diff options
| -rw-r--r-- | src/Makefile.am | 2 | ||||
| -rw-r--r-- | src/wallet/feebumper.cpp | 275 | ||||
| -rw-r--r-- | src/wallet/feebumper.h | 46 | ||||
| -rw-r--r-- | src/wallet/rpcwallet.cpp | 254 | ||||
| -rw-r--r-- | src/wallet/wallet.cpp | 21 | ||||
| -rw-r--r-- | src/wallet/wallet.h | 5 |
6 files changed, 382 insertions, 221 deletions
diff --git a/src/Makefile.am b/src/Makefile.am index 30d027315a..eab8efc74f 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -156,6 +156,7 @@ BITCOIN_CORE_H = \ wallet/coincontrol.h \ wallet/crypter.h \ wallet/db.h \ + wallet/feebumper.h \ wallet/rpcwallet.h \ wallet/wallet.h \ wallet/walletdb.h \ @@ -230,6 +231,7 @@ libbitcoin_wallet_a_CXXFLAGS = $(AM_CXXFLAGS) $(PIE_FLAGS) libbitcoin_wallet_a_SOURCES = \ wallet/crypter.cpp \ wallet/db.cpp \ + wallet/feebumper.cpp \ wallet/rpcdump.cpp \ wallet/rpcwallet.cpp \ wallet/wallet.cpp \ diff --git a/src/wallet/feebumper.cpp b/src/wallet/feebumper.cpp new file mode 100644 index 0000000000..98b6da83c2 --- /dev/null +++ b/src/wallet/feebumper.cpp @@ -0,0 +1,275 @@ +// Copyright (c) 2017 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 "consensus/validation.h" +#include "wallet/feebumper.h" +#include "wallet/wallet.h" +#include "policy/policy.h" +#include "policy/rbf.h" +#include "validation.h" //for mempool access +#include "txmempool.h" +#include "utilmoneystr.h" +#include "util.h" +#include "net.h" + +// Calculate the size of the transaction assuming all signatures are max size +// Use DummySignatureCreator, which inserts 72 byte signatures everywhere. +// TODO: re-use this in CWallet::CreateTransaction (right now +// CreateTransaction uses the constructed dummy-signed tx to do a priority +// calculation, but we should be able to refactor after priority is removed). +// NOTE: this requires that all inputs must be in mapWallet (eg the tx should +// be IsAllFromMe). +int64_t CalculateMaximumSignedTxSize(const CWallet *pWallet, const CTransaction &tx) +{ + CMutableTransaction txNew(tx); + std::vector<std::pair<const CWalletTx *, unsigned int>> vCoins; + // Look up the inputs. We should have already checked that this transaction + // IsAllFromMe(ISMINE_SPENDABLE), so every input should already be in our + // wallet, with a valid index into the vout array. + for (auto& input : tx.vin) { + const auto mi = pWallet->mapWallet.find(input.prevout.hash); + assert(mi != pWallet->mapWallet.end() && input.prevout.n < mi->second.tx->vout.size()); + vCoins.emplace_back(std::make_pair(&(mi->second), input.prevout.n)); + } + if (!pWallet->DummySignTx(txNew, vCoins)) { + // This should never happen, because IsAllFromMe(ISMINE_SPENDABLE) + // implies that we can sign for every input. + return -1; + } + return GetVirtualTransactionSize(txNew); +} + +CFeeBumper::CFeeBumper(const CWallet *pWallet, const uint256 txidIn, int newConfirmTarget, bool specifiedConfirmTarget, CAmount totalFee, bool newTxReplaceable) + : + txid(txidIn), + nOldFee(0), + nNewFee(0) +{ + vErrors.clear(); + bumpedTxid.SetNull(); + AssertLockHeld(pWallet->cs_wallet); + if (!pWallet->mapWallet.count(txid)) { + vErrors.push_back("Invalid or non-wallet transaction id"); + currentResult = BumpFeeResult::INVALID_ADDRESS_OR_KEY; + return; + } + auto it = pWallet->mapWallet.find(txid); + const CWalletTx& wtx = it->second; + + if (pWallet->HasWalletSpend(txid)) { + vErrors.push_back("Transaction has descendants in the wallet"); + currentResult = BumpFeeResult::INVALID_PARAMETER; + return; + } + + { + LOCK(mempool.cs); + auto it_mp = mempool.mapTx.find(txid); + if (it_mp != mempool.mapTx.end() && it_mp->GetCountWithDescendants() > 1) { + vErrors.push_back("Transaction has descendants in the