66 lines
2.2 KiB
Rust
66 lines
2.2 KiB
Rust
use anyhow::Context;
|
|
use derive_more::From;
|
|
use std::time::Duration;
|
|
|
|
// TODO: our own structs for these that handle streaming large responses
|
|
type EthersHttpProvider = ethers::providers::Provider<ethers::providers::Http>;
|
|
type EthersWsProvider = ethers::providers::Provider<ethers::providers::Ws>;
|
|
|
|
/// 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>
|
|
// TODO: custom types that let us stream JSON responses
|
|
#[derive(From)]
|
|
pub enum Web3Provider {
|
|
Both(EthersHttpProvider, EthersWsProvider),
|
|
Http(EthersHttpProvider),
|
|
// TODO: deadpool? custom tokio-tungstenite
|
|
Ws(EthersWsProvider),
|
|
#[cfg(test)]
|
|
Mock,
|
|
}
|
|
|
|
impl Web3Provider {
|
|
pub fn http(&self) -> Option<&EthersHttpProvider> {
|
|
match self {
|
|
Self::Http(x) => Some(x),
|
|
_ => None,
|
|
}
|
|
}
|
|
|
|
pub fn ws(&self) -> Option<&EthersWsProvider> {
|
|
match self {
|
|
Self::Both(_, x) | Self::Ws(x) => Some(x),
|
|
_ => None,
|
|
}
|
|
}
|
|
|
|
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(12))
|
|
.into()
|
|
} else if url_str.starts_with("ws") {
|
|
let provider = ethers::providers::Ws::connect(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)
|
|
}
|
|
}
|