xDeed: Real-World Asset Tokenization Custody

import { createDeedCustodyManager } from '@private.me/xdeed';

// Initialize custody manager
const manager = createDeedCustodyManager();

// Store deed with 2-of-3 threshold custody
const result = await manager.storeDeed(propertyDeed, 2, 3, {
  custodians: ['did:key:alice', 'did:key:bob', 'did:key:charlie'],
  enableMPC: true,
  doubleXorida: true
});

// Sign transfer transaction
const result = await manager.signTransfer(deedId, transfer, signers);

// Under the hood (2-of-3 threshold):
// 1. Retrieve 2 shares from custodians
// 2. HMAC verification on each share (~25µs per share)
// 3. Double XorIDA reconstruction (~1ms)
// 4. Sign transaction with reconstructed key
// 5. Memory purge (~20µs)
// Total: ~5ms (network-bound)

// 1. Set environment variable
// .env file:
XDEED_INVITE_CODE=https://xdeed.private.me/invite/XDEED-abc123

// 2. Create custody arrangement (auto-accepts invite)
import { createDeedCustodyManager } from '@private.me/xdeed';

const deed = {
  id: 'deed-001',
  propertyId: 'prop-12345',
  owner: 'did:key:z6MkhaXgBZDvotDkL5257faiztiGiC2QtKLGpbnnEGta2doK',
  legalDescription: 'Lot 42, Block 7, Springfield Estates',
  tokenAddress: '0x1234567890abcdef',
  metadata: {
    address: '742 Evergreen Terrace, Springfield',
    propertyType: 'residential',
    assessedValue: 50000000,
    currency: 'USD'
  }
};

const custodians = [
  'did:key:z6MkhaXgBZDvotDkL5257faiztiGiC2QtKLGpbnnEGta2doK',
  'did:key:z6MkqRYqQiSgvZQdnBytw86Qbs2ZWUkGv22od935YF4s8M7V',
  'did:key:z6Mks8mvCnVx4HQcoq7ZwvpTbMnoRGudHSiEpXhMf6VW8XMg'
];

const manager = createDeedCustodyManager();
const result = await manager.storeDeed(deed, 2, 3, {
  custodians,
  doubleXorida: true,
  onProgress: (percent, msg) => console.log(`[${percent}%]`, msg)
});

if (result.ok) {
  console.log('✅ Deed custody established');
  console.log('✅ Shares distributed to custodians');
  console.log('✅ Custody metadata encrypted');
}

// What happened:
// 1. Invite auto-accepted from XDEED_INVITE_CODE env var
// 2. Custodian DIDs generated and saved to .env
// 3. Signing key split via Double XorIDA (2-of-3)
// 4. Shares distributed to custodians
// 5. Custody metadata encrypted with AES-256-GCM
// Total time: ~15 seconds

# Step 1: Install CLI globally
npm install -g @private.me/xdeed

# Step 2: Initialize (generates custodian DIDs, saves to .env)
xdeed init

# Output:
# Generating custodian DIDs...
# ✅ Custodian A DID: did:key:z6Mk...
# ✅ Custodian B DID: did:key:z6Mk...
# ✅ Custodian C DID: did:key:z6Mk...
# ✅ Saved to .env
# ✅ Custodian network configured: https://xdeed.private.me
# Ready to create custody arrangements

# Step 3: Create first custody arrangement
xdeed custody \
  --asset property-deed-001 \
  --custodians alice,bob,charlie \
  --threshold 2-of-3 \
  --double-xorida

# Output:
# ✅ Signing key split (2-of-3)
# ✅ Shares distributed to custodians
# ✅ Custody metadata encrypted
# ✅ Ready to sign: xdeed sign --asset property-deed-001

import { AssetCustody } from '@private.me/xdeed';

const custody = await AssetCustody.create({
  assetId: 'property-deed-0x1234',
  custodians: [custA, custB, custC, custD, custE],
  threshold: { k: 3, n: 5 },
  doubleXorida: true
});