fix: error handling on config file

cmd/root.go

@@ -1,6 +1,7 @@
 package cmd
 
 import (
+	"errors"
 	"fmt"
 	"os"
 
@@ -55,7 +56,8 @@ func ReadPersistentFlags(cmd *cobra.Command) error {
 
 	if err := v.ReadInConfig(); err != nil {
 		// It's okay if there isn't a config file
-		if _, ok := err.(viper.ConfigFileNotFoundError); !ok {
+		var configFileNotFound viper.ConfigFileNotFoundError
+		if !errors.As(err, &configFileNotFound) {
 			return err
 		}
 	}

cmd/send.go

@@ -1,36 +1,36 @@
 package cmd
 
 import (
-    "context"
+	"context"
 
-    "okp4/cosmos-faucet/pkg/client"
+	"okp4/cosmos-faucet/pkg/client"
 
-    "github.com/spf13/cobra"
+	"github.com/spf13/cobra"
 )
 
 // NewSendCommand returns a CLI command to interactively send amount token(s) to given address.
 func NewSendCommand() *cobra.Command {
-    sendCmd := &cobra.Command{
-        Use:   "send <address>",
-        Short: "Send tokens to a given address",
-        Args:  cobra.ExactArgs(1),
-        RunE: func(cmd *cobra.Command, args []string) error {
-            faucet, err := client.NewFaucet(context.Background(), config)
-            if err != nil {
-                return err
-            }
-
-            defer func(faucet *client.Faucet) {
-                _ = faucet.Close()
-            }(faucet)
-
-            return faucet.SendTxMsg(args[0])
-        },
-    }
-
-    return sendCmd
+	sendCmd := &cobra.Command{
+		Use:   "send <address>",
+		Short: "Send tokens to a given address",
+		Args:  cobra.ExactArgs(1),
+		RunE: func(cmd *cobra.Command, args []string) error {
+			faucet, err := client.NewFaucet(context.Background(), config)
+			if err != nil {
+				return err
+			}
+
+			defer func(faucet *client.Faucet) {
+				_ = faucet.Close()
+			}(faucet)
+
+			return faucet.SendTxMsg(args[0])
+		},
+	}
+
+	return sendCmd
 }
 
 func init() {
-    rootCmd.AddCommand(NewSendCommand())
+	rootCmd.AddCommand(NewSendCommand())
 }

cmd/start.go

@@ -23,7 +23,6 @@ func NewStartCommand() *cobra.Command {
 		Use:   "start",
 		Short: "Start the REST api",
 		RunE: func(cmd *cobra.Command, args []string) error {
-
 			faucet, err := client.NewFaucet(context.Background(), config)
 			if err != nil {
 				return err

pkg/client/faucet.go

@@ -41,8 +41,12 @@ func NewFaucet(ctx context.Context, config pkg.Config) (*Faucet, error) {
 	if err != nil {
 		return nil, err
 	}
+
 	fromAddr := types.AccAddress(fromPrivKey.PubKey().Address())
 	account, err := cosmos.GetAccount(ctx, grpcConn, fromAddr.String())
+	if err != nil {
+		return nil, err
+	}
 
 	return &Faucet{
 		Context:     ctx,