bitcoinjs/bitcoinjs-lib
Bitcoinjs Lib
bitcoinjs-lib is a JavaScript library for building Bitcoin transactions, generating addresses, and managing keys in both Node.js and browser environments. It provides a complete Bitcoin development toolkit covering address generation across standard, SegWit, P2SH, and multisig formats for mainnet and testnet networks, along with hierarchical deterministic key derivation following BIP32, BIP39, BIP44, and BIP49 standards.
The library offers a comprehensive transaction engine that handles ECDSA and Schnorr signatures on the secp256k1 curve, supports Partially Signed Bitcoin Transaction (PSBT) format for incremental signing across parties, and includes a script compiler for executing Bitcoin opcodes in P2SH, SegWit, and Taproot spending conditions. It also evaluates absolute and relative time-lock constraints using CLTV and CSV opcodes, and provides a transaction-building pipeline that chains input/output assembly, fee estimation, and signing operations.
For advanced use, bitcoinjs-lib supports Taproot transaction construction with both key-path and script-path spending, multisignature aggregation into redeem scripts or witness programs, and network-agnostic address encoding that switches between base58 and bech32 formats based on network parameters. The library is available as a JavaScript package for integration into web and server-side applications.
Features
- Bitcoin Transaction Signers - Creates, signs, and prepares Bitcoin transactions using P2SH, SegWit, and multisig inputs.
- Schnorr Signing Implementations - Implements both ECDSA and Schnorr signature generation and verification on the secp256k1 curve.
- Bitcoin Key Managers - Derives and exports BIP32, BIP39, BIP44, and BIP49 hierarchical deterministic Bitcoin keys and addresses.
- BIP32 Hierarchical Deterministic Derivations - Derives and exports BIP32, BIP44, BIP49, and BIP39 keys and addresses from extended keys.
- Hierarchical Deterministic Key Derivations - Derives child keys from extended keys using BIP32 path traversal with hardened and non-hardened steps.
- Bitcoin Address Generators - Generates standard, SegWit, P2SH, and multisig Bitcoin addresses for mainnet and testnet networks.
- BIP32 Hierarchical Deterministic Derivations - Derives and exports BIP32, BIP44, BIP49, and BIP39 keys and addresses from extended keys.
- Bitcoin Transaction Pipelines - Constructs transactions by chaining input/output assembly, fee estimation, and signing into a sequential pipeline.
- Partially Signed Bitcoin Transactions - Generates and processes Partially Signed Bitcoin Transactions for collaborative multi-party signing workflows.
- Bitcoin Transaction Builders - Constructs and signs P2SH, SegWit, Taproot, and time-locked Bitcoin transactions programmatically.
- Transaction Signing and Broadcasting - Provides a complete pipeline for building, signing, and broadcasting Bitcoin transactions with P2SH, SegWit, and multisig inputs.
- Bitcoin Address Generators - Generates standard, SegWit, P2SH, and multisig Bitcoin addresses for mainnet and testnet networks.
- Bitcoin Time-Lock Evaluators - Evaluates absolute and relative lock-time constraints using CLTV and CSV opcodes against transaction timestamps.
- Bitcoin Time-Locked Transaction Builders - Constructs Bitcoin transactions with absolute and relative lock-time conditions using CLTV and CSV opcodes.
- Bitcoin Script Compilers - Compiles Bitcoin script opcodes into executable spending conditions for P2SH, SegWit, and Taproot.
- Bitcoin Time-Locked Transaction Builders - Constructs Bitcoin transactions with absolute and relative lock-time conditions using CLTV and CSV opcodes.
- Taproot Transaction Builders - Constructs and signs Taproot transactions using key-path and script-path spending with OPCHECKSIG and OPCHECKSEQUENCEVERIFY.
- Bitcoin Address Encoders - Encodes Bitcoin addresses for mainnet and testnet using base58 and bech32 with network parameter switching.
- Multisignature Script Aggregations - Aggregates multiple public keys into redeem scripts or witness programs for multisig address generation and spending.
- Taproot Transaction Signers - Builds and signs Taproot transactions with key-path and script-path spending conditions.
- JavaScript and TypeScript Libraries - Standard library for Bitcoin transactions and scripting.
- Blockchain - Bitcoin library for Node.js and browsers.
- Distributed Systems - Library for interacting with the Bitcoin protocol.
