tbetter fees estimates - electrum - Electrum Bitcoin wallet
HTML git clone https://git.parazyd.org/electrum
DIR Log
DIR Files
DIR Refs
DIR Submodules
---
DIR commit 67b9a59d349ac49412ef8a83e055125b6dd75f9a
DIR parent cfa833134a832f83957a4d336b86da6c6bb5da9b
HTML Author: ThomasV <thomasv@gitorious>
Date: Sun, 7 Sep 2014 18:45:06 +0200
better fees estimates
Diffstat:
M gui/gtk.py | 13 +++++++------
M gui/qt/amountedit.py | 4 +++-
M gui/qt/main_window.py | 110 +++++++++++++++----------------
M lib/transaction.py | 52 +++++++++++++++++++++----------
M lib/wallet.py | 131 +++++++++++++++++--------------
5 files changed, 169 insertions(+), 141 deletions(-)
---
DIR diff --git a/gui/gtk.py b/gui/gtk.py
t@@ -164,7 +164,7 @@ def run_settings_dialog(self):
fee_label.set_size_request(150,10)
fee_label.show()
fee.pack_start(fee_label,False, False, 10)
- fee_entry.set_text( str( Decimal(self.wallet.fee) /100000000 ) )
+ fee_entry.set_text( str( Decimal(self.wallet.fee_per_kb) /100000000 ) )
fee_entry.connect('changed', numbify, False)
fee_entry.show()
fee.pack_start(fee_entry,False,False, 10)
t@@ -686,12 +686,13 @@ class ElectrumWindow:
if not is_fee: fee = None
if amount is None:
return
- #assume two outputs - one for change
- inputs, total, fee = self.wallet.choose_tx_inputs( amount, fee, 2 )
+ tx = self.wallet.make_unsigned_transaction([('op_return', 'dummy_tx', amount)], fee)
if not is_fee:
- fee_entry.set_text( str( Decimal( fee ) / 100000000 ) )
- self.fee_box.show()
- if inputs:
+ if tx:
+ fee = tx.get_fee()
+ fee_entry.set_text( str( Decimal( fee ) / 100000000 ) )
+ self.fee_box.show()
+ if tx:
amount_entry.modify_text(Gtk.StateType.NORMAL, Gdk.color_parse("#000000"))
fee_entry.modify_text(Gtk.StateType.NORMAL, Gdk.color_parse("#000000"))
send_button.set_sensitive(True)
DIR diff --git a/gui/qt/amountedit.py b/gui/qt/amountedit.py
t@@ -14,6 +14,7 @@ class MyLineEdit(QLineEdit):
self.frozen.emit()
class AmountEdit(MyLineEdit):
+ shortcut = pyqtSignal()
def __init__(self, base_unit, is_int = False, parent=None):
QLineEdit.__init__(self, parent)
t@@ -29,7 +30,8 @@ class AmountEdit(MyLineEdit):
def numbify(self):
text = unicode(self.text()).strip()
if text == '!':
- self.is_shortcut = True
+ self.shortcut.emit()
+ return
pos = self.cursorPosition()
chars = '0123456789'
if not self.is_int: chars +='.'
