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daemon.go
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daemon.go
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package daemon
import (
"context"
"errors"
"github.com/setavenger/blindbitd/pb"
"github.com/setavenger/blindbitd/src"
"github.com/setavenger/blindbitd/src/database"
"github.com/setavenger/blindbitd/src/logging"
"github.com/setavenger/blindbitd/src/networking"
"github.com/setavenger/blindbitd/src/utils"
"github.com/setavenger/go-electrum/electrum"
)
type Daemon struct {
Status pb.Status
Password []byte
Locked bool
ReadyChan chan struct{} // for the startup signal; either unlocking or setting password on initial startup
ShutdownChan chan struct{}
Mnemonic string
ClientElectrum *electrum.Client
ClientBlindBit *networking.ClientBlindBit
Wallet *src.Wallet
NewBlockChan <-chan *electrum.SubscribeHeadersResult
TriggerRescanChan chan uint64
}
func NewDaemon(wallet *src.Wallet, clientBlindBit *networking.ClientBlindBit, clientElectrum *electrum.Client) (*Daemon, error) {
var channel <-chan *electrum.SubscribeHeadersResult
var err error
if src.UseElectrum {
channel, err = clientElectrum.SubscribeHeaders(context.Background())
if err != nil {
logging.ErrorLogger.Println(err)
return nil, err
}
}
daemon := Daemon{
Status: pb.Status_STATUS_UNSPECIFIED,
Wallet: wallet,
ClientBlindBit: clientBlindBit,
ClientElectrum: clientElectrum,
Locked: true,
ReadyChan: make(chan struct{}),
ShutdownChan: make(chan struct{}),
NewBlockChan: channel,
TriggerRescanChan: make(chan uint64),
}
return &daemon, nil
}
func (d *Daemon) Run() error {
d.Status = pb.Status_STATUS_RUNNING
// first we sync up and then we scan continuously
err := d.SyncToTip(0)
if err != nil {
logging.ErrorLogger.Println(err)
return err
}
logging.InfoLogger.Println("Balance:", d.Wallet.FreeBalance())
// todo add a recovery mechanism
err = d.ContinuousScan() // blocking function if it returns, it returns an error and Run is closed as well
return err
}
var exampleLabelComments = [5]string{"Hello", "Donations for project", "Family and Friends", "Deal 1", "Deal 2"}
// LoadDataFromDB
// Load keys and wallet data from disk
func (d *Daemon) LoadDataFromDB() error {
var keys src.Keys
d.Status = pb.Status_STATUS_STARTING
err := database.ReadFromDB(src.PathToKeys, &keys, d.Password)
if err != nil {
logging.ErrorLogger.Println(err)
return err
}
var wallet src.Wallet
d.Mnemonic = keys.Mnemonic
// load keys in any case other data will be read in next step if available
wallet.LoadKeys(keys.ScanSecretKey, keys.SpendSecretKey)
err = wallet.CheckAndInitialiseFields()
if err != nil {
logging.ErrorLogger.Println(err)
return err
}
if utils.CheckIfFileExists(src.PathDbWallet) {
err = database.ReadFromDB(src.PathDbWallet, &wallet, d.Password)
if err != nil {
logging.ErrorLogger.Println(err)
return err
}
}
d.Wallet = &wallet
return nil
}
func (d *Daemon) Shutdown() error {
// todo save all data to a files
logging.InfoLogger.Println("Process shutting down")
if d.ClientElectrum != nil {
d.ClientElectrum.Shutdown()
}
if d.Status == pb.Status_STATUS_NO_WALLET {
// we don't store anything if the wallet was not initialised yet
return nil
}
if d.Locked || d.Password == nil {
return nil
}
err := database.WriteToDB(src.PathDbWallet, d.Wallet, d.Password)
if err != nil {
logging.ErrorLogger.Println(err)
return err
}
return nil
}
// CreateNewKeys
// WARNING: Must only be called if no other wallet is present. Will overwrite the old keys.
func (d *Daemon) CreateNewKeys(seedPassphrase string) error {
var chainTip uint64
chainTip, err := d.ClientBlindBit.GetChainTip()
if err != nil {
logging.ErrorLogger.Println(err)
return err
}
d.Wallet = src.NewWallet(chainTip)
var newKeys *src.Keys
newKeys, err = src.CreateNewKeys(seedPassphrase)
if err != nil {
logging.ErrorLogger.Println(err)
return err
}
d.Wallet.LoadKeys(newKeys.ScanSecretKey, newKeys.SpendSecretKey)
if newKeys.Mnemonic == "" {
return errors.New("mnemonic is empty")
}
d.Mnemonic = newKeys.Mnemonic
if d.Locked || d.Password == nil {
return errors.New("daemon is locked or has no encryption password")
}
err = database.WriteToDB(src.PathToKeys, newKeys, d.Password)
if err != nil {
logging.ErrorLogger.Println(err)
return err
}
// setup up the other important stuff needed
err = d.Wallet.CheckAndInitialiseFields()
if err != nil {
logging.ErrorLogger.Println(err)
return err
}
_, err = d.Wallet.GenerateAddress()
if err != nil {
logging.ErrorLogger.Println(err)
return err
}
return nil
}
func (d *Daemon) RecoverFromSeed(mnemonic, seedPassphrase string, birthHeight uint64) error {
d.Wallet = src.NewWallet(birthHeight)
newKeys, err := src.KeysFromMnemonic(mnemonic, seedPassphrase)
if err != nil {
logging.ErrorLogger.Println(err)
return err
}
d.Wallet.LoadKeys(newKeys.ScanSecretKey, newKeys.SpendSecretKey)
if newKeys.Mnemonic == "" {
return errors.New("mnemonic is empty")
}
d.Mnemonic = newKeys.Mnemonic
if d.Locked || d.Password == nil {
return errors.New("daemon is locked or has no encryption password")
}
err = database.WriteToDB(src.PathToKeys, newKeys, d.Password)
if err != nil {
logging.ErrorLogger.Println(err)
return err
}
// setup up the other important stuff needed
err = d.Wallet.CheckAndInitialiseFields()
if err != nil {
logging.ErrorLogger.Println(err)
return err
}
_, err = d.Wallet.GenerateAddress()
if err != nil {
logging.ErrorLogger.Println(err)
return err
}
return err
}