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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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16
src/key_io.cpp
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@@ -67,16 +67,18 @@ public:
std::string operator()(const WitnessUnknown& id) const
{
if (id.version < 1 || id.version > 16 || id.length < 2 || id.length > 40) {
const std::vector<unsigned char>& program = id.GetWitnessProgram();
if (id.GetWitnessVersion() < 1 || id.GetWitnessVersion() > 16 || program.size() < 2 || program.size() > 40) {
return {};
}
std::vector<unsigned char> data = {(unsigned char)id.version};
data.reserve(1 + (id.length * 8 + 4) / 5);
ConvertBits<8, 5, true>([&](unsigned char c) { data.push_back(c); }, id.program, id.program + id.length);
std::vector<unsigned char> data = {(unsigned char)id.GetWitnessVersion()};
data.reserve(1 + (program.size() * 8 + 4) / 5);
ConvertBits<8, 5, true>([&](unsigned char c) { data.push_back(c); }, program.begin(), program.end());
return bech32::Encode(bech32::Encoding::BECH32M, m_params.Bech32HRP(), data);
}
std::string operator()(const CNoDestination& no) const { return {}; }
std::string operator()(const PubKeyDestination& pk) const { return {}; }
};
CTxDestination DecodeDestination(const std::string& str, const CChainParams& params, std::string& error_str, std::vector<int>* error_locations)
@@ -189,11 +191,7 @@ CTxDestination DecodeDestination(const std::string& str, const CChainParams& par
return CNoDestination();
}
WitnessUnknown unk;
unk.version = version;
std::copy(data.begin(), data.end(), unk.program);
unk.length = data.size();
return unk;
return WitnessUnknown{version, data};
} else {
error_str = strprintf("Invalid padding in Bech32 data section");
return CNoDestination();