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SIP (Shielded Intents Protocol) brings privacy to cross-chain transactions. One toggle to shield your sender, amount, and recipient—while maintaining compliance with viewing keys.

// Create a private cross-chain swap
const intent = await sip
  .intent()
  .input('solana', 'SOL', 1_000_000_000n)
  .output('zcash', 'ZEC', 50_000_000n)
  .privacy(PrivacyLevel.SHIELDED)  // ← One toggle
  .build()

Enables:

• ✅ Hidden sender identity (Pedersen commitments)
• ✅ Hidden transaction amounts
• ✅ Unlinkable recipients (stealth addresses)
• ✅ Selective disclosure for compliance (viewing keys)
• ✅ Multi-chain privacy via NEAR Intents

# npm
npm install @sip-protocol/sdk

# pnpm
pnpm add @sip-protocol/sdk

import { SIP, PrivacyLevel } from '@sip-protocol/sdk'

// Initialize
const sip = new SIP()

// Create private cross-chain swap
const intent = await sip
  .intent()
  .input('solana', 'SOL', 1_000_000_000n)
  .output('zcash', 'ZEC', 50_000_000n)
  .privacy(PrivacyLevel.SHIELDED)
  .build()

// Intent now has:
// - Hidden sender (Pedersen commitment)
// - Hidden amount (Pedersen commitment)
// - Stealth recipient address

// Generate viewing key for auditors
const viewingKey = sip.generateViewingKey('/m/44/501/0/audit')

// Create compliant private intent
const intent = await sip
  .intent()
  .input('ethereum', 'ETH', 1_000_000_000_000_000_000n)
  .output('near', 'NEAR', 100_000_000_000_000_000_000_000n)
  .privacy(PrivacyLevel.COMPLIANT)
  .build()

// Auditor can decrypt transaction details with viewingKey

┌─────────────────────────────────────────────────────────────┐
│                    SIP PROTOCOL STACK                       │
├─────────────────────────────────────────────────────────────┤
│  PRIVACY LAYER (SIP)          ← We build this               │
│  • Pedersen Commitments  • Stealth Addresses                │
│  • Viewing Keys          • Shielded Intents                 │
├─────────────────────────────────────────────────────────────┤
│  SETTLEMENT LAYER             ← We leverage this            │
│  • NEAR Intents         • Chain Signatures                  │
├─────────────────────────────────────────────────────────────┤
│  BLOCKCHAIN LAYER             ← We connect to this          │
│  • NEAR  • Ethereum  • Solana  • Bitcoin  • More...         │
└─────────────────────────────────────────────────────────────┘

SIP is an application layer that complements NEAR Intents and Zcash—not a competing infrastructure protocol.

Cross-chain transactions are public by default:

• ❌ Anyone can see your wallet address
• ❌ Anyone can see transaction amounts
• ❌ Anyone can link your transactions
• ❌ No privacy = security risk for high-value users

SIP adds privacy to NEAR Intents:

• ✅ Stealth addresses - One-time recipient addresses
• ✅ Pedersen commitments - Hide amounts cryptographically
• ✅ Viewing keys - Selective disclosure for compliance
• ✅ Multi-chain - Works across any NEAR-connected chain

• M1: Architecture & Specification
• M2: Cryptographic Core (Pedersen, stealth addresses)
• M3: SDK Production (validation, errors, tests)
• M4: Network Integration (NEAR, Zcash, wallet adapters)

• M5: Documentation & Launch

• Real ZK circuits (Noir + Halo2)
• Private payments API
• DAO treasury integration
• Hardware wallet support

• ⭐ Star repositories you find useful
• 🐛 Report issues to help us improve
• 💡 Suggest features in GitHub Discussions
• 🔧 Submit PRs with improvements