How to Use GhostReceipt

Generate a privacy-preserving payment receipt and share a verifiable proof link.

Step 1: Enter Transaction Details

• Chain: Choose Bitcoin or Ethereum.
• Transaction Hash: Paste the on-chain transaction identifier.
• Claimed Amount: Enter your minimum claim threshold (satoshis for BTC, wei for ETH).
• Minimum Date: Set the earliest acceptable transaction date.

Step 2: Generate Proof

Click Generate Receipt. GhostReceipt will:

1. Fetch oracle-signed canonical chain data for the transaction hash.
2. Build a local witness from your claim and signed payload.
3. Generate the zero-knowledge proof in your browser.

Step 3: Share Receipt

After successful generation, you can:

• Copy URL: Share a verification link directly.
• Native Share: Open your device share sheet (when available).
• Social Share: Post to X, Reddit, or LinkedIn.
• QR Export: Download and share a QR code.

What Verification Confirms

• Claimed amount threshold is satisfied.
• Claimed minimum date threshold is satisfied.
• Proof and signature validations pass cryptographic checks.

What Stays Private

• Sender and receiver wallet details are not exposed in receipt claims.
• Exact raw transaction details are not required for the verifier to validate claims.
• Sensitive witness inputs remain client-side during proof generation.

Troubleshooting

• Invalid hash format: BTC expects 64 hex chars, ETH expects 0x + 64 hex chars.
• Proof failure: Re-check that claim amount/date are consistent with the on-chain transaction.
• Clipboard errors: Allow browser clipboard permissions and retry.