Coconut Open Source
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Coconut Open Source Software Projects

“To help even one more person encounter Bitcoin the right way.”

Self-custody you can verify.

Coconut builds open Bitcoin self-custody tools that families can use with confidence today and pass on for generations.

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01

Our philosophy

Simple enough for every family. Durable enough for generations.

Coconut began with a personal question: could we confidently recommend Bitcoin self-custody to our own parents and children? Our answer is to help people navigate Bitcoin's complexity with understanding—not hide it behind another trusted intermediary.

01

Confidence through understanding

People should not need to become experts, but they should be helped to understand the choices they make as they use Bitcoin.

02

Open standards over lock-in

PSBTs, descriptors, QR communication, and hardware wallet interoperability preserve choice across tools.

03

Designed for the long term

Self-custody should support not only secure use today, but recovery, continuity, and an eventual handoff to the next generation.

02

The projects

Open tools for verifiable self-custody.

Coconut develops its projects with Dart and Flutter to support Bitcoin wallet development optimized for mobile devices.

01Bitcoin library

coconut_lib

A Dart library for building mobile, air-gapped Bitcoin wallets and signers.

DartMIT
View repository
02Watch-only wallet

coconut_wallet

A watch-only Bitcoin wallet that syncs balances, creates transactions, and broadcasts signed transactions.

FlutterMIT/X11
View repository
03Offline signer

coconut_vault

An offline Bitcoin signer for managing keys and signing transactions on a network-disconnected device.

FlutterMIT/X11
View repository
04UI components

coconut_design_system

A reusable Flutter UI component library for building consistent Coconut application experiences.

FlutterMIT
View repository

03

How it fits together

Designed for stronger security and better usability.

Coconut separates each responsibility with purpose. coconut_lib is isolated to strengthen security, while coconut_design_system is separated to improve usability. coconut_wallet and coconut_vault remain distinct to preserve a strict air-gapped model: Wallet handles online coordination, while keys and signing stay offline in Vault.

Built on open Bitcoin standardsView source list
BIP-11M-of-N standard transactionsBIP-32Hierarchical deterministic walletsBIP-39Mnemonic codes for deterministic keysBIP-44Multi-account HD wallet hierarchyBIP-48Multi-script hierarchy for multisig walletsBIP-67Deterministic multisig key sortingBIP-84Key derivation for native SegWit P2WPKHBIP-86Key derivation for single-key P2TRBIP-129Bitcoin Secure Multisig Setup (BSMS)BIP-142Address format for Segregated WitnessBIP-143Signature verification for v0 witness programsBIP-173Bech32 addresses for native witness outputsBIP-174Partially Signed Bitcoin Transactions (PSBT)BIP-327MuSig2 multisignatures compatible with BIP-340BIP-340Schnorr signatures for secp256k1BIP-341Taproot and SegWit v1 spending rulesBIP-370PSBT version 2BIP-371Taproot fields for PSBTBIP-380General operation of output script descriptorsBIP-381Non-SegWit output script descriptorsBIP-382SegWit output script descriptorsBIP-383Multisig output script descriptors

04

Proof of work

Public work, verifiable at the source.

Coconut has been developed in public since March 2024, beginning in the pow_wallet repositories before moving to the current Coconut repositories. This dated snapshot links directly to the commit histories, releases, and source records behind the project.

4Public repositories
6,340Public commits
42GitHub releases
2024.03Developed in public since
RepositoryCommitsReleasesPublic sinceSource
coconut_lib363182024-09-13Inspect
coconut_wallet3,515192024-09-06Inspect
coconut_vault2,15552024-09-06Inspect
coconut_design_system307—2025-02-03Inspect

Last verified: August 10, 2026. Commit and release totals show the extent of public activity, not a ranking of quality or impact.

Selected milestones

Coconut Open Store

Planned launch of an open store where contributors can improve Coconut features and receive incentives for meaningful contributions.

Taproot inheritance policy

Released support for importing Taproot inheritance wallets from Coconut Vault and spending through their inheritance policy.

Multisig support

Released multisignature wallet support in Coconut Wallet, enabling coordinated self-custody across multiple signers.

Mainnet wallet released

Released Coconut Wallet for real Bitcoin self-custody on mainnet.

coconut_design_system begins

Recorded the first public commit for Coconut's reusable Flutter components.

REGTEST wallet released

Released the practice edition of Coconut Wallet for learning self-custody with valueless Regtest bitcoin.

Migrated to Coconut repositories

Moved the shared library on September 13 and the Wallet and Vault codebases on September 19 into the current Coconut repositories.

Coconut project begins

Started with pow_wallet; the original shared library, pow_wallet_lib, followed on April 8, 2024.

Review source evidence

05

Contributors

Built by people who chose to work in the open.

A diverse group of contributors has made many contributions across Coconut's repositories.

ella@ella-noncelab

Contributed tolib / wallet / vault / design

doey@doey-noncelab

Contributed tolib / wallet / vault / design

NonceLab Inc.@noncelab

Contributed tolib / wallet / vault / design

louis@louis-noncelab

Contributed tolib / wallet / vault

pio@pio-noncelab

Contributed towallet / vault / design

roy@roy-noncelab

Contributed towallet / vault / design

luke@luke-noncelab

Contributed towallet / vault / design

jay@jay-noncelab

Contributed towallet / vault / design

doey@doey-default

Contributed towallet / vault / design

Jayhk@jhk-im

Contributed towallet / vault

Roy Lee@asheswook

Contributed towallet

Hakkadaikon@Hakkadaikon

Contributed towallet

JM@4xvgal

Contributed towallet

tiger@tiger-noncelab

Contributed towallet

Jacksper13@Jacksper13

Contributed towallet

Yumin Kim@Yumin2019

Contributed tovault

06

Licenses & permissions

Open code, clearly stated rights.

Subject to each project's license terms, you may use, copy, modify, distribute, sublicense, and commercially use the code. Copyright and permission notices must be retained.

  • 01Use
  • 02Copy
  • 03Modify
  • 04Distribute
  • 05Sublicense
  • 06Sell
coconut_libMIT coconut_walletMIT/X11 coconut_vaultMIT/X11 coconut_design_systemMIT

Software is provided “as is,” without warranty. Software licenses do not grant rights to Coconut or NonceLab trademarks. The license text in each repository is authoritative.

07 / Contribute

Inspect it. Question it. Improve it with us.

Read the code, open an issue for something you find, or propose an improvement. Review each repository's contribution guide and responsible disclosure policy before contributing.

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