1package config
  2
  3import (
  4	"fmt"
  5	"io/ioutil"
  6	"time"
  7
  8	"github.com/BurntSushi/toml"
  9	ethCommon "github.com/ethereum/go-ethereum/common"
 10	"gopkg.in/go-playground/validator.v9"
 11)
 12
 13// Duration is a wrapper type that parses time duration from text.
 14type Duration struct {
 15	time.Duration
 16}
 17
 18// UnmarshalText unmarshalls time duration from text.
 19func (d *Duration) UnmarshalText(data []byte) error {
 20	duration, err := time.ParseDuration(string(data))
 21	if err != nil {
 22		return err
 23	}
 24	d.Duration = duration
 25	return nil
 26}
 27
 28// Coordinator is the coordinator specific configuration.
 29type Coordinator struct {
 30	ForgerAddress     ethCommon.Address `validate:"required"`
 31	ForgeLoopInterval Duration          `validate:"required"`
 32}
 33
 34// Node is the hermez node configuration.
 35type Node struct {
 36	StateDB struct {
 37		Path string
 38	} `validate:"required"`
 39	PostgreSQL struct {
 40		Port     int    `validate:"required"`
 41		Host     string `validate:"required"`
 42		User     string `validate:"required"`
 43		Password string `validate:"required"`
 44	} `validate:"required"`
 45	L2DB struct {
 46		Name         string   `validate:"required"`
 47		SafetyPeriod uint16   `validate:"required"`
 48		MaxTxs       uint32   `validate:"required"`
 49		TTL          Duration `validate:"required"`
 50	} `validate:"required"`
 51	HistoryDB struct {
 52		Name string `validate:"required"`
 53	} `validate:"required"`
 54	Web3 struct {
 55		URL string `validate:"required"`
 56	} `validate:"required"`
 57	TxSelector struct {
 58		Path string `validate:"required"`
 59	} `validate:"required"`
 60	BatchBuilder struct {
 61		Path string `validate:"required"`
 62	} `validate:"required"`
 63	Synchronizer struct {
 64		SyncLoopInterval Duration `validate:"required"`
 65	} `validate:"required"`
 66}
 67
 68// Load loads a generic config.
 69func Load(path string, cfg interface{}) error {
 70	bs, err := ioutil.ReadFile(path) //nolint:gosec
 71	if err != nil {
 72		return err
 73	}
 74	cfgToml := string(bs)
 75	if _, err := toml.Decode(cfgToml, cfg); err != nil {
 76		return err
 77	}
 78	validate := validator.New()
 79	if err := validate.Struct(cfg); err != nil {
 80		return fmt.Errorf("error validating configuration file: %w", err)
 81	}
 82	return nil
 83}
 84
 85// LoadCoordinator loads the Coordinator configuration from path.
 86func LoadCoordinator(path string) (*Coordinator, error) {
 87	var cfg Coordinator
 88	if err := Load(path, &cfg); err != nil {
 89		return nil, fmt.Errorf("error loading coordinator configuration file: %w", err)
 90	}
 91	return &cfg, nil
 92}
 93
 94// LoadNode loads the Node configuration from path.
 95func LoadNode(path string) (*Node, error) {
 96	var cfg Node
 97	if err := Load(path, &cfg); err != nil {
 98		return nil, fmt.Errorf("error loading node configuration file: %w", err)
 99	}
100	return &cfg, nil
101}