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-rw-r--r--src/rpc/blockchain.cpp9
-rw-r--r--src/script/descriptor.cpp86
-rw-r--r--src/script/descriptor.h21
-rw-r--r--src/script/sign.h5
-rw-r--r--src/test/descriptor_tests.cpp12
-rw-r--r--src/wallet/rpcwallet.cpp13
6 files changed, 144 insertions, 2 deletions
diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
index e3d9357358..403e3e397c 100644
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -2187,6 +2187,7 @@ UniValue scantxoutset(const JSONRPCRequest& request)
" \"txid\" : \"transactionid\", (string) The transaction id\n"
" \"vout\": n, (numeric) the vout value\n"
" \"scriptPubKey\" : \"script\", (string) the script key\n"
+ " \"desc\" : \"descriptor\", (string) A specialized descriptor for the matched scriptPubKey\n"
" \"amount\" : x.xxx, (numeric) The total amount in " + CURRENCY_UNIT + " of the unspent output\n"
" \"height\" : n, (numeric) Height of the unspent transaction output\n"
" }\n"
@@ -2221,6 +2222,7 @@ UniValue scantxoutset(const JSONRPCRequest& request)
throw JSONRPCError(RPC_INVALID_PARAMETER, "Scan already in progress, use action \"abort\" or \"status\"");
}
std::set<CScript> needles;
+ std::map<CScript, std::string> descriptors;
CAmount total_in = 0;
// loop through the scan objects
@@ -2253,7 +2255,11 @@ UniValue scantxoutset(const JSONRPCRequest& request)
if (!desc->Expand(i, provider, scripts, provider)) {
throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, strprintf("Cannot derive script without private keys: '%s'", desc_str));
}
- needles.insert(scripts.begin(), scripts.end());
+ for (const auto& script : scripts) {
+ std::string inferred = InferDescriptor(script, provider)->ToString();
+ needles.emplace(script);
+ descriptors.emplace(std::move(script), std::move(inferred));
+ }
}
}
@@ -2286,6 +2292,7 @@ UniValue scantxoutset(const JSONRPCRequest& request)
unspent.pushKV("txid", outpoint.hash.GetHex());
unspent.pushKV("vout", (int32_t)outpoint.n);
unspent.pushKV("scriptPubKey", HexStr(txo.scriptPubKey.begin(), txo.scriptPubKey.end()));
+ unspent.pushKV("desc", descriptors[txo.scriptPubKey]);
unspent.pushKV("amount", ValueFromAmount(txo.nValue));
unspent.pushKV("height", (int32_t)coin.nHeight);
diff --git a/src/script/descriptor.cpp b/src/script/descriptor.cpp
index d343972c40..ca80d3451f 100644
--- a/src/script/descriptor.cpp
+++ b/src/script/descriptor.cpp
@@ -211,6 +211,7 @@ public:
AddressDescriptor(CTxDestination destination) : m_destination(std::move(destination)) {}
bool IsRange() const override { return false; }
+ bool IsSolvable() const override { return false; }
std::string ToString() const override { return "addr(" + EncodeDestination(m_destination) + ")"; }
bool ToPrivateString(const SigningProvider& arg, std::string& out) const override { out = ToString(); return true; }
bool Expand(int pos, const SigningProvider& arg, std::vector<CScript>& output_scripts, FlatSigningProvider& out) const override
@@ -229,6 +230,7 @@ public:
RawDescriptor(CScript script) : m_script(std::move(script)) {}
bool IsRange() const override { return false; }
+ bool IsSolvable() const override { return false; }
std::string ToString() const override { return "raw(" + HexStr(m_script.begin(), m_script.end()) + ")"; }
bool ToPrivateString(const SigningProvider& arg, std::string& out) const override { out = ToString(); return true; }
bool Expand(int pos, const SigningProvider& arg, std::vector<CScript>& output_scripts, FlatSigningProvider& out) const override
@@ -249,6 +251,7 @@ public:
SingleKeyDescriptor(std::unique_ptr<PubkeyProvider> prov, const std::function<CScript(const CPubKey&)>& fn, const std::string& name) : m_script_fn(fn), m_fn_name(name), m_provider(std::move(prov)) {}
bool IsRange() const override { return m_provider->IsRange(); }
+ bool IsSolvable() const override { return true; }
std::string ToString() const override { return m_fn_name + "(" + m_provider->ToString() + ")"; }
bool ToPrivateString(const SigningProvider& arg, std::string& out) const override
