[Feature] An Optimism Provider

[HrikB]

Component

provider, pubsub

Describe the feature you would like

Add an alloy Provider for the Optimism network.

Additional context

No response

[emhane]

lacking context what to do here exactly, do you have any links to reference impl @HrikB ?

[HrikB]

I had something like this in a private repo

#[async_trait]
pub trait OpStackProvider<T: Transport + Clone = BoxTransport>: Provider<T, Optimism> {
    const ECOTONE_HARDFORK_BLOCK: u64;
    const ECOTONE_HARDFORK_BLOCK_TIMESTAMP: u64;

    async fn output_at_block(&self, block_number: u64) -> TransportResult<OutputAtBlock> {
        let response = self
            .client()
            .request("optimism_outputAtBlock", (format!("0x{:x}", block_number),))
            .await?;

        Ok(response)
    }
}

impl<T: Transport + Clone> OpStackProvider<T> for RootProvider<T, Optimism> {
    const ECOTONE_HARDFORK_BLOCK: u64 = 117387812;
    const ECOTONE_HARDFORK_BLOCK_TIMESTAMP: u64 = 1710374401;
}

But basically I think an OptimismProvider is needed with all the optimism specific rpc endpoints. For my usecase, I only needed output_at_block.