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Introduce DescriptorCache struct which caches xpubs

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This commit is contained in:
Andrew Chow
2020-02-24 15:09:15 -05:00
parent c3b4715923
commit 474ea3b927
2 changed files with 82 additions and 0 deletions
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39
src/script/descriptor.cpp
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@@ -1050,3 +1050,42 @@ std::unique_ptr<Descriptor> InferDescriptor(const CScript& script, const Signing
{
return InferScript(script, ParseScriptContext::TOP, provider);
}
void DescriptorCache::CacheParentExtPubKey(uint32_t key_exp_pos, const CExtPubKey& xpub)
{
m_parent_xpubs[key_exp_pos] = xpub;
}
void DescriptorCache::CacheDerivedExtPubKey(uint32_t key_exp_pos, uint32_t der_index, const CExtPubKey& xpub)
{
auto& xpubs = m_derived_xpubs[key_exp_pos];
xpubs[der_index] = xpub;
}
bool DescriptorCache::GetCachedParentExtPubKey(uint32_t key_exp_pos, CExtPubKey& xpub) const
{
const auto& it = m_parent_xpubs.find(key_exp_pos);
if (it == m_parent_xpubs.end()) return false;
xpub = it->second;
return true;
}
bool DescriptorCache::GetCachedDerivedExtPubKey(uint32_t key_exp_pos, uint32_t der_index, CExtPubKey& xpub) const
{
const auto& key_exp_it = m_derived_xpubs.find(key_exp_pos);
if (key_exp_it == m_derived_xpubs.end()) return false;
const auto& der_it = key_exp_it->second.find(der_index);
if (der_it == key_exp_it->second.end()) return false;
xpub = der_it->second;
return true;
}
const ExtPubKeyMap DescriptorCache::GetCachedParentExtPubKeys() const
{
return m_parent_xpubs;
}
const std::unordered_map<uint32_t, ExtPubKeyMap> DescriptorCache::GetCachedDerivedExtPubKeys() const
{
return m_derived_xpubs;
}