DIR diff --git a/gui/qt/main_window.py b/gui/qt/main_window.py
t@@ -911,51 +911,49 @@ class ElectrumWindow(QMainWindow):
self.fee_e_help = HelpButton(msg)
grid.addWidget(self.fee_e_help, 5, 3)
self.update_fee_edit()
-
self.send_button = EnterButton(_("Send"), self.do_send)
grid.addWidget(self.send_button, 6, 1)
-
b = EnterButton(_("Clear"), self.do_clear)
grid.addWidget(b, 6, 2)
-
self.payto_sig = QLabel('')
grid.addWidget(self.payto_sig, 7, 0, 1, 4)
-
- #QShortcut(QKeySequence("Up"), w, w.focusPreviousChild)
- #QShortcut(QKeySequence("Down"), w, w.focusNextChild)
w.setLayout(grid)
- def entry_changed( is_fee ):
+ def on_shortcut():
+ sendable = self.get_sendable_balance()
+ inputs = self.get_coins()
+ for i in inputs: self.wallet.add_input_info(i)
+ output = ('address', self.payto_e.payto_address, sendable) if self.payto_e.payto_address else ('op_return', 'dummy_tx', sendable)
+ dummy_tx = Transaction(inputs, [output])
+ fee = self.wallet.estimated_fee(dummy_tx)
+ self.amount_e.setAmount(sendable-fee)
+ self.amount_e.textEdited.emit("")
+ self.fee_e.setAmount(fee)
- if self.amount_e.is_shortcut:
- self.amount_e.is_shortcut = False
- sendable = self.get_sendable_balance()
- # there is only one output because we are completely spending inputs
- inputs, total, fee = self.wallet.choose_tx_inputs( sendable, 0, 1, coins = self.get_coins())
- fee = self.wallet.estimated_fee(inputs, 1)
- amount = total - fee
- self.amount_e.setAmount(amount)
- self.amount_e.textEdited.emit("")
- self.fee_e.setAmount(fee)
- return
+ self.amount_e.shortcut.connect(on_shortcut)
- amount = self.amount_e.get_amount()
- fee = self.fee_e.get_amount()
+ def text_edited(is_fee):
outputs = self.payto_e.get_outputs()
-
- if not is_fee:
- fee = None
-
+ amount = self.amount_e.get_amount()
+ fee = self.fee_e.get_amount() if is_fee else None
if amount is None:
self.fee_e.setAmount(None)
- not_enough_funds = False
+ self.not_enough_funds = False
else:
- inputs, total, fee = self.wallet.choose_tx_inputs(amount, fee, len(outputs), coins = self.get_coins())
- not_enough_funds = len(inputs) == 0
+ if not outputs:
+ outputs = [('op_return', 'dummy_tx', amount)]
+ tx = self.wallet.make_unsigned_transaction(outputs, fee, coins = self.get_coins())
+ self.not_enough_funds = (tx is None)
if not is_fee:
+ fee = tx.get_fee() if tx else None
self.fee_e.setAmount(fee)
-
- if not not_enough_funds:
+
+ self.payto_e.textChanged.connect(lambda:text_edited(False))
+ self.amount_e.textEdited.connect(lambda:text_edited(False))
+ self.fee_e.textEdited.connect(lambda:text_edited(True))
+
+ def entry_changed():
+ if not self.not_enough_funds:
palette = QPalette()
palette.setColor(self.amount_e.foregroundRole(), QColor('black'))
text = ""
t@@ -965,13 +963,12 @@ class ElectrumWindow(QMainWindow):
text = _( "Not enough funds" )
c, u = self.wallet.get_frozen_balance()
if c+u: text += ' (' + self.format_amount(c+u).strip() + ' ' + self.base_unit() + ' ' +_("are frozen") + ')'
-
self.statusBar().showMessage(text)
self.amount_e.setPalette(palette)
self.fee_e.setPalette(palette)
- self.amount_e.textChanged.connect(lambda: entry_changed(False) )
- self.fee_e.textChanged.connect(lambda: entry_changed(True) )
+ self.amount_e.textChanged.connect(entry_changed)
