Bitcoin Core 29.99.0
P2P Digital Currency
feebumper.cpp
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1// Copyright (c) 2017-2022 The Bitcoin Core developers
2// Distributed under the MIT software license, see the accompanying
3// file COPYING or http://www.opensource.org/licenses/mit-license.php.
4
5#include <common/system.h>
7#include <interfaces/chain.h>
8#include <policy/fees.h>
9#include <policy/policy.h>
10#include <util/moneystr.h>
11#include <util/rbf.h>
12#include <util/translation.h>
13#include <wallet/coincontrol.h>
14#include <wallet/feebumper.h>
15#include <wallet/fees.h>
16#include <wallet/receive.h>
17#include <wallet/spend.h>
18#include <wallet/wallet.h>
19
20namespace wallet {
23static feebumper::Result PreconditionChecks(const CWallet& wallet, const CWalletTx& wtx, bool require_mine, std::vector<bilingual_str>& errors) EXCLUSIVE_LOCKS_REQUIRED(wallet.cs_wallet)
24{
25 if (wallet.HasWalletSpend(wtx.tx)) {
26 errors.emplace_back(Untranslated("Transaction has descendants in the wallet"));
28 }
29
30 {
31 if (wallet.chain().hasDescendantsInMempool(wtx.GetHash())) {
32 errors.emplace_back(Untranslated("Transaction has descendants in the mempool"));
34 }
35 }
36
37 if (wallet.GetTxDepthInMainChain(wtx) != 0) {
38 errors.emplace_back(Untranslated("Transaction has been mined, or is conflicted with a mined transaction"));
40 }
41
42 if (wtx.mapValue.count("replaced_by_txid")) {
43 errors.push_back(Untranslated(strprintf("Cannot bump transaction %s which was already bumped by transaction %s", wtx.GetHash().ToString(), wtx.mapValue.at("replaced_by_txid"))));
45 }
46
47 if (require_mine) {
48 // check that original tx consists entirely of our inputs
49 // if not, we can't bump the fee, because the wallet has no way of knowing the value of the other inputs (thus the fee)
50 if (!AllInputsMine(wallet, *wtx.tx)) {
51 errors.emplace_back(Untranslated("Transaction contains inputs that don't belong to this wallet"));
53 }
54 }
55
57}
58
60static feebumper::Result CheckFeeRate(const CWallet& wallet, const CMutableTransaction& mtx, const CFeeRate& newFeerate, const int64_t maxTxSize, CAmount old_fee, std::vector<bilingual_str>& errors)
61{
62 // check that fee rate is higher than mempool's minimum fee
63 // (no point in bumping fee if we know that the new tx won't be accepted to the mempool)
64 // This may occur if the user set fee_rate or paytxfee too low, if fallbackfee is too low, or, perhaps,
65 // in a rare situation where the mempool minimum fee increased significantly since the fee estimation just a
66 // moment earlier. In this case, we report an error to the user, who may adjust the fee.
