neoneo-go/pkg/config/config.go

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package config
import (
"fmt"
"os"
"time"
"github.com/nspcc-dev/neo-go/pkg/config/netmode"
"gopkg.in/yaml.v3"
)
const (
// UserAgentWrapper is a string that user agent string should be wrapped into.
UserAgentWrapper = "/"
// UserAgentPrefix is a prefix used to generate user agent string.
UserAgentPrefix = "NEO-GO:"
// UserAgentFormat is a formatted string used to generate user agent string.
UserAgentFormat = UserAgentWrapper + UserAgentPrefix + "%s" + UserAgentWrapper
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// DefaultMaxIteratorResultItems is the default upper bound of traversed
// iterator items per JSON-RPC response. It covers both session-based and
// naive iterators.
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DefaultMaxIteratorResultItems = 100
// DefaultMaxFindResultItems is the default maximum number of resulting
// contract states items that can be retrieved by `findstates` JSON-RPC handler.
DefaultMaxFindResultItems = 100
// DefaultMaxFindStorageResultItems is the default maximum number of resulting
// contract storage items that can be retrieved by `findstorge` JSON-RPC handler.
DefaultMaxFindStorageResultItems = 50
// DefaultMaxNEP11Tokens is the default maximum number of resulting NEP11 tokens
// that can be traversed by `getnep11balances` JSON-RPC handler.
DefaultMaxNEP11Tokens = 100
)
// Version is the version of the node, set at the 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 a user agent string based on the build time environment.
func (c Config) GenerateUserAgent() string {
return fmt.Sprintf(UserAgentFormat, Version)
}
// Blockchain generates a Blockchain configuration based on Protocol and
// Application settings.
func (c Config) Blockchain() Blockchain {
return Blockchain{
ProtocolConfiguration: c.ProtocolConfiguration,
Ledger: c.ApplicationConfiguration.Ledger,
}
}
// 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. It also applies backwards compatibility
// fixups if necessary.
func LoadFile(configPath string) (Config, error) {
if _, err := os.Stat(configPath); os.IsNotExist(err) {
return Config{}, fmt.Errorf("config '%s' doesn't exist", configPath)
}
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configData, err := os.ReadFile(configPath)
if err != nil {
return Config{}, fmt.Errorf("unable to read config: %w", err)
}
config := Config{
ApplicationConfiguration: ApplicationConfiguration{
P2P: P2P{
PingInterval: 30 * time.Second,
PingTimeout: 90 * time.Second,
},
},
}
err = yaml.Unmarshal(configData, &config)
if err != nil {
return Config{}, fmt.Errorf("failed to unmarshal config YAML: %w", err)
}
err = config.ProtocolConfiguration.Validate()
if err != nil {
return Config{}, err
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}
return config, nil
}