neo-go/pkg/config/config.go

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package config
import (
"fmt"
"io/ioutil"
"os"
"github.com/nspcc-dev/neo-go/pkg/config/netmode"
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"github.com/nspcc-dev/neo-go/pkg/core/native/nativenames"
"github.com/nspcc-dev/neo-go/pkg/rpc"
"gopkg.in/yaml.v2"
)
const userAgentFormat = "/NEO-GO:%s/"
// Version the version of the node, set at build time.
var Version string
// Config top level struct representing the config
// for the node.
type Config struct {
ProtocolConfiguration ProtocolConfiguration `yaml:"ProtocolConfiguration"`
ApplicationConfiguration ApplicationConfiguration `yaml:"ApplicationConfiguration"`
}
// GenerateUserAgent creates user agent string based on build time environment.
func (c Config) GenerateUserAgent() string {
return fmt.Sprintf(userAgentFormat, Version)
}
// Load attempts to load the config from the given
// path for the given netMode.
func Load(path string, netMode netmode.Magic) (Config, error) {
configPath := fmt.Sprintf("%s/protocol.%s.yml", path, netMode)
return LoadFile(configPath)
}
// LoadFile loads config from the provided path.
func LoadFile(configPath string) (Config, error) {
if _, err := os.Stat(configPath); os.IsNotExist(err) {
return Config{}, fmt.Errorf("config '%s' doesn't exist", configPath)
}
configData, err := ioutil.ReadFile(configPath)
if err != nil {
return Config{}, fmt.Errorf("unable to read config: %w", err)
}
config := Config{
ApplicationConfiguration: ApplicationConfiguration{
PingInterval: 30,
PingTimeout: 90,
RPC: rpc.Config{
MaxIteratorResultItems: 100,
},
},
}
err = yaml.Unmarshal(configData, &config)
if err != nil {
return Config{}, fmt.Errorf("failed to unmarshal config YAML: %w", err)
}
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for name := range config.ProtocolConfiguration.NativeUpdateHistories {
if !nativenames.IsValid(name) {
return Config{}, fmt.Errorf("NativeActivations configuration section contains unexpected native contract name: %s", name)
}
}
return config, nil
}