68 lines
1.9 KiB
Markdown
68 lines
1.9 KiB
Markdown
# Clients for interacting with Ethereum nodes
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This crate provides asynchronous
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[Ethereum JSON-RPC](https://github.com/ethereum/wiki/wiki/JSON-RPC) compliant
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clients.
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For more documentation on the available calls, refer to the
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[`Provider`](./struct.Provider.html) struct.
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# Examples
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```no_run
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use ethers_providers::{Provider, Http, Middleware};
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use std::convert::TryFrom;
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# async fn foo() -> Result<(), Box<dyn std::error::Error>> {
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let provider = Provider::<Http>::try_from(
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"https://mainnet.infura.io/v3/c60b0bb42f8a4c6481ecd229eddaca27"
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)?;
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let block = provider.get_block(100u64).await?;
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println!("Got block: {}", serde_json::to_string(&block)?);
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let code = provider.get_code("0x89d24a6b4ccb1b6faa2625fe562bdd9a23260359", None).await?;
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println!("Got code: {}", serde_json::to_string(&code)?);
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# Ok(())
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# }
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```
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# Websockets
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The crate has support for WebSockets via Tokio.
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```
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# async fn foo() -> Result<(), Box<dyn std::error::Error>> {
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# use ethers_providers::Ws;
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let ws = Ws::connect("ws://localhost:8545").await?;
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# Ok(())
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# }
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```
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# Ethereum Name Service
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The provider may also be used to resolve
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[Ethereum Name Service](https://ens.domains) (ENS) names to addresses (and vice
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versa). The default ENS address is
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[mainnet](https://etherscan.io/address/0x00000000000C2E074eC69A0dFb2997BA6C7d2e1e)
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and can be overriden by calling the [`ens`](./struct.Provider.html#method.ens)
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method on the provider.
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```no_run
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# use ethers_providers::{Provider, Http, Middleware};
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# use std::convert::TryFrom;
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# async fn foo() -> Result<(), Box<dyn std::error::Error>> {
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# let provider = Provider::<Http>::try_from(
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# "https://mainnet.infura.io/v3/c60b0bb42f8a4c6481ecd229eddaca27"
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# )?;
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// Resolve ENS name to Address
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let name = "vitalik.eth";
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let address = provider.resolve_name(name).await?;
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// Lookup ENS name given Address
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let resolved_name = provider.lookup_address(address).await?;
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assert_eq!(name, resolved_name);
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# Ok(())
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# }
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```
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