Address PR comments

client/context/viper.go

@@ -14,6 +14,7 @@ import (
 	"github.com/cosmos/cosmos-sdk/client/core"
 )
 
+// NewCoreContextFromViper - return a new context with parameters from the command line
 func NewCoreContextFromViper() core.CoreContext {
 	nodeURI := viper.GetString(client.FlagNode)
 	var rpc rpcclient.Client
@@ -21,19 +22,11 @@ func NewCoreContextFromViper() core.CoreContext {
 		rpc = rpcclient.NewHTTP(nodeURI, "/websocket")
 	}
 	chainID := viper.GetString(client.FlagChainID)
-	// if chain ID is not specified manually, read chain ID from genesis file if present
+	// if chain ID is not specified manually, read default chain ID
 	if chainID == "" {
-		cfg, err := tcmd.ParseConfig()
-		if err == nil {
-			genesisFile := cfg.GenesisFile()
-			bz, err := ioutil.ReadFile(genesisFile)
-			if err == nil {
-				var doc tmtypes.GenesisDoc
-				err = json.Unmarshal(bz, &doc)
-				if err == nil {
-					chainID = doc.ChainID
-				}
-			}
+		def, err := defaultChainID()
+		if err != nil {
+			chainID = def
 		}
 	}
 	return core.CoreContext{
@@ -49,19 +42,39 @@ func NewCoreContextFromViper() core.CoreContext {
 	}
 }
 
-// Automatically set sequence number
-func AutoSequence(ctx core.CoreContext) (core.CoreContext, error) {
-	if !viper.IsSet(client.FlagSequence) {
-		from, err := ctx.GetFromAddress()
-		if err != nil {
-			return ctx, err
-		}
-		seq, err := ctx.NextSequence(from)
-		if err != nil {
-			return ctx, err
-		}
-		fmt.Printf("Defaulting to next sequence number: %d\n", seq)
-		ctx = ctx.WithSequence(seq)
+// read chain ID from genesis file, if present
+func defaultChainID() (string, error) {
+	cfg, err := tcmd.ParseConfig()
+	if err != nil {
+		return "", err
 	}
+	genesisFile := cfg.GenesisFile()
+	bz, err := ioutil.ReadFile(genesisFile)
+	if err != nil {
+		return "", err
+	}
+	var doc tmtypes.GenesisDoc
+	err = json.Unmarshal(bz, &doc)
+	if err != nil {
+		return "", err
+	}
+	return doc.ChainID, nil
+}
+
+// EnsureSequence - automatically set sequence number if none provided
+func EnsureSequence(ctx core.CoreContext) (core.CoreContext, error) {
+	if viper.IsSet(client.FlagSequence) {
+		return ctx, nil
+	}
+	from, err := ctx.GetFromAddress()
+	if err != nil {
+		return ctx, err
+	}
+	seq, err := ctx.NextSequence(from)
+	if err != nil {
+		return ctx, err
+	}
+	fmt.Printf("Defaulting to next sequence number: %d\n", seq)
+	ctx = ctx.WithSequence(seq)
 	return ctx, nil
 }