General fixes

Added

• Method to check whether two TxIns spend the same output

Fixed

• StackData.__str__ for display in Witnesses
• RBF detection
• CoinBaseTxIn.to_json in case of SegWit coinbases

Backward compatibility

• No public interface breaking

Better timelocks handling, more consistent interface

Added

• TransactionFactory class that can instantiate either a Transaction or a SegWitTransaction from json, hex or bytes
• Address class now have a to_script method that generates the corresponding scriptPubKey
• More high-level interface to Locktime and Sequence classes
• Absolute and relative timelock solvers are now separated and take Locktime/Sequence as input so that the spend method can automatically fill in locktime and sequence numbers in the resulting signed transactions

Fixed

• Deserialization interface inconsistencies (see #42)

Backward compatibility

The following changes can break backward compatibility:

• TimelockScript has been renamed to AbsoluteTimelockScript
• Transaction now fails when trying to unhexlify a SegWitTransaction and vice versa
• BaseAddress has been renamed to Address, Address to ClassicAddress

Python3.3 compatibility

Fixes

Python3.3 compatibility

Strict mode, serialisation fix, pubkey rare prefixes

Added

• Support for 0x06 and 0x07 pubkey prefixes
• Strict mode

Fixed

• StackData serialisation

Backward compatibility

• many methods that previously expected a check_network flag, now expect a strict flag with the same semantics
• some script_pubkeys that were previously recognised as 'nonstandard' will now be recognised as the appropriate type if strict is set to False

Constants segregation and address refactor

Added

• New way to create addresses from scripts
• Many test vectors on SegWit-over-P2SH address generation
• All Bitcoin-related constants have been moved to a separate file for better code readability and easier forking by other coins

Fixed

• Ambiguous semantics between address() and to_address() in scripts

Backward compatibility

• The to_address() method in scripts no longer exists

Bug fixes

Added

• __eq__ methods on Block and Transaction
• Test vectors

Fixed

• Parsing of 00 as a 1-byte push operation
• Parsing of invalid push operations
• TxIn.from_json method now properly instantiates CoinBaseScriptSig where appropriate
• Generic Scripts unhexlify method now works as expected (i.e. no identification is performed on the unhexlifying of Scripts, ScriptPubKeys and ScriptSigs)

Backward compatibility

• Should not break past usage, apart from usage that for some reason relied on the bugs that are now fixed

Bugfix

Fixed

• Parsing of invalid pushdata ops

Native base58 library

Added

• base58 native implementation

Fixed

• Parsing of peculiar multisig scripts

Backward compatibility

• Does not break past functionalities

Efficient parsing

Added

• Parsing of data structures is now way more efficient
• Opcodes have been isolated in a separate file and helper methods have been created to deal with them

Fixed

• Parsing of peculiar scripts no longer crashes (e.g. empy push operations, multisig scripts without public keys)

Backward compatibility

Breaks the following functionality:

• Any code that used the following static fields of the BaseScript class now needs to be refactored to use the opcodes module:
  • opcode_to_int
  • int_to_opcode
  • opcode_to_hex
  • hex_to_opcode

0.2.7

Added

• CouldNotEncode exception in codecs
• force=False option in network setup
• check_network=True in address validity check
• Notion of compressed public key in PrivateKey class
• to_wif() method in PrivateKey
• .json extension to test vectors
• Tests for all new features and fixes

Fixed

• Serialization of OP_1NEGATE
• Address in script to_json()
• Conversion to address in P2wshV0Script

Backwards compatibility

Some conversions from private key to public key might change as now PrivateKey remembers if it was created from a WIF format that demanded the generation of a compressed public key.