fix random withdrawals

tests/core/pyspec/eth2spec/test/helpers/execution_payload.py

@@ -8,10 +8,7 @@
 from eth2spec.test.helpers.keys import privkeys
 from eth2spec.utils.ssz.ssz_impl import hash_tree_root
 from eth2spec.debug.random_value import get_random_bytes_list
-from eth2spec.test.helpers.withdrawals import (
-    get_expected_withdrawals,
-    get_random_withdrawal,
-)
+from eth2spec.test.helpers.withdrawals import get_expected_withdrawals
 from eth2spec.test.helpers.forks import (
     is_post_capella,
     is_post_deneb,
@@ -369,6 +366,7 @@ def build_empty_execution_payload(spec, state, randao_mix=None):
 
 
 def build_randomized_execution_payload(spec, state, rng):
+    from eth2spec.test.helpers.random import exit_random_validators
     execution_payload = build_empty_execution_payload(spec, state)
     execution_payload.fee_recipient = spec.ExecutionAddress(get_random_bytes_list(rng, 20))
     execution_payload.state_root = spec.Bytes32(get_random_bytes_list(rng, 32))
@@ -390,12 +388,19 @@ def build_randomized_execution_payload(spec, state, rng):
         get_random_tx(rng)
         for _ in range(num_transactions)
     ]
+
     if is_post_capella(spec):
-        num_withdrawals = rng.randint(0, spec.MAX_WITHDRAWALS_PER_PAYLOAD)
-        execution_payload.withdrawals = [
-            get_random_withdrawal(spec, state, rng)
-            for _ in range(num_withdrawals)
-        ]
+        current_epoch = spec.get_current_epoch(state)
+        exit_random_validators(
+            spec,
+            state,
+            rng,
+            exit_epoch=current_epoch,
+            withdrawable_epoch=current_epoch,
+            from_epoch=current_epoch
+        )
+        execution_payload.withdrawals = get_expected_withdrawals(spec, state)
+
     if is_post_deneb(spec):
         execution_payload.blob_gas_used = rng.randint(0, int(10e10))
         execution_payload.excess_blob_gas = rng.randint(0, int(10e10))