927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112 | @pytest.mark.parametrize(
"is_success", [True, False], ids=["exact_gas", "exact_gas_minus_1"]
)
@pytest.mark.parametrize(
"originator_balance",
[0, 1],
ids=["no_balance", "has_balance"],
)
@pytest.mark.parametrize(
"same_tx", [False, True], ids=["pre_deploy", "same_tx"]
)
@pytest.mark.valid_from("TangerineWhistle")
def test_selfdestruct_to_self(
pre: Alloc,
blockchain_test: BlockchainTestFiller,
fork: Fork,
is_success: bool,
originator_balance: int,
same_tx: bool,
) -> None:
"""
Test SELFDESTRUCT where beneficiary is the executing contract itself.
Uses Op.SELFDESTRUCT(Op.ADDRESS) - the victim selfdestructs to itself.
Key characteristics:
- Beneficiary is always warm (it's the executing contract)
- Beneficiary is always alive (EIP-161 nonce=1)
- No NEW_ACCOUNT charge
- No cold access charge (>=Berlin)
- Balance is "transferred" to self (no net change until destruction)
Gas boundary:
- exact_gas: SELFDESTRUCT completes successfully
- exact_gas_minus_1: OOG, SELFDESTRUCT fails
Post-destruction behavior (is_success=True only):
- Pre-Cancun or same_tx: contract destroyed, balance = 0
- >=Cancun pre-existing: contract NOT destroyed, balance preserved
"""
alice = pre.fund_eoa()
victim_code = Op.SELFDESTRUCT(Op.ADDRESS)
# Gas: ADDRESS + SELFDESTRUCT (no cold access, no NEW_ACCOUNT)
base_gas = Op.SELFDESTRUCT(
Op.ADDRESS, address_warm=True, account_new=False
).gas_cost(fork)
inner_call_gas = base_gas if is_success else base_gas - 1
if same_tx:
# Deploy and selfdestruct in same transaction via factory
initcode = Initcode(deploy_code=victim_code)
initcode_len = len(initcode)
factory_code = Om.MSTORE(initcode, 0) + Op.CALL(
gas=inner_call_gas,
address=Op.CREATE(
value=originator_balance, offset=0, size=initcode_len
),
)
caller = pre.deploy_contract(
code=factory_code,
balance=originator_balance,
)
victim = compute_create_address(address=caller, nonce=1)
else:
# Pre-existing contract
victim = pre.deploy_contract(
code=victim_code, balance=originator_balance
)
caller_code = Op.CALL(gas=inner_call_gas, address=victim)
caller = pre.deploy_contract(code=caller_code)
tx = Transaction(
sender=alice,
to=caller,
gas_limit=500_000,
protected=fork.supports_protected_txs(),
)
# Build BAL expectations
expected_bal: BlockAccessListExpectation | None = None
if fork.is_eip_enabled(7928):
if same_tx:
if is_success:
# Created and destroyed in same tx - no net changes for victim
victim_expectation = BalAccountExpectation.empty()
else:
# OOG: CREATE succeeded but SELFDESTRUCT failed
victim_expectation = BalAccountExpectation(
nonce_changes=[
BalNonceChange(block_access_index=1, post_nonce=1)
],
code_changes=[
BalCodeChange(
block_access_index=1,
new_code=bytes(victim_code),
)
],
)
if originator_balance > 0:
victim_expectation.balance_changes.append(
BalBalanceChange(
block_access_index=1,
post_balance=originator_balance,
)
)
caller_expectation = BalAccountExpectation(
nonce_changes=[
BalNonceChange(block_access_index=1, post_nonce=2)
],
)
if originator_balance > 0:
caller_expectation.balance_changes.append(
BalBalanceChange(block_access_index=1, post_balance=0)
)
else:
# Pre-existing: victim in BAL
if not is_success:
# OOG: victim accessed but no state changes
victim_expectation = BalAccountExpectation.empty()
elif fork >= Cancun:
# >=Cancun success: contract survives with original balance
victim_expectation = BalAccountExpectation.empty()
elif originator_balance > 0:
# Pre-Cancun success: contract destroyed
victim_expectation = BalAccountExpectation(
balance_changes=[
BalBalanceChange(block_access_index=1, post_balance=0)
],
)
else:
victim_expectation = BalAccountExpectation.empty()
caller_expectation = BalAccountExpectation.empty()
expected_bal = BlockAccessListExpectation(
account_expectations={
alice: BalAccountExpectation(
nonce_changes=[
BalNonceChange(block_access_index=1, post_nonce=1)
],
),
caller: caller_expectation,
victim: victim_expectation,
}
)
# Build post state
caller_nonce = 2 if same_tx else 1
if not is_success:
# OOG: SELFDESTRUCT failed, contract survives
if same_tx:
post: dict = {
alice: Account(nonce=1),
caller: Account(nonce=caller_nonce, balance=0),
victim: Account(balance=originator_balance, code=victim_code),
}
else:
post = {
alice: Account(nonce=1),
caller: Account(nonce=caller_nonce),
victim: Account(balance=originator_balance, code=victim_code),
}
else:
contract_destroyed = fork < Cancun or same_tx
if contract_destroyed:
post = {
alice: Account(nonce=1),
caller: Account(nonce=caller_nonce),
victim: Account.NONEXISTENT,
}
else:
# >=Cancun pre-existing: code preserved, balance preserved
post = {
alice: Account(nonce=1),
caller: Account(nonce=caller_nonce),
victim: Account(balance=originator_balance, code=victim_code),
}
blockchain_test(
pre=pre,
blocks=[Block(txs=[tx], expected_block_access_list=expected_bal)],
post=post,
)
|