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|
// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2018 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <script/sign.h>
#include <key.h>
#include <policy/policy.h>
#include <primitives/transaction.h>
#include <script/standard.h>
#include <uint256.h>
typedef std::vector<unsigned char> valtype;
MutableTransactionSignatureCreator::MutableTransactionSignatureCreator(const CMutableTransaction* txToIn, unsigned int nInIn, const CAmount& amountIn, int nHashTypeIn) : txTo(txToIn), nIn(nInIn), nHashType(nHashTypeIn), amount(amountIn), checker(txTo, nIn, amountIn) {}
bool MutableTransactionSignatureCreator::CreateSig(const SigningProvider& provider, std::vector<unsigned char>& vchSig, const CKeyID& address, const CScript& scriptCode, SigVersion sigversion) const
{
CKey key;
if (!provider.GetKey(address, key))
return false;
// Signing with uncompressed keys is disabled in witness scripts
if (sigversion == SigVersion::WITNESS_V0 && !key.IsCompressed())
return false;
uint256 hash = SignatureHash(scriptCode, *txTo, nIn, nHashType, amount, sigversion);
if (!key.Sign(hash, vchSig))
return false;
vchSig.push_back((unsigned char)nHashType);
return true;
}
static bool GetCScript(const SigningProvider& provider, const SignatureData& sigdata, const CScriptID& scriptid, CScript& script)
{
if (provider.GetCScript(scriptid, script)) {
return true;
}
// Look for scripts in SignatureData
if (CScriptID(sigdata.redeem_script) == scriptid) {
script = sigdata.redeem_script;
return true;
} else if (CScriptID(sigdata.witness_script) == scriptid) {
script = sigdata.witness_script;
return true;
}
return false;
}
static bool GetPubKey(const SigningProvider& provider, const SignatureData& sigdata, const CKeyID& address, CPubKey& pubkey)
{
// Look for pubkey in all partial sigs
const auto it = sigdata.signatures.find(address);
if (it != sigdata.signatures.end()) {
pubkey = it->second.first;
return true;
}
// Look for pubkey in pubkey list
const auto& pk_it = sigdata.misc_pubkeys.find(address);
if (pk_it != sigdata.misc_pubkeys.end()) {
pubkey = pk_it->second.first;
return true;
}
// Query the underlying provider
return provider.GetPubKey(address, pubkey);
}
static bool CreateSig(const BaseSignatureCreator& creator, SignatureData& sigdata, const SigningProvider& provider, std::vector<unsigned char>& sig_out, const CPubKey& pubkey, const CScript& scriptcode, SigVersion sigversion)
{
CKeyID keyid = pubkey.GetID();
const auto it = sigdata.signatures.find(keyid);
if (it != sigdata.signatures.end()) {
sig_out = it->second.second;
return true;
}
KeyOriginInfo info;
if (provider.GetKeyOrigin(keyid, info)) {
sigdata.misc_pubkeys.emplace(keyid, std::make_pair(pubkey, std::move(info)));
}
if (creator.CreateSig(provider, sig_out, keyid, scriptcode, sigversion)) {
auto i = sigdata.signatures.emplace(keyid, SigPair(pubkey, sig_out));
assert(i.second);
return true;
}
return false;
}
/**
* Sign scriptPubKey using signature made with creator.
* Signatures are returned in scriptSigRet (or returns false if scriptPubKey can't be signed),
* unless whichTypeRet is TX_SCRIPTHASH, in which case scriptSigRet is the redemption script.
* Returns false if scriptPubKey could not be completely satisfied.
