📄️ Zap Request
To initiate a payment across the open network, a client generates a Kind 5520 (Zap Request) event.
📄️ Zap Receipt
A Kind 5521 (Zap Receipt) is the open standard published by a Lightning Network provider after a Lightning invoice has been successfully paid.
📄️ On-Behalf Zap Request
A specialized NIP-57 variant designed to explicitly proxy legacy off-chain identities
📄️ Identity Connection
A Kind 35521 is a publicly verifiable Nostr event published by an end-user to announce that their Nostr public key is linked to a Legacy Identity Provider (LIDP) account.
📄️ IA Attestation
As part of Zapf's open identity model, a Kind 35522 (IA Attestation) is the cryptographic proof generated by an Identity Authority (IA) stating: "I have verified that Nostr Public Key X owns LIDP Account Y."
📄️ LNURL Integration
The Zap Protocol implements the open LUD-06 and LUD-16 standards to bridge Lightning Network wallets with Nostr identity resolution.