Problem: empty topics in rpc response is not tested

backport: #254

Solution:
- merge empty topics fix
- add integration tests to verify

go.mod

@@ -164,4 +164,4 @@ replace github.com/ethereum/go-ethereum => github.com/crypto-org-chain/go-ethere
 // TODO: remove when ibc-go and ethermint upgrades cosmos-sdk
 replace github.com/cosmos/cosmos-sdk => github.com/cosmos/cosmos-sdk v0.44.2
 
-replace github.com/tharsis/ethermint => github.com/crypto-org-chain/ethermint v0.7.2-cronos-4
+replace github.com/tharsis/ethermint => github.com/crypto-org-chain/ethermint v0.7.2-cronos-5

go.sum

@@ -261,8 +261,8 @@ github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:ma
 github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
 github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
-github.com/crypto-org-chain/ethermint v0.7.2-cronos-4 h1:NaCc0L5zN2u7B9WofmhJfur23UDebWSRD+Goqf9URnY=
-github.com/crypto-org-chain/ethermint v0.7.2-cronos-4/go.mod h1:J96LX4KvLyl+5jV6+mt/4l6srtGX/mdDTuqQQuYrdDk=
+github.com/crypto-org-chain/ethermint v0.7.2-cronos-5 h1:pNlajIJZkBxMNIvKeNys2lPSRupz6kANMsA4BZvObMk=
+github.com/crypto-org-chain/ethermint v0.7.2-cronos-5/go.mod h1:J96LX4KvLyl+5jV6+mt/4l6srtGX/mdDTuqQQuYrdDk=
 github.com/crypto-org-chain/go-ethereum v1.10.3-patched h1:kr6oQIYOi2VC8SZwkhlUDZE1Omit/YHVysKMgCB2nes=
 github.com/crypto-org-chain/go-ethereum v1.10.3-patched/go.mod h1:99onQmSd1GRGOziyGldI41YQb7EESX3Q4H41IfJgIQQ=
 github.com/crypto-org-chain/ibc-go v1.2.1-hooks h1:wuWaQqm/TFKJQwuFgjCPiPumQio+Yik5Z1DObDExrrU=

gomod2nix.toml

@@ -4637,13 +4637,13 @@
     sha256 = "1kmdk3v2a6ygcg2i8jfgz61yzxi4183xgzlaviq9jwsqwc2hj60w"
 
 ["github.com/tharsis/ethermint"]
-  sumVersion = "v0.7.2-cronos-4"
+  sumVersion = "v0.7.2-cronos-5"
   vendorPath = "github.com/crypto-org-chain/ethermint"
   ["github.com/tharsis/ethermint".fetch]
     type = "git"
     url = "https://github.com/crypto-org-chain/ethermint"
-    rev = "82805507f7d2e83cad547736883dc22acfb52440"
-    sha256 = "01f9i8vq0jqml676wvh0kr9kxg7grqw7f64g1qd81pzm2n89k7pn"
+    rev = "6defb508eabee4d7866da6858dc9fe0a5c82a33a"
+    sha256 = "01rl5q6wxv0blil4bzz023g9pyp15dbz57b68f9zp3jv0c0a89ad"
 
 ["github.com/tidwall/gjson"]
   sumVersion = "v1.6.7"

integration_tests/contracts/contracts/TestERC20Utility.sol

@@ -27,4 +27,9 @@ contract TestERC20Utility is ERC20 {
         _burn(msg.sender, total);
         emit __CronosSendToEthereum(recipient, amount, bridge_fee);
     }
+
+    function test_log0() public {
+        bytes32 data = "hello world";
+        log0(bytes32(data));
+    }
 }

integration_tests/test_basic.py

@@ -218,3 +218,22 @@ def test_statesync(cronos):
     )
 
     print("succesfully syncing")
+
+
+def test_log0(cluster):
+    """
+    test compliance of empty topics behavior
+    """
+    w3 = cluster.w3
+    contract = deploy_contract(
+        w3,
+        Path(__file__).parent
+        / "contracts/artifacts/contracts/TestERC20Utility.sol/TestERC20Utility.json",
+    )
+    tx = contract.functions.test_log0().buildTransaction({"from": ADDRS["validator"]})
+    receipt = send_transaction(w3, tx, KEYS["validator"])
+    assert receipt.topics == []
+    assert (
+        receipt.data
+        == "0x68656c6c6f20776f726c64000000000000000000000000000000000000000000"
+    )