ethers-rs/ethers-providers
dependabot[bot] 37f3df5234
chore(deps): bump once_cell from 1.11.0 to 1.12.0 (#1306)
Bumps [once_cell](https://github.com/matklad/once_cell) from 1.11.0 to 1.12.0.
- [Release notes](https://github.com/matklad/once_cell/releases)
- [Changelog](https://github.com/matklad/once_cell/blob/master/CHANGELOG.md)
- [Commits](https://github.com/matklad/once_cell/compare/v1.11.0...v1.12.0)

---
updated-dependencies:
- dependency-name: once_cell
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
2022-05-24 00:31:40 -07:00
..
src feat: add paginated logs (#1285) 2022-05-23 14:23:35 -07:00
tests fix(core): check against ethers internal crate names (#1060) 2022-03-17 15:14:53 -07:00
Cargo.toml chore(deps): bump once_cell from 1.11.0 to 1.12.0 (#1306) 2022-05-24 00:31:40 -07:00
README.md chore: fix typo in provider readme 2022-05-02 22:47:42 +03:00

README.md

Clients for interacting with Ethereum nodes

This crate provides asynchronous Ethereum JSON-RPC compliant clients.

For more documentation on the available calls, refer to the Provider struct.

Examples

use ethers_core::types::Address;
use ethers_providers::{Provider, Http, Middleware};
use std::convert::TryFrom;

# async fn foo() -> Result<(), Box<dyn std::error::Error>> {
let provider = Provider::<Http>::try_from(
    "https://mainnet.infura.io/v3/YOUR_API_KEY"
)?;

let block = provider.get_block(100u64).await?;
println!("Got block: {}", serde_json::to_string(&block)?);

let addr = "0x89d24a6b4ccb1b6faa2625fe562bdd9a23260359".parse::<Address>()?;
let code = provider.get_code(addr, None).await?;
println!("Got code: {}", serde_json::to_string(&code)?);
# Ok(())
# }

Websockets

The crate has support for WebSockets via Tokio. Please ensure that you have the "ws" and "rustls" / "openssl" features enabled if you wish to use WebSockets.

# async fn foo() -> Result<(), Box<dyn std::error::Error>> {
# use ethers_providers::Ws;
let ws = Ws::connect("ws://localhost:8545").await?;
# Ok(())
# }

Ethereum Name Service

The provider may also be used to resolve Ethereum Name Service (ENS) names to addresses (and vice versa). The default ENS address is mainnet and can be overriden by calling the ens method on the provider.

# use ethers_providers::{Provider, Http, Middleware};
# use std::convert::TryFrom;
# async fn foo() -> Result<(), Box<dyn std::error::Error>> {
# let provider = Provider::<Http>::try_from(
#     "https://mainnet.infura.io/v3/YOUR_API_KEY"
# )?;
// Resolve ENS name to Address
let name = "vitalik.eth";
let address = provider.resolve_name(name).await?;

// Lookup ENS name given Address
let resolved_name = provider.lookup_address(address).await?;
assert_eq!(name, resolved_name);

/// Lookup ENS field
let url = "https://vitalik.ca".to_string();
let resolved_url = provider.resolve_field(name, "url").await?;
assert_eq!(url, resolved_url);

/// Lookup and resolve ENS avatar
let avatar = "https://ipfs.io/ipfs/QmSP4nq9fnN9dAiCj42ug9Wa79rqmQerZXZch82VqpiH7U/image.gif".to_string();
let resolved_avatar = provider.resolve_avatar(name).await?;
assert_eq!(avatar, resolved_avatar.to_string());
# Ok(())
# }