mempool"); + currentResult = BumpFeeResult::INVALID_PARAMETER; + return; + } + } + + if (wtx.GetDepthInMainChain() != 0) { + vErrors.push_back("Transaction has been mined, or is conflicted with a mined transaction"); + currentResult = BumpFeeResult::WALLET_ERROR; + return; + } + + if (!SignalsOptInRBF(wtx)) { + vErrors.push_back("Transaction is not BIP 125 replaceable"); + currentResult = BumpFeeResult::WALLET_ERROR; + return; + } + + if (wtx.mapValue.count("replaced_by_txid")) { + vErrors.push_back(strprintf("Cannot bump transaction %s which was already bumped by transaction %s", txid.ToString(), wtx.mapValue.at("replaced_by_txid"))); + currentResult = BumpFeeResult::WALLET_ERROR; + return; + } + + // check that original tx consists entirely of our inputs + // 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) + if (!pWallet->IsAllFromMe(wtx, ISMINE_SPENDABLE)) { + vErrors.push_back("Transaction contains inputs that don't belong to this wallet"); + currentResult = BumpFeeResult::WALLET_ERROR; + return; + } + + // figure out which output was change + // if there was no change output or multiple change outputs, fail + int nOutput = -1; + for (size_t i = 0; i < wtx.tx->vout.size(); ++i) { + if (pWallet->IsChange(wtx.tx->vout[i])) { + if (nOutput != -1) { + vErrors.push_back("Transaction has multiple change outputs"); + currentResult = BumpFeeResult::WALLET_ERROR; + return; + } + nOutput = i; + } + } + if (nOutput == -1) { + vErrors.push_back("Transaction does not have a change output"); + currentResult = BumpFeeResult::WALLET_ERROR; + return; + } + + // Calculate the expected size of the new transaction. + int64_t txSize = GetVirtualTransactionSize(*(wtx.tx)); + const int64_t maxNewTxSize = CalculateMaximumSignedTxSize(pWallet, *wtx.tx); + if (maxNewTxSize < 0) { + vErrors.push_back("Transaction contains inputs that cannot be signed"); + currentResult = BumpFeeResult::INVALID_ADDRESS_OR_KEY; + return; + } + + // calculate the old fee and fee-rate + nOldFee = wtx.GetDebit(ISMINE_SPENDABLE) - wtx.tx->GetValueOut(); + CFeeRate nOldFeeRate(nOldFee, txSize); + CFeeRate nNewFeeRate; + // The wallet uses a conservative WALLET_INCREMENTAL_RELAY_FEE value to + // future proof against changes to network wide policy for incremental relay + // fee that our node may not be aware of. + CFeeRate walletIncrementalRelayFee = CFeeRate(WALLET_INCREMENTAL_RELAY_FEE); + if (::incrementalRelayFee > walletIncrementalRelayFee) { + walletIncrementalRelayFee = ::incrementalRelayFee; + } + + if (totalFee > 0) { + CAmount minTotalFee = nOldFeeRate.GetFee(maxNewTxSize) + ::incrementalRelayFee.GetFee(maxNewTxSize); + if (totalFee < minTotalFee) { + vErrors.push_back(strprintf("Insufficient totalFee, must be at least %s (oldFee %s + incrementalFee %s)", + FormatMoney(minTotalFee), FormatMoney(nOldFeeRate.GetFee(maxNewTxSize)), FormatMoney(::incrementalRelayFee.GetFee(maxNewTxSize)))); + currentResult = BumpFeeResult::INVALID_PARAMETER; + return; + } + CAmount requiredFee = pWallet->GetRequiredFee(maxNewTxSize); + if (totalFee < requiredFee) { + vErrors.push_back(strprintf("Insufficient totalFee (cannot be less than required fee %s)", + FormatMoney(requiredFee))); + currentResult = BumpFeeResult::INVALID_PARAMETER; + return; + } + nNewFee = totalFee; + nNewFeeRate = CFeeRate(totalFee, maxNewTxSize); + } else { + // if user specified a confirm target then don't consider any global payTxFee + if (specifiedConfirmTarget) { + nNewFee = pWallet->GetMinimumFee(maxNewTxSize, newConfirmTarget, mempool, CAmount(0)); + } + // otherwise use the regular wallet logic to select payTxFee or default confirm target + else { + nNewFee = pWallet->GetMinimumFee(maxNewTxSize, newConfirmTarget, mempool); + } + + nNewFeeRate = CFeeRate(nNewFee, maxNewTxSize); + + // New fee rate must be at least old rate + minimum incremental relay rate + // walletIncrementalRelayFee.GetFeePerK() should be exact, because it's initialized + // in that unit (fee per kb). + // However, nOldFeeRate is a calculated value from the tx fee/size, so + // add 1 satoshi to the result, because it may have been rounded down. + if (nNewFeeRate.GetFeePerK() < nOldFeeRate.GetFeePerK() + 1 + walletIncrementalRelayFee.GetFeePerK()) { + nNewFeeRate = CFeeRate(nOldFeeRate.GetFeePerK() + 1 + walletIncrementalRelayFee.GetFeePerK()); + nNewFee = nNewFeeRate.GetFee(maxNewTxSize); + } + } + + // Check that in all cases the new fee doesn't violate maxTxFee + if (nNewFee > maxTxFee) { + vErrors.push_back(strprintf("Specified or calculated fee %s is too high (cannot be higher than maxTxFee %s)", + FormatMoney(nNewFee), FormatMoney(maxTxFee))); + currentResult = BumpFeeResult::WALLET_ERROR; + return; + } + + // check that fee rate is higher than mempool's minimum fee + // (no point in bumping fee if we know that the new tx won't be accepted to the mempool) + // This may occur if the user set TotalFee or paytxfee too low, if fallbackfee is too low, or, perhaps, + // in a rare situation where the mempool minimum fee increased significantly since the fee estimation just a + // moment earlier. In this case, we report an error to the user, who may use totalFee to make an adjustment. + CFeeRate minMempoolFeeRate = mempool.GetMinFee(GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000); + if (nNewFeeRate.GetFeePerK() < minMempoolFeeRate.GetFeePerK()) { + vErrors.push_back(strprintf("New fee rate (%s) is less than the minimum fee rate (%s) to get into the mempool. totalFee value should to be at least %s or settxfee value should be at least %s to add transaction.", FormatMoney(nNewFeeRate.GetFeePerK()), FormatMoney(minMempoolFeeRate.GetFeePerK()), FormatMoney(minMempoolFeeRate.GetFee(maxNewTxSize)), FormatMoney(minMempoolFeeRate.GetFeePerK()))); + currentResult = BumpFeeResult::WALLET_ERROR; + return; + } + + // Now modify the output to increase the fee. + // If the output is not large enough to pay the fee, fail. + CAmount nDelta = nNewFee - nOldFee; + assert(nDelta > 0); + mtx = *wtx.tx; + CTxOut* poutput = &(mtx.vout[nOutput]); + if (poutput->nValue < nDelta) { + vErrors.push_back("Change output is too small to bump the fee"); + currentResult = BumpFeeResult::WALLET_ERROR; + return; + } + + // If the output would become dust, discard it (converting the dust to fee) + poutput->nValue -= nDelta; + if (poutput->nValue <= poutput->GetDustThreshold(::dustRelayFee)) { + LogPrint(BCLog::RPC, "Bumping fee and discarding dust output\n"); + nNewFee += poutput->nValue; + mtx.vout.erase(mtx.vout.begin() + nOutput); + } + + // Mark new tx not replaceable, if requested. + if (!newTxReplaceable) { + for (auto& input : mtx.vin) { + if (input.nSequence < 0xfffffffe) input.nSequence = 0xfffffffe; + } + } + + currentResult = BumpFeeResult::OK; +} + +bool CFeeBumper::commit(CWallet *pWallet) +{ + AssertLockHeld(pWallet->cs_wallet); + vErrors.clear(); + if (txid.IsNull() || !pWallet->mapWallet.count(txid)) { + vErrors.push_back("Invalid or non-wallet transaction id"); + currentResult = BumpFeeResult::MISC_ERROR; + } + CWalletTx& oldWtx = pWallet->mapWallet[txid]; + + CWalletTx wtxBumped(pWallet, MakeTransactionRef(std::move(mtx))); + // commit/broadcast the tx + CReserveKey reservekey(pWallet); + wtxBumped.mapValue = oldWtx.mapValue; + wtxBumped.mapValue["replaces_txid"] = oldWtx.GetHash().ToString(); + wtxBumped.vOrderForm = oldWtx.vOrderForm; + wtxBumped.strFromAccount = oldWtx.strFromAccount; + wtxBumped.fTimeReceivedIsTxTime = true; + wtxBumped.fFromMe = true; + CValidationState state; + if (!pWallet->CommitTransaction(wtxBumped, reservekey, g_connman.get(), state)) { + // NOTE: CommitTransaction never returns false, so this should never happen. + vErrors.push_back(strprintf("Error: The transaction was rejected! Reason given: %s", state.GetRejectReason())); + return false; + } + + bumpedTxid = wtxBumped.GetHash(); + if (state.IsInvalid()) { + // This can happen if the mempool rejected the transaction. Report + // what happened in the "errors" response. + vErrors.push_back(strprintf("Error: The transaction was rejected: %s", FormatStateMessage(state))); + } + + // mark the original tx as bumped + if (!pWallet->MarkReplaced(oldWtx.GetHash(), wtxBumped.GetHash())) { + // TODO: see if JSON-RPC has a standard way of returning a response + // along with an exception. It would be good to return information about + // wtxBumped to the caller even if marking the original transaction + // replaced does not succeed for some reason. + vErrors.push_back("Error: Created new bumpfee transaction but could not mark the original transaction as replaced."); + } + return true; +} + diff --git a/src/wallet/feebumper.h b/src/wallet/feebumper.h new file mode 100644 index 0000000000..42b0ccad36 --- /dev/null +++ b/src/wallet/feebumper.h @@ -0,0 +1,46 @@ +// Copyright (c) 2017 The Bitcoin Core developers +// Distributed under the MIT software license, see the accompanying +// file COPYING or http://www.opensource.org/licenses/mit-license.php. + +#ifndef BITCOIN_WALLET_FEEBUMPER_H +#define BITCOIN_WALLET_FEEBUMPER_H + +#include <primitives/transaction.h> + +class CWallet; +class uint256; + +enum class BumpFeeResult +{ + OK, + INVALID_ADDRESS_OR_KEY, + INVALID_REQUEST, + INVALID_PARAMETER, + WALLET_ERROR, + MISC_ERROR, +}; + +class CFeeBumper +{ +public: + CFeeBumper(const CWallet *pWalletIn, const uint256 txidIn, int newConfirmTarget, bool specifiedConfirmTarget, CAmount totalFee, bool newTxReplaceable); + BumpFeeResult getResult() const { return currentResult; } + const std::vector<std::string>& getErrors() const { return vErrors; } + CAmount getOldFee() const { return nOldFee; } + CAmount getNewFee() const { return nNewFee; } + CMutableTransaction* getBumpedTxRef() { return &mtx; } + uint256 getBumpedTxId() const { return bumpedTxid; } + + bool commit(CWallet *pWalletNonConst); + +private: + const uint256 txid; + uint256 bumpedTxid; + CMutableTransaction mtx; + std::vector<std::string> vErrors; + BumpFeeResult currentResult; + CAmount nOldFee; + CAmount nNewFee; +}; + +#endif // BITCOIN_WALLET_FEEBUMPER_H diff --git a/src/wallet/rpcwallet.cpp b/src/wallet/rpcwallet.cpp index af6f59c9d9..701e9987b5 100644 --- a/src/wallet/rpcwallet.cpp +++ b/src/wallet/rpcwallet.cpp @@ -18,8 +18,9 @@ #include "timedata.h" #include "util.h" #include "utilmoneystr.h" -#include "wallet.h" -#include "walletdb.h" +#include "wallet/feebumper.h" +#include "wallet/wallet.h" +#include "wallet/walletdb.h" #include <stdint.h> @@ -2778,33 +2779,6 @@ UniValue fundrawtransaction(const JSONRPCRequest& request) return result; } -// Calculate the size of the transaction assuming all signatures are max size -// Use DummySignatureCreator, which inserts 72 byte signatures everywhere. -// TODO: re-use this in CWallet::CreateTransaction (right now -// CreateTransaction uses the constructed dummy-signed tx to do a priority -// calculation, but we should be able to refactor after priority is removed). -// NOTE: this requires that all inputs must be in mapWallet (eg the tx should -// be IsAllFromMe). -int64_t CalculateMaximumSignedTxSize(const CTransaction &tx, CWallet &wallet) -{ - CMutableTransaction txNew(tx); - std::vector<std::pair<CWalletTx*, unsigned int>> vCoins; - // Look up the inputs. We should have already checked that this transaction - // IsAllFromMe(ISMINE_SPENDABLE), so every input should already be in our - // wallet, with a valid index into the vout array. - for (auto& input : tx.vin) { - const auto mi = wallet.mapWallet.find(input.prevout.hash); - assert(mi != wallet.mapWallet.end() && input.prevout.n < mi->second.tx->vout.size()); - vCoins.emplace_back(std::make_pair(&(mi->second), input.prevout.n)); - } - if (!wallet.DummySignTx(txNew, vCoins)) { - // This should never happen, because IsAllFromMe(ISMINE_SPENDABLE) - // implies that we can sign for every input. - throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Transaction contains inputs that cannot be signed"); - } - return GetVirtualTransactionSize(txNew); -} - UniValue bumpfee(const JSONRPCRequest& request) { CWallet * const pwallet = GetWalletForJSONRPCRequest(request); @@ -2891,206 +2865,48 @@ UniValue bumpfee(const JSONRPCRequest& request) } } - // retrieve the original tx from the wallet LOCK2(cs_main, pwallet->cs_wallet); EnsureWalletIsUnlocked(pwallet); - if (!pwallet->mapWallet.count(hash)) { - throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid or non-wallet transaction id"); - } - CWalletTx& wtx = pwallet->mapWallet[hash]; - - if (pwallet->HasWalletSpend(hash)) { - throw JSONRPCError(RPC_INVALID_PARAMETER, "Transaction has descendants in the wallet"); - } + CFeeBumper feeBump(pwallet, hash, newConfirmTarget, specifiedConfirmTarget, totalFee, replaceable); + BumpFeeResult res = feeBump.getResult(); + if (res != BumpFeeResult::OK) { - LOCK(mempool.cs); - auto it = mempool.mapTx.find(hash); - if (it != mempool.mapTx.end() && it->GetCountWithDescendants() > 1) { - throw JSONRPCError(RPC_INVALID_PARAMETER, "Transaction has descendants in the mempool"); + switch(res) { + case BumpFeeResult::INVALID_ADDRESS_OR_KEY: + throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, feeBump.getErrors()[0]); + break; + case BumpFeeResult::INVALID_REQUEST: + throw JSONRPCError(RPC_INVALID_REQUEST, feeBump.getErrors()[0]); + break; + case BumpFeeResult::INVALID_PARAMETER: + throw JSONRPCError(RPC_INVALID_PARAMETER, feeBump.getErrors()[0]); + break; + case BumpFeeResult::WALLET_ERROR: + throw JSONRPCError(RPC_WALLET_ERROR, feeBump.getErrors()[0]); + break; + default: + throw JSONRPCError(RPC_MISC_ERROR, feeBump.getErrors()[0]); + break; } } - if (wtx.GetDepthInMainChain() != 0) { - throw JSONRPCError(RPC_WALLET_ERROR, "Transaction has been mined, or is conflicted with a mined transaction"); - } - - if (!SignalsOptInRBF(wtx)) { - throw JSONRPCError(RPC_WALLET_ERROR, "Transaction is not BIP 125 replaceable"); - } - - if (wtx.mapValue.count("replaced_by_txid")) { - throw JSONRPCError(RPC_WALLET_ERROR, strprintf("Cannot bump transaction %s which was already bumped by transaction %s", hash.ToString(), wtx.mapValue.at("replaced_by_txid"))); - } - - // check that original tx consists entirely of our inputs - // 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) - if (!pwallet->IsAllFromMe(wtx, ISMINE_SPENDABLE)) { - throw JSONRPCError(RPC_WALLET_ERROR, "Transaction contains inputs that don't belong to this wallet"); - } - - // figure out which output was change - // if there was no change output or multiple change outputs, fail - int nOutput = -1; - for (size_t i = 0; i < wtx.tx->vout.size(); ++i) { - if (pwallet->IsChange(wtx.tx->vout[i])) { - if (nOutput != -1) { - throw JSONRPCError(RPC_WALLET_ERROR, "Transaction has multiple change outputs"); - } - nOutput = i; - } - } - if (nOutput == -1) { - throw