BIP329 — Wallet Labels Wallets maintain user-supplied labels: "Coffee shop", "Friend Alice", "Cold storage 1". Pre-BIP329, labels were proprietary per wallet and lost on migration. BIP329 standardizes a portable JSON Lines format. Format One JSON object per line (NDJSON / JSONL): Type field values | Type | semantics | |------|----------------| | | txid | | | address | | | hex-encoded pubkey | | | xpub serialization | | | | | | | Optional fields Spendability hint For UTXOs that are part of a multi-step protocol (vault unvault, LN HTLC, frozen for CoinJoin), the wallet may mark them . Importing…