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pubkey: introduce a GetEvenCorrespondingCPubKey helper

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We'll need to get a compressed key out of an x-only one in other places.
Avoid duplicating the code.
This commit is contained in:
Antoine Poinsot
2023-02-14 10:31:32 +01:00
parent ce8845f5dd
commit fcb6f13f44
3 changed files with 10 additions and 3 deletions
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4
src/script/descriptor.cpp
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@@ -1401,9 +1401,7 @@ std::unique_ptr<PubkeyProvider> InferPubkey(const CPubKey& pubkey, ParseScriptCo
std::unique_ptr<PubkeyProvider> InferXOnlyPubkey(const XOnlyPubKey& xkey, ParseScriptContext ctx, const SigningProvider& provider)
{
unsigned char full_key[CPubKey::COMPRESSED_SIZE] = {0x02};
std::copy(xkey.begin(), xkey.end(), full_key + 1);
CPubKey pubkey(full_key);
CPubKey pubkey{xkey.GetEvenCorrespondingCPubKey()};
std::unique_ptr<PubkeyProvider> key_provider = std::make_unique<ConstPubkeyProvider>(0, pubkey, true);
KeyOriginInfo info;
if (provider.GetKeyOriginByXOnly(xkey, info)) {