📄️ Identity Authority (IA)
An Identity Authority (IA) is a service that verifies a user's ownership of a legacy account (like Discord, X, or Email) and issues cryptographic proof of that ownership on the Nostr network.
📄️ LNURL Server
The LNURL server is the payment side of AltZap. It is the same role NIP-57 ↗ calls the "lnurl server" (LNURL's "LN SERVICE"): the server behind a Lightning address that turns a zap request into an invoice and publishes the receipt. Zapf runs one.
📄️ Web Identities
A Web Identity is any traditional identity or social platform that an Identity Authority (IA) uses to verify a user's ownership of an account.
📄️ The Fallback Address
How Zapf ensures payments never fail by safely holding funds for users without wallets.
📄️ Verification Model
When a client shows a zap to or from a Discord, X or email account, it wants to show the person's real Nostr profile — but only if that link has been verified. The rules are NIP-IC's Verification Model; this page is the short version.