x/staking: cli migration to use gRPC query client (#6728)

* migrated to use gRPC query client

* removed codecs usage

* review change

* added read command flags

* added pagination flags

* fixed limit issue

* added helper function for default pagination flags

* review changes

* review change

* review changes

Co-authored-by: Federico Kunze <31522760+fedekunze@users.noreply.github.com>
Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

client/flags/flags.go

@@ -61,6 +61,9 @@ const (
 	FlagPage             = "page"
 	FlagLimit            = "limit"
 	FlagSignMode         = "sign-mode"
+	FlagPageKey          = "page-key"
+	FlagOffset           = "offset"
+	FlagCountTotal       = "count-total"
 )
 
 // LineBreak can be included in a command list to provide a blank line
@@ -123,6 +126,14 @@ func AddTxFlagsToCmd(cmd *cobra.Command) {
 	viper.BindPFlag(FlagKeyringBackend, cmd.Flags().Lookup(FlagKeyringBackend))
 }
 
+// AddPaginationFlagsToCmd adds common paginations flags to command
+func AddPaginationFlagsToCmd(cmd *cobra.Command, query string) {
+	cmd.Flags().String(FlagPageKey, "", fmt.Sprintf("pagination page-key of %s to query for", query))
+	cmd.Flags().Uint64(FlagOffset, 0, fmt.Sprintf("pagination offset of %s to query for", query))
+	cmd.Flags().Uint64(FlagLimit, 100, fmt.Sprintf("pagination limit of %s to query for", query))
+	cmd.Flags().Bool(FlagCountTotal, false, fmt.Sprintf("count total number of records in %s to query for", query))
+}
+
 // GasSetting encapsulates the possible values passed through the --gas flag.
 type GasSetting struct {
 	Simulate bool

client/utils.go

@@ -1,5 +1,11 @@
 package client
 
+import (
+	"github.com/cosmos/cosmos-sdk/client/flags"
+	"github.com/cosmos/cosmos-sdk/types/query"
+	"github.com/spf13/pflag"
+)
+
 // Paginate returns the correct starting and ending index for a paginated query,
 // given that client provides a desired page and limit of objects and the handler
 // provides the total number of objects. The start page is assumed to be 1-indexed.
@@ -35,3 +41,18 @@ func Paginate(numObjs, page, limit, defLimit int) (start, end int) {
 
 	return start, end
 }
+
+// ReadPageRequest reads and builds the necessary page request flags for pagination.
+func ReadPageRequest(flagSet *pflag.FlagSet) *query.PageRequest {
+	pageKey, _ := flagSet.GetString(flags.FlagPageKey)
+	offset, _ := flagSet.GetUint64(flags.FlagOffset)
+	limit, _ := flagSet.GetUint64(flags.FlagLimit)
+	countTotal, _ := flagSet.GetBool(flags.FlagCountTotal)
+
+	return &query.PageRequest{
+		Key:        []byte(pageKey),
+		Offset:     offset,
+		Limit:      limit,
+		CountTotal: countTotal,
+	}
+}