Gas Oracles (ethers-rs)

gasOracles.rs

use ethers::prelude::*;
use eyre::Result;
use gas_oracle::{
    EthGasStation, Etherchain, Etherscan,
    GasCategory::{Fast, Fastest, SafeLow, Standard},
    GasOracle,
};

#[tokio::main]
async fn main() -> Result<()> {
    let url = std::env::var("ETHEREUM_INFURA_HTTPS_ENDPOINT")?;
    let client = Provider::<Http>::try_from(url)?;
    let etherscan_key = std::env::var("ETHERSCAN_KEY")?;

    let eth_estimate_gas = client.get_gas_price().await?;
    println!("eth_estimateGas: {}", eth_estimate_gas);
    println!("Compared to EthGasStation / Etherscan / Etherchain");

    for category in [Fastest, Fast, Standard, SafeLow] {
        let eth_gas_station_oracle = EthGasStation::new(None).category(category);
        let etherscan_oracle =
            Etherscan::new(Client::new(Chain::Mainnet, &etherscan_key)?).category(category);
        let etherchain_oracle = Etherchain::new().category(category);

        let gas_station_gas_price = eth_gas_station_oracle.fetch().await?;
        let etherscan_gas_price = etherscan_oracle.fetch().await.unwrap_or_default();
        let etherchain_gas_price = etherchain_oracle.fetch().await?;
        println!(
            "Category ({:?}): {} {} {}",
            category, gas_station_gas_price, etherscan_gas_price, etherchain_gas_price
        );
    }

    Ok(())
}

// prints:
// eth_estimateGas: 18325612325
// Compared to EthGasStation / Etherscan / Etherchain
// Category (Fastest): 39000000000 0 2000000000
// Category (Fast): 37000000000 19000000000 1000000000
// Category (Standard): 30000000000 18000000000 1000000000
// Category (SafeLow): 27000000000 18000000000 1000000000
// also see https://twitter.com/samlafer/status/1528723169162342400