{
@@ -290,6 +293,8 @@ public:
return false;
}
+ bool IsSolvable() const override { return true; }
+
std::string ToString() const override
{
std::string ret = strprintf("multi(%i", m_threshold);
@@ -343,6 +348,7 @@ public:
ConvertorDescriptor(std::unique_ptr<Descriptor> descriptor, const std::function<CScript(const CScript&)>& fn, const std::string& name) : m_convert_fn(fn), m_fn_name(name), m_descriptor(std::move(descriptor)) {}
bool IsRange() const override { return m_descriptor->IsRange(); }
+ bool IsSolvable() const override { return m_descriptor->IsSolvable(); }
std::string ToString() const override { return m_fn_name + "(" + m_descriptor->ToString() + ")"; }
bool ToPrivateString(const SigningProvider& arg, std::string& out) const override
{
@@ -377,6 +383,7 @@ public:
ComboDescriptor(std::unique_ptr<PubkeyProvider> provider) : m_provider(std::move(provider)) {}
bool IsRange() const override { return m_provider->IsRange(); }
+ bool IsSolvable() const override { return true; }
std::string ToString() const override { return "combo(" + m_provider->ToString() + ")"; }
bool ToPrivateString(const SigningProvider& arg, std::string& out) const override
{
@@ -625,6 +632,80 @@ std::unique_ptr<Descriptor> ParseScript(Span<const char>& sp, ParseScriptContext
return nullptr;
}
+std::unique_ptr<PubkeyProvider> InferPubkey(const CPubKey& pubkey, ParseScriptContext, const SigningProvider& provider)
+{
+ std::unique_ptr<PubkeyProvider> key_provider = MakeUnique<ConstPubkeyProvider>(pubkey);
+ KeyOriginInfo info;
+ if (provider.GetKeyOrigin(pubkey.GetID(), info)) {
+ return MakeUnique<OriginPubkeyProvider>(std::move(info), std::move(key_provider));
+ }
+ return key_provider;
+}
+
+std::unique_ptr<Descriptor> InferScript(const CScript& script, ParseScriptContext ctx, const SigningProvider& provider)
+{
+ std::vector<std::vector<unsigned char>> data;
+ txnouttype txntype = Solver(script, data);
+
+ if (txntype == TX_PUBKEY) {
+ CPubKey pubkey(data[0].begin(), data[0].end());
+ if (pubkey.IsValid()) {
+ return MakeUnique<SingleKeyDescriptor>(InferPubkey(pubkey, ctx, provider), P2PKGetScript, "pk");
+ }
+ }
+ if (txntype == TX_PUBKEYHASH) {
+ uint160 hash(data[0]);
+ CKeyID keyid(hash);
+ CPubKey pubkey;
+ if (provider.GetPubKey(keyid, pubkey)) {
+ return MakeUnique<SingleKeyDescriptor>(InferPubkey(pubkey, ctx, provider), P2PKHGetScript, "pkh");
+ }
+ }
+ if (txntype == TX_WITNESS_V0_KEYHASH && ctx != ParseScriptContext::P2WSH) {
+ uint160 hash(data[0]);
+ CKeyID keyid(hash);
+ CPubKey pubkey;
+ if (provider.GetPubKey(keyid, pubkey)) {
+ return MakeUnique<SingleKeyDescriptor>(InferPubkey(pubkey, ctx, provider), P2WPKHGetScript, "wpkh");
+ }
+ }
+ if (txntype == TX_MULTISIG) {
+ std::vector<std::unique_ptr<PubkeyProvider>> providers;
+ for (size_t i = 1; i + 1 < data.size(); ++i) {
+ CPubKey pubkey(data[i].begin(), data[i].end());
+ providers.push_back(InferPubkey(pubkey, ctx, provider));
+ }
+ return MakeUnique<MultisigDescriptor>((int)data[0][0], std::move(providers));
+ }
+ if (txntype == TX_SCRIPTHASH && ctx == ParseScriptContext::TOP) {
+ uint160 hash(data[0]);
+ CScriptID scriptid(hash);
+ CScript subscript;
+ if (provider.GetCScript(scriptid, subscript)) {
+ auto sub = InferScript(subscript, ParseScriptContext::P2SH, provider);
+ if (sub) return MakeUnique<ConvertorDescriptor>(std::move(sub), ConvertP2SH, "sh");
+ }
+ }
+ if (txntype == TX_WITNESS_V0_SCRIPTHASH && ctx != ParseScriptContext::P2WSH) {
+ CScriptID scriptid;
+ CRIPEMD160().Write(data[0].data(), data[0].size()).Finalize(scriptid.begin());
+ CScript subscript;
+ if (provider.GetCScript(scriptid, subscript)) {
+ auto sub = InferScript(subscript, ParseScriptContext::P2WSH, provider);
+ if (sub) return MakeUnique<ConvertorDescriptor>(std::move(sub), ConvertP2WSH, "wsh");
+ }
+ }
+
+ CTxDestination dest;
+ if (ExtractDestination(script, dest)) {
+ if (GetScriptForDestination(dest) == script) {
+ return MakeUnique<AddressDescriptor>(std::move(dest));
+ }
+ }
+
