Demos SDK

A JavaScript/TypeScript SDK providing a unified interface for interacting with the Demos network and cross-chain operations.

IMPORTANT This SDK is built with bun and performs the best with bun

Requirements

• Node.js 18.0 or higher
• TypeScript 5.0 or higher (for TypeScript projects)

Installation

bun install @kynesyslabs/demosdk
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or

npm install @kynesyslabs/demosdk
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or

yarn add @kynesyslabs/demosdk
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Features

Core Modules

• WebSDK: Browser-compatible SDK for web applications
• Cross-chain Core: Unified interface for multiple blockchain networks
• DemosWork: Workflow execution engine
• Wallet: Wallet management and cryptographic operations
• Bridge: Cross-chain asset bridging via Rubic protocol
• Abstraction: Chain-agnostic transaction and balance queries
• Encryption: Post-quantum cryptography and zero-knowledge proofs

Supported Blockchains

• EVM-compatible: Ethereum, BSC, Polygon, Arbitrum, Optimism
• Non-EVM: Solana, Bitcoin, TON, Near, MultiversX, Cosmos IBC, XRP

Usage

Basic Import

import { Demos } from "@kynesyslabs/demosdk/websdk"
import { prepareXMPayload } from "@kynesyslabs/demosdk/xm-websdk"
import { DemosWork } from "@kynesyslabs/demosdk/demoswork"
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Module Exports

The SDK provides multiple entry points:

• @kynesyslabs/demosdk - Main entry point
• @kynesyslabs/demosdk/websdk - Web SDK components
• @kynesyslabs/demosdk/xm-websdk - Cross-chain web SDK
• @kynesyslabs/demosdk/xm-localsdk - Cross-chain local SDK
• @kynesyslabs/demosdk/xmcore - Cross-chain core functionality
• @kynesyslabs/demosdk/demoswork - Workflow engine
• @kynesyslabs/demosdk/wallet - Wallet utilities
• @kynesyslabs/demosdk/abstraction - Chain abstraction layer
• @kynesyslabs/demosdk/bridge - Bridging functionality
• @kynesyslabs/demosdk/encryption - Cryptographic utilities
• @kynesyslabs/demosdk/utils - Common utilities
• @kynesyslabs/demosdk/types - TypeScript type definitions
• @kynesyslabs/demosdk/l2ps - Layer 2 payment solutions

Quick Start

Initialize and Connect Wallet

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

// 1. Initialize Demos SDK (no parameters)
const demos = new Demos()

// 2. Connect to the network
const rpc = "https://demosnode.discus.sh"
await demos.connect(rpc)

// 3. Generate a new mnemonic or use existing one
const mnemonic = demos.newMnemonic() // Generates 12-word mnemonic
// const mnemonic = "your existing mnemonic phrase..." // Or use existing

// 4. Connect your wallet
await demos.connectWallet(mnemonic)

// 5. Get your wallet address
const address = demos.getAddress()
console.log("Wallet address:", address)
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Native Transaction Example

// Send native DEM tokens
const tx = await demos.transfer(
  "0x6690580a02d2da2fefa86e414e92a1146ad5357fd71d594cc561776576857ac5",
  100 // amount in DEM
)

// Confirm and broadcast transaction
const validityData = await demos.confirm(tx)
const result = await demos.broadcast(validityData)
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Cross-chain Transaction Example

import { 
  prepareXMPayload, 
  prepareXMScript 
} from "@kynesyslabs/demosdk/websdk"
import { EVM } from "@kynesyslabs/demosdk/xm-websdk"

// 1. Create cross-chain payload (e.g., Ethereum Sepolia)
const evm = await EVM.create("https://rpc.ankr.com/eth_sepolia")
await evm.connectWallet("your_ethereum_private_key")

const evmTx = await evm.preparePay(
  "0xRecipientAddress",
  "0.001" // 0.001 ETH
)

// 2. Create XMScript
const xmscript = prepareXMScript({
  chain: "eth",
  subchain: "sepolia", 
  signedPayloads: [evmTx],
  type: "pay"
})

// 3. Convert to Demos transaction
const tx = await prepareXMPayload(xmscript, demos)

// 4. Confirm and broadcast
const validityData = await demos.confirm(tx)
const result = await demos.broadcast(validityData)
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Development

Building from Source

# Install dependencies first
bun install  # or npm install, or yarn install

# Then build
bun run build  # or npm run build, or yarn build
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Local Development

To use the SDK from a local source:

# Build the SDK
bun run build  # or yarn build, or npm run build

# In your project
bun add file:../path/to/sdks  # or yarn/npm add file:../path/to/sdks
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Testing

Run specific test suites (works with both bun and yarn):

bun test:multichain    # Cross-chain SDK payload generation
bun test:tx           # Cross-chain transaction tests
bun test:demoswork    # DemosWork operations
bun test:native       # Native payment transactions
bun test:identities   # Identity management
bun test:web2         # Web2 proxy functionality
bun test:bridge       # Bridge service tests
bun test:btc          # Bitcoin-specific tests
bun test:evm          # EVM chain tests
bun test:pqc          # Post-quantum cryptography

# Or with yarn/npm:
yarn test:multichain
npm run test:multichain
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Automatic Build Validation

The repository includes a pre-commit hook that automatically validates the build before allowing commits. This hook is installed automatically when you run bun install (or npm/yarn install).

Features

• Automatically runs build command before each commit
• Works with bun, npm, or yarn (auto-detects available package manager)
• Prevents commits if the build fails
• Installs automatically on bun/npm/yarn install

Bypassing the Check

For debugging or temporary commits, you can skip the build check:

1. Start your commit message with 'DEBUG' or 'TEMP'
2. Use git commit --no-verify
3. Use GIT_SKIP_BUILD=true git commit

Publishing

The SDK is automatically published to NPM when:

1. The version in package.json is incremented
2. Changes are committed with a message starting with "release"
3. The commit is pushed to GitHub

Example:

git commit -m "release v2.3.25"
git push
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For simplicity, a publish.sh script is included. By default it will ask to forward the version, but you can re-publish the same version number with ./publish.sh -r.

Documentation

• API Reference: https://kynesyslabs.github.io/demosdk-api-ref/
• Developer Guides: https://docs.kynesys.xyz/

Contributing

We welcome contributions to the Demos SDK. Please ensure:

1. All tests pass before submitting a PR
2. Code follows the existing style and conventions
3. New features include appropriate test coverage
4. Documentation is updated for API changes

Support

• Issues: GitHub Issues
• Discussions: GitHub Discussions
• Security: For security issues, please email security@kynesys.xyz

License

MIT