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Replace Guava <code>UnsignedBytes.checkedCast</code>

good first issueGood for newcomersGood for newcomers

GuavaAn issue related to the use or planned removal of the Google Guava dependency.An issue related to the use or planned removal of the Google Guava dependency.

Status: Open.

#4009 In bitcoinj/bitcoinj;

· msgilligan opened on Jan 13, 2026

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0.18

Finish serialization refactoring in DeterministicKey

Status: Open.

#4008 In bitcoinj/bitcoinj;

· msgilligan opened on Jan 13, 2026

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0.18

Write deterministic/functional Bloom Filter tests

Status: Open.

#4006 In bitcoinj/bitcoinj;

· msgilligan opened on Jan 13, 2026

Deprecate <code>WalletExtension</code> class for removal

Developer discussiondiscussion between developers about a specific topicdiscussion between developers about a specific topic

Status: Open.

#3997 In bitcoinj/bitcoinj;

· msgilligan opened on Jan 9, 2026

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0.18

Replace remaining usages of Guava's <code>BaseEncoding</code>

EnhancementRequest for enhancement, or the implementation of oneRequest for enhancement, or the implementation of one

good first issueGood for newcomersGood for newcomers

GuavaAn issue related to the use or planned removal of the Google Guava dependency.An issue related to the use or planned removal of the Google Guava dependency.

Status: Open.

#3982 In bitcoinj/bitcoinj;

· msgilligan opened on Jan 5, 2026

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0.18

<code>wallet-tool</code> throws <code>DateTimeException</code> on <code>rotate</code> when <code>--date=YYYY-MM-DD</code> is provided

Status: Open.

#3969 In bitcoinj/bitcoinj;

· msgilligan opened on Dec 12, 2025

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0.18

Add RIPEMD160 implementation to <code>bitcoinj-base</code> module

Status: Open.

#3964 In bitcoinj/bitcoinj;

· msgilligan opened on Dec 9, 2025

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0.18

Bitcoin transaction with long OP_RETURN fails to broadcast

ball in their court

Status: Open.

#3955 In bitcoinj/bitcoinj;

· ronaldoguedess opened on Nov 3, 2025

Deprecate and remove <code>BriefLogFormatter</code>

Status: Open.

#3916 In bitcoinj/bitcoinj;

· msgilligan opened on Sep 27, 2025

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0.19

Crypto "utils" API to abstract and reduce use of Bouncy Castle

EnhancementRequest for enhancement, or the implementation of oneRequest for enhancement, or the implementation of one

Status: Open.

#3912 In bitcoinj/bitcoinj;

· msgilligan opened on Sep 25, 2025

Create experimental Schnorr/Taproot module

Status: Open.

#3876 In bitcoinj/bitcoinj;

· msgilligan opened on Sep 13, 2025

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0.18

java.nio.channels.CancelledKeyException: null

Status: Open.

#3868 In bitcoinj/bitcoinj;

· lazyhunter9 opened on Sep 4, 2025