67 CFeeRate minMempoolFeeRate = wallet.chain().mempoolMinFee();
68
69 if (newFeerate.GetFeePerK() < minMempoolFeeRate.GetFeePerK()) {
70 errors.push_back(Untranslated(
71 strprintf("New fee rate (%s) is lower than the minimum fee rate (%s) to get into the mempool -- ",
72 FormatMoney(newFeerate.GetFeePerK()),
73 FormatMoney(minMempoolFeeRate.GetFeePerK()))));
75 }
76
77 std::vector<COutPoint> reused_inputs;
78 reused_inputs.reserve(mtx.vin.size());
79 for (const CTxIn& txin : mtx.vin) {
80 reused_inputs.push_back(txin.prevout);
81 }
82
83 std::optional<CAmount> combined_bump_fee = wallet.chain().calculateCombinedBumpFee(reused_inputs, newFeerate);
84 if (!combined_bump_fee.has_value()) {
85 errors.push_back(Untranslated(strprintf("Failed to calculate bump fees, because unconfirmed UTXOs depend on an enormous cluster of unconfirmed transactions.")));
86 }
87 CAmount new_total_fee = newFeerate.GetFee(maxTxSize) + combined_bump_fee.value();
88
89 CFeeRate incrementalRelayFee = wallet.chain().relayIncrementalFee();
90
91 // Min total fee is old fee + relay fee
92 CAmount minTotalFee = old_fee + incrementalRelayFee.GetFee(maxTxSize);
93
94 if (new_total_fee < minTotalFee) {
95 errors.push_back(Untranslated(strprintf("Insufficient total fee %s, must be at least %s (oldFee %s + incrementalFee %s)",
96 FormatMoney(new_total_fee), FormatMoney(minTotalFee), FormatMoney(old_fee), FormatMoney(incrementalRelayFee.GetFee(maxTxSize)))));
98 }
99
100 CAmount requiredFee = GetRequiredFee(wallet, maxTxSize);
101 if (new_total_fee < requiredFee) {
102 errors.push_back(Untranslated(strprintf("Insufficient total fee (cannot be less than required fee %s)",
103 FormatMoney(requiredFee))));
105 }
106
107 // Check that in all cases the new fee doesn't violate maxTxFee
108 const CAmount max_tx_fee = wallet.m_default_max_tx_fee;
109 if (new_total_fee > max_tx_fee) {
110 errors.push_back(Untranslated(strprintf("Specified or calculated fee %s is too high (cannot be higher than -maxtxfee %s)",
111 FormatMoney(new_total_fee), FormatMoney(max_tx_fee))));
113 }
114
116}
117
118static CFeeRate EstimateFeeRate(const CWallet& wallet, const CWalletTx& wtx, const CAmount old_fee, const CCoinControl& coin_control)
119{
120 // Get the fee rate of the original transaction. This is calculated from
121 // the tx fee/vsize, so it may have been rounded down. Add 1 satoshi to the
122 // result.
123 int64_t txSize = GetVirtualTransactionSize(*(wtx.tx));
124 CFeeRate feerate(old_fee, txSize);
125 feerate += CFeeRate(1);
126
127 // The node has a configurable incremental relay fee. Increment the fee by
128 // the minimum of that and the wallet's conservative
129 // WALLET_INCREMENTAL_RELAY_FEE value to future proof against changes to
130 // network wide policy for incremental relay fee that our node may not be
131 // aware of. This ensures we're over the required relay fee rate
132 // (Rule 4). The replacement tx will be at least as large as the
133 // original tx, so the total fee will be greater (Rule 3)
134 CFeeRate node_incremental_relay_fee = wallet.chain().relayIncrementalFee();
135 CFeeRate wallet_incremental_relay_fee = CFeeRate(WALLET_INCREMENTAL_RELAY_FEE);
136 feerate += std::max(node_incremental_relay_fee, wallet_incremental_relay_fee);
137
138 // Fee rate must also be at least the wallet's GetMinimumFeeRate
139 CFeeRate min_feerate(GetMinimumFeeRate(wallet, coin_control, /*feeCalc=*/nullptr));
140
141 // Set the required fee rate for the replacement transaction in coin control.