JSONRPCError(RPC_WALLET_ERROR, "Transaction does not have a change output"); + // sign bumped transaction + if (!pwallet->SignTransaction(*feeBump.getBumpedTxRef())) { + throw JSONRPCError(RPC_WALLET_ERROR, "Can't sign transaction."); } - - // Calculate the expected size of the new transaction. - int64_t txSize = GetVirtualTransactionSize(*(wtx.tx)); - const int64_t maxNewTxSize = CalculateMaximumSignedTxSize(*wtx.tx, *pwallet); - - // calculate the old fee and fee-rate - CAmount nOldFee = wtx.GetDebit(ISMINE_SPENDABLE) - wtx.tx->GetValueOut(); - CFeeRate nOldFeeRate(nOldFee, txSize); - CAmount nNewFee; - CFeeRate nNewFeeRate; - // The wallet uses a conservative WALLET_INCREMENTAL_RELAY_FEE value to - // future proof against changes to network wide policy for incremental relay - // fee that our node may not be aware of. - CFeeRate walletIncrementalRelayFee = CFeeRate(WALLET_INCREMENTAL_RELAY_FEE); - if (::incrementalRelayFee > walletIncrementalRelayFee) { - walletIncrementalRelayFee = ::incrementalRelayFee; + // commit the bumped transaction + if(!feeBump.commit(pwallet)) { + throw JSONRPCError(RPC_WALLET_ERROR, feeBump.getErrors()[0]); } - - if (totalFee > 0) { - CAmount minTotalFee = nOldFeeRate.GetFee(maxNewTxSize) + ::incrementalRelayFee.GetFee(maxNewTxSize); - if (totalFee < minTotalFee) { - throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("Insufficient totalFee, must be at least %s (oldFee %s + incrementalFee %s)", - FormatMoney(minTotalFee), FormatMoney(nOldFeeRate.GetFee(maxNewTxSize)), FormatMoney(::incrementalRelayFee.GetFee(maxNewTxSize)))); - } - CAmount requiredFee = CWallet::GetRequiredFee(maxNewTxSize); - if (totalFee < requiredFee ) { - throw JSONRPCError(RPC_INVALID_PARAMETER, strprintf("Insufficient totalFee (cannot be less than required fee %s)", - FormatMoney(requiredFee))); - } - nNewFee = totalFee; - nNewFeeRate = CFeeRate(totalFee, maxNewTxSize); - } else { - // if user specified a confirm target then don't consider any global payTxFee - if (specifiedConfirmTarget) { - nNewFee = CWallet::GetMinimumFee(maxNewTxSize, newConfirmTarget, mempool, CAmount(0)); - } - // otherwise use the regular wallet logic to select payTxFee or default confirm target - else { - nNewFee = CWallet::GetMinimumFee(maxNewTxSize, newConfirmTarget, mempool); - } - - nNewFeeRate = CFeeRate(nNewFee, maxNewTxSize); - - // New fee rate must be at least old rate + minimum incremental relay rate - // walletIncrementalRelayFee.GetFeePerK() should be exact, because it's initialized - // in that unit (fee per kb). - // However, nOldFeeRate is a calculated value from the tx fee/size, so - // add 1 satoshi to the result, because it may have been rounded down. - if (nNewFeeRate.GetFeePerK() < nOldFeeRate.GetFeePerK() + 1 + walletIncrementalRelayFee.GetFeePerK()) { - nNewFeeRate = CFeeRate(nOldFeeRate.GetFeePerK() + 1 + walletIncrementalRelayFee.GetFeePerK()); - nNewFee = nNewFeeRate.GetFee(maxNewTxSize); - } - } - - // Check that in all cases the new fee doesn't violate maxTxFee - if (nNewFee > maxTxFee) { - throw JSONRPCError(RPC_WALLET_ERROR, - strprintf("Specified or calculated fee %s is too high (cannot be higher than maxTxFee %s)", - FormatMoney(nNewFee), FormatMoney(maxTxFee))); - } - - // check that fee rate is higher than mempool's minimum fee - // (no point in bumping fee if we know that the new tx won't be accepted to the mempool) - // This may occur if the user set TotalFee or paytxfee too low, if fallbackfee is too low, or, perhaps, - // in a rare situation where the mempool minimum fee increased significantly since the fee estimation just a - // moment earlier. In this case, we report an error to the user, who may use totalFee to make