feat: add additional conversion fn (#1881)

* feat: add additional conversion fn

* add v3 conversion

crates/rpc-types-engine/src/payload.rs

@@ -353,6 +353,34 @@ pub struct ExecutionPayloadV2 {
 }
 
 impl ExecutionPayloadV2 {
+    /// Converts [`alloy_consensus::Block`] to [`ExecutionPayloadV2`].
+    ///
+    /// See also [`ExecutionPayloadV1::from_block_unchecked`].
+    ///
+    /// If the block does not have any withdrawals, an empty vector is used.
+    ///
+    /// Note: This re-calculates the block hash.
+    pub fn from_block_slow<T: Encodable2718>(block: &Block<T>) -> Self {
+        Self::from_block_unchecked(block.hash_slow(), block)
+    }
+
+    /// Converts [`alloy_consensus::Block`] to [`ExecutionPayloadV2`] using the given block hash.
+    ///
+    /// See also [`ExecutionPayloadV1::from_block_unchecked`].
+    ///
+    /// If the block does not have any withdrawals, an empty vector is used.
+    pub fn from_block_unchecked<T: Encodable2718>(block_hash: B256, block: &Block<T>) -> Self {
+        Self {
+            withdrawals: block
+                .body
+                .withdrawals
+                .clone()
+                .map(Withdrawals::into_inner)
+                .unwrap_or_default(),
+            payload_inner: ExecutionPayloadV1::from_block_unchecked(block_hash, block),
+        }
+    }
+
     /// Returns the timestamp for the execution payload.
     pub const fn timestamp(&self) -> u64 {
         self.payload_inner.timestamp
@@ -509,6 +537,26 @@ pub struct ExecutionPayloadV3 {
 }
 
 impl ExecutionPayloadV3 {
+    /// Converts [`alloy_consensus::Block`] to [`ExecutionPayloadV3`].
+    ///
+    /// See also [`ExecutionPayloadV2::from_block_unchecked`].
+    ///
+    /// Note: This re-calculates the block hash.
+    pub fn from_block_slow<T: Encodable2718>(block: &Block<T>) -> Self {
+        Self::from_block_unchecked(block.hash_slow(), block)
+    }
+
+    /// Converts [`alloy_consensus::Block`] to [`ExecutionPayloadV3`] using the given block hash.
+    ///
+    /// See also [`ExecutionPayloadV2::from_block_unchecked`].
+    pub fn from_block_unchecked<T: Encodable2718>(block_hash: B256, block: &Block<T>) -> Self {
+        Self {
+            blob_gas_used: block.blob_gas_used.unwrap_or_default(),
+            excess_blob_gas: block.excess_blob_gas.unwrap_or_default(),
+            payload_inner: ExecutionPayloadV2::from_block_unchecked(block_hash, block),
+        }
+    }
+
     /// Returns the withdrawals for the payload.
     pub const fn withdrawals(&self) -> &Vec<Withdrawal> {
         &self.payload_inner.withdrawals