encode/decode number as bitcoin variable length integer
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bitcoin OP codes
encode/decode value as bitcoin OP_PUSHDATA integer
Bech32 encoding / decoding
Validate any Bitcoin address - P2WSH, P2WPKH, P2SH, P2PKH - Mainnet & Testnet
A Bitcoin wallet Snap.
Fork of bip174 with BitGo specific changes
A pure and powerful JavaScript Bitcoin library.
Bitcoin Cash general purpose address translation.
TypeScript library for Bitcoin apps.
Bitcoin Cash cashaddr address format support for Node.js and web browsers.
A tiny secp256k1 JS
An interface over BIP-32 and BIP-39 key derivation paths

Reactive primitives for Bitcoin apps.
Bitcoin Miniscript, a high-level language for describing Bitcoin spending conditions. It includes a compiler/analyzer with a signer‑agnostic satisfier that derives symbolic witnesses (e.g., <sig(key)>).
A modern Bitcoin Core REST and RPC client.
Client-side Bitcoin-like JavaScript library
Multicoin address validator for Bitcoin and other Altcoins.
ultra-lightweight library for Bitcoin Cash, Bitcoin, and Bitauth
JavaScript implementation of Bitcoin IPLD formats
React primitives for Bitcoin apps.
A tiny secp256k1 JS