Quick Start

This guide will have you connected to the DEMOS Network and querying the blockchain in just a few minutes.

Install the SDK

Add the DEMOS SDK to your project using bun (recommended):

bun add @kynesyslabs/demosdk@latest

For browser environments, you’ll need Buffer polyfills. See Getting Started for Vite configuration.

Create a Wallet

Generate a new wallet with a mnemonic seed phrase:

import { Demos } from "@kynesyslabs/demosdk/websdk"

const demos = new Demos()

// Generate a new mnemonic (save this securely!)
const mnemonic = demos.newMnemonic()
console.log("Your mnemonic:", mnemonic)

// Connect using the mnemonic
const publicKey = await demos.connectWallet(mnemonic, {
    algorithm: "ed25519",
})
console.log("Your public key:", publicKey)

Security: Never share your mnemonic. Store it securely - it controls access to all your keys.

Connect to the Network

Connect to a DEMOS RPC node:

await demos.connect("https://node2.demos.sh")

if (demos.connected) {
    console.log("Connected to DEMOS Network!")
}

Query the Blockchain

Now you can read data from the blockchain:

// Get the latest block number
const blockNumber = await demos.getLastBlockNumber()
console.log("Latest block:", blockNumber)

// Get the latest block hash
const blockHash = await demos.getLastBlockHash()
console.log("Latest block hash:", blockHash)

// Get your wallet info
const address = demos.getAddress()
const addressInfo = await demos.getAddressInfo(address)
console.log("Your wallet info:", addressInfo)

Sign a Message

Test your wallet by signing and verifying a message:

const message = "Hello DEMOS Network!"

// Sign the message
const signature = await demos.signMessage(message)
console.log("Signature:", signature)

// Verify the signature
const publicKey = demos.getAddress()
const isValid = await demos.verifyMessage(
    message,
    signature.data,
    publicKey,
    { algorithm: signature.type }
)
console.log("Signature valid:", isValid)

Complete Example

Here’s the full code to copy and run:

import { Demos } from "@kynesyslabs/demosdk/websdk"

async function main() {
    // Initialize
    const demos = new Demos()

    // Create wallet
    const mnemonic = demos.newMnemonic()
    console.log("Mnemonic:", mnemonic)

    const publicKey = await demos.connectWallet(mnemonic, {
        algorithm: "ed25519",
    })
    console.log("Public key:", publicKey)

    // Connect to network
    await demos.connect("https://node2.demos.sh")
    console.log("Connected:", demos.connected)

    // Query blockchain
    const blockNumber = await demos.getLastBlockNumber()
    console.log("Latest block:", blockNumber)

    // Sign message
    const signature = await demos.signMessage("Hello DEMOS!")
    console.log("Signed message successfully!")

    // Clean up
    demos.disconnect()
}

main().catch(console.error)

Next Steps

Create Transactions

Learn how to create and broadcast transactions

Cross-Chain Operations

Execute transactions on other blockchains via DEMOS

Node Calls Reference

Explore all available blockchain queries

Authentication Deep Dive

Learn about PQC algorithms and advanced key management

Introduction

FAQ

Node Setup

Quick Start

Quick Start

Complete Example

Next Steps

Create Transactions

Cross-Chain Operations

Node Calls Reference

Authentication Deep Dive

​Quick Start

​Complete Example

​Next Steps

Create Transactions

Cross-Chain Operations

Node Calls Reference

Authentication Deep Dive

Quick Start

Complete Example

Next Steps