*/
static bool SignStep(const SigningProvider& provider, const BaseSignatureCreator& creator, const CScript& scriptPubKey,
std::vector<valtype>& ret, txnouttype& whichTypeRet, SigVersion sigversion, SignatureData& sigdata)
{
CScript scriptRet;
uint160 h160;
ret.clear();
std::vector<unsigned char> sig;
std::vector<valtype> vSolutions;
whichTypeRet = Solver(scriptPubKey, vSolutions);
switch (whichTypeRet)
{
case TX_NONSTANDARD:
case TX_NULL_DATA:
case TX_WITNESS_UNKNOWN:
return false;
case TX_PUBKEY:
if (!CreateSig(creator, sigdata, provider, sig, CPubKey(vSolutions[0]), scriptPubKey, sigversion)) return false;
ret.push_back(std::move(sig));
return true;
case TX_PUBKEYHASH: {
CKeyID keyID = CKeyID(uint160(vSolutions[0]));
CPubKey pubkey;
GetPubKey(provider, sigdata, keyID, pubkey);
if (!CreateSig(creator, sigdata, provider, sig, pubkey, scriptPubKey, sigversion)) return false;
ret.push_back(std::move(sig));
ret.push_back(ToByteVector(pubkey));
return true;
}
case TX_SCRIPTHASH:
if (GetCScript(provider, sigdata, uint160(vSolutions[0]), scriptRet)) {
ret.push_back(std::vector<unsigned char>(scriptRet.begin(), scriptRet.end()));
return true;
}
return false;
case TX_MULTISIG: {
size_t required = vSolutions.front()[0];
ret.push_back(valtype()); // workaround CHECKMULTISIG bug
for (size_t i = 1; i < vSolutions.size() - 1; ++i) {
CPubKey pubkey = CPubKey(vSolutions[i]);
if (ret.size() < required + 1 && CreateSig(creator, sigdata, provider, sig, pubkey, scriptPubKey, sigversion)) {
ret.push_back(std::move(sig));
}
}
bool ok = ret.size() == required + 1;
for (size_t i = 0; i + ret.size() < required + 1; ++i) {
ret.push_back(valtype());
}
return ok;
}
case TX_WITNESS_V0_KEYHASH:
ret.push_back(vSolutions[0]);
return true;
case TX_WITNESS_V0_SCRIPTHASH:
CRIPEMD160().Write(&vSolutions[0][0], vSolutions[0].size()).Finalize(h160.begin());
if (GetCScript(provider, sigdata, h160, scriptRet)) {
ret.push_back(std::vector<unsigned char>(scriptRet.begin(), scriptRet.end()));
return true;
}
return false;
default:
return false;
}
}
static CScript PushAll(const std::vector<valtype>& values)
{
CScript result;
for (const valtype& v : values) {
if (v.size() == 0) {
result << OP_0;
} else if (v.size() == 1 && v[0] >= 1 && v[0] <= 16) {
result << CScript::EncodeOP_N(v[0]);
} else {
result << v;
}
}
return result;
}
bool ProduceSignature(const SigningProvider& provider, const BaseSignatureCreator& creator, const CScript& fromPubKey, SignatureData& sigdata)
{
if (sigdata.complete) return true;
std::vector<valtype> result;
txnouttype whichType;
bool solved = SignStep(provider, creator, fromPubKey, result, whichType, SigVersion::BASE, sigdata);
bool P2SH = false;
CScript subscript;
sigdata.scriptWitness.stack.clear();
if (solved && whichType == TX_SCRIPTHASH)
{
// Solver returns the subscript that needs to be evaluated;
// the final scriptSig is the signatures from that
// and then the serialized subscript:
subscript = CScript(result[0].begin(), result[0].end());
sigdata.redeem_script = subscript;
solved = solved && SignStep(provider, creator, subscript, result, whichType, SigVersion::BASE, sigdata) && whichType != TX_SCRIPTHASH;
P2SH = true;
}
if (solved && whichType == TX_WITNESS_V0_KEYHASH)
{
CScript witnessscript;
witnessscript << OP_DUP << OP_HASH160 << ToByteVector(result[0]) << OP_EQUALVERIFY << OP_CHECKSIG;