142 return std::max(feerate, min_feerate);
143}
144
145namespace feebumper {
146
147bool TransactionCanBeBumped(const CWallet& wallet, const Txid& txid)
148{
149 LOCK(wallet.cs_wallet);
150 const CWalletTx* wtx = wallet.GetWalletTx(txid);
151 if (wtx == nullptr) return false;
152
153 std::vector<bilingual_str> errors_dummy;
154 feebumper::Result res = PreconditionChecks(wallet, *wtx, /* require_mine=*/ true, errors_dummy);
155 return res == feebumper::Result::OK;
156}
157
158Result CreateRateBumpTransaction(CWallet& wallet, const Txid& txid, const CCoinControl& coin_control, std::vector<bilingual_str>& errors,
159 CAmount& old_fee, CAmount& new_fee, CMutableTransaction& mtx, bool require_mine, const std::vector<CTxOut>& outputs, std::optional<uint32_t> original_change_index)
160{
161 // For now, cannot specify both new outputs to use and an output index to send change
162 if (!outputs.empty() && original_change_index.has_value()) {
163 errors.emplace_back(Untranslated("The options 'outputs' and 'original_change_index' are incompatible. You can only either specify a new set of outputs, or designate a change output to be recycled."));
165 }
166
167 // We are going to modify coin control later, copy to reuse
168 CCoinControl new_coin_control(coin_control);
169
170 LOCK(wallet.cs_wallet);
171 errors.clear();
172 auto it = wallet.mapWallet.find(txid);
173 if (it == wallet.mapWallet.end()) {
174 errors.emplace_back(Untranslated("Invalid or non-wallet transaction id"));
176 }
177 const CWalletTx& wtx = it->second;
178
179 // Make sure that original_change_index is valid
180 if (original_change_index.has_value() && original_change_index.value() >= wtx.tx->vout.size()) {
181 errors.emplace_back(Untranslated("Change position is out of range"));
183 }
184
185 // Retrieve all of the UTXOs and add them to coin control
186 // While we're here, calculate the input amount
187 std::map<COutPoint, Coin> coins;
188 CAmount input_value = 0;
189 std::vector<CTxOut> spent_outputs;
190 for (const CTxIn& txin : wtx.tx->vin) {
191 coins[txin.prevout]; // Create empty map entry keyed by prevout.
192 }
193 wallet.chain().findCoins(coins);
194 for (const CTxIn& txin : wtx.tx->vin) {
195 const Coin& coin = coins.at(txin.prevout);
196 if (coin.out.IsNull()) {
197 errors.emplace_back(Untranslated(strprintf("%s:%u is already spent", txin.prevout.hash.GetHex(), txin.prevout.n)));
198 return Result::MISC_ERROR;
199 }
200 PreselectedInput& preset_txin = new_coin_control.Select(txin.prevout);
201 if (!wallet.IsMine(txin.prevout)) {
202 preset_txin.SetTxOut(coin.out);
203 }
204 input_value += coin.out.nValue;
205 spent_outputs.push_back(coin.out);
206 }
207
208 // Figure out if we need to compute the input weight, and do so if necessary
210 txdata.Init(*wtx.tx, std::move(spent_outputs), /* force=*/ true);
211 for (unsigned int i = 0; i < wtx.tx->vin.size(); ++i) {
212 const CTxIn& txin = wtx.tx->vin.at(i);
213 const Coin& coin = coins.at(txin.prevout);
214
215 if (new_coin_control.IsExternalSelected(txin.prevout)) {
216 // For external inputs, we estimate the size using the size of this input
217 int64_t input_weight = GetTransactionInputWeight(txin);
218 // Because signatures can have different sizes, we need to figure out all of the
219 // signature sizes and replace them with the max sized signature.
220 // In order to do this, we verify the script with a special SignatureChecker which
221 // will observe the signatures verified and record their sizes.
222 SignatureWeights weights;
223 TransactionSignatureChecker tx_checker(wtx.tx.get(), i, coin.out.nValue, txdata, MissingDataBehavior::FAIL);
224 SignatureWeightChecker size_checker(weights, tx_checker);
226 // Add the difference between max and current to input_weight so that it represents the largest the input could be
227 input_weight += weights.GetWeightDiffToMax();
228 new_coin_control.SetInputWeight(txin.prevout, input_weight);
229 }
230 }
231
232 Result result = PreconditionChecks(wallet, wtx, require_mine, errors);
233 if (result != Result::OK) {
234 return result;
235 }
236
237 // Calculate the old output amount.
238 CAmount output_value = 0;
239 for (const auto& old_output : wtx.tx->vout) {
240 output_value += old_output.nValue;
241 }
242
243 old_fee = input_value - output_value;
244
245 // Fill in recipients (and preserve a single change key if there
246 // is one). If outputs vector is non-empty, replace original
247 // outputs with its contents, otherwise use original outputs.
