After migration and salvaging wallet, it returned the same addresses, presumably in the same order, my bet that's bug is related to key pool queue, it's developer job to determinate exact cause, I'm not going to look through every step to find exact line of code which cause this. My time isn't free and I'm not going to waste it on this, thanks. If someone has better explanation why it was happened and why addresses were reused, you can post your version of events.
Address generation is
deterministic on purpose. That is a
feature added to BTC wallets long ago. If you generate address #X from a new private key, it will always be the same address.
Holy smokes, dude. If you are going to review something, know your business.
[edit]
This is how you can take an old backup of a wallet and recover new transactions that produce their own change addresses.
I'm not talking about address generation, I said that the same address has been reused despite it had been used in transaction and shouldn't exist in the queue. Read carefully next time.
Addresses are taken from the keypool. The keypool caches addresses from a deterministic generator. They re-generated the same keypool twice, probably by using their trading database to construct new transactions before the chain was fully synced.
Case closed.
+1 very logical and same simple explanation . I think that should accept now.
This assumes a lot, sorry but it does. Do you know this without a shadow of a doubt "They re-generated the same keypool twice, probably by using their trading database to construct new transactions before the chain was fully synced." Because you really don't know thats how it worked.
For ExD is this the piece of code you were looking for?
bool CWallet::GetKeyFromPool(CPubKey& result)
{
int64_t nIndex = 0;
CKeyPool keypool;
{
LOCK(cs_wallet);
ReserveKeyFromKeyPool(nIndex, keypool);
if (nIndex == -1)
{
if (IsLocked()) return false;
result = GenerateNewKey();
return true;
}
KeepKey(nIndex);
result = keypool.vchPubKey;
}
return true;
}
в ssd вcтaвлeнo:
bool CWallet::GetKeyFromPool(CPubKey& result, bool fAllowReuse)
{
int64 nIndex = 0;
CKeyPool keypool;
{
LOCK(cs_wallet);
ReserveKeyFromKeyPool(nIndex, keypool);
if (nIndex == -1)
{
if (fAllowReuse && vchDefaultKey.IsValid())
{
result = vchDefaultKey;
return true;
}
if (IsLocked()) return false;
result = GenerateNewKey();
return true;
}
KeepKey(nIndex);
result = keypool.vchPubKey;
}
return true;