36 lines
1.3 KiB
Rust
36 lines
1.3 KiB
Rust
use ethers::prelude::*;
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use reqwest::Url;
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use std::time::Duration;
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const RPC_URL: &str = "https://mainnet.infura.io/v3/c60b0bb42f8a4c6481ecd229eddaca27";
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/// The RetryClient is a type that wraps around a JsonRpcClient and automatically retries failed
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/// requests using an exponential backoff and filtering based on a RetryPolicy. It presents as a
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/// JsonRpcClient, but with additional functionality for retrying requests.
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///
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/// The RetryPolicy can be customized for specific applications and endpoints, mainly to handle
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/// rate-limiting errors. In addition to the RetryPolicy, errors caused by connectivity issues such
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/// as timed out connections or responses in the 5xx range can also be retried separately.
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#[tokio::main]
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async fn main() -> eyre::Result<()> {
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let provider = Http::new(Url::parse(RPC_URL)?);
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let client = RetryClientBuilder::default()
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.rate_limit_retries(10)
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.timeout_retries(3)
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.initial_backoff(Duration::from_millis(500))
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.build(provider, Box::new(HttpRateLimitRetryPolicy::default()));
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// Send a JSON-RPC request for the latest block
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let block_num = "latest".to_string();
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let txn_details = false;
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let params = (block_num, txn_details);
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let block: Block<H256> =
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JsonRpcClient::request(&client, "eth_getBlockByNumber", params).await?;
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println!("{block:?}");
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Ok(())
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}
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