248 std::vector<CRecipient> recipients;
249 CAmount new_outputs_value = 0;
250 const auto& txouts = outputs.empty() ? wtx.tx->vout : outputs;
251 for (size_t i = 0; i < txouts.size(); ++i) {
252 const CTxOut& output = txouts.at(i);
253 CTxDestination dest;
254 ExtractDestination(output.scriptPubKey, dest);
255 if (original_change_index.has_value() ? original_change_index.value() == i : OutputIsChange(wallet, output)) {
256 new_coin_control.destChange = dest;
257 } else {
258 CRecipient recipient = {dest, output.nValue, false};
259 recipients.push_back(recipient);
260 }
261 new_outputs_value += output.nValue;
262 }
263
264 // If no recipients, means that we are sending coins to a change address
265 if (recipients.empty()) {
266 // Just as a sanity check, ensure that the change address exist
267 if (std::get_if<CNoDestination>(&new_coin_control.destChange)) {
268 errors.emplace_back(Untranslated("Unable to create transaction. Transaction must have at least one recipient"));
270 }
271
272 // Add change as recipient with SFFO flag enabled, so fees are deduced from it.
273 // If the output differs from the original tx output (because the user customized it) a new change output will be created.
274 recipients.emplace_back(CRecipient{new_coin_control.destChange, new_outputs_value, /*fSubtractFeeFromAmount=*/true});
275 new_coin_control.destChange = CNoDestination();
276 }
277
278 if (coin_control.m_feerate) {
279 // The user provided a feeRate argument.
280 // We calculate this here to avoid compiler warning on the cs_wallet lock
281 // We need to make a temporary transaction with no input witnesses as the dummy signer expects them to be empty for external inputs
282 CMutableTransaction temp_mtx{*wtx.tx};
283 for (auto& txin : temp_mtx.vin) {
284 txin.scriptSig.clear();
285 txin.scriptWitness.SetNull();
286 }
287 temp_mtx.vout = txouts;
288 const int64_t maxTxSize{CalculateMaximumSignedTxSize(CTransaction(temp_mtx), &wallet, &new_coin_control).vsize};
289 Result res = CheckFeeRate(wallet, temp_mtx, *new_coin_control.m_feerate, maxTxSize, old_fee, errors);
290 if (res != Result::OK) {
291 return res;
292 }
293 } else {
294 // The user did not provide a feeRate argument
295 new_coin_control.m_feerate = EstimateFeeRate(wallet, wtx, old_fee, new_coin_control);
296 }
297
298 // Fill in required inputs we are double-spending(all of them)
299 // N.B.: bip125 doesn't require all the inputs in the replaced transaction to be
300 // used in the replacement transaction, but it's very important for wallets to make
301 // sure that happens. If not, it would be possible to bump a transaction A twice to
302 // A2 and A3 where A2 and A3 don't conflict (or alternatively bump A to A2 and A2
303 // to A3 where A and A3 don't conflict). If both later get confirmed then the sender
304 // has accidentally double paid.
305 for (const auto& inputs : wtx.tx->vin) {
306 new_coin_control.Select(COutPoint(inputs.prevout));
307 }
308 new_coin_control.m_allow_other_inputs = true;
309
310 // We cannot source new unconfirmed inputs(bip125 rule 2)
311 new_coin_control.m_min_depth = 1;
312
313 auto res = CreateTransaction(wallet, recipients, /*change_pos=*/std::nullopt, new_coin_control, false);
314 if (!res) {
315 errors.emplace_back(Untranslated("Unable to create transaction.") + Untranslated(" ") + util::ErrorString(res));
317 }
318
319 const auto& txr = *res;
320 // Write back new fee if successful
321 new_fee = txr.fee;
322
323 // Write back transaction
324 mtx = CMutableTransaction(*txr.tx);
325
326 return Result::OK;
327}
328
330 LOCK(wallet.cs_wallet);
331
332 if (wallet.IsWalletFlagSet(WALLET_FLAG_EXTERNAL_SIGNER)) {
333 // Make a blank psbt
335
336 // First fill transaction with our data without signing,
337 // so external signers are not asked to sign more than once.
