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Merge #17537: wallet: Cleanup and move opportunistic and superfluous TopUp()s

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6e77a7b65c keypool: Add comment about TopUp and when to use it (Andrew Chow)
ea50e34b28 keypool: Move opportunistic TopUps from LegacyScriptPubKeyMan to CWallet and ReserveDestination (Andrew Chow)
bb2c8ce23c keypool: Remove  superfluous topup from CWallet::GetNewChangeDestination (Andrew Chow)

Pull request description:

  * The `TopUp()` in `CWallet::GetNewChangeDestination` is unnecessary as currently m_spk_man calls TopUp further down the call stack inside LegacyScriptPubKeyMan::ReserveKeyFromKeyPool (called by LegacyScriptPubKeyMan::GetReservedDestination). This also lets us prepare for future changes with multiple ScriptPubKeyMans in the wallet.
  * An opportunistic `TopUp()` is moved from `LegacyScriptPubKeyMan::GetNewDestination` to `CWallet::GetNewDestination`.
  * Another opportunistic `TopUp()` is moved from `LegacyScriptPubKeyMan::ReserveKeyFromKeyPool`

  Moving opportunistic TopUps ensures that ScriptPubKeyMans will always be topped up before requesting Destinations from them as we cannot  always rely on future ScriptPubKeyMan implementaions topping up internally.

  See also: https://github.com/bitcoin/bitcoin/pull/17373#discussion_r348598174

ACKs for top commit:
  instagibbs:
    utACK 6e77a7b65c only change is slight elaboration on comment
  ryanofsky:
    Code review ACK 6e77a7b65c. Only the comment changed since my previous review.

Tree-SHA512: bdfc8d303842c3fb7c3d40af7abfa6d9dac4ef71a24922bb92229674ee89bfe3113ebb46d3903ac48ef99f0a7d6eaac33282495844f2b31f91b8df55084c421f
This commit is contained in:
fanquake
2019-12-17 11:50:25 -05:00
parent 890eac8f82 6e77a7b65c
commit e6acd9f72c
3 changed files with 7 additions and 5 deletions
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5
src/wallet/wallet.cpp
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@@ -3105,6 +3105,7 @@ bool CWallet::GetNewDestination(const OutputType type, const std::string label,
bool result = false;
auto spk_man = m_spk_man.get();
if (spk_man) {
spk_man->TopUp();
result = spk_man->GetNewDestination(type, dest, error);
}
if (result) {
@@ -3118,8 +3119,6 @@ bool CWallet::GetNewChangeDestination(const OutputType type, CTxDestination& des
{
error.clear();
m_spk_man->TopUp();
ReserveDestination reservedest(this, type);
if (!reservedest.GetReservedDestination(dest, true)) {
error = "Error: Keypool ran out, please call keypoolrefill first";
@@ -3297,6 +3296,8 @@ bool ReserveDestination::GetReservedDestination(CTxDestination& dest, bool inter
if (nIndex == -1)
{
m_spk_man->TopUp();
CKeyPool keypool;
if (!m_spk_man->GetReservedDestination(type, internal, address, nIndex, keypool)) {
return false;