Skill Store 33

Bitcoin Libraries Libwally

libwally-core: Blockstream's C library for wallet primitives.

by claude-dev-suite · MIT

The skill

libwally-core: Blockstream's C library for wallet primitives. BIP32/39, PSBT, Liquid Confidential Transactions, BIP143, Schnorr. Bindings to Python, JS, Java, Swift. USE WHEN: building cross-language wallets via libwally bindings, integrating Liquid CT.

libwally-core

Blockstream's C library focused on wallet primitives (vs full node code).

Repo: github.com/ElementsProject/libwally-core.

Features

  • BIP32 HD derivation.
  • BIP39 mnemonic.
  • BIP38 password-encrypted private keys.
  • PSBT (BIP174).
  • Bitcoin Tx serialization.
  • Liquid Confidential Transactions.
  • Schnorr (BIP340).
  • BIP85.

Bindings

  • Python: wallycore.
  • JavaScript: libwally-core-js (WebAssembly).
  • Java: wally-android, wally-jvm.
  • Swift: native bindings for iOS.
  • C (native).

Quick example (Python)

import wallycore as wally

seed = wally.bip39_mnemonic_to_seed512("abandon abandon ... about", "")
master = wally.bip32_key_from_seed(seed, wally.BIP32_VER_MAIN_PRIVATE)
account = wally.bip32_key_from_parent_path(master,
    [84 + 0x80000000, 0 + 0x80000000, 0 + 0x80000000])
xpub = wally.bip32_key_to_base58(account, wally.BIP32_FLAG_KEY_PUBLIC)

Use cases

  • Blockstream Green Wallet (uses libwally extensively).
  • Cross-platform wallet libraries (one C core, many bindings).
  • Liquid integrations.

Compared

Aspect libwally rust-bitcoin bitcoinj
Language C (with bindings) Rust Java
Liquid CT Yes No No
HW wallet No No No
Performance Best (C) Best Acceptable

Common pitfalls

  • C API is stateful; clean up with wally_*_free functions.
  • Build with --enable-elements for Liquid CT support.
  • Bindings sometimes lag C library version.

See also

Use this skill

Connect your agent to the Skill Store MCP server and ask for it by ref: claude-dev-suite/bitcoin-libraries-libwally-37387554502.

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Details

Publisher
claude-dev-suite
Category
Software Development › Misc
License
MIT
Updated
2026-10-19

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