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A Dart implementation for Flutter of BIP-329: Wallet Labels Export Format for Bitcoin wallets.
Last release 3 months ago
30 Jun 2026
Ships fairly regularly
a new release about every 5 months
Nearly every release is documented
notes for 3 of 3 stable releases
Nothing withdrawn
no release was ever pulled
1 years old
3 releases · first in 2025
One column per month.
Breaking — `OutputLabel.spendable` is now `bool?` (was required `bool`): per BIP-329 spendable is optional and "if omitted, the importing wallet shoul
OutputLabel.spendable is now bool? (was required bool): per BIP-329 spendable is optional and "if omitted, the importing wallet should not alter these values", so an omitted spendable now parses to null (the spec's "do not alter" state) instead of throwing — previously a valid BIP-329 output record without spendable failed to parse. Consumers reading the field must handle null (e.g. check spendable == false for an explicitly do-not-spend output).ignoreNull): optional fields that are null are no longer emitted as "field": null; they are omitted, matching the spec's examples, and an absent spendable round-trips as absent.^3.8.0 (minimum required by flutter_lints ^6.0.0); dart_mappable runtime constraint unchanged (^4.6.0) so consumer compatibility is otherwise preserved.remove linter infos from example
All 6 label types: tx, addr, pubkey, input, output, xpub
tx, addr, pubkey, input, output, xpubtype, ref, labelorigin, spendableheight, time, fee, value, ratekeypath, heightskeypath, value, fmv, height, timeBip329Label.toJsonLines() - Export to newline-delimited JSONBip329Label.fromJsonLines() - Import from newline-delimited JSONYour coding agent can read these notes before it upgrades. Set up the MCP server →