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Differential D6195 Diff 20457 src/script/descriptor.cpp

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src/script/descriptor.cpp

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}; };
/** Base class for all Descriptor implementations. */ /** Base class for all Descriptor implementations. */
class DescriptorImpl : public Descriptor { class DescriptorImpl : public Descriptor {
//! Public key arguments for this descriptor (size 1 for PK, PKH; any size //! Public key arguments for this descriptor (size 1 for PK, PKH; any size
//! of Multisig). //! of Multisig).
const std::vector<std::unique_ptr<PubkeyProvider>> m_pubkey_args; const std::vector<std::unique_ptr<PubkeyProvider>> m_pubkey_args;
//! The sub-descriptor argument (nullptr for everything but SH). //! The sub-descriptor argument (nullptr for everything but SH).
const std::unique_ptr<Descriptor> m_script_arg; const std::unique_ptr<DescriptorImpl> m_script_arg;
//! The string name of the descriptor function. //! The string name of the descriptor function.
const std::string m_name; const std::string m_name;
protected: protected:
//! Return a serialization of anything except pubkey and script arguments, //! Return a serialization of anything except pubkey and script arguments,
//! to be prepended to those. //! to be prepended to those.
virtual std::string ToStringExtra() const { return ""; } virtual std::string ToStringExtra() const { return ""; }
Show All 13 Linesprotected:
* @return A vector with scriptPubKeys for this descriptor. * @return A vector with scriptPubKeys for this descriptor.
*/ */
virtual std::vector<CScript> virtual std::vector<CScript>
MakeScripts(const std::vector<CPubKey> &pubkeys, const CScript *script, MakeScripts(const std::vector<CPubKey> &pubkeys, const CScript *script,
FlatSigningProvider &out) const = 0; FlatSigningProvider &out) const = 0;
public: public:
DescriptorImpl(std::vector<std::unique_ptr<PubkeyProvider>> pubkeys, DescriptorImpl(std::vector<std::unique_ptr<PubkeyProvider>> pubkeys,
std::unique_ptr<Descriptor> script, const std::string &name) std::unique_ptr<DescriptorImpl> script,
const std::string &name)
: m_pubkey_args(std::move(pubkeys)), m_script_arg(std::move(script)), : m_pubkey_args(std::move(pubkeys)), m_script_arg(std::move(script)),
m_name(name) {} m_name(name) {}
bool IsSolvable() const override { bool IsSolvable() const override {
if (m_script_arg) { if (m_script_arg) {
if (!m_script_arg->IsSolvable()) { if (!m_script_arg->IsSolvable()) {
return false; return false;
} }
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protected: protected:
std::vector<CScript> MakeScripts(const std::vector<CPubKey> &, std::vector<CScript> MakeScripts(const std::vector<CPubKey> &,
const CScript *script, const CScript *script,
FlatSigningProvider &) const override { FlatSigningProvider &) const override {
return Singleton(GetScriptForDestination(CScriptID(*script))); return Singleton(GetScriptForDestination(CScriptID(*script)));
} }
public: public:
SHDescriptor(std::unique_ptr<Descriptor> desc) SHDescriptor(std::unique_ptr<DescriptorImpl> desc)
: DescriptorImpl({}, std::move(desc), "sh") {} : DescriptorImpl({}, std::move(desc), "sh") {}
}; };
//////////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////////////
// Parser // // Parser //
//////////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////////////
enum class ParseScriptContext { enum class ParseScriptContext {
▲ Show 20 Lines • Show All 167 Lines • ▼ Show 20 Linesstd::unique_ptr<PubkeyProvider> ParsePubkey(const Span<const char> &sp,
if (!provider) { if (!provider) {
return nullptr; return nullptr;
} }
return std::make_unique<OriginPubkeyProvider>(std::move(info), return std::make_unique<OriginPubkeyProvider>(std::move(info),
std::move(provider)); std::move(provider));
} }
/** Parse a script in a particular context. */ /** Parse a script in a particular context. */
std::unique_ptr<Descriptor> ParseScript(Span<const char> &sp, std::unique_ptr<DescriptorImpl> ParseScript(Span<const char> &sp,
ParseScriptContext ctx, ParseScriptContext ctx,
FlatSigningProvider &out) { FlatSigningProvider &out) {
auto expr = Expr(sp); auto expr = Expr(sp);
if (Func("pk", expr)) { if (Func("pk", expr)) {
auto pubkey = ParsePubkey(expr, out); auto pubkey = ParsePubkey(expr, out);
if (!pubkey) { if (!pubkey) {
return nullptr; return nullptr;
} }
return std::make_unique<PKDescriptor>(std::move(pubkey)); return std::make_unique<PKDescriptor>(std::move(pubkey));
} }
▲ Show 20 Lines • Show All 85 Lines • ▼ Show 20 LinesInferPubkey(const CPubKey &pubkey, ParseScriptContext,
KeyOriginInfo info; KeyOriginInfo info;
if (provider.GetKeyOrigin(pubkey.GetID(), info)) { if (provider.GetKeyOrigin(pubkey.GetID(), info)) {
return std::make_unique<OriginPubkeyProvider>(std::move(info), return std::make_unique<OriginPubkeyProvider>(std::move(info),
std::move(key_provider)); std::move(key_provider));
} }
return key_provider; return key_provider;
} }
std::unique_ptr<Descriptor> InferScript(const CScript &script, std::unique_ptr<DescriptorImpl> InferScript(const CScript &script,
ParseScriptContext ctx, ParseScriptContext ctx,
const SigningProvider &provider) { const SigningProvider &provider) {
std::vector<std::vector<uint8_t>> data; std::vector<std::vector<uint8_t>> data;
txnouttype txntype = Solver(script, data); txnouttype txntype = Solver(script, data);
if (txntype == TX_PUBKEY) { if (txntype == TX_PUBKEY) {
CPubKey pubkey(data[0].begin(), data[0].end()); CPubKey pubkey(data[0].begin(), data[0].end());
if (pubkey.IsValid()) { if (pubkey.IsValid()) {
return std::make_unique<PKDescriptor>( return std::make_unique<PKDescriptor>(
InferPubkey(pubkey, ctx, provider)); InferPubkey(pubkey, ctx, provider));
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} // namespace } // namespace
std::unique_ptr<Descriptor> Parse(const std::string &descriptor, std::unique_ptr<Descriptor> Parse(const std::string &descriptor,
FlatSigningProvider &out) { FlatSigningProvider &out) {
Span<const char> sp(descriptor.data(), descriptor.size()); Span<const char> sp(descriptor.data(), descriptor.size());
auto ret = ParseScript(sp, ParseScriptContext::TOP, out); auto ret = ParseScript(sp, ParseScriptContext::TOP, out);
if (sp.size() == 0 && ret) { if (sp.size() == 0 && ret) {
return ret; return std::unique_ptr<Descriptor>(std::move(ret));
} }
return nullptr; return nullptr;
} }
std::unique_ptr<Descriptor> InferDescriptor(const CScript &script, std::unique_ptr<Descriptor> InferDescriptor(const CScript &script,
const SigningProvider &provider) { const SigningProvider &provider) {
return InferScript(script, ParseScriptContext::TOP, provider); return InferScript(script, ParseScriptContext::TOP, provider);
} }