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PrivKey

Open-source infrastructure for Bitcoin, Lightning, and Nostr. Self-custodial key management, FROST threshold signing, and high-performance relays.
README.md

PrivKey

Open-source infrastructure for Bitcoin, Lightning, and Nostr. FROST threshold signing, self-custodial key management, and high-performance relays in Rust, Zig, and C. MIT licensed and self-hostable.

Keep, self-custodial key management for Nostr and Bitcoin, so no single device holds the whole key: keep (Rust), keep-android (Kotlin), keep-esp32 (C), keep-startos (TypeScript).

Libraries: libnostr-c, libnostr-z.

Tools: wisp (Nostr relay), noz (Nostr CLI), taproot-assets-rest-gateway, bosun (Bitcoin PR triage).

We upstream our fixes: Bitcoin Core, Bitcoin Knots, BDK, rust-miniscript, ZF FROST, Lightning BOLTs, negentropy. Current list at privkey.io.

Building since 2018. privkey.io · information@privkey.io · book a consultation

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  1. keep keep Public

    Self-custodial key management for Nostr and Bitcoin

    Rust 15 2

  2. wisp wisp Public

    Fast, lightweight Nostr relay with spider mode that syncs notes from people you follow.

    Zig 17

  3. libnostr-z libnostr-z Public

    Zig library for the Nostr protocol

    Zig 15

  4. libnostr-c libnostr-c Public

    Lightweight, portable C library for the Nostr protocol with native Lightning Network integration.

    C 13 1

  5. keep-android keep-android Public

    Android app for FROST threshold signing with NIP-55 support

    Kotlin 9 2

  6. shrike shrike Public

    Forked from sparrowwallet/sparrow

    Desktop Bitcoin wallet for the BLAKE2b hardfork. Sparrow fork adding unified opt-in sighash support.

    Java 24 1

Repositories

Showing 10 of 81 repositories
  • seedsigner Public Forked from SeedSigner/seedsigner

    Unofficial SeedSigner fork that signs with the unified opt-in signature hash for the Bitcoin hardfork. Not audited.

    privkeyio/seedsigner's past year of commit activity
    Python 7 MIT 350 0 0 Updated Sep 9, 2026
  • seedsigner-os Public Forked from SeedSigner/seedsigner-os

    SeedSigner OS built with embit carrying the unified opt-in signature hash. Unofficial, not audited.

    privkeyio/seedsigner-os's past year of commit activity
    Shell 0 MIT 61 0 0 Updated Sep 8, 2026
  • bitcoin Public Forked from bitcoinknots/bitcoin

    Bitcoin Knots enhanced Bitcoin node/wallet software

    privkeyio/bitcoin's past year of commit activity
    C++ 1 MIT 43,222 0 0 Updated Sep 8, 2026
  • lightning Public Forked from ElementsProject/lightning

    Core Lightning — Lightning Network implementation focusing on spec compliance and performance

    privkeyio/lightning's past year of commit activity
    C 4 1,080 0 0 Updated Sep 8, 2026
  • website Public

    Live at privkey.io

    privkeyio/website's past year of commit activity
    CSS 0 MIT 0 2 1 Updated Sep 8, 2026
  • shrike Public Forked from sparrowwallet/sparrow

    Desktop Bitcoin wallet for the BLAKE2b hardfork. Sparrow fork adding unified opt-in sighash support.

    privkeyio/shrike's past year of commit activity
    Java 24 Apache-2.0 343 0 0 Updated Sep 8, 2026
  • lark Public Forked from sparrowwallet/lark

    Bitcoin USB hardware wallet interface library, with the unified opt-in signature hash on the Trezor path. Fork of lark, not audited.

    privkeyio/lark's past year of commit activity
    Java 0 Apache-2.0 11 0 0 Updated Sep 8, 2026
  • drongo Public Forked from sparrowwallet/drongo

    Bitcoin library with BLAKE2b header and unified opt-in sighash support. Fork of drongo.

    privkeyio/drongo's past year of commit activity
    Java 0 Apache-2.0 61 0 1 Updated Sep 8, 2026
  • cc-firmware Public Forked from Coldcard/firmware

    Unofficial Coldcard firmware fork that signs with the unified opt-in signature hash for the Bitcoin hardfork. Not audited, not affiliated with Coinkite.

    privkeyio/cc-firmware's past year of commit activity
    Python 1 239 0 0 Updated Sep 8, 2026
  • shrike-website Public
    privkeyio/shrike-website's past year of commit activity
    HTML 0 MIT 0 0 0 Updated Sep 8, 2026
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