an adjustment. - CFeeRate minMempoolFeeRate = mempool.GetMinFee(GetArg("-maxmempool", DEFAULT_MAX_MEMPOOL_SIZE) * 1000000); - if (nNewFeeRate.GetFeePerK() < minMempoolFeeRate.GetFeePerK()) { - throw JSONRPCError(RPC_WALLET_ERROR, strprintf("New fee rate (%s) is less than the minimum fee rate (%s) to get into the mempool. totalFee value should to be at least %s or settxfee value should be at least %s to add transaction.", FormatMoney(nNewFeeRate.GetFeePerK()), FormatMoney(minMempoolFeeRate.GetFeePerK()), FormatMoney(minMempoolFeeRate.GetFee(maxNewTxSize)), FormatMoney(minMempoolFeeRate.GetFeePerK()))); - } - - // Now modify the output to increase the fee. - // If the output is not large enough to pay the fee, fail. - CAmount nDelta = nNewFee - nOldFee; - assert(nDelta > 0); - CMutableTransaction tx(*(wtx.tx)); - CTxOut* poutput = &(tx.vout[nOutput]); - if (poutput->nValue < nDelta) { - throw JSONRPCError(RPC_WALLET_ERROR, "Change output is too small to bump the fee"); - } - - // If the output would become dust, discard it (converting the dust to fee) - poutput->nValue -= nDelta; - if (poutput->nValue <= poutput->GetDustThreshold(::dustRelayFee)) { - LogPrint(BCLog::RPC, "Bumping fee and discarding dust output\n"); - nNewFee += poutput->nValue; - tx.vout.erase(tx.vout.begin() + nOutput); - } - - // Mark new tx not replaceable, if requested. - if (!replaceable) { - for (auto& input : tx.vin) { - if (input.nSequence < 0xfffffffe) input.nSequence = 0xfffffffe; - } - } - - // sign the new tx - CTransaction txNewConst(tx); - int nIn = 0; - for (auto& input : tx.vin) { - std::map<uint256, CWalletTx>::const_iterator mi = pwallet->mapWallet.find(input.prevout.hash); - assert(mi != pwallet->mapWallet.end() && input.prevout.n < mi->second.tx->vout.size()); - const CScript& scriptPubKey = mi->second.tx->vout[input.prevout.n].scriptPubKey; - const CAmount& amount = mi->second.tx->vout[input.prevout.n].nValue; - SignatureData sigdata; - if (!ProduceSignature(TransactionSignatureCreator(pwallet, &txNewConst, nIn, amount, SIGHASH_ALL), scriptPubKey, sigdata)) { - throw JSONRPCError(RPC_WALLET_ERROR, "Can't sign transaction."); - } - UpdateTransaction(tx, nIn, sigdata); - nIn++; - } - - // commit/broadcast the tx - CReserveKey reservekey(pwallet); - CWalletTx wtxBumped(pwallet, MakeTransactionRef(std::move(tx))); - wtxBumped.mapValue = wtx.mapValue; - wtxBumped.mapValue["replaces_txid"] = hash.ToString(); - wtxBumped.vOrderForm = wtx.vOrderForm; - wtxBumped.strFromAccount = wtx.strFromAccount; - wtxBumped.fTimeReceivedIsTxTime = true; - wtxBumped.fFromMe = true; - CValidationState state; - if (!pwallet->CommitTransaction(wtxBumped, reservekey, g_connman.get(), state)) { - // NOTE: CommitTransaction never returns false, so this should never happen. - throw JSONRPCError(RPC_WALLET_ERROR, strprintf("Error: The transaction was rejected! Reason given: %s", state.GetRejectReason())); - } - - UniValue vErrors(UniValue::VARR); - if (state.IsInvalid()) { - // This can happen if the mempool rejected the transaction. Report - // what happened in the "errors" response. - vErrors.push_back(strprintf("Error: The transaction was rejected: %s", FormatStateMessage(state))); - } - - // mark the original tx as bumped - if (!pwallet->MarkReplaced(wtx.GetHash(), wtxBumped.GetHash())) { - // TODO: see if JSON-RPC has a standard way of returning a response - // along with an exception. It would be good to return information about - // wtxBumped to the caller even if marking the original transaction - // replaced does not succeed for some reason. - vErrors.push_back("Error: Created new bumpfee transaction but could not mark the original transaction as replaced."); - } - UniValue