105 lines
3.8 KiB
Markdown
105 lines
3.8 KiB
Markdown
[](https://travis-ci.org/rust-bitcoin/rust-bitcoin)
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# Rust Bitcoin Library
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Library with support for de/serialization, parsing and executing on data
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structures and network messages related to Bitcoin and other blockchain-based
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currencies.
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[Documentation](https://docs.rs/bitcoin/)
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Supports (or should support)
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* De/serialization of Bitcoin protocol network messages
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* De/serialization of blocks and transactions
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* Script de/serialization
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* Private keys and address creation, de/serialization and validation (including full BIP32 support)
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* Pay-to-contract support as in Appendix A of the [Blockstream sidechains whitepaper](https://www.blockstream.com/sidechains.pdf)
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For JSONRPC interaction with Bitcoin Core, it is recommended to use [rust-jsonrpc](https://github.com/apoelstra/rust-jsonrpc)
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which uses the underlying [strason library](https://github.com/apoelstra/strason)
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which parses decimal numbers as strings, preventing precision errors.
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# Known limitations
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## Consensus
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This library **must not** be used for consensus code (i.e. fully validating
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blockchain data). It technically supports doing this, but doing so is very
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ill-advised because there are many deviations, known and unknown, between
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this library and the Bitcoin Core reference implementation. In a consensus
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based cryptocurrency such as Bitcoin it is critical that all parties are
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using the same rules to validate data, and this library is simply unable
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to implement the same rules as Core.
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Given the complexity of both C++ and Rust, it is unlikely that this will
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ever be fixed, and there are no plans to do so. Of course, patches to
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fix specific consensus incompatibilities are welcome.
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## Documentation
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Currently the [documentation](https://www.wpsoftware.net/rustdoc/bitcoin/)
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is very sparse. Patches to add usage examples and to expand on existing
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docs would be extremely appreciated.
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# Policy on Altcoins/Altchains
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Patches which add support for non-Bitcoin cryptocurrencies by adding constants
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to existing enums (e.g. to set the network message magic-byte sequence) are
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welcome. Anything more involved will be considered on a case-by-case basis,
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as the altcoin landscape includes projects which [frequently appear and
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disappear, and are poorly designed anyway](https://download.wpsoftware.net/bitcoin/alts.pdf)
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and keeping the codebase maintainable is a large priority.
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In general, things that improve cross-chain compatibility (e.g. support for
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cross-chain atomic swaps) are more likely to be accepted than things which
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support only a single blockchain.
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## Release Notes
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I will try to document all breaking changes here so that people upgrading will know
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what they need to change.
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### 0.11
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Remove `num` dependency at Matt's request; agree this is obnoxious to require all
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downstream users to also have a `num` dependency just so they can use `Uint256::from_u64`.
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### 0.12
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* The in-memory blockchain was moved into a dedicated project rust-bitcoin-chain.
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* Removed old script interpreter
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* A new optional feature "bitcoinconsenus" lets this library use Bitcoin Core's native
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script verifier, wrappend into Rust by the rust-bitcoinconsenus project.
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See `Transaction::verify` and `Script::verify` methods.
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* Replaced Base58 traits with `encode_slice`, `check_encode_slice`, from and `from_check` functions in the base58 module.
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* Un-reversed the Debug output for Sha256dHash
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* Add bech32 support
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* Support segwit address types
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### 0.13
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* Move witnesses inside the `TxIn` structure
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* Add `Transaction::get_weight()`
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* Update bip143 `sighash_all` API to be more ergonomic
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#### 0.13.1
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* Add `Display` trait to uints, `FromStr` trait to `Network` enum
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* Add witness inv types to inv enum, constants for Bitcoin regtest network, `is_coin_base` accessor for tx inputs
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* Expose `merkleroot(Vec<Sha256dHash>)`
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