+ self.fee_e.textChanged.connect(entry_changed)
run_hook('create_send_tab', grid)
return w
t@@ -1057,27 +1054,17 @@ class ElectrumWindow(QMainWindow):
QMessageBox.warning(self, _('Error'), _('Invalid Amount'), _('OK'))
return
- amount = sum(map(lambda x:x[2], outputs))
-
fee = self.fee_e.get_amount()
if fee is None:
QMessageBox.warning(self, _('Error'), _('Invalid Fee'), _('OK'))
return
+ amount = sum(map(lambda x:x[2], outputs))
confirm_amount = self.config.get('confirm_amount', 100000000)
if amount >= confirm_amount:
o = '\n'.join(map(lambda x:x[1], outputs))
if not self.question(_("send %(amount)s to %(address)s?")%{ 'amount' : self.format_amount(amount) + ' '+ self.base_unit(), 'address' : o}):
return
-
- if not self.config.get('can_edit_fees', False):
- if not self.question(_("A fee of %(fee)s will be added to this transaction.\nProceed?")%{ 'fee' : self.format_amount(fee) + ' '+ self.base_unit()}):
- return
- else:
- confirm_fee = self.config.get('confirm_fee', 100000)
- if fee >= confirm_fee:
- if not self.question(_("The fee for this transaction seems unusually high.\nAre you really sure you want to pay %(fee)s in fees?")%{ 'fee' : self.format_amount(fee) + ' '+ self.base_unit()}):
- return
coins = self.get_coins()
return outputs, fee, label, coins
t@@ -1088,23 +1075,35 @@ class ElectrumWindow(QMainWindow):
if not r:
return
outputs, fee, label, coins = r
- self.send_tx(outputs, fee, label, coins)
-
-
- @protected
- def send_tx(self, outputs, fee, label, coins, password):
- self.send_button.setDisabled(True)
- # first, create an unsigned tx
try:
tx = self.wallet.make_unsigned_transaction(outputs, fee, None, coins = coins)
tx.error = None
except Exception as e:
traceback.print_exc(file=sys.stdout)
self.show_message(str(e))
- self.send_button.setDisabled(False)
return
+ if tx.requires_fee(self.wallet.verifier) and tx.get_fee() < MIN_RELAY_TX_FEE:
+ QMessageBox.warning(self, _('Error'), _("This transaction requires a higher fee, or it will not be propagated by the network."), _('OK'))
+ return
+
+ if not self.config.get('can_edit_fees', False):
+ if not self.question(_("A fee of %(fee)s will be added to this transaction.\nProceed?")%{ 'fee' : self.format_amount(fee) + ' '+ self.base_unit()}):
+ return
+ else:
+ confirm_fee = self.config.get('confirm_fee', 100000)
+ if fee >= confirm_fee:
+ if not self.question(_("The fee for this transaction seems unusually high.\nAre you really sure you want to pay %(fee)s in fees?")%{ 'fee' : self.format_amount(fee) + ' '+ self.base_unit()}):
+ return
+
+ self.send_tx(tx, label)
+
+
+ @protected
+ def send_tx(self, tx, label, password):
+ self.send_button.setDisabled(True)
+
# call hook to see if plugin needs gui interaction
run_hook('send_tx', tx)
t@@ -1126,10 +1125,6 @@ class ElectrumWindow(QMainWindow):
self.show_message(tx.error)
self.send_button.setDisabled(False)
return
- if tx.requires_fee(self.wallet.verifier) and fee < MIN_RELAY_TX_FEE:
- QMessageBox.warning(self, _('Error'), _("This transaction requires a higher fee, or it will not be propagated by the network."), _('OK'))
- self.send_button.setDisabled(False)
- return
if label:
self.wallet.set_label(tx.hash(), label)
t@@ -1274,6 +1269,7 @@ class ElectrumWindow(QMainWindow):
def do_clear(self):
+ self.not_enough_funds = False
