197 lines
7.3 KiB
Markdown
197 lines
7.3 KiB
Markdown
# <h1 align="center"> ethers.rs </h1>
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**Complete Ethereum and Celo wallet implementation and utilities in Rust**
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[](https://t.me/ethers_rs)
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[![Crates.io][crates-badge]][crates-url]
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[crates-badge]: https://img.shields.io/crates/v/ethers.svg
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[crates-url]: https://crates.io/crates/ethers
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## Documentation
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Extensive documentation and examples are available [here](https://docs.rs/ethers).
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Alternatively, you may clone the repository and run `cd ethers/ && cargo doc --open`
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You can also run any of the examples by executing: `cargo run -p ethers --example <name>`
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## Add ethers-rs to your repository
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```toml
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[dependencies]
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ethers = "1.0.0"
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```
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</details>
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## Running the tests
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Tests require the following installed:
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1. [`solc`](https://solidity.readthedocs.io/en/latest/installing-solidity.html) (>=0.8.10). We also recommend using [solc-select](https://github.com/crytic/solc-select) for more flexibility.
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2. [`anvil`](https://github.com/foundry-rs/foundry/blob/master/anvil/README.md)
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3. [`geth`](https://github.com/ethereum/go-ethereum)
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In addition, it is recommended that you set the `ETHERSCAN_API_KEY` environment variable
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for [the abigen via Etherscan](https://github.com/gakonst/ethers-rs/blob/master/ethers-contract/tests/abigen.rs) tests.
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You can get one [here](https://etherscan.io/apis).
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### EVM-compatible chains support
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There are many chains live which are Ethereum JSON-RPC & EVM compatible, but do not yet have
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support for [EIP-2718](https://eips.ethereum.org/EIPS/eip-2718) Typed Transactions. This means
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that transactions submitted to them by default in ethers-rs will have invalid serialization. To
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address that, you must use the `legacy` feature flag:
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```toml
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[dependencies]
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ethers = { version = "1.0.0", features = ["legacy"] }
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```
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### Polygon support
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There is abigen support for Polygon and the Mumbai test network. It is recommended that you set the `POLYGONSCAN_API_KEY` environment variable.
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You can get one [here](https://polygonscan.io/apis).
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### Avalanche support
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There is abigen support for Avalanche and the Fuji test network. It is recommended that you set the `SNOWTRACE_API_KEY` environment variable.
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You can get one [here](https://snowtrace.io/apis).
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### Celo Support
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[Celo](http://celo.org/) support is turned on via the feature-flag `celo`:
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```toml
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[dependencies]
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ethers = { version = "1.0.0", features = ["celo"] }
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```
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Celo's transactions differ from Ethereum transactions by including 3 new fields:
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- `fee_currency`: The currency fees are paid in (None for CELO, otherwise it's an Address)
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- `gateway_fee_recipient`: The address of the fee recipient (None for no gateway fee paid)
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- `gateway_fee`: Gateway fee amount (None for no gateway fee paid)
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The feature flag enables these additional fields in the transaction request builders and
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in the transactions which are fetched over JSON-RPC.
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## Features
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- [x] Ethereum JSON-RPC Client
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- [x] Interacting and deploying smart contracts
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- [x] Type safe smart contract bindings code generation
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- [x] Querying past events
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- [x] Event monitoring as `Stream`s
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- [x] ENS as a first class citizen
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- [x] Celo support
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- [x] Polygon support
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- [x] Avalanche support
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- [x] Websockets / `eth_subscribe`
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- [x] Hardware Wallet Support
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- [x] Parity APIs (`tracing`, `parity_blockWithReceipts`)
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- [x] Geth TxPool API
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- [ ] WASM Bindings (see note)
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- [ ] FFI Bindings (see note)
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- [ ] CLI for common operations
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### Websockets
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Websockets support is turned on via the feature-flag `ws`:
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```toml
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[dependencies]
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ethers = { version = "1.0.0", features = ["ws"] }
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```
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### Interprocess Communication (IPC)
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IPC support is turned on via the feature-flag `ipc`:
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```toml
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[dependencies]
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ethers = { version = "1.0.0", features = ["ipc"] }
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```
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### HTTP Secure (HTTPS)
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If you are looking to connect to a HTTPS endpoint, then you need to enable the `rustls` or `openssl` feature.
