Provncloud SDK (TypeScript/Node.js)

Official TypeScript/JavaScript SDK for privacy-preserving digital signatures and data anchoring.

Provncloud SDK allows you to cryptographically sign data and anchor it to blockchain networks like Arweave AO and Solana without revealing the raw content. It uses a high-performance WebAssembly (WASM) core to ensure cryptographic integrity and cross-platform consistency.

🚀 Installation

Using npm:

npm install @provncloud/sdk

Using yarn:

yarn add @provncloud/sdk

💻 Usage

The SDK is designed to worked in both Node.js and Browser environments.

import { ProvnSDK, initSDK } from '@provncloud/sdk';

async function main() {
  // 1. Initialize the WASM engine
  await initSDK();
  
  const sdk = new ProvnSDK();

  // 2. Generate a new Ed25519 keypair
  const identity = sdk.generateKeypair();

  // 3. Create and sign a claim
  const claim = sdk.createClaimNow("User Verified Identity #1234");
  const signed = sdk.signClaim(claim);

  // 4. Verify (Offline)
  const isValid = sdk.verifyClaim(signed);
  console.log("Signature valid:", isValid);
}

main();

🛠 Features

• High Performance: Cryptographic core implemented in Rust and compiled to WASM.
• Protocol Consistency: Strictly follows JCS (RFC 8785) for canonical JSON serialization.
• Unified API: Synchronous signing and verifying after WASM initialization.
• Cross-Platform: Compatible with Node.js 18+ and all modern browsers.

📚 Resources

• Monorepo & Examples
• Protocol Spec

⚖️ License

MIT License. See LICENSE for details.