self.payto_e.is_pr = False
self.payto_sig.setVisible(False)
for e in [self.payto_e, self.message_e, self.amount_e, self.fee_e]:
t@@ -2480,7 +2476,7 @@ class ElectrumWindow(QMainWindow):
if not d.exec_():
return
- fee = self.wallet.fee
+ fee = self.wallet.fee_per_kb
tx = Transaction.sweep(get_pk(), self.network, get_address(), fee)
self.show_transaction(tx)
t@@ -2568,7 +2564,7 @@ class ElectrumWindow(QMainWindow):
fee_label = QLabel(_('Transaction fee per kb') + ':')
fee_help = HelpButton(_('Fee per kilobyte of transaction.') + '\n' + _('Recommended value') + ': ' + self.format_amount(10000) + ' ' + self.base_unit())
fee_e = BTCAmountEdit(self.get_decimal_point)
- fee_e.setAmount(self.wallet.fee)
+ fee_e.setAmount(self.wallet.fee_per_kb)
if not self.config.is_modifiable('fee_per_kb'):
for w in [fee_e, fee_label]: w.setEnabled(False)
def on_fee():
DIR diff --git a/lib/transaction.py b/lib/transaction.py
t@@ -32,6 +32,7 @@ import struct
import struct
import StringIO
import mmap
+import random
NO_SIGNATURE = 'ff'
t@@ -497,7 +498,7 @@ class Transaction:
def __str__(self):
if self.raw is None:
- self.raw = self.serialize(self.inputs, self.outputs, for_sig = None) # for_sig=-1 means do not sign
+ self.raw = self.serialize()
return self.raw
def __init__(self, inputs, outputs, locktime=0):
t@@ -519,7 +520,6 @@ class Transaction:
self.outputs = map(lambda x: (x['type'], x['address'], x['value']), d['outputs'])
self.locktime = d['lockTime']
-
@classmethod
def sweep(klass, privkeys, network, to_address, fee):
inputs = []
t@@ -594,8 +594,14 @@ class Transaction:
return script
- @classmethod
- def serialize(klass, inputs, outputs, for_sig = None ):
+ def serialize(self, for_sig=None):
+ # for_sig:
+ # -1 : do not sign, estimate length
+ # i>=0 : sign input i
+ # None : add all signatures
+
+ inputs = self.inputs
+ outputs = self.outputs
s = int_to_hex(1,4) # version
s += var_int( len(inputs) ) # number of inputs
t@@ -613,11 +619,15 @@ class Transaction:
signatures = filter(lambda x: x is not None, x_signatures)
is_complete = len(signatures) == num_sig
- if for_sig is None:
+ if for_sig in [-1, None]:
# if we have enough signatures, we use the actual pubkeys
# use extended pubkeys (with bip32 derivation)
sig_list = []
- if is_complete:
+ if for_sig == -1:
+ # we assume that signature will be 0x48 bytes long
+ pubkeys = txin['pubkeys']
+ sig_list = [ "00"* 0x48 ] * num_sig
+ elif is_complete:
pubkeys = txin['pubkeys']
for signature in signatures:
sig_list.append(signature + '01')
t@@ -633,13 +643,14 @@ class Transaction:
else:
script = '00' # op_0
script += sig_list
- redeem_script = klass.multisig_script(pubkeys,2)
+ redeem_script = self.multisig_script(pubkeys,2)
script += push_script(redeem_script)
elif for_sig==i:
- script = txin['redeemScript'] if p2sh else klass.pay_script('address', address)
+ script = txin['redeemScript'] if p2sh else self.pay_script('address', address)
else:
script = ''
+
s += var_int( len(script)/2 ) # script length
s += script
s += "ffffffff" # sequence
t@@ -648,7 +659,7 @@ class Transaction:
for output in outputs:
type, addr, amount = output
s += int_to_hex( amount, 8) # amount
- script = klass.pay_script(type, addr)
+ script = self.pay_script(type, addr)
s += var_int( len(script)/2 ) # script length
