func makeBtcUtxoWithkeys(utxos []bitcoin.Utxo, egn engine.Exchange) ([]bitcoin.UtxoWithkey, error) {
utxoks := make([]bitcoin.UtxoWithkey, len(utxos))
for i, u := range utxos {
key, err := egn.GetAddrPrivKey(bitcoin.Type, u.GetAddress())
if err != nil {
return []bitcoin.UtxoWithkey{}, err
}
utxoks[i] = bitcoin.NewUtxoWithKey(u, key)
}
return utxoks, nil
}
func createSkyWithdrawTx(egn engine.Exchange, amount uint64, toAddr string) (*SkyTxResult, error) {
uxs, err := egn.ChooseUtxos(skycoin.Type, amount, ChooseUtxoTm)
if err != nil {
return nil, err
}
utxos := uxs.([]skycoin.Utxo)
for _, u := range utxos {
logger.Debug("using skycoin utxos:%s", u.GetHash())
}
var success bool
defer func() {
if !success {
go func() { egn.PutUtxos(skycoin.Type, utxos) }()
}
}()
var totalAmounts uint64
var totalHours uint64
for _, u := range utxos {
totalAmounts += u.GetCoins()
totalHours += u.GetHours()
}
outAddrs := []skycoin.TxOut{}
chgAmt := totalAmounts - amount
chgHours := totalHours / 4
chgAddr := ""
if chgAmt > 0 {
// generate a change address
chgAddr = egn.GetNewAddress(skycoin.Type)
outAddrs = append(outAddrs,
skycoin.MakeUtxoOutput(toAddr, amount, chgHours/2),
skycoin.MakeUtxoOutput(chgAddr, chgAmt, chgHours/2))
} else {
outAddrs = append(outAddrs, skycoin.MakeUtxoOutput(toAddr, amount, chgHours/2))
}
keys := make([]cipher.SecKey, len(utxos))
for i, u := range utxos {
k, err := egn.GetAddrPrivKey(skycoin.Type, u.GetAddress())
if err != nil {
panic(err)
}
keys[i] = cipher.MustSecKeyFromHex(k)
}
logger.Debug("creating skycoin transaction...")
tx := skycoin.NewTransaction(utxos, keys, outAddrs)
if err := tx.Verify(); err != nil {
return nil, err
}
success = true
rlt := SkyTxResult{
Tx: tx,
UsingUtxos: utxos[:],
ChangeAddr: chgAddr,
}
return &rlt, nil
}
func getAddrPrivKey(ee engine.Exchange, cp string) coin.GetPrivKey {
return func(addr string) (string, error) {
return ee.GetAddrPrivKey(cp, addr)
}
}