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feature-flags.
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To enable `rustls`:
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```toml
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[dependencies]
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ethers = { version = "1.0.0", features = ["rustls"] }
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```
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To enable `openssl`:
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```toml
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[dependencies]
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ethers = { version = "1.0.0", features = ["openssl"] }
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```
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## Note on WASM and FFI bindings
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You should be able to build a wasm app that uses ethers-rs (see the [example](./examples/ethers-wasm) for reference). If ethers fails to
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compile in WASM, please
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[open an issue](https://github.com/gakonst/ethers-rs/issues/new/choose).
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There is currently no plan to provide an official JS/TS-accessible library
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interface. we believe [ethers.js](https://docs.ethers.io/v5/) serves that need
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very well.
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Similarly, you should be able to build FFI bindings to ethers-rs. If ethers
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fails to compile in c lib formats, please
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[open an issue](https://github.com/gakonst/ethers-rs/issues/new/choose).
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There is currently no plan to provide official FFI bindings, and as ethers-rs is
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not yet stable 1.0.0, its interface may change significantly between versions.
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## Getting Help
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First, see if the answer to your question can be found in the [API documentation](https://docs.rs/ethers). If the answer
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is not there, try opening an [issue](https://github.com/gakonst/ethers-rs/issues/new) with the question.
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Join the [ethers-rs telegram](https://t.me/ethers_rs) to chat with the community!
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## Contributing
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Thanks for your help improving the project! We are so happy to have you! We have
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[a contributing guide](https://github.com/gakonst/ethers-rs/blob/master/CONTRIBUTING.md) to
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help you get involved in the ethers-rs project.
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If you make a Pull Request, do not forget to add your changes in the [CHANGELOG](CHANGELOG.md) and ensure your code is
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properly formatted with `cargo +nightly fmt` and clippy is happy `cargo clippy`, you can even try to let clippy fix simple
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issues itself: `cargo +nightly clippy --fix -Z unstable-options`
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## Related Projects
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This library would not have been possible without the great work done in:
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- [`ethers.js`](https://github.com/ethers-io/ethers.js/)
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- [`rust-web3`](https://github.com/tomusdrw/rust-web3/)
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- [`ethcontract-rs`](https://github.com/gnosis/ethcontract-rs/)
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- [`guac_rs`](https://github.com/althea-net/guac_rs/tree/master/web3/src/jsonrpc)
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A lot of the code was inspired and adapted from them, to a unified and opinionated interface,
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built with async/await and std futures from the ground up.
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## Projects using ethers-rs
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- [Yield Liquidator](https://github.com/yieldprotocol/yield-liquidator/): Liquidator for Yield Protocol
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- [MEV Inspect](https://github.com/flashbots/mev-inspect-rs/): Miner Extractable Value inspector
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- [Ethers Flashbots](https://github.com/onbjerg/ethers-flashbots): Ethers middleware for [Flashbots](https://docs.flashbots.net)
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- [Ethers Fireblocks](https://github.com/gakonst/ethers-fireblocks): Ethers middleware and signer for [Fireblocks](https://fireblocks.io)' API
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- [Celo Threshold BLS DKG](https://github.com/celo-org/celo-threshold-bls-rs/): CLI for using Celo as a data availability network for the Joint-Feldman BLS DKG
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- [Celo Plumo Prover](https://github.com/celo-org/plumo-prover): Creates Celo's ultralight client proof from on-chain data
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- [Celo SNARK Setup Coordinator](https://github.com/celo-org/snark-setup-operator): Coordinator for executing a pipelined Groth16 SNARK setup
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