txnouttype subType;
solved = solved && SignStep(provider, creator, witnessscript, result, subType, SigVersion::WITNESS_V0, sigdata);
sigdata.scriptWitness.stack = result;
sigdata.witness = true;
result.clear();
}
else if (solved && whichType == TX_WITNESS_V0_SCRIPTHASH)
{
CScript witnessscript(result[0].begin(), result[0].end());
sigdata.witness_script = witnessscript;
txnouttype subType;
solved = solved && SignStep(provider, creator, witnessscript, result, subType, SigVersion::WITNESS_V0, sigdata) && subType != TX_SCRIPTHASH && subType != TX_WITNESS_V0_SCRIPTHASH && subType != TX_WITNESS_V0_KEYHASH;
result.push_back(std::vector<unsigned char>(witnessscript.begin(), witnessscript.end()));
sigdata.scriptWitness.stack = result;
sigdata.witness = true;
result.clear();
} else if (solved && whichType == TX_WITNESS_UNKNOWN) {
sigdata.witness = true;
}
if (P2SH) {
result.push_back(std::vector<unsigned char>(subscript.begin(), subscript.end()));
}
sigdata.scriptSig = PushAll(result);
// Test solution
sigdata.complete = solved && VerifyScript(sigdata.scriptSig, fromPubKey, &sigdata.scriptWitness, STANDARD_SCRIPT_VERIFY_FLAGS, creator.Checker());
return sigdata.complete;
}
bool SignPSBTInput(const SigningProvider& provider, const CMutableTransaction& tx, PSBTInput& input, int index, int sighash)
{
// if this input has a final scriptsig or scriptwitness, don't do anything with it
if (!input.final_script_sig.empty() || !input.final_script_witness.IsNull()) {
return true;
}
// Fill SignatureData with input info
SignatureData sigdata;
input.FillSignatureData(sigdata);
// Get UTXO
bool require_witness_sig = false;
CTxOut utxo;
if (input.non_witness_utxo) {
// If we're taking our information from a non-witness UTXO, verify that it matches the prevout.
if (input.non_witness_utxo->GetHash() != tx.vin[index].prevout.hash) return false;
// If both witness and non-witness UTXO are provided, verify that they match. This check shouldn't
// matter, as the PSBT deserializer enforces only one of both is provided, and the only way both
// can be present is when they're added simultaneously by FillPSBT (in which case they always match).
// Still, check in order to not rely on callers to enforce this.
if (!input.witness_utxo.IsNull() && input.non_witness_utxo->vout[tx.vin[index].prevout.n] != input.witness_utxo) return false;
utxo = input.non_witness_utxo->vout[tx.vin[index].prevout.n];
} else if (!input.witness_utxo.IsNull()) {
utxo = input.witness_utxo;
// When we're taking our information from a witness UTXO, we can't verify it is actually data from
// the output being spent. This is safe in case a witness signature is produced (which includes this
// information directly in the hash), but not for non-witness signatures. Remember that we require
// a witness signature in this situation.
require_witness_sig = true;
} else {
return false;
}
MutableTransactionSignatureCreator creator(&tx, index, utxo.nValue, sighash);
sigdata.witness = false;
bool sig_complete = ProduceSignature(provider, creator, utxo.scriptPubKey, sigdata);
// Verify that a witness signature was produced in case one was required.
if (require_witness_sig && !sigdata.witness) return false;
input.FromSignatureData(sigdata);
if (sigdata.witness) {
assert(!utxo.IsNull());
input.witness_utxo = utxo;
}
// If both UTXO types are present, drop the unnecessary one.
