Merge pull request #3708 from nspcc-dev/rpcwrapper

cli: add check config field for `generate-rpcwrapper`

cli/smartcontract/generate.go

@@ -1,6 +1,7 @@
 package smartcontract
 
 import (
+	"bytes"
 	"fmt"
 	"os"
 	"strings"
@@ -17,7 +18,8 @@ var generatorFlags = []cli.Flag{
 	&cli.StringFlag{
 		Name:    "config",
 		Aliases: []string{"c"},
-		Usage:   "Configuration file to use",
+		Usage: `Configuration bindings file to use (*.yml). Configuration file is
+	generated by 'contract compile' command with --bindings flag`,
 	},
 	&cli.StringFlag{
 		Name:     "manifest",
@@ -95,7 +97,10 @@ func contractGenerateSomething(ctx *cli.Context, cb func(binding.Config) error)
 		if err != nil {
 			return cli.Exit(fmt.Errorf("can't read config file: %w", err), 1)
 		}
-		err = yaml.Unmarshal(bs, &cfg)
+		decoder := yaml.NewDecoder(bytes.NewReader(bs))
+		decoder.KnownFields(true)
+
+		err = decoder.Decode(&cfg)
 		if err != nil {
 			return cli.Exit(fmt.Errorf("can't parse config file: %w", err), 1)
 		}