338 bool complete;
339 wallet.FillPSBT(psbtx, complete, std::nullopt, /*sign=*/false, /*bip32derivs=*/true);
340 auto err{wallet.FillPSBT(psbtx, complete, std::nullopt, /*sign=*/true, /*bip32derivs=*/false)};
341 if (err) return false;
342 complete = FinalizeAndExtractPSBT(psbtx, mtx);
343 return complete;
344 } else {
345 return wallet.SignTransaction(mtx);
346 }
347}
348
349Result CommitTransaction(CWallet& wallet, const Txid& txid, CMutableTransaction&& mtx, std::vector<bilingual_str>& errors, Txid& bumped_txid)
350{
351 LOCK(wallet.cs_wallet);
352 if (!errors.empty()) {
353 return Result::MISC_ERROR;
354 }
355 auto it = txid.IsNull() ? wallet.mapWallet.end() : wallet.mapWallet.find(txid);
356 if (it == wallet.mapWallet.end()) {
357 errors.emplace_back(Untranslated("Invalid or non-wallet transaction id"));
358 return Result::MISC_ERROR;
359 }
360 const CWalletTx& oldWtx = it->second;
361
362 // make sure the transaction still has no descendants and hasn't been mined in the meantime
363 Result result = PreconditionChecks(wallet, oldWtx, /* require_mine=*/ false, errors);
364 if (result != Result::OK) {
365 return result;
366 }
367
368 // commit/broadcast the tx
369 CTransactionRef tx = MakeTransactionRef(std::move(mtx));
370 mapValue_t mapValue = oldWtx.mapValue;
371 mapValue["replaces_txid"] = oldWtx.GetHash().ToString();
372
373 wallet.CommitTransaction(tx, std::move(mapValue), oldWtx.vOrderForm);
374
375 // mark the original tx as bumped
376 bumped_txid = tx->GetHash();
377 if (!wallet.MarkReplaced(oldWtx.GetHash(), bumped_txid)) {
378 errors.emplace_back(Untranslated("Created new bumpfee transaction but could not mark the original transaction as replaced"));
379 }
380 return Result::OK;
381}
382
383} // namespace feebumper
384} // namespace wallet
bool ExtractDestination(const CScript &scriptPubKey, CTxDestination &addressRet)
Parse a scriptPubKey for the destination.
Definition: addresstype.cpp:49
std::variant< CNoDestination, PubKeyDestination, PKHash, ScriptHash, WitnessV0ScriptHash, WitnessV0KeyHash, WitnessV1Taproot, PayToAnchor, WitnessUnknown > CTxDestination
A txout script categorized into standard templates.
Definition: addresstype.h:143
int64_t CAmount
Amount in satoshis (Can be negative)
Definition: amount.h:12
Fee rate in satoshis per virtualbyte: CAmount / vB the feerate is represented internally as FeeFrac.
Definition: feerate.h:35
CAmount GetFeePerK() const
Return the fee in satoshis for a vsize of 1000 vbytes.
Definition: feerate.h:63
CAmount GetFee(int32_t virtual_bytes) const
Return the fee in satoshis for the given vsize in vbytes.
Definition: feerate.cpp:20
An outpoint - a combination of a transaction hash and an index n into its vout.
Definition: transaction.h:29
uint32_t n
Definition: transaction.h:32
Txid hash
Definition: transaction.h:31
void clear()
Definition: script.h:576
The basic transaction that is broadcasted on the network and contained in blocks.
Definition: transaction.h:296
An input of a transaction.
Definition: transaction.h:67
CScript scriptSig
Definition: transaction.h:70
CScriptWitness scriptWitness
Only serialized through CTransaction.
Definition: transaction.h:72
COutPoint prevout
Definition: transaction.h:69
An output of a transaction.
