web3-proxy/web3_proxy/src/rpcs/provider.rs
2022-09-14 02:11:48 +00:00

56 lines
2.0 KiB
Rust

use anyhow::Context;
use derive_more::From;
use std::time::Duration;
use tracing::{info_span, instrument, Instrument};
/// Use HTTP and WS providers.
// TODO: instead of an enum, I tried to use Box<dyn Provider>, but hit <https://github.com/gakonst/ethers-rs/issues/592>
#[derive(From)]
pub enum Web3Provider {
Http(ethers::providers::Provider<ethers::providers::Http>),
Ws(ethers::providers::Provider<ethers::providers::Ws>),
}
impl Web3Provider {
pub fn ready(&self) -> bool {
// TODO: i'm not sure if this is enough
match self {
Self::Http(_) => true,
Self::Ws(provider) => provider.as_ref().ready(),
}
}
#[instrument]
pub async fn from_str(
url_str: &str,
http_client: Option<reqwest::Client>,
) -> anyhow::Result<Self> {
let provider = if url_str.starts_with("http") {
let url: url::Url = url_str.parse()?;
let http_client = http_client.context("no http_client")?;
let provider = ethers::providers::Http::new_with_client(url, http_client);
// TODO: dry this up (needs https://github.com/gakonst/ethers-rs/issues/592)
// TODO: i don't think this interval matters for our uses, but we should probably set it to like `block time / 2`
ethers::providers::Provider::new(provider)
.interval(Duration::from_secs(13))
.into()
} else if url_str.starts_with("ws") {
// TODO: i dont think this instrument does much of anything. what level should it be?
let provider = ethers::providers::Ws::connect(url_str)
.instrument(info_span!("Web3Provider", %url_str))
.await?;
// TODO: dry this up (needs https://github.com/gakonst/ethers-rs/issues/592)
// TODO: i don't think this interval matters
ethers::providers::Provider::new(provider).into()
} else {
return Err(anyhow::anyhow!("only http and ws servers are supported"));
};
Ok(provider)
}
}