Problem: empty topics in rpc response is not tested

Closes: #841

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

go.mod

@@ -3,9 +3,9 @@ module github.com/crypto-org-chain/cronos
 go 1.17
 
 require (
-	github.com/armon/go-metrics v0.3.9
+	github.com/armon/go-metrics v0.3.10
 	github.com/cosmos/cosmos-sdk v0.44.5
-	github.com/cosmos/ibc-go/v2 v2.0.1
+	github.com/cosmos/ibc-go/v2 v2.0.2
 	github.com/ethereum/go-ethereum v1.10.11
 	github.com/gogo/protobuf v1.3.3
 	github.com/golang/protobuf v1.5.2
@@ -14,14 +14,14 @@ require (
 	github.com/peggyjv/gravity-bridge/module v0.2.24-0.20211206214839-d22e7091a41d
 	github.com/rakyll/statik v0.1.7
 	github.com/spf13/cast v1.4.1
-	github.com/spf13/cobra v1.2.1
+	github.com/spf13/cobra v1.3.0
 	github.com/spf13/pflag v1.0.5
 	github.com/stretchr/testify v1.7.0
 	github.com/tendermint/tendermint v0.34.14
 	github.com/tendermint/tm-db v0.6.4
 	github.com/tharsis/ethermint v0.7.2
-	google.golang.org/genproto v0.0.0-20211116182654-e63d96a377c4
-	google.golang.org/grpc v1.42.0
+	google.golang.org/genproto v0.0.0-20211208223120-3a66f561d7aa
+	google.golang.org/grpc v1.43.0
 	gopkg.in/yaml.v2 v2.4.0
 )
 
@@ -40,7 +40,7 @@ require (
 	github.com/btcsuite/btcutil v1.0.3-0.20201208143702-a53e38424cce // indirect
 	github.com/cenkalti/backoff/v4 v4.1.1 // indirect
 	github.com/cespare/xxhash v1.1.0 // indirect
-	github.com/cespare/xxhash/v2 v2.1.1 // indirect
+	github.com/cespare/xxhash/v2 v2.1.2 // indirect
 	github.com/coinbase/rosetta-sdk-go v0.6.10 // indirect
 	github.com/confio/ics23/go v0.6.6 // indirect
 	github.com/cosmos/btcutil v1.0.4 // indirect
@@ -77,7 +77,7 @@ require (
 	github.com/gsterjov/go-libsecret v0.0.0-20161001094733-a6f4afe4910c // indirect
 	github.com/gtank/merlin v0.1.1 // indirect
 	github.com/gtank/ristretto255 v0.1.2 // indirect
-	github.com/hashicorp/go-immutable-radix v1.0.0 // indirect
+	github.com/hashicorp/go-immutable-radix v1.3.1 // indirect
 	github.com/hashicorp/go-uuid v1.0.2 // indirect
 	github.com/hashicorp/golang-lru v0.5.5-0.20210104140557-80c98217689d // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
@@ -99,7 +99,7 @@ require (
 	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
 	github.com/mimoo/StrobeGo v0.0.0-20181016162300-f8f6d4d2b643 // indirect
 	github.com/minio/highwayhash v1.0.1 // indirect
-	github.com/mitchellh/mapstructure v1.4.2 // indirect
+	github.com/mitchellh/mapstructure v1.4.3 // indirect
 	github.com/mtibben/percent v0.2.1 // indirect
 	github.com/olekukonko/tablewriter v0.0.5 // indirect
 	github.com/pelletier/go-toml v1.9.4 // indirect
@@ -120,7 +120,7 @@ require (
 	github.com/shirou/gopsutil v3.21.4-0.20210419000835-c7a38de76ee5+incompatible // indirect
 	github.com/spf13/afero v1.6.0 // indirect
 	github.com/spf13/jwalterweatherman v1.1.0 // indirect
-	github.com/spf13/viper v1.9.0 // indirect
+	github.com/spf13/viper v1.10.1 // indirect
 	github.com/status-im/keycard-go v0.0.0-20200402102358-957c09536969 // indirect
 	github.com/subosito/gotenv v1.2.0 // indirect
 	github.com/syndtr/goleveldb v1.0.1-0.20210819022825-2ae1ddf74ef7 // indirect
@@ -136,11 +136,11 @@ require (
 	golang.org/x/crypto v0.0.0-20211115234514-b4de73f9ece8 // indirect
 	golang.org/x/net v0.0.0-20211111160137-58aab5ef257a // indirect
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect
-	golang.org/x/sys v0.0.0-20211111213525-f221eed1c01e // indirect
+	golang.org/x/sys v0.0.0-20211210111614-af8b64212486 // indirect
 	golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1 // indirect
 	golang.org/x/text v0.3.7 // indirect
 	google.golang.org/protobuf v1.27.1 // indirect
-	gopkg.in/ini.v1 v1.63.2 // indirect
+	gopkg.in/ini.v1 v1.66.2 // indirect
 	gopkg.in/natefinch/npipe.v2 v2.0.0-20160621034901-c1b8fa8bdcce // indirect
 	gopkg.in/olebedev/go-duktape.v3 v3.0.0-20200619000410-60c24ae608a6 // indirect
 	gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b // indirect
@@ -161,4 +161,4 @@ replace github.com/cosmos/iavl => github.com/cosmos/iavl v0.17.3
 
 // https://github.com/crypto-org-chain/ethermint/tree/v0.9.x-cronos
 // FIXME make a tag or point to upstream when ready
-replace github.com/tharsis/ethermint => github.com/crypto-org-chain/ethermint v0.6.1-0.20211207040748-254df3803d62
+replace github.com/tharsis/ethermint => github.com/crypto-org-chain/ethermint v0.6.1-0.20211217022906-7cf44b945703