electrum

Electrum Bitcoin wallet
git clone https://git.parazyd.org/electrum
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commit 2b8d801b366a12a6eb84f49ce2ca23b772d9d045
parent bd32b88f625a698bcc466faa17a3adb58ed229a4
Author: ThomasV <thomasv@electrum.org>
Date:   Fri,  9 Nov 2018 16:33:29 +0100

if possible, batch new transaction with existing rbf transaction

Diffstat:
Melectrum/address_synchronizer.py | 6++++++
Melectrum/coinchooser.py | 8+++++---
Melectrum/gui/qt/transaction_dialog.py | 2+-
Melectrum/transaction.py | 13+++++++++++--
Melectrum/wallet.py | 55++++++++++++++++++++++++++++++++-----------------------
5 files changed, 55 insertions(+), 29 deletions(-)

diff --git a/electrum/address_synchronizer.py b/electrum/address_synchronizer.py @@ -484,6 +484,12 @@ class AddressSynchronizer(PrintError): self.threadlocal_cache.local_height = orig_val return f + def get_unconfirmed_tx(self): + for tx_hash, tx_mined_status, delta, balance in self.get_history(): + if tx_mined_status.conf <= 0 and delta < 0: + tx = self.transactions.get(tx_hash) + return tx + @with_local_height_cached def get_history(self, domain=None): # get domain diff --git a/electrum/coinchooser.py b/electrum/coinchooser.py @@ -187,7 +187,7 @@ class CoinChooserBase(PrintError): self.print_error('not keeping dust', dust) return change - def make_tx(self, coins, outputs, change_addrs, fee_estimator, + def make_tx(self, coins, inputs, outputs, change_addrs, fee_estimator, dust_threshold): """Select unspent coins to spend to pay outputs. If the change is greater than dust_threshold (after adding the change output to @@ -202,7 +202,9 @@ class CoinChooserBase(PrintError): self.p = PRNG(''.join(sorted(utxos))) # Copy the outputs so when adding change we don't modify "outputs" - tx = Transaction.from_io([], outputs[:]) + tx = Transaction.from_io(inputs[:], outputs[:]) + v = tx.input_value() + # Weight of the transaction with no inputs and no change # Note: this will use legacy tx serialization as the need for "segwit" # would be detected from inputs. The only side effect should be that the @@ -230,7 +232,7 @@ class CoinChooserBase(PrintError): def sufficient_funds(buckets): '''Given a list of buckets, return True if it has enough value to pay for the transaction''' - total_input = sum(bucket.value for bucket in buckets) + total_input = v + sum(bucket.value for bucket in buckets) total_weight = get_tx_weight(buckets) return total_input >= spent_amount + fee_estimator_w(total_weight) diff --git a/electrum/gui/qt/transaction_dialog.py b/electrum/gui/qt/transaction_dialog.py @@ -87,7 +87,7 @@ class TxDialog(QDialog, MessageBoxMixin): # if the wallet can populate the inputs with more info, do it now. # as a result, e.g. we might learn an imported address tx is segwit, # in which case it's ok to display txid - self.wallet.add_input_info_to_all_inputs(tx) + tx.add_inputs_info(self.wallet) self.setMinimumWidth(950) self.setWindowTitle(_("Transaction")) diff --git a/electrum/transaction.py b/electrum/transaction.py @@ -763,6 +763,17 @@ class Transaction: txin['witness'] = None # force re-serialization self.raw = None + def add_inputs_info(self, wallet): + if self.is_complete(): + return + for txin in self.inputs(): + wallet.add_input_info(txin) + + def remove_signatures(self): + for txin in self.inputs(): + txin['signatures'] = [None] * len(txin['signatures']) + assert not self.is_complete() + def deserialize(self, force_full_parse=False): if self.raw is None: return @@ -1199,8 +1210,6 @@ class Transaction: return s, r def is_complete(self): - if not self.is_partial_originally: - return True s, r = self.signature_count() return r == s diff --git a/electrum/wallet.py b/electrum/wallet.py @@ -536,7 +536,7 @@ class Abstract_Wallet(AddressSynchronizer): def dust_threshold(self): return dust_threshold(self.network) - def make_unsigned_transaction(self, inputs, outputs, config, fixed_fee=None, + def make_unsigned_transaction(self, coins, outputs, config, fixed_fee=None, change_addr=None, is_sweep=False): # check outputs i_max = None @@ -550,13 +550,13 @@ class Abstract_Wallet(AddressSynchronizer): i_max = i # Avoid index-out-of-range with inputs[0] below - if not inputs: + if not coins: raise NotEnoughFunds() if fixed_fee is None and config.fee_per_kb() is None: raise NoDynamicFeeEstimates() - for item in inputs: + for item in coins: self.add_input_info(item) # change address @@ -591,19 +591,34 @@ class Abstract_Wallet(AddressSynchronizer): # Let the coin chooser select the coins to spend max_change = self.max_change_outputs if self.multiple_change else 1 coin_chooser = coinchooser.get_coin_chooser(config) - tx = coin_chooser.make_tx(inputs, outputs, change_addrs[:max_change], + # If there is an unconfirmed RBF tx, merge with it + base_tx = self.get_unconfirmed_tx() + if base_tx and not base_tx.is_final(): + base_tx = Transaction(base_tx.serialize()) + base_tx.deserialize(force_full_parse=True) + base_tx.remove_signatures() + base_tx.add_inputs_info(self) + base_fee = base_tx.get_fee() + fee_per_byte = Decimal(base_fee) / base_tx.estimated_size() + fee_estimator = lambda size: base_fee + round(fee_per_byte * size) + txi = base_tx.inputs() + txo = list(filter(lambda x: not self.is_change(x[1]), base_tx.outputs())) + else: + txi = [] + txo = [] + tx = coin_chooser.make_tx(coins, txi, outputs[:] + txo, change_addrs[:max_change], fee_estimator, self.dust_threshold()) else: # FIXME?? this might spend inputs with negative effective value... - sendable = sum(map(lambda x:x['value'], inputs)) + sendable = sum(map(lambda x:x['value'], coins)) outputs[i_max] = outputs[i_max]._replace(value=0) - tx = Transaction.from_io(inputs, outputs[:]) + tx = Transaction.from_io(coins, outputs[:]) fee = fee_estimator(tx.estimated_size()) amount = sendable - tx.output_value() - fee if amount < 0: raise NotEnoughFunds() outputs[i_max] = outputs[i_max]._replace(value=amount) - tx = Transaction.from_io(inputs, outputs[:]) + tx = Transaction.from_io(coins, outputs[:]) # Timelock tx to current height. tx.locktime = self.get_local_height() @@ -679,11 +694,10 @@ class Abstract_Wallet(AddressSynchronizer): raise CannotBumpFee(_('Cannot bump fee') + ': ' + _('transaction is final')) tx = Transaction(tx.serialize()) tx.deserialize(force_full_parse=True) # need to parse inputs - inputs = copy.deepcopy(tx.inputs()) - outputs = copy.deepcopy(tx.outputs()) - for txin in inputs: - txin['signatures'] = [None] * len(txin['signatures']) - self.add_input_info(txin) + tx.remove_signatures() + tx.add_inputs_info(self) + inputs = tx.inputs() + outputs = tx.outputs() # use own outputs s = list(filter(lambda x: self.is_mine(x[1]), outputs)) # ... unless there is none @@ -738,26 +752,21 @@ class Abstract_Wallet(AddressSynchronizer): def add_input_info(self, txin): address = self.get_txin_address(txin) if self.is_mine(address): + txin['address'] = address txin['type'] = self.get_txin_type(address) # segwit needs value to sign - if txin.get('value') is None and Transaction.is_input_value_needed(txin): + if txin.get('value') is None: received, spent = self.get_addr_io(address) item = received.get(txin['prevout_hash']+':%d'%txin['prevout_n']) - tx_height, value, is_cb = item - txin['value'] = value + if item: + txin['value'] = item[1] self.add_input_sig_info(txin, address) - def add_input_info_to_all_inputs(self, tx): - if tx.is_complete(): - return - for txin in tx.inputs(): - self.add_input_info(txin) - def can_sign(self, tx): if tx.is_complete(): return False # add info to inputs if we can; otherwise we might return a false negative: - self.add_input_info_to_all_inputs(tx) # though note that this is a side-effect + tx.add_inputs_info(self) for k in self.get_keystores(): if k.can_sign(tx): return True @@ -804,7 +813,7 @@ class Abstract_Wallet(AddressSynchronizer): def sign_transaction(self, tx, password): if self.is_watching_only(): return - self.add_input_info_to_all_inputs(tx) + tx.add_inputs_info(self) # hardware wallets require extra info if any([(isinstance(k, Hardware_KeyStore) and k.can_sign(tx)) for k in self.get_keystores()]): self.add_hw_info(tx)