Using LNURL and Lightning addresses

The Breez SDK - Spark supports the following LNURL functionality:

• Sending payments using LNURL-Pay/Lightning address (including BIP353 addresses)
• Managing contacts — Save frequently used Lightning addresses for quick access
• Receiving payments using LNURL-Pay/Lightning address
• Receiving payments using LNURL-Withdraw
• Using LNURL-Auth
• LNURL-Verify — Payment verification via LUD-21 and Nostr Zap receipts via NIP-57.