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script/signingprovider: introduce a MultiSigningProvider

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It is sometimes useful to interface with multiple signing providers at
once. For instance when inferring a descriptor with solving information
being provided from multiple sources (see next commit).

Instead of inneficiently copying the information from one provider into
the other, introduce a new signing provider that takes a list of
pointers to existing providers.
This commit is contained in:
Antoine Poinsot
2023-05-15 18:57:41 +02:00
parent fa7c46b503
commit 8d870a9873
2 changed files with 70 additions and 0 deletions
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55
src/script/signingprovider.cpp
View File

@ -225,6 +225,61 @@ CKeyID GetKeyForDestination(const SigningProvider& store, const CTxDestination&
} }
return CKeyID(); return CKeyID();
} }
void MultiSigningProvider::AddProvider(std::unique_ptr<SigningProvider> provider)
{
m_providers.push_back(std::move(provider));
}
bool MultiSigningProvider::GetCScript(const CScriptID& scriptid, CScript& script) const
{
for (const auto& provider: m_providers) {
if (provider->GetCScript(scriptid, script)) return true;
}
return false;
}
bool MultiSigningProvider::GetPubKey(const CKeyID& keyid, CPubKey& pubkey) const
{
for (const auto& provider: m_providers) {
if (provider->GetPubKey(keyid, pubkey)) return true;
}
return false;
}
bool MultiSigningProvider::GetKeyOrigin(const CKeyID& keyid, KeyOriginInfo& info) const
{
for (const auto& provider: m_providers) {
if (provider->GetKeyOrigin(keyid, info)) return true;
}
return false;
}
bool MultiSigningProvider::GetKey(const CKeyID& keyid, CKey& key) const
{
for (const auto& provider: m_providers) {
if (provider->GetKey(keyid, key)) return true;
}
return false;
}
bool MultiSigningProvider::GetTaprootSpendData(const XOnlyPubKey& output_key, TaprootSpendData& spenddata) const
{
for (const auto& provider: m_providers) {
if (provider->GetTaprootSpendData(output_key, spenddata)) return true;
}
return false;
}
bool MultiSigningProvider::GetTaprootBuilder(const XOnlyPubKey& output_key, TaprootBuilder& builder) const
{
for (const auto& provider: m_providers) {
if (provider->GetTaprootBuilder(output_key, builder)) return true;
}
return false;
}
/*static*/ TaprootBuilder::NodeInfo TaprootBuilder::Combine(NodeInfo&& a, NodeInfo&& b) /*static*/ TaprootBuilder::NodeInfo TaprootBuilder::Combine(NodeInfo&& a, NodeInfo&& b)
{ {
NodeInfo ret; NodeInfo ret;

15
src/script/signingprovider.h
View File

@ -298,4 +298,19 @@ public:
/** Return the CKeyID of the key involved in a script (if there is a unique one). */ /** Return the CKeyID of the key involved in a script (if there is a unique one). */
CKeyID GetKeyForDestination(const SigningProvider& store, const CTxDestination& dest); CKeyID GetKeyForDestination(const SigningProvider& store, const CTxDestination& dest);
/** A signing provider to be used to interface with multiple signing providers at once. */
class MultiSigningProvider: public SigningProvider {
std::vector<std::unique_ptr<SigningProvider>> m_providers;
public:
void AddProvider(std::unique_ptr<SigningProvider> provider);
bool GetCScript(const CScriptID& scriptid, CScript& script) const override;
bool GetPubKey(const CKeyID& keyid, CPubKey& pubkey) const override;
bool GetKeyOrigin(const CKeyID& keyid, KeyOriginInfo& info) const override;
bool GetKey(const CKeyID& keyid, CKey& key) const override;
bool GetTaprootSpendData(const XOnlyPubKey& output_key, TaprootSpendData& spenddata) const override;
bool GetTaprootBuilder(const XOnlyPubKey& output_key, TaprootBuilder& builder) const override;
};
#endif // BITCOIN_SCRIPT_SIGNINGPROVIDER_H #endif // BITCOIN_SCRIPT_SIGNINGPROVIDER_H