if (input.non_witness_utxo && !input.witness_utxo.IsNull()) {
if (sigdata.witness) {
input.non_witness_utxo = nullptr;
} else {
input.witness_utxo.SetNull();
}
}
return sig_complete;
}
class SignatureExtractorChecker final : public BaseSignatureChecker
{
private:
SignatureData& sigdata;
BaseSignatureChecker& checker;
public:
SignatureExtractorChecker(SignatureData& sigdata, BaseSignatureChecker& checker) : sigdata(sigdata), checker(checker) {}
bool CheckSig(const std::vector<unsigned char>& scriptSig, const std::vector<unsigned char>& vchPubKey, const CScript& scriptCode, SigVersion sigversion) const override;
};
bool SignatureExtractorChecker::CheckSig(const std::vector<unsigned char>& scriptSig, const std::vector<unsigned char>& vchPubKey, const CScript& scriptCode, SigVersion sigversion) const
{
if (checker.CheckSig(scriptSig, vchPubKey, scriptCode, sigversion)) {
CPubKey pubkey(vchPubKey);
sigdata.signatures.emplace(pubkey.GetID(), SigPair(pubkey, scriptSig));
return true;
}
return false;
}
namespace
{
struct Stacks
{
std::vector<valtype> script;
std::vector<valtype> witness;
Stacks() = delete;
Stacks(const Stacks&) = delete;
explicit Stacks(const SignatureData& data) : witness(data.scriptWitness.stack) {
EvalScript(script, data.scriptSig, SCRIPT_VERIFY_STRICTENC, BaseSignatureChecker(), SigVersion::BASE);
}
};
}
// Extracts signatures and scripts from incomplete scriptSigs. Please do not extend this, use PSBT instead
SignatureData DataFromTransaction(const CMutableTransaction& tx, unsigned int nIn, const CTxOut& txout)
{
SignatureData data;
assert(tx.vin.size() > nIn);
data.scriptSig = tx.vin[nIn].scriptSig;
data.scriptWitness = tx.vin[nIn].scriptWitness;
Stacks stack(data);
// Get signatures
MutableTransactionSignatureChecker tx_checker(&tx, nIn, txout.nValue);
SignatureExtractorChecker extractor_checker(data, tx_checker);
if (VerifyScript(data.scriptSig, txout.scriptPubKey, &data.scriptWitness, STANDARD_SCRIPT_VERIFY_FLAGS, extractor_checker)) {
data.complete = true;
return data;
}
// Get scripts
std::vector<std::vector<unsigned char>> solutions;
txnouttype script_type = Solver(txout.scriptPubKey, solutions);
SigVersion sigversion = SigVersion::BASE;
CScript next_script = txout.scriptPubKey;
if (script_type == TX_SCRIPTHASH && !stack.script.empty() && !stack.script.back().empty()) {
// Get the redeemScript
CScript redeem_script(stack.script.back().begin(), stack.script.back().end());
data.redeem_script = redeem_script;
next_script = std::move(redeem_script);
// Get redeemScript type
script_type = Solver(next_script, solutions);
stack.script.pop_back();
}
if (script_type == TX_WITNESS_V0_SCRIPTHASH && !stack.witness.empty() && !stack.witness.back().empty()) {
// Get the witnessScript
CScript witness_script(stack.witness.back().begin(), stack.witness.back().end());
data.witness_script = witness_script;
next_script = std::move(witness_script);
// Get witnessScript type
script_type = Solver(next_script, solutions);
stack.witness.pop_back();
stack.script = std::move(stack.witness);
stack.witness.clear();
sigversion = SigVersion::WITNESS_V0;
}
if (script_type == TX_MULTISIG && !stack.script.empty()) {
// Build a map of pubkey -> signature by matching sigs to pubkeys:
assert(solutions.size() > 1);
unsigned int num_pubkeys = solutions.size()-2;
unsigned int last_success_key = 0;
for (const valtype& sig : stack.script) {
for (unsigned int i = last_success_key; i < num_pubkeys; ++i) {
const valtype& pubkey = solutions[i+1];
// We either have a signature for this pubkey, or we have found a signature and it is valid
if (data.signatures.count(CPubKey(pubkey).GetID()) || extractor_checker.CheckSig(sig, pubkey, next_script, sigversion)) {
