readline');
const HotPocket = require('./hp-client-lib');

async function main() {

    const keys = await HotPocket.generateKeys();

    const pkhex = Buffer.from(keys.publicKey).toString('hex');
    console.log('My public key is: ' + pkhex);

    let server = 'wss://localhost:8080'
    if (process.argv.length == 3) server = 'wss://localhost:' + process.argv[2]
    if (process.argv.length == 4) server = 'wss://' + process.argv[2] + ':' + process.argv[3]

    // Simple connection to single server without any validations.
    const hpc = await HotPocket.createClient([server], keys);

    // Maintain multiple connections with contract id/version and trusted server key validation.
    // const hpc = await HotPocket.createClient(
    //     [
    //         "wss://localhost:8081",
    //         "wss://localhost:8082",
    //         "wss://localhost:8083"
    //     ],
    //     keys,
    //     {
    //         contractId: "3c349abe-4d70-4f50-9fa6-018f1f2530ab",
    //         contractVersion: "1.0",
    //         trustedServerKeys: [
    //             "ed5597c207bbd251997b7133d5d83a2c6ab9600810edf0bdb43f4004852b8c9e17",
    //             "ed0b2ffd75b67c3979d3c362d8350ec190f053fa27d3dfcb2eced426efd1d3affc",
    //             "edd2e1a817387d68adf8adb1d0b339e3f04868c3c81bf6a7472647f10657e31aa1"
    //         ],
    //         protocol: HotPocket.protocols.json,
    //         requiredConnectionCount: 2,
    //         connectionTimeoutMs: 5000
    //     });

    // We'll register for HotPocket events before connecting.

    // This will get fired if HP server disconnects unexpectedly.
    hpc.on(HotPocket.events.disconnect, () => {
        console.log('Disconnected');
        rl.close();
    })

    // This will get fired as servers connects/disconnects.
    hpc.on(HotPocket.events.connectionChange, (server, action) => {
        console.log(server + " " + action);
    })

    // This will get when the unl public key list changes.
    hpc.on(HotPocket.events.unlChange, (unl) => {
        console.log("New unl received: " + JSON.stringify(unl)); // unl is an array of hex public keys.
    })

    // This will get fired when contract sends an output.
    hpc.on(HotPocket.events.contractOutput, (output) => {
        console.log("Contract output>> " + output);
    })

    // This will get fired when contract sends a read response.
    hpc.on(HotPocket.events.contractReadResponse, (response) => {
        console.log("Contract read response>> " + response);
    })

    // Establish HotPocket connection.
    if (!await hpc.connect()) {
        console.log('Connection failed.');
        return;
    }
    console.log('HotPocket Connected.');

    // start listening for stdin
    const rl = readline.createInterface({
        input: process.stdin,
        output: process.stdout
    });

    // On ctrl + c we should close HP connection gracefully.
    rl.on('SIGINT', () => {
        console.log('SIGINT received...');
        rl.close();
        hpc.close();
    });

    console.log("Ready to accept inputs.");

    const input_pump = () => {
        rl.question('', (inp) => {

            if (inp.length > 0) {
                if (inp.startsWith("read "))
                    hpc.sendContractReadRequest(inp.substr(5));
                else {
                    hpc.sendContractInput(inp);
                }
            }

            input_pump();
        })
    }
    input_pump();
}

main();