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	"github.com/hermeznetwork/hermez-node/common"
 11	"gopkg.in/go-playground/validator.v9"
 12)
 13
 14// Duration is a wrapper type that parses time duration from text.
 15type Duration struct {
 16	time.Duration
 17}
 18
 19// UnmarshalText unmarshalls time duration from text.
 20func (d *Duration) UnmarshalText(data []byte) error {
 21	duration, err := time.ParseDuration(string(data))
 22	if err != nil {
 23		return err
 24	}
 25	d.Duration = duration
 26	return nil
 27}
 28
 29// ServerProof is the server proof configuration data.
 30type ServerProof struct {
 31	URL string `validate:"required"`
 32}
 33
 34// Coordinator is the coordinator specific configuration.
 35type Coordinator struct {
 36	ForgerAddress     ethCommon.Address `validate:"required"`
 37	ForgeLoopInterval Duration          `validate:"required"`
 38	L2DB              struct {
 39		Name         string          `validate:"required"`
 40		SafetyPeriod common.BatchNum `validate:"required"`
 41		MaxTxs       uint32          `validate:"required"`
 42		TTL          Duration        `validate:"required"`
 43	} `validate:"required"`
 44	TxSelector struct {
 45		Path string `validate:"required"`
 46	} `validate:"required"`
 47	BatchBuilder struct {
 48		Path string `validate:"required"`
 49	} `validate:"required"`
 50	ServerProofs []ServerProof `validate:"required"`
 51}
 52
 53// Node is the hermez node configuration.
 54type Node struct {
 55	StateDB struct {
 56		Path string
 57	} `validate:"required"`
 58	PostgreSQL struct {
 59		Port     int    `validate:"required"`
 60		Host     string `validate:"required"`
 61		User     string `validate:"required"`
 62		Password string `validate:"required"`
 63	} `validate:"required"`
 64	HistoryDB struct {
 65		Name string `validate:"required"`
 66	} `validate:"required"`
 67	Web3 struct {
 68		URL string `validate:"required"`
 69	} `validate:"required"`
 70	Synchronizer struct {
 71		SyncLoopInterval Duration `validate:"required"`
 72	} `validate:"required"`
 73}
 74
 75// Load loads a generic config.
 76func Load(path string, cfg interface{}) error {
 77	bs, err := ioutil.ReadFile(path) //nolint:gosec
 78	if err != nil {
 79		return err
 80	}
 81	cfgToml := string(bs)
 82	if _, err := toml.Decode(cfgToml, cfg); err != nil {
 83		return err
 84	}
 85	validate := validator.New()
 86	if err := validate.Struct(cfg); err != nil {
 87		return fmt.Errorf("error validating configuration file: %w", err)
 88	}
 89	return nil
 90}
 91
 92// LoadCoordinator loads the Coordinator configuration from path.
 93func LoadCoordinator(path string) (*Coordinator, error) {
 94	var cfg Coordinator
 95	if err := Load(path, &cfg); err != nil {
 96		return nil, fmt.Errorf("error loading coordinator configuration file: %w", err)
 97	}
 98	return &cfg, nil
 99}
100
101// LoadNode loads the Node configuration from path.
102func LoadNode(path string) (*Node, error) {
103	var cfg Node
104	if err := Load(path, &cfg); err != nil {
105		return nil, fmt.Errorf("error loading node configuration file: %w", err)
106	}
107	return &cfg, nil
108}