49 lines
1.4 KiB
Markdown
49 lines
1.4 KiB
Markdown
# Ethereum types, cryptography and utilities.
|
|
|
|
It is recommended to use the `utils`, `types` and `abi` re-exports instead of
|
|
the `core` module to simplify your imports.\_
|
|
|
|
This library provides type definitions for Ethereum's main datatypes along with
|
|
other utilities for interacting with the Ethereum ecosystem
|
|
|
|
## Signing an ethereum-prefixed message
|
|
|
|
Signing in Ethereum is done by first prefixing the message with
|
|
`"\x19Ethereum Signed Message:\n" + message.length`, and then signing the hash
|
|
of the result.
|
|
|
|
```rust,ignore
|
|
# async fn foo() -> Result<(), Box<dyn std::error::Error>> {
|
|
use ethers::signers::{Signer, LocalWallet};
|
|
|
|
let message = "Some data";
|
|
let wallet = LocalWallet::new(&mut rand::thread_rng());
|
|
|
|
// Sign the message
|
|
let signature = wallet.sign_message(message).await?;
|
|
|
|
// Recover the signer from the message
|
|
let recovered = signature.recover(message)?;
|
|
|
|
assert_eq!(recovered, wallet.address());
|
|
# Ok(())
|
|
# }
|
|
```
|
|
|
|
## Utilities
|
|
|
|
The crate provides utilities for launching local Ethereum testnets by using
|
|
`ganache-cli` via the `GanacheBuilder` struct.
|
|
|
|
# Features
|
|
|
|
- - ["eip712"] | Provides Eip712 trait for EIP-712 encoding of typed data for
|
|
derived structs
|
|
|
|
# ABI Encoding and Decoding
|
|
|
|
This crate re-exports the [`ethabi`](https://docs.rs/ethabi) crate's functions
|
|
under the `abi` module, as well as the
|
|
[`secp256k1`](https://docs.rs/libsecp256k1) and [`rand`](https://docs.rs/rand)
|
|
crates for convenience.
|