test gas refund when contract tx is reverted

integration_tests/test_basic.py

@@ -414,6 +414,34 @@ def test_exception(cluster):
  assert 5 * (10**18) == contract.caller.query()
 
 
+def test_refund_unused_gas_when_contract_tx_reverted(cluster):
+ """
+ Call a smart contract method that reverts with very high gas limit
+
+ Call tx receipt should be status 0 (fail)
+ Fee is gasUsed * effectiveGasPrice
+ """
+ w3 = cluster.w3
+ contract = deploy_contract(w3, CONTRACTS["TestRevert"])
+ more_than_enough_gas = 1000000
+
+ balance_bef = w3.eth.get_balance(ADDRS["community"])
+ receipt = send_transaction(
+ w3,
+ contract.functions.transfer(5 * (10**18) - 1).buildTransaction(
+ {"gas": more_than_enough_gas}
+ ),
+ key=KEYS["community"],
+ )
+ balance_aft = w3.eth.get_balance(ADDRS["community"])
+
+ assert receipt["status"] == 0, "should be a failed tx"
+ assert receipt["gasUsed"] != more_than_enough_gas
+ assert (
+ balance_bef - balance_aft == receipt["gasUsed"] * receipt["effectiveGasPrice"]
+ )
+
+
 def test_message_call(cronos):
  "stress test the evm by doing message calls as much as possible"
  w3 = cronos.w3