scure-btc-signer

Independently audited by Cure53, with PGP-signed releases and transparent builds, ensuring high trustworthiness for security-critical applications.

Handles all major Bitcoin transaction types from classic P2PK to modern Taproot (P2TR), including Schnorr signatures and multi-signature scripts, as detailed in the payments section.

Implements BIP174 PSBT for partial signing workflows and BIP327 MuSig2 for secure multi-party signing, facilitating complex wallet operations without network dependencies.

Zero dependencies, 39KB gzipped size, and runs on Node.js, Deno, and React Native with a polyfill, making it easy to audit and deploy across platforms.