+ return MakeUnique<RawDescriptor>(script);
+}
+
} // namespace
std::unique_ptr<Descriptor> Parse(const std::string& descriptor, FlatSigningProvider& out)
@@ -634,3 +715,8 @@ std::unique_ptr<Descriptor> Parse(const std::string& descriptor, FlatSigningProv
if (sp.size() == 0 && ret) return ret;
return nullptr;
}
+
+std::unique_ptr<Descriptor> InferDescriptor(const CScript& script, const SigningProvider& provider)
+{
+ return InferScript(script, ParseScriptContext::TOP, provider);
+}
diff --git a/src/script/descriptor.h b/src/script/descriptor.h
index 87e07369c7..0111972f85 100644
--- a/src/script/descriptor.h
+++ b/src/script/descriptor.h
@@ -32,6 +32,10 @@ struct Descriptor {
/** Whether the expansion of this descriptor depends on the position. */
virtual bool IsRange() const = 0;
+ /** Whether this descriptor has all information about signing ignoring lack of private keys.
+ * This is true for all descriptors except ones that use `raw` or `addr` constructions. */
+ virtual bool IsSolvable() const = 0;
+
/** Convert the descriptor back to a string, undoing parsing. */
virtual std::string ToString() const = 0;
@@ -51,5 +55,20 @@ struct Descriptor {
/** Parse a descriptor string. Included private keys are put in out. Returns nullptr if parsing fails. */
std::unique_ptr<Descriptor> Parse(const std::string& descriptor, FlatSigningProvider& out);
-#endif // BITCOIN_SCRIPT_DESCRIPTOR_H
+/** Find a descriptor for the specified script, using information from provider where possible.
+ *
+ * A non-ranged descriptor which only generates the specified script will be returned in all
+ * circumstances.
+ *
+ * For public keys with key origin information, this information will be preserved in the returned
+ * descriptor.
+ *
+ * - If all information for solving `script` is present in `provider`, a descriptor will be returned
+ * which is `IsSolvable()` and encapsulates said information.
+ * - Failing that, if `script` corresponds to a known address type, an "addr()" descriptor will be
+ * returned (which is not `IsSolvable()`).
+ * - Failing that, a "raw()" descriptor is returned.
+ */
+std::unique_ptr<Descriptor> InferDescriptor(const CScript& script, const SigningProvider& provider);
+#endif // BITCOIN_SCRIPT_DESCRIPTOR_H
diff --git a/src/script/sign.h b/src/script/sign.h
index a478f49789..20c7203b26 100644
--- a/src/script/sign.h
+++ b/src/script/sign.h
@@ -24,6 +24,11 @@ struct KeyOriginInfo
{
unsigned char fingerprint[4];
std::vector<uint32_t> path;
+
+ friend bool operator==(const KeyOriginInfo& a, const KeyOriginInfo& b)
+ {
+ return std::equal(std::begin(a.fingerprint), std::end(a.fingerprint), std::begin(b.fingerprint)) && a.path == b.path;
+ }
};
/** An interface to be implemented by keystores that support signing. */
diff --git a/src/test/descriptor_tests.cpp b/src/test/descriptor_tests.cpp
index e1ef619313..0e98f5a826 100644
--- a/src/test/descriptor_tests.cpp
+++ b/src/test/descriptor_tests.cpp
@@ -102,7 +102,19 @@ void Check(const std::string& prv, const std::string& pub, int flags, const std:
spend.vout.resize(1);
BOOST_CHECK_MESSAGE(SignSignature(Merge(keys_priv, script_provider), spks[n], spend, 0, 1, SIGHASH_ALL), prv);
}
+
+ /* Infer a descriptor from the generated script, and verify its solvability and that it roundtrips. */
+ auto inferred = InferDescriptor(spks[n], script_provider);
+ BOOST_CHECK_EQUAL(inferred->IsSolvable(), !(flags & UNSOLVABLE));
+ std::vector<CScript> spks_inferred;
+ FlatSigningProvider provider_inferred;
+ BOOST_CHECK(inferred->Expand(0, provider_inferred, spks_inferred, provider_inferred));
+ BOOST_CHECK_EQUAL(spks_inferred.size(), 1);
+ BOOST_CHECK(spks_inferred[0] == spks[n]);
+ BOOST_CHECK_EQUAL(IsSolvable(provider_inferred, spks_inferred[0]), !(flags & UNSOLVABLE));
+ BOOST_CHECK(provider_inferred.origins == script_provider.origins);
}
+
// Test whether the observed key path is present in the 'paths' variable (which contains expected, unobserved paths),
// and then remove it from that set.
