cli: add embadded node config

If config-path not pass then defualt configs is used according to set
network. in case of VM cli the default privnet config and InMemory db is
used.

Close #3450

Signed-off-by: Ekaterina Pavlova <ekt@morphbits.io>

cli/options/options.go

@@ -16,8 +16,10 @@ import (
 
 	"github.com/nspcc-dev/neo-go/cli/flags"
 	"github.com/nspcc-dev/neo-go/cli/input"
+	configFiles "github.com/nspcc-dev/neo-go/config"
 	"github.com/nspcc-dev/neo-go/pkg/config"
 	"github.com/nspcc-dev/neo-go/pkg/config/netmode"
+	"github.com/nspcc-dev/neo-go/pkg/core/storage/dbconfig"
 	"github.com/nspcc-dev/neo-go/pkg/core/transaction"
 	"github.com/nspcc-dev/neo-go/pkg/encoding/address"
 	"github.com/nspcc-dev/neo-go/pkg/io"
@@ -194,6 +196,10 @@ func GetRPCWithInvoker(gctx context.Context, ctx *cli.Context, signers []transac
 // GetConfigFromContext looks at the path and the mode flags in the given config and
 // returns an appropriate config.
 func GetConfigFromContext(ctx *cli.Context) (config.Config, error) {
+	if ctx.NumFlags() == 0 {
+		return getDefaultVMConfig()
+	}
+
 	var (
 		configFile   = ctx.String("config-file")
 		relativePath = ctx.String("relative-path")
@@ -205,7 +211,43 @@ func GetConfigFromContext(ctx *cli.Context) (config.Config, error) {
 	if argCp := ctx.String("config-path"); argCp != "" {
 		configPath = argCp
 	}
-	return config.Load(configPath, GetNetwork(ctx), relativePath)
+
+	network := GetNetwork(ctx)
+	switch network {
+	case netmode.MainNet:
+		return getEmbeddedConfig(configFiles.MainnetConfig)
+	case netmode.TestNet:
+		return getEmbeddedConfig(configFiles.TestnetConfig)
+	case netmode.UnitTestNet:
+		return getEmbeddedConfig(configFiles.UnitTestnetConfig)
+	case netmode.PrivNet:
+		return getEmbeddedConfig(configFiles.PrivnetConfig)
+	default:
+		return config.Load(configPath, network, relativePath)
+	}
+}
+
+// getDefaultVMConfig returns the default VM config
+func getDefaultVMConfig() (config.Config, error) {
+	var cfgData = configFiles.PrivnetConfig
+
+	var cfg config.Config
+	err := yaml.Unmarshal(cfgData, &cfg)
+	if err != nil {
+		return cfg, fmt.Errorf("failed to unmarshal default config: %w", err)
+	}
+	cfg.ApplicationConfiguration.DBConfiguration.Type = dbconfig.InMemoryDB
+	return cfg, nil
+}
+
+// getEmbeddedConfig returns the embedded configuration based on the provided data
+func getEmbeddedConfig(cfgData []byte) (config.Config, error) {
+	var cfg config.Config
+	err := yaml.Unmarshal(cfgData, &cfg)
+	if err != nil {
+		return cfg, fmt.Errorf("failed to unmarshal embedded config: %w", err)
+	}
+	return cfg, nil
 }
 
 var (

config/config_embed.go

@@ -0,0 +1,19 @@
+package config
+
+import (
+	_ "embed"
+)
+
+// Embedding configuration files
+//
+//go:embed protocol.mainnet.yml
+var MainnetConfig []byte
+
+//go:embed protocol.testnet.yml
+var TestnetConfig []byte
+
+//go:embed protocol.unit_testnet.yml
+var UnitTestnetConfig []byte
+
+//go:embed protocol.privnet.yml
+var PrivnetConfig []byte