s += script # script
s += int_to_hex(0,4) # lock time
t@@ -656,10 +667,8 @@ class Transaction:
s += int_to_hex(1, 4) # hash type
return s
-
def tx_for_sig(self,i):
- return self.serialize(self.inputs, self.outputs, for_sig = i)
-
+ return self.serialize(for_sig = i)
def hash(self):
return Hash(self.raw.decode('hex') )[::-1].encode('hex')
t@@ -672,8 +681,20 @@ class Transaction:
txin['signatures'][ii] = sig
txin['x_pubkeys'][ii] = pubkey
self.inputs[i] = txin
- self.raw = self.serialize(self.inputs, self.outputs)
+ self.raw = self.serialize()
+
+ def add_input(self, input):
+ self.inputs.append(input)
+ self.raw = None
+ def input_value(self):
+ return sum([x['value'] for x in self.inputs])
+
+ def output_value(self):
+ return sum([ x[2] for x in self.outputs])
+
+ def get_fee(self):
+ return self.input_value() - self.output_value()
def signature_count(self):
r = 0
t@@ -747,9 +768,8 @@ class Transaction:
assert public_key.verify_digest( sig, for_sig, sigdecode = ecdsa.util.sigdecode_der)
self.add_signature(i, pubkey, sig.encode('hex'))
-
print_error("is_complete", self.is_complete())
- self.raw = self.serialize( self.inputs, self.outputs )
+ self.raw = self.serialize()
def add_pubkey_addresses(self, txlist):
t@@ -861,7 +881,7 @@ class Transaction:
def requires_fee(self, verifier):
# see https://en.bitcoin.it/wiki/Transaction_fees
threshold = 57600000
- size = len(str(self))/2
+ size = len(self.serialize(-1))/2
if size >= 10000:
return True
DIR diff --git a/lib/wallet.py b/lib/wallet.py
t@@ -42,6 +42,7 @@ from mnemonic import Mnemonic
COINBASE_MATURITY = 100
DUST_THRESHOLD = 5430
+
# internal ID for imported account
IMPORTED_ACCOUNT = '/x'
t@@ -163,7 +164,7 @@ class Abstract_Wallet(object):
self.history = storage.get('addr_history',{}) # address -> list(txid, height)
- self.fee = int(storage.get('fee_per_kb', 10000))
+ self.fee_per_kb = int(storage.get('fee_per_kb', 10000))
self.next_addresses = storage.get('next_addresses',{})
t@@ -579,60 +580,13 @@ class Abstract_Wallet(object):
coins = coins[1:] + [ coins[0] ]
return [x[1] for x in coins]
- def choose_tx_inputs( self, amount, fixed_fee, num_outputs, domain = None, coins = None ):
- """ todo: minimize tx size """
- total = 0
- fee = self.fee if fixed_fee is None else fixed_fee
-
- if not coins:
- if domain is None:
- domain = self.addresses(True)
- for i in self.frozen_addresses:
- if i in domain: domain.remove(i)
- coins = self.get_unspent_coins(domain)
-
- inputs = []
- for item in coins:
- if item.get('coinbase') and item.get('height') + COINBASE_MATURITY > self.network.get_local_height():
- continue
- v = item.get('value')
- total += v
- inputs.append(item)
- fee = self.estimated_fee(inputs, num_outputs) if fixed_fee is None else fixed_fee
- if total >= amount + fee: break
- else:
- inputs = []
- return inputs, total, fee
def set_fee(self, fee):
- if self.fee != fee:
- self.fee = fee
- self.storage.put('fee_per_kb', self.fee, True)
+ if self.fee_per_kb != fee:
+ self.fee_per_kb = fee
+ self.storage.put('fee_per_kb', self.fee_per_kb, True)
- def estimated_fee(self, inputs, num_outputs):
- estimated_size = len(inputs) * 180 + num_outputs * 34 # this assumes non-compressed keys
- fee = self.fee * int(math.ceil(estimated_size/1000.))
