v2023.7.12

This is the last release supporting py37.

Major changes include:

• added first draft implementation of descriptors
• added first draft implementation of script engine
• added taproot psbt fields
• improved bip32 derivation (speeded-up, added one more test)
• supported py3.12 with btclib_libsecp256k1
• updated toolchain

v2023.5.30

Major changes include:

• Fix circular import between script and b32

v2023.2.3

Major changes include:

• enabled libsecp256k1 by default
• improved documentation
• used generic containers (Sequence instead of list, Mapping instead of dict) where possible

v2023.1.17

Major changes include:

• exported names per module (bip32, block, ec, ecc, mnemonic, psbt, script, tx)
• added join_psbts and join_txs
• refactored bip340_nonce
• improved integration of libsecp256k1
• added secp256k1-py test vectors
• improved typing
• added SECURITY, CONTRIBUTING, bug report and feature request templates
• added pre-commit hooks
• adopted mypy --strict and from future import annotations

v2022.12.31

Major changes include:

• added support for Python 3.11
• fixed the OpenSSL 3.x RIPEMD160 issue in btclib/hashes.py
• added CONTRIBUTING and SECURITY
• solved issue #73 Re-import Tx subclasses into btclib.tx

v2022.7.20

Major changes include:

• by default ssa, dsa and point multiplication are now sped up using btclib_libsecp256k1;
  this provides an 8 times speed up in benchmarks and 3 times in real world applications.

v2022.5.3

Major changes includes:

• dropped python 3.6 support
• added support for btclib_libsecp256k1
• the hashes.fingerprint function, removed in the previous version,
  has been reinstated in the to_pub_key module
• encode_num and decode_num have been moved from
  script.op_codes to utils
• op_pushdata and op_str have been renamed to
  serialize_bytes_command and serialize_str_command
• script.op_codes has been removed and its functions merged in script
• script serialization is now more consistent: all integers, even small
  ones, are now considered like bytes. To put small integers on the stack
  OP_X must be used explicitly. Using integers directly will lead to larger
  scripts that will be likely to be rejected by the network as not standard
• check_validity is now correctly propagated inside each function

v2022.2.9

This is the latest release to support python 3.6

Major changes includes:

• added bech32m
• added Taproot support
• introduced ScriptPubKey class
• used script_type instead of prefix/wit_ver for b58/b32 address functions
• split up op_int in op_num and op_int
• prevented bip32 account derivation with arbitrarily high index
• ensured der.Sig.r is congruent to a valid x-coordinate
• renamed ScriptToken as Command
• moved witness and script_pub_key into script folder
• removed dataclasses_json dependency
• introduced submodules
• renamed Tx.tx_id as Tx.id
• renamed deserialize as parse
• renamed signature functions: trailing underscore marks hash-reduced versions
• updated BIP32 test vectors
• moved continuous testing from TravisCI to Github Actions
• simplified configuration files
• fixed pylint and flake8 warnings

v2020.12.19

Major changes includes:

• added secp256k1 point multiplication based on efficient endomorphism
• fixed ssa batch verification functions' logic
• enforced snake_case variable naming convention, e.g. 'script_pub_key', etc.
• added BIP32KeyOrigin, BIP32KeyPath, and BIP32KeyPaths
• adopted str instead of bytes as default type for BIP32 keys, bms sigs, PSBTs, addresses, and WIFs; base58 and bech32 encodings keep returning bytes, like base64
• cleaned up and refactored all dataclasses, now using serialize/deserialized and possibly b58encode/b58decode, b64encode/b64decode, etc.
• renamed TxIn.witness as TxIn.script_witness
• fixed Witness management in TxIn and Tx, including equality operator
• consolidated sig_hash code into sig_hash module
• added more script_pub_key functions: assert_p2pkh, is_p2pkh, etc.

v2020.11.23

Major changes includes:

• updated BIP340 (Schnorr signature) implementation as per the latest changes in bitcoin core
• refactored PsbtIn, PsbtOut, and Psbt
• added legacy sighash
• made btclib compatible with python 3.6
• ssa.det_nonce now returns an int
• moved tagged_hash from ssa into hashes module
• added CurveGroup._y_aff_from_jac and removed unused methods
• discontinued y_odd in favor of y_even as y-simmetry tiebreaker criterium
• removed nonce input from dsa.sign and ssa.sign (only available from _sign functions)
• cleaned up Exception handling, avoided bare/broad except
• introduced btclib Exceptions that can be discriminated from regular Exceptions