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Merge bitcoin/bitcoin#28246: wallet: Use CTxDestination in CRecipient instead of just scriptPubKey

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ad0c469d98 wallet: Use CTxDestination in CRecipient rather than scriptPubKey (Andrew Chow)
07d3bdf4eb Add PubKeyDestination for P2PK scripts (Andrew Chow)
1a98a51c66 Allow CNoDestination to represent a raw script (Andrew Chow)
8dd067088d Make WitnessUnknown members private (Andrew Chow)

Pull request description:

  For silent payments, we want to provide a `SilentPaymentsDestination` to be used as the recipient, which requires `CRecipient` to use something other than just the `scriptPubKey` as we cannot know the output script for a silent payment prior to transaction creation. `CTxDestination` seems like the obvious place to add a `SilentPaymentsDestination` as it is our internal representation of an address.

  In order to still allow paying to arbitrary scriptPubKeys (e.g. for data carrier outputs, or the user hand crafted a raw transaction that they have given to `fundrawtransaction`), `CNoDestination` is changed to contain raw scripts.

  Additionally, P2PK scripts are now interpreted as a new `PubKeyDestination` rather than `PKHash`. This results in some things that would have given an address for P2PK scripts to no longer do so. This is arguably more correct.

  `ExtractDestination`'s behavior is slightly changed for the above. It now returns `true` for those destinations that have addresses, so P2PK scripts now result in `false`. Even though it returns false for `CNoDestination`, the script will now be included in that `CNoDestination`.

  Builds on #28244

ACKs for top commit:
  josibake:
    ACK ad0c469d98

Tree-SHA512: ef3f8f3c7284779d9806c77c85b21caf910a79a1f7e7f1b51abcc0d7e074f14e00abf30f625a13075e41d94dad6202c10ddff462c0ee74c2ca4aab585b145a52
This commit is contained in:
fanquake
2023-09-19 16:30:09 +00:00
parent 737aac8cc8 ad0c469d98
commit 53313c49d6
19 changed files with 160 additions and 90 deletions
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17
src/wallet/spend.cpp
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@@ -505,8 +505,15 @@ std::map<CTxDestination, std::vector<COutput>> ListCoins(const CWallet& wallet)
coins_params.skip_locked = false;
for (const COutput& coin : AvailableCoins(wallet, &coin_control, /*feerate=*/std::nullopt, coins_params).All()) {
CTxDestination address;
if ((coin.spendable || (wallet.IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS) && coin.solvable)) &&
ExtractDestination(FindNonChangeParentOutput(wallet, coin.outpoint).scriptPubKey, address)) {
if ((coin.spendable || (wallet.IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS) && coin.solvable))) {
if (!ExtractDestination(FindNonChangeParentOutput(wallet, coin.outpoint).scriptPubKey, address)) {
// For backwards compatibility, we convert P2PK output scripts into PKHash destinations
if (auto pk_dest = std::get_if<PubKeyDestination>(&address)) {
address = PKHash(pk_dest->GetPubKey());
} else {
continue;
}
}
result[address].emplace_back(coin);
}
}
@@ -1071,7 +1078,7 @@ static util::Result<CreatedTransactionResult> CreateTransactionInternal(
// vouts to the payees
for (const auto& recipient : vecSend)
{
CTxOut txout(recipient.nAmount, recipient.scriptPubKey);
CTxOut txout(recipient.nAmount, GetScriptForDestination(recipient.dest));
// Include the fee cost for outputs.
coin_selection_params.tx_noinputs_size += ::GetSerializeSize(txout, PROTOCOL_VERSION);
@@ -1319,7 +1326,9 @@ bool FundTransaction(CWallet& wallet, CMutableTransaction& tx, CAmount& nFeeRet,
// Turn the txout set into a CRecipient vector.
for (size_t idx = 0; idx < tx.vout.size(); idx++) {
const CTxOut& txOut = tx.vout[idx];
CRecipient recipient = {txOut.scriptPubKey, txOut.nValue, setSubtractFeeFromOutputs.count(idx) == 1};
CTxDestination dest;
ExtractDestination(txOut.scriptPubKey, dest);
CRecipient recipient = {dest, txOut.nValue, setSubtractFeeFromOutputs.count(idx) == 1};
vecSend.push_back(recipient);
}