last_success_key = i + 1;
break;
}
}
}
}
return data;
}
void UpdateInput(CTxIn& input, const SignatureData& data)
{
input.scriptSig = data.scriptSig;
input.scriptWitness = data.scriptWitness;
}
void SignatureData::MergeSignatureData(SignatureData sigdata)
{
if (complete) return;
if (sigdata.complete) {
*this = std::move(sigdata);
return;
}
if (redeem_script.empty() && !sigdata.redeem_script.empty()) {
redeem_script = sigdata.redeem_script;
}
if (witness_script.empty() && !sigdata.witness_script.empty()) {
witness_script = sigdata.witness_script;
}
signatures.insert(std::make_move_iterator(sigdata.signatures.begin()), std::make_move_iterator(sigdata.signatures.end()));
}
bool SignSignature(const SigningProvider &provider, const CScript& fromPubKey, CMutableTransaction& txTo, unsigned int nIn, const CAmount& amount, int nHashType)
{
assert(nIn < txTo.vin.size());
MutableTransactionSignatureCreator creator(&txTo, nIn, amount, nHashType);
SignatureData sigdata;
bool ret = ProduceSignature(provider, creator, fromPubKey, sigdata);
UpdateInput(txTo.vin.at(nIn), sigdata);
return ret;
}
bool SignSignature(const SigningProvider &provider, const CTransaction& txFrom, CMutableTransaction& txTo, unsigned int nIn, int nHashType)
{
assert(nIn < txTo.vin.size());
CTxIn& txin = txTo.vin[nIn];
assert(txin.prevout.n < txFrom.vout.size());
const CTxOut& txout = txFrom.vout[txin.prevout.n];
return SignSignature(provider, txout.scriptPubKey, txTo, nIn, txout.nValue, nHashType);
}
namespace {
/** Dummy signature checker which accepts all signatures. */
class DummySignatureChecker final : public BaseSignatureChecker
{
public:
DummySignatureChecker() {}
bool CheckSig(const std::vector<unsigned char>& scriptSig, const std::vector<unsigned char>& vchPubKey, const CScript& scriptCode, SigVersion sigversion) const override { return true; }
};
const DummySignatureChecker DUMMY_CHECKER;
class DummySignatureCreator final : public BaseSignatureCreator {
private:
char m_r_len = 32;
char m_s_len = 32;
public:
DummySignatureCreator(char r_len, char s_len) : m_r_len(r_len), m_s_len(s_len) {}
const BaseSignatureChecker& Checker() const override { return DUMMY_CHECKER; }
bool CreateSig(const SigningProvider& provider, std::vector<unsigned char>& vchSig, const CKeyID& keyid, const CScript& scriptCode, SigVersion sigversion) const override
{
// Create a dummy signature that is a valid DER-encoding
vchSig.assign(m_r_len + m_s_len + 7, '\000');
vchSig[0] = 0x30;
vchSig[1] = m_r_len + m_s_len + 4;
vchSig[2] = 0x02;
vchSig[3] = m_r_len;
vchSig[4] = 0x01;
vchSig[4 + m_r_len] = 0x02;
vchSig[5 + m_r_len] = m_s_len;
vchSig[6 + m_r_len] = 0x01;
vchSig[6 + m_r_len + m_s_len] = SIGHASH_ALL;
return true;
}
};
template<typename M, typename K, typename V>
bool LookupHelper(const M& map, const K& key, V& value)
{
auto it = map.find(key);
if (it != map.end()) {
value = it->second;
return true;
}
return false;
}
}
const BaseSignatureCreator& DUMMY_SIGNATURE_CREATOR = DummySignatureCreator(32, 32);
const BaseSignatureCreator& DUMMY_MAXIMUM_SIGNATURE_CREATOR = DummySignatureCreator(33, 32);
const SigningProvider& DUMMY_SIGNING_PROVIDER = SigningProvider();
bool IsSolvable(const SigningProvider& provider, const CScript& script)
{
// This check is to make sure that the script we created can actually be solved for and signed by us
// if we were to have the private keys. This is just to make sure that the script is valid and that,
// if found in a transaction, we would still accept and relay that transaction. In particular,
// it will reject witness outputs that require signing with an uncompressed public key.
