// It is assumed that you call this function only after rec.IsStealthIdx() was true
func CheckStealthRec(db *qdb.DB, k qdb.KeyType, rec *chain.OneWalkRecord,
addr *btc.BtcAddr, d []byte, inbrowse bool) (fl uint32, uo *chain.OneUnspentTx) {
sth_scr := rec.Script()
sa := addr.StealthAddr
if sa.CheckNonce(sth_scr[3:]) {
vo := rec.VOut() // get the spending output
var spend_v []byte
if inbrowse {
spend_v = db.GetNoMutex(qdb.KeyType(uint64(k) ^ uint64(vo) ^ uint64(vo+1)))
} else {
spend_v = db.Get(qdb.KeyType(uint64(k) ^ uint64(vo) ^ uint64(vo+1)))
}
if spend_v != nil {
rec = chain.NewWalkRecord(spend_v)
if rec.IsP2KH() {
var h160 [20]byte
c := btc.StealthDH(sth_scr[7:40], d)
spen_exp := btc.DeriveNextPublic(sa.SpendKeys[0][:], c)
btc.RimpHash(spen_exp, h160[:])
if bytes.Equal(rec.Script()[3:23], h160[:]) {
adr := btc.NewAddrFromHash160(h160[:], btc.AddrVerPubkey(common.CFG.Testnet))
uo = rec.ToUnspent(adr)
adr.StealthAddr = sa
adr.Extra = addr.Extra
uo.StealthC = c
}
} else {
fl = chain.WALK_NOMORE
}
} else {
fl = chain.WALK_NOMORE
}
}
return
}