feat: Add trace_get (#987)

* trace_get implementation

* Review

* Update crates/provider/src/ext/trace.rs

docs

Co-authored-by: Matthias Seitz <[email protected]>

* Cargo fmt

---------

Co-authored-by: Matthias Seitz <[email protected]>

crates/provider/src/ext/trace.rs

@@ -3,6 +3,7 @@ use crate::{Provider, RpcWithBlock};
 use alloy_eips::BlockNumberOrTag;
 use alloy_network::Network;
 use alloy_primitives::TxHash;
+use alloy_rpc_types_eth::Index;
 use alloy_rpc_types_trace::{
     filter::TraceFilter,
     parity::{LocalizedTransactionTrace, TraceResults, TraceResultsWithTransactionHash, TraceType},
@@ -50,6 +51,18 @@ where
         hash: TxHash,
     ) -> TransportResult<Vec<LocalizedTransactionTrace>>;
 
+    /// Traces of the transaction on the given positions
+    ///
+    /// # Note
+    ///
+    /// This function accepts single index and build list with it under the hood because
+    /// trace_get method accepts list of indices but limits this list to len == 1.
+    async fn trace_get(
+        &self,
+        hash: TxHash,
+        index: usize,
+    ) -> TransportResult<LocalizedTransactionTrace>;
+
     /// Trace the given raw transaction.
     async fn trace_raw_transaction(
         &self,
@@ -119,6 +132,15 @@ where
         self.client().request("trace_transaction", (hash,)).await
     }
 
+    async fn trace_get(
+        &self,
+        hash: TxHash,
+        index: usize,
+    ) -> TransportResult<LocalizedTransactionTrace> {
+        // We are using `[index]` because API accepts a list, but only supports a single index
+        self.client().request("trace_get", (hash, (Index::from(index),))).await
+    }
+
     async fn trace_raw_transaction(
         &self,
         data: &[u8],