SignatureData sigs;
// Make sure that STANDARD_SCRIPT_VERIFY_FLAGS includes SCRIPT_VERIFY_WITNESS_PUBKEYTYPE, the most
// important property this function is designed to test for.
static_assert(STANDARD_SCRIPT_VERIFY_FLAGS & SCRIPT_VERIFY_WITNESS_PUBKEYTYPE, "IsSolvable requires standard script flags to include WITNESS_PUBKEYTYPE");
if (ProduceSignature(provider, DUMMY_SIGNATURE_CREATOR, script, sigs)) {
// VerifyScript check is just defensive, and should never fail.
bool verified = VerifyScript(sigs.scriptSig, script, &sigs.scriptWitness, STANDARD_SCRIPT_VERIFY_FLAGS, DUMMY_CHECKER);
assert(verified);
return true;
}
return false;
}
bool PartiallySignedTransaction::IsNull() const
{
return !tx && inputs.empty() && outputs.empty() && unknown.empty();
}
void PartiallySignedTransaction::Merge(const PartiallySignedTransaction& psbt)
{
for (unsigned int i = 0; i < inputs.size(); ++i) {
inputs[i].Merge(psbt.inputs[i]);
}
for (unsigned int i = 0; i < outputs.size(); ++i) {
outputs[i].Merge(psbt.outputs[i]);
}
unknown.insert(psbt.unknown.begin(), psbt.unknown.end());
}
bool PartiallySignedTransaction::IsSane() const
{
for (PSBTInput input : inputs) {
if (!input.IsSane()) return false;
}
return true;
}
bool PSBTInput::IsNull() const
{
return !non_witness_utxo && witness_utxo.IsNull() && partial_sigs.empty() && unknown.empty() && hd_keypaths.empty() && redeem_script.empty() && witness_script.empty();
}
void PSBTInput::FillSignatureData(SignatureData& sigdata) const
{
if (!final_script_sig.empty()) {
sigdata.scriptSig = final_script_sig;
sigdata.complete = true;
}
if (!final_script_witness.IsNull()) {
sigdata.scriptWitness = final_script_witness;
sigdata.complete = true;
}
if (sigdata.complete) {
return;
}
sigdata.signatures.insert(partial_sigs.begin(), partial_sigs.end());
if (!redeem_script.empty()) {
sigdata.redeem_script = redeem_script;
}
if (!witness_script.empty()) {
sigdata.witness_script = witness_script;
}
for (const auto& key_pair : hd_keypaths) {
sigdata.misc_pubkeys.emplace(key_pair.first.GetID(), key_pair);
}
}
void PSBTInput::FromSignatureData(const SignatureData& sigdata)
{
if (sigdata.complete) {
partial_sigs.clear();
hd_keypaths.clear();
redeem_script.clear();
witness_script.clear();
if (!sigdata.scriptSig.empty()) {
final_script_sig = sigdata.scriptSig;
}
if (!sigdata.scriptWitness.IsNull()) {
final_script_witness = sigdata.scriptWitness;
}
return;
}
partial_sigs.insert(sigdata.signatures.begin(), sigdata.signatures.end());
if (redeem_script.empty() && !sigdata.redeem_script.empty()) {
redeem_script = sigdata.redeem_script;
}
if (witness_script.empty() && !sigdata.witness_script.empty()) {
witness_script = sigdata.witness_script;
}
for (const auto& entry : sigdata.misc_pubkeys) {
hd_keypaths.emplace(entry.second);
}
}
void PSBTInput::Merge(const PSBTInput& input)
{
if (!non_witness_utxo && input.non_witness_utxo) non_witness_utxo = input.non_witness_utxo;
if (witness_utxo.IsNull() && !input.witness_utxo.IsNull()) {
witness_utxo = input.witness_utxo;
non_witness_utxo = nullptr; // Clear out any non-witness utxo when we set a witness one.
