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Opportunistically use bech32m change addresses if available

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If a transaction as a segwit output, use a bech32m change address if
they are available. If not, fallback to bech32. If bech32 change
addresses are unavailable, fallback to the default address type.
This commit is contained in:
Andrew Chow 2021-06-04 16:40:48 -04:00
parent 0262536c34
commit 699dfcd8ad
1 changed files with 7 additions and 1 deletions
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8
src/wallet/wallet.cpp
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@ -1909,7 +1909,13 @@ OutputType CWallet::TransactionChangeType(const std::optional<OutputType>& chang
int witnessversion = 0;
std::vector<unsigned char> witnessprogram;
if (recipient.scriptPubKey.IsWitnessProgram(witnessversion, witnessprogram)) {
return OutputType::BECH32;
if (GetScriptPubKeyMan(OutputType::BECH32M, true)) {
return OutputType::BECH32M;
} else if (GetScriptPubKeyMan(OutputType::BECH32, true)) {
return OutputType::BECH32;
} else {
return m_default_address_type;
}
}
}