Definition: transaction.h:150
CScript scriptPubKey
Definition: transaction.h:153
CAmount nValue
Definition: transaction.h:152
bool IsNull() const
Definition: transaction.h:170
A UTXO entry.
Definition: coins.h:33
CTxOut out
unspent transaction output
Definition: coins.h:36
std::string ToString() const
constexpr bool IsNull() const
Wrapped uint256 methods.
std::string GetHex() const
Coin Control Features.
Definition: coincontrol.h:83
PreselectedInput & Select(const COutPoint &outpoint)
Lock-in the given output for spending.
Definition: coincontrol.cpp:40
bool IsExternalSelected(const COutPoint &outpoint) const
Returns true if the given output is selected as an external input.
Definition: coincontrol.cpp:25
int m_min_depth
Minimum chain depth value for coin availability.
Definition: coincontrol.h:109
bool m_allow_other_inputs
If true, the selection process can add extra unselected inputs from the wallet while requires all sel...
Definition: coincontrol.h:93
void SetInputWeight(const COutPoint &outpoint, int64_t weight)
Set an input's weight.
Definition: coincontrol.cpp:67
std::optional< CFeeRate > m_feerate
Override the wallet's m_pay_tx_fee if set.
Definition: coincontrol.h:97
CTxDestination destChange
Custom change destination, if not set an address is generated.
Definition: coincontrol.h:86
A CWallet maintains a set of transactions and balances, and provides the ability to create new transa...
Definition: wallet.h:311
A transaction with a bunch of additional info that only the owner cares about.
Definition: transaction.h:195
const Txid & GetHash() const LIFETIMEBOUND
Definition: transaction.h:364
std::vector< std::pair< std::string, std::string > > vOrderForm
Definition: transaction.h:223
mapValue_t mapValue
Key/value map with information about the transaction.
Definition: transaction.h:222
CTransactionRef tx
Definition: transaction.h:267
void SetTxOut(const CTxOut &txout)
Set the previous output for this input.
Definition: coincontrol.cpp:90
static int64_t GetTransactionInputWeight(const CTxIn &txin)
Definition: validation.h:140
bool VerifyScript(const CScript &scriptSig, const CScript &scriptPubKey, const CScriptWitness *witness, unsigned int flags, const BaseSignatureChecker &checker, ScriptError *serror)
@ FAIL
Just act as if the signature was invalid.
std::string FormatMoney(const CAmount n)
Money parsing/formatting utilities.
Definition: moneystr.cpp:19
bilingual_str ErrorString(const Result< T > &result)
Definition: result.h:93
Result CreateRateBumpTransaction(CWallet &wallet, const Txid &txid, const CCoinControl &coin_control, std::vector< bilingual_str > &errors, CAmount &old_fee, CAmount &new_fee, CMutableTransaction &mtx, bool require_mine, const std::vector< CTxOut > &outputs, std::optional< uint32_t > original_change_index)
Create bumpfee transaction based on feerate estimates.
Definition: feebumper.cpp:158
bool TransactionCanBeBumped(const CWallet &wallet, const Txid &txid)
Return whether transaction can be bumped.
Definition: feebumper.cpp:147
bool SignTransaction(CWallet &wallet, CMutableTransaction &mtx)
Sign the new transaction,.
Definition: feebumper.cpp:329
Result CommitTransaction(CWallet &wallet, const Txid &txid, CMutableTransaction &&mtx, std::vector< bilingual_str > &errors, Txid &bumped_txid)
Commit the bumpfee transaction.
Definition: feebumper.cpp:349
bool OutputIsChange(const CWallet &wallet, const CTxOut &txout)
Definition: receive.cpp:74
util::Result< CreatedTransactionResult > CreateTransaction(CWallet &wallet, const std::vector< CRecipient > &vecSend, std::optional< unsigned int > change_pos, const CCoinControl &coin_control, bool sign)
Create a new transaction paying the recipients with a set of coins selected by SelectCoins(); Also cr...
