Sparrow Wallet Release 1.6.6

• Integrated Auth47 authentication with browser-based auth: URL handling
• Implemented LNURL-auth support via lightning: URL browser handling
• Extended BIP47 compatibility to Bitcoin Core connections
• Optimized BIP47 notification transaction change spending (@maxtannahill)
• Introduced BIP38 encrypted private key sweeping functionality
• Restricted PayNym sending to previously notified recipients only
• Enhanced taproot-specific sighash selection in dropdown menu
• Added optional transaction count column to address table
• Improved private server reconnection timing
• Enabled cross-account postmix wallet mixing
• Implemented label transfer from deposit to badbank UTXOs
• Expanded wallet tab tooltips for load failure scenarios
• Optimized entry cell sizing and address class efficiency
• Improved UTXO retrieval and selection processes
• Prioritized libsecp256k1 for public key derivation
• Implemented address data storage for non-passphrase wallets
• Added wallet database compaction on closure
• Enhanced deep wallet transaction creation feedback
• Implemented duplicate wallet name checking
• Refined multisig address handling for message signing
• Added Telegram support group access via Help menu
• Improved wallet deletion dialog and unconfirmed transaction tooltips
• Implemented custom ‘min relay fee not met‘ error dialog
• Extended transaction diagram label context menus
• Enforced non-empty passwords for encrypted wallets
• Streamlined BIP39 wallet import process
• Clarified empty passphrase display in seed view dialog
• Added UTXO selection count indicator
• Improved HWI temporary file management
• Updated H2 database to 2.1.214
• Upgraded to Gradle 7.5 and Java 18.0.1

Bug Fixes

• Corrected historical notification transaction node retrieval
• Fixed encrypted keystore saving across child wallets
• Ensured comprehensive Whirlpool account discovery on wallet import
• Refined transaction sorting for parent/child transactions in same block
• Improved case-insensitive address and transaction output searching
• Prevented duplicate xpubs in multisig wallet keystores
• Resolved multisig wallet account addition issues
• Optimized BIP47 wallet xpub handling
• Implemented locale-insensitive text case conversion
• Enabled PSBT support without previous UTXO data