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@ -178,6 +178,30 @@ When an event includes a `zap` tag, clients SHOULD calculate the lnurl pay reque
} }
``` ```
### Appendix H: Partially Complete Zap Receipt
LNURL Servers SHOULD return a Partially complete Zap Receipt together with the payment request in step 6. This allows clients to republish the receipt to "proof" a payment has been made, even when the LNURL server fails or refuses to publish the Zap receipt. In order to stop a client from publishing the receipt without ever paying the invoice, the LNURL server removes the value of the preimage-tag before sending it back in the response, making the receipt an invalid event until the paying client has paid the invoice to discover the preimage themselves.
Example `Partially complete zap receipt`:
```json
{
"id": "67b48a14fb66c60c8f9070bdeb37afdfcc3d08ad01989460448e4081eddda446",
"pubkey": "9630f464cca6a5147aa8a35f0bcdd3ce485324e732fd39e09233b1d848238f31",
"created_at": 1674164545,
"kind": 9735,
"tags": [
["p", "32e1827635450ebb3c5a7d12c1f8e7b2b514439ac10a67eef3d9fd9c5c68e245"],
["e", "3624762a1274dd9636e0c552b53086d70bc88c165bc4dc0f9e836a1eaf86c3b8"],
["bolt11", "lnbc10u1p3unwfusp5t9r3yymhpfqculx78u027lxspgxcr2n2987mx2j55nnfs95nxnzqpp5jmrh92pfld78spqs78v9euf2385t83uvpwk9ldrlvf6ch7tpascqhp5zvkrmemgth3tufcvflmzjzfvjt023nazlhljz2n9hattj4f8jq8qxqyjw5qcqpjrzjqtc4fc44feggv7065fqe5m4ytjarg3repr5j9el35xhmtfexc42yczarjuqqfzqqqqqqqqlgqqqqqqgq9q9qxpqysgq079nkq507a5tw7xgttmj4u990j7wfggtrasah5gd4ywfr2pjcn29383tphp4t48gquelz9z78p4cq7ml3nrrphw5w6eckhjwmhezhnqpy6gyf0"],
["description", "{\"pubkey\":\"32e1827635450ebb3c5a7d12c1f8e7b2b514439ac10a67eef3d9fd9c5c68e245\",\"content\":\"\",\"id\":\"d9cc14d50fcb8c27539aacf776882942c1a11ea4472f8cdec1dea82fab66279d\",\"created_at\":1674164539,\"sig\":\"77127f636577e9029276be060332ea565deaf89ff215a494ccff16ae3f757065e2bc59b2e8c113dd407917a010b3abd36c8d7ad84c0e3ab7dab3a0b0caa9835d\",\"kind\":9734,\"tags\":[[\"e\",\"3624762a1274dd9636e0c552b53086d70bc88c165bc4dc0f9e836a1eaf86c3b8\"],[\"p\",\"32e1827635450ebb3c5a7d12c1f8e7b2b514439ac10a67eef3d9fd9c5c68e245\"],[\"relays\",\"wss://relay.damus.io\",\"wss://nostr-relay.wlvs.space\",\"wss://nostr.fmt.wiz.biz\",\"wss://relay.nostr.bg\",\"wss://nostr.oxtr.dev\",\"wss://nostr.v0l.io\",\"wss://brb.io\",\"wss://nostr.bitcoiner.social\",\"ws://monad.jb55.com:8080\",\"wss://relay.snort.social\"]]}"],
["preimage", ""]
],
"content": "",
"sig": "b0a3c5c984ceb777ac455b2f659505df51585d5fd97a0ec1fdb5f3347d392080d4b420240434a3afd909207195dac1e2f7e3df26ba862a45afd8bfe101c2b1cc"
}
```
## Future Work ## Future Work
Zaps can be extended to be more private by encrypting `zap request` notes to the target user, but for simplicity it has been left out of this initial draft. Zaps can be extended to be more private by encrypting `zap request` notes to the target user, but for simplicity it has been left out of this initial draft.