bsv-ruby-sdk

A comprehensive Ruby SDK for the BSV Blockchain, built with faithful adherence to the BRC specifications and cross-SDK compatibility with the official TypeScript, Go, and Pythonimplementations. The Ruby SDK strives to be a complete, correct, and well-tested implementation that serves the Ruby community — one that developers can rely on as a reference-quality foundation for BSV application development.

The project is grounded in the principles that make Ruby and Rails productive: convention over configuration, sensible defaults, and the principle of least surprise. Every component ships with a sane default that works out of the box, while exposing a pluggable composition interface for teams that need more.

Cryptographic Primitives — ECDSA signing with RFC 6979 deterministic nonces, Schnorr signatures, ECIES encryption/decryption, Bitcoin Signed Messages. Elliptic curve operations are provided by the secp256k1-native gem — a pure Ruby secp256k1 implementation with an optional C extension (~22× speedup).

• Key Management — BIP-32 HD key derivation, BIP-39 mnemonic generation (12/24-word phrases), WIF import/export, Base58Check encoding/decoding.

• Script Layer — Complete opcode set, script parsing and serialisation, type detection and predicates (p2pkh?, p2pk?, p2sh?, multisig?, op_return?), data extraction (pubkey hashes, script hashes, addresses), and a fluent builder API.

• Script Templates — Ready-made locking and unlocking script generators for P2PKH, P2PK, P2MS (multisig), and OP_RETURN.

• Transaction Construction — Input/output building, BIP-143 sighash computation (all SIGHASH types with FORKID), P2PKH signing, fee estimation.

• SPV Structures — Merkle path construction and verification, BEEF (Background Evaluation Extended Format) serialisation and deserialisation.

• Network Integration — ARC broadcaster for transaction submission, WhatsOnChain chain provider for UTXO queries and fee rates.

• ProtoWallet — Minimal BRC-100 cryptographic wallet for signing, encryption, HMAC, and key derivation. Full wallet functionality is provided by the standalone bsv-wallet gem.