- return fee
-
- def add_tx_change( self, inputs, outputs, amount, fee, total, change_addr=None):
- "add change to a transaction"
- change_amount = total - ( amount + fee )
- if change_amount > DUST_THRESHOLD:
- if not change_addr:
-
- # send change to one of the accounts involved in the tx
- address = inputs[0].get('address')
- account, _ = self.get_address_index(address)
-
- if not self.use_change or account == IMPORTED_ACCOUNT:
- change_addr = address
- else:
- change_addr = self.accounts[account].get_addresses(1)[-self.gap_limit_for_change]
-
- # Insert the change output at a random position in the outputs
- posn = random.randint(0, len(outputs))
- outputs[posn:posn] = [( 'address', change_addr, change_amount)]
def get_history(self, address):
with self.lock:
t@@ -754,22 +708,77 @@ class Abstract_Wallet(object):
return default_label
- def make_unsigned_transaction(self, outputs, fee=None, change_addr=None, domain=None, coins=None ):
+ def estimated_fee(self, tx):
+ estimated_size = len(tx.serialize(-1))/2
+ #print_error('estimated_size', estimated_size)
+ return int(self.fee_per_kb*estimated_size/1024.)
+
+ def make_unsigned_transaction(self, outputs, fixed_fee=None, change_addr=None, domain=None, coins=None ):
+ # check outputs
for type, data, value in outputs:
if type == 'op_return':
assert len(data) < 41, "string too long"
- assert value == 0
+ #assert value == 0
if type == 'address':
assert is_address(data), "Address " + data + " is invalid!"
+
+ # get coins
+ if not coins:
+ if domain is None:
+ domain = self.addresses(True)
+ for i in self.frozen_addresses:
+ if i in domain: domain.remove(i)
+ coins = self.get_unspent_coins(domain)
+
amount = sum( map(lambda x:x[2], outputs) )
- inputs, total, fee = self.choose_tx_inputs( amount, fee, len(outputs), domain, coins )
- if not inputs:
- raise ValueError("Not enough funds")
- for txin in inputs:
- self.add_input_info(txin)
- self.add_tx_change(inputs, outputs, amount, fee, total, change_addr)
- run_hook('make_unsigned_transaction', inputs, outputs)
- return Transaction(inputs, outputs)
+ total = 0
+ inputs = []
+ tx = Transaction(inputs, outputs)
+ for item in coins:
+ if item.get('coinbase') and item.get('height') + COINBASE_MATURITY > self.network.get_local_height():
+ continue
+ v = item.get('value')
+ total += v
+ self.add_input_info(item)
+ tx.add_input(item)
+ fee = fixed_fee if fixed_fee is not None else self.estimated_fee(tx)
+ if total >= amount + fee: break
+ else:
+ print_error("Not enough funds", total, amount, fee)
+ return None
+
+ # change address
+ if not change_addr:
+ # send change to one of the accounts involved in the tx
+ address = inputs[0].get('address')
+ account, _ = self.get_address_index(address)
+ if not self.use_change or account == IMPORTED_ACCOUNT:
+ change_addr = address
+ else:
+ change_addr = self.accounts[account].get_addresses(1)[-self.gap_limit_for_change]
+
+ # if change is above dust threshold, add a change output.
+ change_amount = total - ( amount + fee )
+ if change_amount > DUST_THRESHOLD:
+ # Insert the change output at a random position in the outputs
+ posn = random.randint(0, len(tx.outputs))
+ tx.outputs[posn:posn] = [( 'address', change_addr, change_amount)]
+ # recompute fee including change output
+ fee = fixed_fee if fixed_fee is not None else self.estimated_fee(tx)
+ # remove change output
+ tx.outputs.pop(posn)
+ # if change is still above dust threshold, re-add change output.
+ change_amount = total - ( amount + fee )
+ if change_amount > DUST_THRESHOLD:
+ tx.outputs[posn:posn] = [( 'address', change_addr, change_amount)]
+ print_error('change', change_amount)
+ else:
+ print_error('not keeping dust', change_amount)
+ else:
+ print_error('not keeping dust', change_amount)
+
+ run_hook('make_unsigned_transaction', tx)
+ return tx
def mktx(self, outputs, password, fee=None, change_addr=None, domain= None, coins = None ):
tx = self.make_unsigned_transaction(outputs, fee, change_addr, domain, coins)