# 0.24.0 - 2020-09-10

- [Remove](https://github.com/rust-bitcoin/rust-bitcoin/pull/385) the `BitcoinHash` trait
- [Introduce `SigHashCache` structure](https://github.com/rust-bitcoin/rust-bitcoin/pull/390) to replace `SighashComponents` and support all sighash modes
- [Add](https://github.com/rust-bitcoin/rust-bitcoin/pull/416) `Transaction::get_size` method
- [Export](https://github.com/rust-bitcoin/rust-bitcoin/pull/412) `util::amount::Denomination`
- [Add](https://github.com/rust-bitcoin/rust-bitcoin/pull/417) `Block::get_size` and `Block::get_weight` methods
- [Add](https://github.com/rust-bitcoin/rust-bitcoin/pull/415) `MerkleBlock::from_header_txids`
- [Add](https://github.com/rust-bitcoin/rust-bitcoin/pull/429) `BlockHeader::u256_from_compact_target`
- [Add](https://github.com/rust-bitcoin/rust-bitcoin/pull/448) `feefilter` network message
- [Cleanup/replace](https://github.com/rust-bitcoin/rust-bitcoin/pull/397) `Script::Instructions` iterator API
- [Disallow uncompressed pubkeys in witness address generation](https://github.com/rust-bitcoin/rust-bitcoin/pull/428)
- [Deprecate](https://github.com/rust-bitcoin/rust-bitcoin/pull/451) `util::contracthash` module
- [Add](https://github.com/rust-bitcoin/rust-bitcoin/pull/435) modulo division operation for `Uint128` and `Uint256`
- [Add](https://github.com/rust-bitcoin/rust-bitcoin/pull/436) `slice_to_u64_be` endian conversion method

# 0.23.0 - 2020-01-07

- Update `secp256k1` dependency to `0.17.1`.
- Update `bitcoinconsensus` dependency to `0.19.0-1`.
- Update `bech32` dependency to `0.7.2`.

# 0.22.0 - 2020-01-07

- Add `ServiceFlags` type.
- Add `NetworkMessage::command`.
- Add `key::Error`.
- Add newtypes for specific hashes:
    - `Txid`
    - `Wtxid`
    - `BlockHash`
    - `SigHash`
    - `PubkeyHash`
    - `ScriptHash`
    - `WPubkeyHash`
    - `WScriptHash`
    - `TxMerkleNode`
    - `WitnessMerkleNode`
    - `WitnessCommitment`
    - `XpubIdentifier`
    - `FilterHash`
- Refactor `CommandString`.
- Refactor `Reject` message.
- Rename `RejectReason` enum variants.
- Refactor `encode::Error`.
- Implement `Default` for `TxIn`.
- Implement `std::hash::Hash` for `Inventory`.
- Implement `Copy` for `InvType` enum.
- Use `psbt::Error` in `PartiallySignedTransaction::from_unsigned_tx`.
- Drop message decode max length to 4_000_000.
- Drop `hex` and `byteorder` dependencies.

# 0.21.0 - 2019-10-02

* Add [serde to `BlockHeader` and `Block`](https://github.com/rust-bitcoin/rust-bitcoin/pull/321)
* [Clean up `StreamReader` API](https://github.com/rust-bitcoin/rust-bitcoin/pull/318) (breaking change)
* Add [reject message](https://github.com/rust-bitcoin/rust-bitcoin/pull/323) to p2p messages

