How It Works

Pridge achieves privacy through a simple but effective mechanism: disposable intermediate addresses.

The Flow

┌─────────────────────────────────────────────────────────────┐
│                         STEP 1: GENERATE                     │
│  Browser generates fresh Solana keypair                      │
│  Private key stored only in memory                           │
└─────────────────────────────────────────────────────────────┘
                              │
                              ▼
┌─────────────────────────────────────────────────────────────┐
│                         STEP 2: BRIDGE                       │
│  Connect MetaMask → Select chain → Enter amount              │
│  deBridge transfers assets to disposable address             │
└─────────────────────────────────────────────────────────────┘
                              │
                              ▼
┌─────────────────────────────────────────────────────────────┐
│                         STEP 3: SAVE LINK                    │
│  Claim URL contains private key in fragment                  │
│  Example: pridge.io/#<base58_encoded_private_key>           │
└─────────────────────────────────────────────────────────────┘
                              │
                              ▼
┌─────────────────────────────────────────────────────────────┐
│                         STEP 4: CLAIM                        │
│  Open claim link → Enter destination → Claim                 │
│  Funds transfer to any Solana wallet                         │
└─────────────────────────────────────────────────────────────┘

Why URL Fragments?

The private key is stored in the URL fragment (the part after #):

https://pridge.io/#3bkJCGFKYvkogDh3fjv8VLsCVmFn9tt...
                   ↑
                   Fragment (never sent to server)

Per HTTP specification, URL fragments are never transmitted to servers. They exist only in your browser.

The Privacy Guarantee

On-chain, the only visible transactions are:

1. Source → Disposable: Your EVM wallet sends to a random Solana address
2. Disposable → Destination: The disposable address sends to your final wallet

There is no transaction linking these two. The disposable address is:

• Generated randomly
• Used once
• Discarded after claiming

Technical Components

Keypair Generation

// Uses Solana's Keypair.generate() with browser's crypto.getRandomValues()
const disposable = Keypair.generate();

Claim Link Encoding

// Private key encoded as base58
const fragment = bs58.encode(keypair.secretKey);
const claimUrl = `${origin}/#${fragment}`;

Asset Transfer

On claim, Pridge:

1. Checks for SPL tokens (including wSOL)
2. Automatically unwraps wSOL to native SOL
3. Transfers all assets to the destination
4. Closes token accounts (recovers rent)

What deBridge Sees

deBridge processes the cross-chain transfer but only knows:

• Source: Your EVM wallet address
• Destination: The disposable Solana address

They never see your final destination wallet.