feat: support web3_sha3 provider function

crates/alloy/Cargo.toml

@@ -172,6 +172,7 @@ provider-anvil-node = [
     "alloy-provider?/anvil-node",
     "node-bindings",
 ]
+provider-web3-api = ["providers", "alloy-provider?/web3-api"]
 
 # pubsub
 pubsub = [

crates/provider/Cargo.toml

@@ -99,3 +99,4 @@ engine-api = ["dep:alloy-rpc-types-engine"]
 net-api = []
 trace-api = ["dep:alloy-rpc-types-trace"]
 txpool-api = ["dep:alloy-rpc-types-txpool"]
+web3-api = []

crates/provider/src/ext/mod.rs

@@ -34,3 +34,8 @@ pub use trace::{TraceApi, TraceCallList};
 mod txpool;
 #[cfg(feature = "txpool-api")]
 pub use txpool::TxPoolApi;
+
+#[cfg(feature = "web3-api")]
+mod web3;
+#[cfg(feature = "web3-api")]
+pub use web3::Web3Api;

crates/provider/src/ext/web3.rs

@@ -0,0 +1,53 @@
+//! This module extends the Ethereum JSON-RPC provider with the Web3 namespace's RPC methods.
+use crate::Provider;
+use alloy_network::Network;
+use alloy_transport::{Transport, TransportResult};
+
+/// Web3 namespace rpc interface that provides access to web3 information of the node.
+#[cfg_attr(target_arch = "wasm32", async_trait::async_trait(?Send))]
+#[cfg_attr(not(target_arch = "wasm32"), async_trait::async_trait)]
+pub trait Web3Api<N, T>: Send + Sync {
+    /// Gets the client version of the chain client.
+    async fn web3_client_version(&self) -> TransportResult<String>;
+    /// Gets the Keccak-256 hash of the given data.
+    async fn web3_sha3(&self, data: &[u8]) -> TransportResult<String>;
+}
+
+#[cfg_attr(target_arch = "wasm32", async_trait::async_trait(?Send))]
+#[cfg_attr(not(target_arch = "wasm32"), async_trait::async_trait)]
+impl<N, T, P> Web3Api<N, T> for P
+where
+    N: Network,
+    T: Transport + Clone,
+    P: Provider<T, N>,
+{
+    async fn web3_client_version(&self) -> TransportResult<String> {
+        self.client().request("web3_clientVersion", ()).await
+    }
+
+    async fn web3_sha3(&self, data: &[u8]) -> TransportResult<String> {
+        self.client().request("web3_sha3", (data,)).await
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::ProviderBuilder;
+
+    use super::*;
+
+    #[tokio::test]
+    async fn test_web3_client_version() {
+        let provider = ProviderBuilder::new().on_anvil();
+        let version = provider.web3_client_version().await.unwrap();
+        assert!(!version.is_empty());
+    }
+
+    #[tokio::test]
+    async fn test_web3_sha3() {
+        let provider = ProviderBuilder::new().on_anvil();
+        let data = "alloy".as_bytes();
+        let hash = provider.web3_sha3(data).await.unwrap();
+        assert!(!hash.is_empty());
+    }
+}