exit updates

consensus/state_processing/src/per_block_processing/errors.rs

@@ -451,7 +451,10 @@ pub enum ExitInvalid {
     /// The specified validator has already initiated exit.
     AlreadyInitiatedExit(u64),
     /// The exit is for a future epoch.
-    FutureEpoch { state: Epoch, exit: Epoch },
+    FutureEpoch {
+        state: Epoch,
+        exit: Epoch,
+    },
     /// The validator has not been active for long enough.
     TooYoungToExit {
         current_epoch: Epoch,
@@ -462,6 +465,7 @@ pub enum ExitInvalid {
     /// There was an error whilst attempting to get a set of signatures. The signatures may have
     /// been invalid or an internal error occurred.
     SignatureSetError(SignatureSetError),
+    PendingWithdrawalInQueue(u64),
 }
 
 #[derive(Debug, PartialEq, Clone)]

consensus/state_processing/src/per_block_processing/verify_exit.rs

@@ -79,5 +79,16 @@ pub fn verify_exit<E: EthSpec>(
         );
     }
 
+    // [New in Electra:EIP7251]
+    // Only exit validator if it has no pending withdrawals in the queue
+    if let Ok(pending_balance_to_withdraw) =
+        state.get_pending_balance_to_withdraw(exit.validator_index as usize)
+    {
+        verify!(
+            pending_balance_to_withdraw == 0,
+            ExitInvalid::PendingWithdrawalInQueue(exit.validator_index)
+        );
+    }
+
     Ok(())
 }