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Remove support for subdescriptors expanding to multiple scripts

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This commit is contained in:
Pieter Wuille 2021-03-11 18:58:27 -08:00
parent 1c7be9ab90
commit 84f3939ece
1 changed files with 5 additions and 9 deletions
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14
src/script/descriptor.cpp
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@ -484,6 +484,7 @@ protected:
//! The sub-descriptor argument (nullptr for everything but SH and WSH).
//! In doc/descriptors.m this is referred to as SCRIPT expressions sh(SCRIPT)
//! and wsh(SCRIPT), and distinct from KEY expressions and ADDR expressions.
//! Subdescriptors can only ever generate a single script.
const std::unique_ptr<DescriptorImpl> m_subdescriptor_arg;
//! Return a serialization of anything except pubkey and script arguments, to be prepended to those.
@ -491,8 +492,7 @@ protected:
/** A helper function to construct the scripts for this descriptor.
*
* This function is invoked once for every CScript produced by evaluating
* m_subdescriptor_arg, or just once in case m_subdescriptor_arg is nullptr.
* This function is invoked once by ExpandHelper.
* @param pubkeys The evaluations of the m_pubkey_args field.
* @param script The evaluation of m_subdescriptor_arg (or nullptr when m_subdescriptor_arg is nullptr).
@ -586,6 +586,7 @@ public:
if (m_subdescriptor_arg) {
FlatSigningProvider subprovider;
if (!m_subdescriptor_arg->ExpandHelper(pos, arg, read_cache, subscripts, subprovider, write_cache)) return false;
assert(subscripts.size() == 1);
out = Merge(out, subprovider);
}
@ -596,13 +597,8 @@ public:
out.origins.emplace(entry.first.GetID(), std::make_pair<CPubKey, KeyOriginInfo>(CPubKey(entry.first), std::move(entry.second)));
}
if (m_subdescriptor_arg) {
for (const auto& subscript : subscripts) {
out.scripts.emplace(CScriptID(subscript), subscript);
std::vector<CScript> addscripts = MakeScripts(pubkeys, &subscript, out);
for (auto& addscript : addscripts) {
output_scripts.push_back(std::move(addscript));
}
}
out.scripts.emplace(CScriptID(subscripts[0]), subscripts[0]);
output_scripts = MakeScripts(pubkeys, &subscripts[0], out);
} else {
output_scripts = MakeScripts(pubkeys, nullptr, out);
}