Add helper for bundle construction

Author: jmcph4

searcher-api-types/Cargo.toml

@@ -9,6 +9,8 @@ serde_json = { workspace = true }
 
 serde_with = "3.0.0"
 alloy-primitives = "0.8"
+alloy-rlp = "0.3"
 alloy-rpc-types-mev = "0.8"
 alloy-serde = "0.8"
 reth-primitives = { git = "https://github.com/paradigmxyz/reth", rev = "1e965caf5fa176f244a31c0d2662ba1b590938db" } # Reth 1.2
+eyre = "0.6.12"

searcher-api-types/src/beaver.rs

@@ -1,5 +1,7 @@
 //! RPC types that are supported by Beaverbuild
-use alloy_primitives::{Address, BlockNumber, TxHash};
+use alloy_primitives::{hex, Address, BlockNumber, TxHash};
+use alloy_rlp::Decodable;
+use eyre::eyre;
 use reth_primitives::TransactionSigned;
 use serde::{Deserialize, Serialize};
 use serde_with::{serde_as, skip_serializing_none};
@@ -40,6 +42,26 @@ pub struct BeaverBundle {
     pub refund_transaction_hashes: Vec<TxHash>,
 }
 
+impl BeaverBundle {
+    pub fn from_rlp_hex(txs: Vec<String>, block_number: BlockNumber) -> eyre::Result<Self> {
+        Ok(Self {
+            transactions: txs
+                .iter()
+                .map(|hex_string| {
+                    hex::decode(hex_string)
+                        .map_err(|e| eyre!("Invalid hexadecimal string: {e:?}"))
+                        .and_then(|decoded_bytes| {
+                            TransactionSigned::decode(&mut decoded_bytes.as_slice())
+                                .map_err(|e| eyre!("Illegal RLP bytes for transaction: {e:?}"))
+                        })
+                })
+                .collect::<Result<Vec<TransactionSigned>, _>>()?,
+            block_number,
+            ..Self::default()
+        })
+    }
+}
+
 #[cfg(test)]
 mod test {
     use super::*;