result(UniValue::VOBJ); - result.push_back(Pair("txid", wtxBumped.GetHash().GetHex())); - result.push_back(Pair("origfee", ValueFromAmount(nOldFee))); - result.push_back(Pair("fee", ValueFromAmount(nNewFee))); - result.push_back(Pair("errors", vErrors)); + result.push_back(Pair("txid", feeBump.getBumpedTxId().GetHex())); + result.push_back(Pair("origfee", ValueFromAmount(feeBump.getOldFee()))); + result.push_back(Pair("fee", ValueFromAmount(feeBump.getNewFee()))); + UniValue errors(UniValue::VARR); + for (const std::string& err: feeBump.getErrors()) + errors.push_back(err); + result.push_back(errors); return result; } diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp index 68d4bc35ee..186d3c5cd3 100644 --- a/src/wallet/wallet.cpp +++ b/src/wallet/wallet.cpp @@ -16,6 +16,7 @@ #include "validation.h" #include "net.h" #include "policy/policy.h" +#include "policy/rbf.h" #include "primitives/block.h" #include "primitives/transaction.h" #include "script/script.h" @@ -2255,6 +2256,26 @@ bool CWallet::SelectCoins(const std::vector<COutput>& vAvailableCoins, const CAm return res; } +bool CWallet::SignTransaction(CMutableTransaction &tx) +{ + // sign the new tx + CTransaction txNewConst(tx); + int nIn = 0; + for (auto& input : tx.vin) { + std::map<uint256, CWalletTx>::const_iterator mi = mapWallet.find(input.prevout.hash); + assert(mi != mapWallet.end() && input.prevout.n < mi->second.tx->vout.size()); + const CScript& scriptPubKey = mi->second.tx->vout[input.prevout.n].scriptPubKey; + const CAmount& amount = mi->second.tx->vout[input.prevout.n].nValue; + SignatureData sigdata; + if (!ProduceSignature(TransactionSignatureCreator(this, &txNewConst, nIn, amount, SIGHASH_ALL), scriptPubKey, sigdata)) { + return false; + } + UpdateTransaction(tx, nIn, sigdata); + nIn++; + } + return true; +} + bool CWallet::FundTransaction(CMutableTransaction& tx, CAmount& nFeeRet, bool overrideEstimatedFeeRate, const CFeeRate& specificFeeRate, int& nChangePosInOut, std::string& strFailReason, bool includeWatching, bool lockUnspents, const std::set<int>& setSubtractFeeFromOutputs, bool keepReserveKey, const CTxDestination& destChange) { std::vector<CRecipient> vecSend; diff --git a/src/wallet/wallet.h b/src/wallet/wallet.h index ccede60097..c714ddd090 100644 --- a/src/wallet/wallet.h +++ b/src/wallet/wallet.h @@ -867,6 +867,7 @@ public: * calling CreateTransaction(); */ bool FundTransaction(CMutableTransaction& tx, CAmount& nFeeRet, bool overrideEstimatedFeeRate, const CFeeRate& specificFeeRate, int& nChangePosInOut, std::string& strFailReason, bool includeWatching, bool lockUnspents, const std::set<int>& setSubtractFeeFromOutputs, bool keepReserveKey = true, const CTxDestination& destChange = CNoDestination()); + bool SignTransaction(CMutableTransaction& tx); /** * Create a new transaction paying the recipients with a set of coins @@ -881,7 +882,7 @@ public: bool AddAccountingEntry(const CAccountingEntry&); bool AddAccountingEntry(const CAccountingEntry&, CWalletDB *pwalletdb); template <typename ContainerType> - bool DummySignTx(CMutableTransaction &txNew, const ContainerType &coins); + bool DummySignTx(CMutableTransaction &txNew, const ContainerType &coins) const; static CFeeRate minTxFee; static CFeeRate fallbackFee; @@ -1125,7 +1126,7 @@ public: // ContainerType is meant to hold pair<CWalletTx *, int>, and be iterable // so that each entry corresponds to each vIn, in order. template <typename ContainerType> -bool CWallet::DummySignTx(CMutableTransaction &txNew, const ContainerType &coins) +bool CWallet::DummySignTx(CMutableTransaction &txNew, const ContainerType &coins) const { // Fill in dummy signatures for fee calculation. int nIn = 0; |