feat: add key gen util and simple fcu validation test with custom alloc (#3842)

crates/consensus/beacon/src/engine/mod.rs

@@ -2538,8 +2538,11 @@ mod tests {
 
     mod new_payload {
         use super::*;
-        use reth_interfaces::test_utils::{generators, generators::random_block};
-        use reth_primitives::{Hardfork, U256};
+        use reth_interfaces::test_utils::{
+            generators,
+            generators::{generate_keys, random_block},
+        };
+        use reth_primitives::{public_key_to_address, Genesis, GenesisAccount, Hardfork, U256};
         use reth_provider::test_utils::blocks::BlockChainTestData;
 
         #[tokio::test]
@@ -2629,6 +2632,56 @@ mod tests {
             assert_matches!(engine_rx.try_recv(), Err(TryRecvError::Empty));
         }
 
+        #[tokio::test]
+        async fn simple_validate_block() {
+            let mut rng = generators::rng();
+            let genesis_keys = generate_keys(&mut rng, 16);
+            let amount = 1000000000000000000u64;
+            let alloc = genesis_keys.iter().map(|pair| {
+                (
+                    public_key_to_address(pair.public_key()),
+                    GenesisAccount::default().with_balance(U256::from(amount)),
+                )
+            });
+
+            let genesis = Genesis::default().extend_accounts(alloc);
+
+            let chain_spec = Arc::new(
+                ChainSpecBuilder::default()
+                    .chain(MAINNET.chain)
+                    .genesis(genesis)
+                    .shanghai_activated()
+                    .build(),
+            );
+
+            let (consensus_engine, env) =
+                TestConsensusEngineBuilder::<NoopFullBlockClient>::new(chain_spec.clone()).build();
+
+            let genesis =
+                SealedBlock { header: chain_spec.sealed_genesis_header(), ..Default::default() };
+            let block1 = random_block(&mut rng, 1, Some(chain_spec.genesis_hash()), None, Some(0));
+
+            // TODO: add transactions that transfer from the alloc accounts, generating the new
+            // block tx and state root
+
+            insert_blocks(env.db.as_ref(), chain_spec.clone(), [&genesis, &block1].into_iter());
+
+            let mut engine_rx = spawn_consensus_engine(consensus_engine);
+
+            // Send forkchoice
+            let res = env
+                .send_forkchoice_updated(ForkchoiceState {
+                    head_block_hash: block1.hash,
+                    finalized_block_hash: block1.hash,
+                    ..Default::default()
+                })
+                .await;
+            let expected_result = PayloadStatus::from_status(PayloadStatusEnum::Valid)
+                .with_latest_valid_hash(block1.hash);
+            assert_matches!(res, Ok(ForkchoiceUpdated { payload_status, .. }) => assert_eq!(payload_status, expected_result));
+            assert_matches!(engine_rx.try_recv(), Err(TryRecvError::Empty));
+        }
+
         #[tokio::test]
         async fn payload_parent_unknown() {
             let mut rng = generators::rng();

crates/interfaces/src/test_utils/generators.rs

@@ -104,6 +104,12 @@ pub fn sign_tx_with_key_pair(key_pair: KeyPair, tx: Transaction) -> TransactionS
     TransactionSigned::from_transaction_and_signature(tx, signature)
 }
 
+/// Generates a set of [KeyPair]s based on the desired count.
+pub fn generate_keys<R: Rng>(rng: &mut R, count: usize) -> Vec<KeyPair> {
+    let secp = Secp256k1::new();
+    (0..count).map(|_| KeyPair::new(&secp, rng)).collect()
+}
+
 /// Generate a random block filled with signed transactions (generated using
 /// [random_signed_tx]). If no transaction count is provided, the number of transactions
 /// will be random, otherwise the provided count will be used.
@@ -363,7 +369,9 @@ mod test {
 
     use super::*;
     use hex_literal::hex;
-    use reth_primitives::{keccak256, AccessList, Address, TransactionKind, TxEip1559};
+    use reth_primitives::{
+        keccak256, public_key_to_address, AccessList, Address, TransactionKind, TxEip1559,
+    };
     use secp256k1::KeyPair;
 
     #[test]
@@ -393,9 +401,7 @@ mod test {
             let signed = TransactionSigned::from_transaction_and_signature(tx.clone(), signature);
             let recovered = signed.recover_signer().unwrap();
 
-            let public_key_hash = keccak256(&key_pair.public_key().serialize_uncompressed()[1..]);
-            let expected = Address::from_slice(&public_key_hash[12..]);
-
+            let expected = public_key_to_address(key_pair.public_key());
             assert_eq!(recovered, expected);
         }
     }

crates/primitives/src/lib.rs

@@ -84,7 +84,7 @@ pub use revm_primitives::JumpMap;
 pub use serde_helper::JsonU256;
 pub use storage::StorageEntry;
 pub use transaction::{
-    util::secp256k1::{recover_signer, sign_message},
+    util::secp256k1::{public_key_to_address, recover_signer, sign_message},
     AccessList, AccessListItem, AccessListWithGasUsed, FromRecoveredTransaction,
     IntoRecoveredTransaction, InvalidTransactionError, Signature, Transaction, TransactionKind,
     TransactionMeta, TransactionSigned, TransactionSignedEcRecovered, TransactionSignedNoHash,

crates/primitives/src/transaction/util.rs

@@ -6,7 +6,7 @@ pub(crate) mod secp256k1 {
     pub(crate) use ::secp256k1::Error;
     use ::secp256k1::{
         ecdsa::{RecoverableSignature, RecoveryId},
-        Message, SecretKey, SECP256K1,
+        Message, PublicKey, SecretKey, SECP256K1,
     };
     use revm_primitives::{B256, U256};
 
@@ -18,11 +18,7 @@ pub(crate) mod secp256k1 {
             RecoverableSignature::from_compact(&sig[0..64], RecoveryId::from_i32(sig[64] as i32)?)?;
 
         let public = SECP256K1.recover_ecdsa(&Message::from_slice(&msg[..32])?, &sig)?;
-
-        // strip out the first byte because that should be the SECP256K1_TAG_PUBKEY_UNCOMPRESSED
-        // tag returned by libsecp's uncompressed pubkey serialization
-        let hash = keccak256(&public.serialize_uncompressed()[1..]);
-        Ok(Address::from_slice(&hash[12..]))
+        Ok(public_key_to_address(public))
     }
 
     /// Signs message with the given secret key.
@@ -39,6 +35,15 @@ pub(crate) mod secp256k1 {
         };
         Ok(signature)
     }
+
+    /// Converts a public key into an ethereum address by hashing the encoded public key with
+    /// keccak256.
+    pub fn public_key_to_address(public: PublicKey) -> Address {
+        // strip out the first byte because that should be the SECP256K1_TAG_PUBKEY_UNCOMPRESSED
+        // tag returned by libsecp's uncompressed pubkey serialization
+        let hash = keccak256(&public.serialize_uncompressed()[1..]);
+        Address::from_slice(&hash[12..])
+    }
 }
 #[cfg(test)]
 mod tests {