Zceipt · ZIP 311 for Orchard & Ironwood

Prove one Zcash payment. Keep your viewing key.

A receipt shows who was paid, how much and the memo for a single shielded transaction, and proves it was signed by the key that spent the money. No viewing key changes hands. The proof is checked in this browser; only public chain data is fetched.

Receipt or link

Make a receipt from your wallet's viewing key

More examples

Settings: server, or offline

grpc-web lightwalletd (default for mainnet: zcash-mainnet.chainsafe.dev) Or paste the raw transaction hex and its block height, and nothing is fetched at all

Ask someone to prove they paid you

Your address (the payee) Amount you expect (ZEC, optional) Label (optional, stays in your browser and the link)

Check a payment link

A zcash: link, as you'd put in an invoice or QR code, or a signed request (zreq1…) to check before paying

How it works

Each disclosed output comes with the one key that opens only that output. Your browser opens it from the transaction on chain and checks the two match.
The payer's wallet proves, with a fresh zero-knowledge proof, that it holds the key that spent the money in this transaction, and signs the whole receipt with that key. Someone who only saw the payment can't.
A signed message, such as an invoice number or your request's code, ties the receipt to one purpose.

zceipt create --ufvk @key.txt --birthday <height> --txid <txid> -m "Invoice 42" --unsigned r.txt zceipt sign r.txt --seed-stdin zceipt verify 'https://…#zip311r1…'

RECEIPT

Open a receipt link, or paste one.
The verified payment prints here.