Definition: spend.cpp:1406
bool AllInputsMine(const CWallet &wallet, const CTransaction &tx)
Returns whether all of the inputs belong to the wallet.
Definition: receive.cpp:23
std::map< std::string, std::string > mapValue_t
Definition: transaction.h:167
static feebumper::Result PreconditionChecks(const CWallet &wallet, const CWalletTx &wtx, bool require_mine, std::vector< bilingual_str > &errors) EXCLUSIVE_LOCKS_REQUIRED(wallet.cs_wallet)
Check whether transaction has descendant in wallet or mempool, or has been mined, or conflicts with a...
Definition: feebumper.cpp:23
CFeeRate GetMinimumFeeRate(const CWallet &wallet, const CCoinControl &coin_control, FeeCalculation *feeCalc)
Estimate the minimum fee rate considering user set parameters and the required fee.
Definition: fees.cpp:29
static CFeeRate EstimateFeeRate(const CWallet &wallet, const CWalletTx &wtx, const CAmount old_fee, const CCoinControl &coin_control)
Definition: feebumper.cpp:118
static const CAmount WALLET_INCREMENTAL_RELAY_FEE
minimum recommended increment for replacement txs
Definition: wallet.h:125
static feebumper::Result CheckFeeRate(const CWallet &wallet, const CMutableTransaction &mtx, const CFeeRate &newFeerate, const int64_t maxTxSize, CAmount old_fee, std::vector< bilingual_str > &errors)
Check if the user provided a valid feeRate.
Definition: feebumper.cpp:60
TxSize CalculateMaximumSignedTxSize(const CTransaction &tx, const CWallet *wallet, const std::vector< CTxOut > &txouts, const CCoinControl *coin_control)
Calculate the size of the transaction using CoinControl to determine whether to expect signature grin...
Definition: spend.cpp:144
@ WALLET_FLAG_EXTERNAL_SIGNER
Indicates that the wallet needs an external signer.
Definition: walletutil.h:56
CAmount GetRequiredFee(const CWallet &wallet, unsigned int nTxBytes)
Return the minimum required absolute fee for this size based on the required fee rate.
Definition: fees.cpp:13
int64_t GetVirtualTransactionSize(int64_t nWeight, int64_t nSigOpCost, unsigned int bytes_per_sigop)
Compute the virtual transaction size (weight reinterpreted as bytes).
Definition: policy.cpp:376
static constexpr unsigned int STANDARD_SCRIPT_VERIFY_FLAGS
Standard script verification flags that standard transactions will comply with.
Definition: policy.h:115
static CTransactionRef MakeTransactionRef(Tx &&txIn)
Definition: transaction.h:424
std::shared_ptr< const CTransaction > CTransactionRef
Definition: transaction.h:423
bool FinalizeAndExtractPSBT(PartiallySignedTransaction &psbtx, CMutableTransaction &result)
Finalizes a PSBT if possible, and extracts it to a CMutableTransaction if it could be finalized.
Definition: psbt.cpp:543
A mutable version of CTransaction.
Definition: transaction.h:378
std::vector< CTxIn > vin
Definition: transaction.h:379
void SetNull()
Definition: script.h:595
A version of CTransaction with the PSBT format.
Definition: psbt.h:1119
void Init(const T &tx, std::vector< CTxOut > &&spent_outputs, bool force=false)
Initialize this PrecomputedTransactionData with transaction data.
int64_t vsize
Definition: spend.h:28
int64_t GetWeightDiffToMax() const
Definition: feebumper.h:99
#define LOCK(cs)
Definition: sync.h:259
#define EXCLUSIVE_LOCKS_REQUIRED(...)
Definition: threadsafety.h:51
#define strprintf
Format arguments and return the string or write to given std::ostream (see tinyformat::format doc for...
Definition: tinyformat.h:1172
bilingual_str Untranslated(std::string original)
Mark a bilingual_str as untranslated.
Definition: translation.h:82