}
partial_sigs.insert(input.partial_sigs.begin(), input.partial_sigs.end());
hd_keypaths.insert(input.hd_keypaths.begin(), input.hd_keypaths.end());
unknown.insert(input.unknown.begin(), input.unknown.end());
if (redeem_script.empty() && !input.redeem_script.empty()) redeem_script = input.redeem_script;
if (witness_script.empty() && !input.witness_script.empty()) witness_script = input.witness_script;
if (final_script_sig.empty() && !input.final_script_sig.empty()) final_script_sig = input.final_script_sig;
if (final_script_witness.IsNull() && !input.final_script_witness.IsNull()) final_script_witness = input.final_script_witness;
}
bool PSBTInput::IsSane() const
{
// Cannot have both witness and non-witness utxos
if (!witness_utxo.IsNull() && non_witness_utxo) return false;
// If we have a witness_script or a scriptWitness, we must also have a witness utxo
if (!witness_script.empty() && witness_utxo.IsNull()) return false;
if (!final_script_witness.IsNull() && witness_utxo.IsNull()) return false;
return true;
}
void PSBTOutput::FillSignatureData(SignatureData& sigdata) const
{
if (!redeem_script.empty()) {
sigdata.redeem_script = redeem_script;
}
if (!witness_script.empty()) {
sigdata.witness_script = witness_script;
}
for (const auto& key_pair : hd_keypaths) {
sigdata.misc_pubkeys.emplace(key_pair.first.GetID(), key_pair);
}
}
void PSBTOutput::FromSignatureData(const SignatureData& sigdata)
{
if (redeem_script.empty() && !sigdata.redeem_script.empty()) {
redeem_script = sigdata.redeem_script;
}
if (witness_script.empty() && !sigdata.witness_script.empty()) {
witness_script = sigdata.witness_script;
}
for (const auto& entry : sigdata.misc_pubkeys) {
hd_keypaths.emplace(entry.second);
}
}
bool PSBTOutput::IsNull() const
{
return redeem_script.empty() && witness_script.empty() && hd_keypaths.empty() && unknown.empty();
}
void PSBTOutput::Merge(const PSBTOutput& output)
{
hd_keypaths.insert(output.hd_keypaths.begin(), output.hd_keypaths.end());
unknown.insert(output.unknown.begin(), output.unknown.end());
if (redeem_script.empty() && !output.redeem_script.empty()) redeem_script = output.redeem_script;
if (witness_script.empty() && !output.witness_script.empty()) witness_script = output.witness_script;
}
bool HidingSigningProvider::GetCScript(const CScriptID& scriptid, CScript& script) const
{
return m_provider->GetCScript(scriptid, script);
}
bool HidingSigningProvider::GetPubKey(const CKeyID& keyid, CPubKey& pubkey) const
{
return m_provider->GetPubKey(keyid, pubkey);
}
bool HidingSigningProvider::GetKey(const CKeyID& keyid, CKey& key) const
{
if (m_hide_secret) return false;
return m_provider->GetKey(keyid, key);
}
bool HidingSigningProvider::GetKeyOrigin(const CKeyID& keyid, KeyOriginInfo& info) const
{
if (m_hide_origin) return false;
return m_provider->GetKeyOrigin(keyid, info);
}
bool FlatSigningProvider::GetCScript(const CScriptID& scriptid, CScript& script) const { return LookupHelper(scripts, scriptid, script); }
bool FlatSigningProvider::GetPubKey(const CKeyID& keyid, CPubKey& pubkey) const { return LookupHelper(pubkeys, keyid, pubkey); }
bool FlatSigningProvider::GetKeyOrigin(const CKeyID& keyid, KeyOriginInfo& info) const { return LookupHelper(origins, keyid, info); }
bool FlatSigningProvider::GetKey(const CKeyID& keyid, CKey& key) const { return LookupHelper(keys, keyid, key); }
FlatSigningProvider Merge(const FlatSigningProvider& a, const FlatSigningProvider& b)
{
FlatSigningProvider ret;
ret.scripts = a.scripts;
ret.scripts.insert(b.scripts.begin(), b.scripts.end());
ret.pubkeys = a.pubkeys;
ret.pubkeys.insert(b.pubkeys.begin(), b.pubkeys.end());
ret.keys = a.keys;
ret.keys.insert(b.keys.begin(), b.keys.end());
return ret;
}
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