xx Network RPC API Documentation

Overview

xx Network is the world's first quantum-resistant, privacy-first Layer 1 blockchain, founded by cryptography pioneer David Chaum. Built on the Substrate framework, xx Network features revolutionary metadata shredding technology (cMixx) that obscures transaction patterns and protects against quantum computing attacks.

This documentation provides comprehensive coverage of xx Network's JSON-RPC API methods, enabling developers to interact with xx Network nodes for building applications, wallets, explorers, and other blockchain tools.

Network Information

Mainnet (xx Network)

• Native Token: XX
• Consensus: Nominated Proof-of-Stake (NPoS)
• Block Time: ~6 seconds
• Framework: Substrate
• Special Features: Quantum-resistant, metadata shredding (cMixx)

Connection Endpoints

HTTPS Endpoint

https://api-xxnetwork.n.dwellir.com/{YOUR_API_KEY}

WebSocket Endpoint

wss://api-xxnetwork.n.dwellir.com/{YOUR_API_KEY}

Authentication

Authentication is done via the URL path. Replace {YOUR_API_KEY} with your actual API key obtained from dwellir.com.

API Categories

xx Network's RPC API is organized into the following method categories:

Core APIs

Author Methods

Submit and manage extrinsics (transactions) on the network.

Chain Methods

Query blockchain data including blocks, headers, and finalized state.

State Methods

Access runtime storage, metadata, and proof generation.

System Methods

Node information, health checks, and network properties.

Specialized APIs

BEEFY Methods

Bridge Efficiency Enabling Finality Yielder protocol operations.

Grandpa Methods

GRANDPA finality gadget operations and proofs.

Child State Methods

Manage child storage tries for contracts and parachains.

Sync State Methods

Monitor and manage node synchronization state.

Quick Start Examples

Get Latest Block

const response = await fetch('https://api-xxnetwork.n.dwellir.com/YOUR_API_KEY', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    jsonrpc: '2.0',
    method: 'chain_getBlock',
    params: [],
    id: 1
  })
});

const data = await response.json();
console.log('Latest block:', data.result);

Submit Transaction

import requests
import json

url = "https://api-xxnetwork.n.dwellir.com/YOUR_API_KEY"
headers = {
    "Content-Type": "application/json"
}

# Properly formatted and signed extrinsic
extrinsic = "0x..."

payload = {
    "jsonrpc": "2.0",
    "method": "author_submitExtrinsic",
    "params": [extrinsic],
    "id": 1
}

response = requests.post(url, headers=headers, data=json.dumps(payload))
tx_hash = response.json()["result"]
print(f"Transaction hash: {tx_hash}")

Subscribe to New Blocks (WebSocket)

const WebSocket = require('ws');

const ws = new WebSocket('wss://api-xxnetwork.n.dwellir.com/YOUR_API_KEY');

ws.on('open', () => {
  ws.send(JSON.stringify({
    jsonrpc: '2.0',
    method: 'chain_subscribeNewHeads',
    params: [],
    id: 1
  }));
});

ws.on('message', (data) => {
  const response = JSON.parse(data);
  if (response.params?.result) {
    console.log('New block:', response.params.result);
  }
});

Error Handling

xx Network RPC errors follow the JSON-RPC 2.0 error format:

{
  "jsonrpc": "2.0",
  "error": {
    "code": -32602,
    "message": "Invalid params",
    "data": "Expected hex-encoded hash"
  },
  "id": 1
}

Common Error Codes

Code	Message	Description
-32700	Parse error	Invalid JSON
-32600	Invalid request	Missing required fields
-32601	Method not found	Unknown RPC method
-32602	Invalid params	Invalid method parameters
-32603	Internal error	Node processing error
-32000	Server error	Custom server errors

Best Practices

1. Connection Management

• Use WebSocket connections for subscriptions and real-time updates
• Implement reconnection logic for WebSocket disconnections
• Use HTTPS for single queries and transactions

2. Error Handling

• Always check for error responses before processing results
• Implement retry logic with exponential backoff
• Log errors for debugging and monitoring

3. Performance Optimization

• Batch multiple queries when possible
• Cache frequently accessed data like metadata
• Use specific block hashes for deterministic queries

4. Security

• Never expose API keys in client-side code
• Validate all input data before submission
• Use secure storage for private keys

5. Privacy & Quantum Resistance

• All transactions benefit from automatic metadata shredding via cMixx
• Quantum-resistant cryptography is built into the protocol
• No special configuration required for privacy protection

SDK Support

Official Libraries

• @polkadot/api - JavaScript/TypeScript SDK (compatible with xx Network)
• py-substrate-interface - Python SDK
• subxt - Rust SDK
• go-substrate-rpc-client - Go SDK

Integration Example

// Using @polkadot/api
const { ApiPromise, WsProvider } = require('@polkadot/api');

async function connect() {
  const provider = new WsProvider('wss://api-xxnetwork.n.dwellir.com/YOUR_API_KEY');

  const api = await ApiPromise.create({ provider });

  // Query chain data
  const chain = await api.rpc.system.chain();
  console.log(`Connected to ${chain}`);

  // Get account balance
  const account = 'YOUR_ADDRESS';
  const { data: balance } = await api.query.system.account(account);
  console.log(`Balance: ${balance.free.toString()}`);

  return api;
}

Privacy Features

cMixx Metadata Shredding

xx Network's revolutionary cMixx protocol automatically obscures transaction metadata, preventing third parties from connecting senders to recipients. This happens transparently for all transactions:

// Standard transfer - metadata is automatically shredded
const transfer = api.tx.balances.transfer(recipient, amount);
const hash = await transfer.signAndSend(senderKeyPair);

// Privacy protection is built-in, no special configuration needed

Quantum-Resistant Cryptography

All transactions on xx Network are protected against quantum computing attacks using post-quantum cryptographic primitives. Your applications are future-proof by default.

Haven Messenger

xx Network includes Haven, a privacy-first messaging system built into the protocol. Developers can leverage Haven for secure communications within their applications.

Additional Resources

• xx Network Website
• xx Network 2025 Roadmap
• Substrate Documentation
• xx Network Explorer
• Haven Messenger

Support

For additional support or questions:

• Email: support@dwellir.com
• Documentation: docs.dwellir.com

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Method Categories

Select a category below to explore detailed method documentation: