Add TxsByEvent gRPC endpoint (#7842)

* add service definition for TxsByEvents

* add TxsByEvent gRPC endpoint

* fix lint

* fix test

* review changes

* review changes

* fix proto descriptions

* review changes

* fix lint

* review changes

* Update proto/cosmos/tx/v1beta1/service.proto

* review changes

Co-authored-by: Aleksandr Bezobchuk <alexanderbez@users.noreply.github.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

proto/cosmos/tx/v1beta1/service.proto

@@ -4,6 +4,7 @@ package cosmos.tx.v1beta1;
 import "google/api/annotations.proto";
 import "cosmos/base/abci/v1beta1/abci.proto";
 import "cosmos/tx/v1beta1/tx.proto";
+import "cosmos/base/query/v1beta1/pagination.proto";
 
 option go_package = "github.com/cosmos/cosmos-sdk/types/tx";
 
@@ -17,6 +18,31 @@ service Service {
     rpc GetTx(GetTxRequest) returns (GetTxResponse) {
         option (google.api.http).get = "/cosmos/tx/v1beta1/tx/{hash}";
     }
+
+    // GetTxsEvent fetches txs by event.
+    rpc GetTxsEvent(GetTxsEventRequest) returns (GetTxsEventResponse) {
+        option (google.api.http).get = "/cosmos/tx/v1beta1/txs";
+    }
+}
+
+// GetTxsEventRequest is the request type for the Service.TxsByEvents
+// RPC method.
+message GetTxsEventRequest {
+    // event is the transaction event type.
+    string event = 1;
+    // pagination defines an pagination for the request.
+    cosmos.base.query.v1beta1.PageRequest pagination = 2;
+}
+
+// GetTxsEventResponse is the response type for the Service.TxsByEvents
+// RPC method.
+message GetTxsEventResponse {
+    // txs is the list of queried transactions.
+    repeated cosmos.tx.v1beta1.Tx txs = 1;
+    // tx_responses is the list of queried TxResponses.
+    repeated cosmos.base.abci.v1beta1.TxResponse tx_responses = 2;
+    // pagination defines an pagination for the response.
+    cosmos.base.query.v1beta1.PageResponse pagination = 3;
 }
 
 // SimulateRequest is the request type for the Service.Simulate
@@ -35,15 +61,17 @@ message SimulateResponse {
     cosmos.base.abci.v1beta1.Result result = 2;
 }
 
-// GetTx is the request type for the Service.GetTx
+// GetTxRequest is the request type for the Service.GetTx
 // RPC method.
 message GetTxRequest {
     // hash is the tx hash to query, encoded as a hex string.
    string hash = 1;
 }
-  
+
 // GetTxResponse is the response type for the Service.GetTx method.
 message GetTxResponse {
     // tx is the queried transaction.
     cosmos.tx.v1beta1.Tx tx = 1;
-}
+    // tx_response is the queried TxResponses.
+    cosmos.base.abci.v1beta1.TxResponse tx_response = 2;
+}

types/query/filtered_pagination.go

@@ -35,7 +35,7 @@ func FilteredPaginate(
 	}
 
 	if limit == 0 {
-		limit = defaultLimit
+		limit = DefaultLimit
 
 		// count total results when the limit is zero/not supplied
 		countTotal = true

types/query/pagination.go

@@ -6,9 +6,9 @@ import (
 	"github.com/cosmos/cosmos-sdk/store/types"
 )
 
-// defaultLimit is the default `limit` for queries
-// if the `limit` is not supplied, paginate will use `defaultLimit`
-const defaultLimit = 100
+// DefaultLimit is the default `limit` for queries
+// if the `limit` is not supplied, paginate will use `DefaultLimit`
+const DefaultLimit = 100
 
 // Paginate does pagination of all the results in the PrefixStore based on the
 // provided PageRequest. onResult should be used to do actual unmarshaling.
@@ -33,7 +33,7 @@ func Paginate(
 	}
 
 	if limit == 0 {
-		limit = defaultLimit
+		limit = DefaultLimit
 
 		// count total results when the limit is zero/not supplied
 		countTotal = true