# 0.20.0 - 2019-08-23

* Update `secp256k1` 0.15 and `bitcoinconsensus` 0.17

# 0.19.0 - 2019-08-16

* Add `Amount` and `SignedAmount` types.
* Add BIP-158 support with `BlockFilter` and related types.
* Add `util::misc::signed_msg_hash()` for signing messages.
* Add `MerkleBlock` and `PartialMerkleTree` types.
* bip32: Support serde serializaton for types and add some utility methods:
    * `ChildNumber::increment`
    * `DerivationPath::children_from`
    * `DerivationPath::normal_children`
    * `DerivationPath::hardened_children`
* Add `blockdata::script::Builder::push_verify` to verify-ify an opcode.
* Add `sendheaders` network message.
* Add `OutPoint::new()` method and JSON-serialize as `<txid>:<vout>`.
* Refactor `Address` type:
    * Now supports segwit addresses with version >0.
    * Add `Address::from_script` constructor.
    * Add `Address::address_type` inspector.
    * Parsing now returns an `address::Error` instead of `encode::Error`.
    * Removed `bitcoin_bech32` dependency for bech32 payloads.
* bip143: Rename `witness_script` to `script_code`
* Rename `BlockHeader::spv_validate` to `validate_pow`
* Rename `OP_NOP2` and `OP_NOP3` to `OP_CLTV` and `OP_CSV`
* psbt: Use `BTreeMap` instead of `HashMap` to ensure serialization roundtrips.
* Drop `Decimal` type.
* Drop `LoneHeaders` type.
* Replace `strason` dependency with (optional) `serde_json`.
* Export the `bitcoin_hashes` and `secp256k1` dependent crates.
* Updated `bitcoin_hashes` dependency to v0.7.
* Removed `rand` and `serde_test` dependencies.
* Internal improvements to consensus encoding logic.

# 0.18.0 - 2019-03-21

* Update `bitcoin-bech32` version to 0.9
* add `to_bytes` method for `util::key` types
* add serde impls for `util::key` types
* contracthash: minor cleanups, use `util::key` types instead of `secp256k1` types

# 0.17.1 - 2019-03-04

* Add some trait impls to `PublicKey` for miniscript interoperability

# 0.17.0 - 2019-02-28 - ``The PSBT Release''

* **Update minimum rustc version to 1.22**.
* [Replace `rust-crypto` with `bitcoin_hashes`; refactor hash types](https://github.com/rust-bitcoin/rust-bitcoin/pull/215)
* [Remove `Address::p2pk`](https://github.com/rust-bitcoin/rust-bitcoin/pull/222/)
* Remove misleading blanket `MerkleRoot` implementation; [it is now only defined for `Block`](https://github.com/rust-bitcoin/rust-bitcoin/pull/218)
* [Add BIP157](https://github.com/rust-bitcoin/rust-bitcoin/pull/215) (client-side block filtering messages)
* Allow network messages [to be deserialized even across multiple packets](https://github.com/rust-bitcoin/rust-bitcoin/pull/231)
* [Replace all key types](https://github.com/rust-bitcoin/rust-bitcoin/pull/183) to better match abstractions needed for PSBT
* [Clean up BIP32](https://github.com/rust-bitcoin/rust-bitcoin/pull/233) in preparation for PSBT; [use new native key types rather than `secp256k1` ones](https://github.com/rust-bitcoin/rust-bitcoin/pull/238/)
* Remove [apparently-used `Option` serialization](https://github.com/rust-bitcoin/rust-bitcoin/pull/236#event-2158116421) code
* Finally merge [PSBT](https://github.com/rust-bitcoin/rust-bitcoin/pull/103) after nearly nine months

# 0.16.0 - 2019-01-15

* Reorganize opcode types to eliminate unsafe code
* Un-expose some macros that were unintentionally exported
* Update rust-secp256k1 dependency to 0.12
* Remove `util::iter::Pair` type which does not belong in this library
* Minor bugfixes and optimizations

# 0.15.1 - 2018-11-08

* [Detect p2pk addresses with compressed keys](https://github.com/rust-bitcoin/rust-bitcoin/pull/189)

# 0.15.0 - 2018-11-03

* [Significant API overhaul](https://github.com/rust-bitcoin/rust-bitcoin/pull/156):
    * Remove `nu_select` macro and low-level networking support
    * Move `network::consensus_params` to `consensus::params`
    * Move many other things into `consensus::params`
    * Move `BitcoinHash` from `network::serialize` to `util::hash`; remove impl for `Vec<u8>`
    * Rename/restructure error types
    * Rename `Consensus{De,En}coder` to `consensus::{De,En}coder`
    * Replace `Raw{De,En}coder` with blanket impls of `consensus::{De,En}coder` on `io::Read` and `io::Write`
    * make `serialize` and `serialize_hex` infallible
* Make 0-input transaction de/serialization [always use segwit](https://github.com/rust-bitcoin/rust-bitcoin/pull/153)
* Implement `FromStr` and `Display` for many more types