for (const auto& origin : script_provider.origins) {
diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp
index d4806b4c6b..b4c21631ab 100644
--- a/src/wallet/rpcwallet.cpp
+++ b/src/wallet/rpcwallet.cpp
@@ -22,6 +22,7 @@
#include <rpc/rawtransaction.h>
#include <rpc/server.h>
#include <rpc/util.h>
+#include <script/descriptor.h>
#include <script/sign.h>
#include <shutdown.h>
#include <timedata.h>
@@ -2845,6 +2846,7 @@ static UniValue listunspent(const JSONRPCRequest& request)
" \"redeemScript\" : n (string) The redeemScript if scriptPubKey is P2SH\n"
" \"spendable\" : xxx, (bool) Whether we have the private keys to spend this output\n"
" \"solvable\" : xxx, (bool) Whether we know how to spend this output, ignoring the lack of keys\n"
+ " \"desc\" : xxx, (string, only when solvable) A descriptor for spending this output\n"
" \"safe\" : xxx (bool) Whether this output is considered safe to spend. Unconfirmed transactions\n"
" from outside keys and unconfirmed replacement transactions are considered unsafe\n"
" and are not eligible for spending by fundrawtransaction and sendtoaddress.\n"
@@ -2963,6 +2965,10 @@ static UniValue listunspent(const JSONRPCRequest& request)
entry.pushKV("confirmations", out.nDepth);
entry.pushKV("spendable", out.fSpendable);
entry.pushKV("solvable", out.fSolvable);
+ if (out.fSolvable) {
+ auto descriptor = InferDescriptor(scriptPubKey, *pwallet);
+ entry.pushKV("desc", descriptor->ToString());
+ }
entry.pushKV("safe", out.fSafe);
results.push_back(entry);
}
@@ -3749,6 +3755,8 @@ UniValue getaddressinfo(const JSONRPCRequest& request)
" \"ismine\" : true|false, (boolean) If the address is yours or not\n"
" \"solvable\" : true|false, (boolean) If the address is solvable by the wallet\n"
" \"iswatchonly\" : true|false, (boolean) If the address is watchonly\n"
+ " \"solvable\" : true|false, (boolean) Whether we know how to spend coins sent to this address, ignoring the possible lack of private keys\n"
+ " \"desc\" : \"desc\", (string, optional) A descriptor for spending coins sent to this address (only when solvable)\n"
" \"isscript\" : true|false, (boolean) If the key is a script\n"
" \"ischange\" : true|false, (boolean) If the address was used for change output\n"
" \"iswitness\" : true|false, (boolean) If the address is a witness address\n"
@@ -3802,6 +3810,11 @@ UniValue getaddressinfo(const JSONRPCRequest& request)
isminetype mine = IsMine(*pwallet, dest);
ret.pushKV("ismine", bool(mine & ISMINE_SPENDABLE));
+ bool solvable = IsSolvable(*pwallet, scriptPubKey);
+ ret.pushKV("solvable", solvable);
+ if (solvable) {
+ ret.pushKV("desc", InferDescriptor(scriptPubKey, *pwallet)->ToString());
+ }
ret.pushKV("iswatchonly", bool(mine & ISMINE_WATCH_ONLY));
ret.pushKV("solvable", IsSolvable(*pwallet, scriptPubKey));
UniValue detail = DescribeWalletAddress(pwallet, dest);
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-10 14:11:04 +0000