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	"github.com/hermeznetwork/hermez-node/synchronizer"
 12	"gopkg.in/go-playground/validator.v9"
 13)
 14
 15// Duration is a wrapper type that parses time duration from text.
 16type Duration struct {
 17	time.Duration
 18}
 19
 20// UnmarshalText unmarshalls time duration from text.
 21func (d *Duration) UnmarshalText(data []byte) error {
 22	duration, err := time.ParseDuration(string(data))
 23	if err != nil {
 24		return err
 25	}
 26	d.Duration = duration
 27	return nil
 28}
 29
 30// ServerProof is the server proof configuration data.
 31type ServerProof struct {
 32	URL string `validate:"required"`
 33}
 34
 35// Coordinator is the coordinator specific configuration.
 36type Coordinator struct {
 37	ForgerAddress     ethCommon.Address `validate:"required"`
 38	ForgeLoopInterval Duration          `validate:"required"`
 39	L2DB              struct {
 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		Name     string `validate:"required"`
 64	} `validate:"required"`
 65	Web3 struct {
 66		URL string `validate:"required"`
 67	} `validate:"required"`
 68	Synchronizer struct {
 69		SyncLoopInterval Duration                         `validate:"required"`
 70		StartBlockNum    synchronizer.ConfigStartBlockNum `validate:"required"`
 71		InitialVariables synchronizer.SCVariables         `validate:"required"`
 72	} `validate:"required"`
 73	SmartContracts struct {
 74		Rollup       ethCommon.Address `validate:"required"`
 75		Auction      ethCommon.Address `validate:"required"`
 76		WDelayer     ethCommon.Address `validate:"required"`
 77		TokenHEZ     ethCommon.Address `validate:"required"`
 78		TokenHEZName string            `validate:"required"`
 79	} `validate:"required"`
 80	EthClient struct {
 81		CallGasLimit        uint64   `validate:"required"`
 82		DeployGasLimit      uint64   `validate:"required"`
 83		GasPriceDiv         uint64   `validate:"required"`
 84		ReceiptTimeout      Duration `validate:"required"`
 85		IntervalReceiptLoop Duration `validate:"required"`
 86	} `validate:"required"`
 87}
 88
 89// Load loads a generic config.
 90func Load(path string, cfg interface{}) error {
 91	bs, err := ioutil.ReadFile(path) //nolint:gosec
 92	if err != nil {
 93		return err
 94	}
 95	cfgToml := string(bs)
 96	if _, err := toml.Decode(cfgToml, cfg); err != nil {
 97		return err
 98	}
 99	validate := validator.New()
100	if err := validate.Struct(cfg); err != nil {
101		return fmt.Errorf("error validating configuration file: %w", err)
102	}
103	return nil
104}
105
106// LoadCoordinator loads the Coordinator configuration from path.
107func LoadCoordinator(path string) (*Coordinator, error) {
108	var cfg Coordinator
109	if err := Load(path, &cfg); err != nil {
110		return nil, fmt.Errorf("error loading coordinator configuration file: %w", err)
111	}
112	return &cfg, nil
113}
114
115// LoadNode loads the Node configuration from path.
116func LoadNode(path string) (*Node, error) {
117	var cfg Node
118	if err := Load(path, &cfg); err != nil {
119		return nil, fmt.Errorf("error loading node configuration file: %w", err)
120	}
121	return &cfg, nil
122}