# 0.14.2 - 2018-09-11

* Add serde support for `Address`

# 0.14.1 - 2018-08-28

* Reject non-compact `VarInt`s on various types
* Expose many types at the top level of the crate
* Add `Ord`, `PartialOrd` impls for `Script`

# 0.14.0 - 2018-08-22

* Add [regtest network](https://github.com/rust-bitcoin/rust-bitcoin/pull/84) to `Network` enum
* Add [`Script::is_op_return()`](https://github.com/rust-bitcoin/rust-bitcoin/pull/101/) which is more specific than
  `Script::is_provably_unspendable()`
* Update to bech32 0.8.0; [add Regtest bech32 address support](https://github.com/rust-bitcoin/rust-bitcoin/pull/110)
* [Replace rustc-serialize dependency with hex](https://github.com/rust-bitcoin/rust-bitcoin/pull/107) as a stopgap
  toward eliminating any extra dependencies for this; clean up the many independent hex encoders and decoders
  throughout the codebase.
* [Add conversions between `ChildNumber` and `u32`](https://github.com/rust-bitcoin/rust-bitcoin/pull/126); make
  representation non-public; fix documentation
* [Add several derivation convenience](https://github.com/rust-bitcoin/rust-bitcoin/pull/129) to `bip32` extended keys
* Make `deserialize::deserialize()` [enforce no trailing bytes](https://github.com/rust-bitcoin/rust-bitcoin/pull/129)
* Replace `TxOutRef` with `OutPoint`; use it in `TxIn` struct.
* Use modern `as_` `to_` `into_` conventions for array-wrapping types; impl `Display` rather than `ToString` for most types
* Change `script::Instructions` iterator [to allow rejecting non-minimal pushes](https://github.com/rust-bitcoin/rust-bitcoin/pull/136);
  fix bug where errors would iterate forever.
* Overhaul `util::Error`; introduce `serialize::Error` [and use it for `SimpleDecoder` and `SimpleDecoder` rather
  than parameterizing these over their error type](https://github.com/rust-bitcoin/rust-bitcoin/pull/137).
* Overhaul `UDecimal` and `Decimal` serialization and parsing [and fix many lingering parsing bugs](https://github.com/rust-bitcoin/rust-bitcoin/pull/142)
* [Update to serde 1.0 and strason 0.4](https://github.com/rust-bitcoin/rust-bitcoin/pull/125)
* Update to secp256k1 0.11.0
* Many, many documentation and test improvements.

# 0.13.1

* Add `Display` trait to uints, `FromStr` trait to `Network` enum
* Add witness inv types to inv enum, constants for Bitcoin regtest network, `is_coin_base` accessor for tx inputs
* Expose `merkleroot(Vec<Sha256dHash>)`

# 0.13

* Move witnesses inside the `TxIn` structure
* Add `Transaction::get_weight()`
* Update bip143 `sighash_all` API to be more ergonomic

# 0.12

* The in-memory blockchain was moved into a dedicated project rust-bitcoin-chain.
* Removed old script interpreter
* A new optional feature "bitcoinconsensus" lets this library use Bitcoin Core's native
script verifier, wrappend into Rust by the rust-bitcoinconsenus project.
See `Transaction::verify` and `Script::verify` methods.
* Replaced Base58 traits with `encode_slice`, `check_encode_slice`, from and `from_check` functions in the base58 module.
* Un-reversed the Debug output for Sha256dHash
* Add bech32 support
* Support segwit address types

### 0.11

* Remove `num` dependency at Matt's request; agree this is obnoxious to require all
downstream users to also have a `num` dependency just so they can use `Uint256::from_u64`.