clean up fees a bit

gui/kivy/uix/dialogs/bump_fee_dialog.py

@@ -3,7 +3,6 @@ from kivy.factory import Factory
 from kivy.properties import ObjectProperty
 from kivy.lang import Builder
 
-from electrum.util import fee_levels
 from electrum_gui.kivy.i18n import _
 
 Builder.load_string('''
@@ -29,7 +28,11 @@ Builder.load_string('''
                 text: _('New Fee')
                 value: ''
         Label:
-            id: tooltip
+            id: tooltip1
+            text: ''
+            size_hint_y: None
+        Label:
+            id: tooltip2
             text: ''
             size_hint_y: None
         Slider:
@@ -72,39 +75,39 @@ class BumpFeeDialog(Factory.Popup):
         self.tx_size = size
         self.callback = callback
         self.config = app.electrum_config
-        self.fee_step = self.config.max_fee_rate() / 10
+        self.mempool = self.config.use_mempool_fees()
-        self.dynfees = self.config.is_dynfee() and self.app.network
+        self.dynfees = self.config.is_dynfee() and self.app.network and self.config.has_dynamic_fees_ready()
         self.ids.old_fee.value = self.app.format_amount_and_units(self.init_fee)
         self.update_slider()
         self.update_text()
 
     def update_text(self):
-        value = int(self.ids.slider.value)
+        fee = self.get_fee()
-        self.ids.new_fee.value = self.app.format_amount_and_units(self.get_fee())
+        self.ids.new_fee.value = self.app.format_amount_and_units(fee)
-        if self.dynfees:
+        pos = int(self.ids.slider.value)
-            value = int(self.ids.slider.value)
+        fee_rate = self.get_fee_rate()
-            self.ids.tooltip.text = fee_levels[value]
+        text, tooltip = self.config.get_fee_text(pos, self.dynfees, self.mempool, fee_rate)
+        self.ids.tooltip1.text = text
+        self.ids.tooltip2.text = tooltip
 
     def update_slider(self):
         slider = self.ids.slider
-        if self.dynfees:
+        maxp, pos, fee_rate = self.config.get_fee_slider(self.dynfees, self.mempool)
-            slider.range = (0, 4)
+        slider.range = (0, maxp)
         slider.step = 1
-            slider.value = 3
+        slider.value = pos
-        else:
-            slider.range = (1, 10)
-            slider.step = 1
-            rate = self.init_fee*1000//self.tx_size
-            slider.value = min( rate * 2 // self.fee_step, 10)
 
-    def get_fee(self):
+    def get_fee_rate(self):
-        value = int(self.ids.slider.value)
+        pos = int(self.ids.slider.value)
         if self.dynfees:
-            if self.config.has_fee_estimates():
+            fee_rate = self.config.depth_to_fee(pos) if self.mempool else self.config.eta_to_fee(pos)
-                dynfee = self.config.dynfee(value)
-                return int(dynfee * self.tx_size // 1000)
         else:
-            return int(value*self.fee_step * self.tx_size // 1000)
+            fee_rate = self.config.static_fee(pos)
+        return fee_rate
+
+    def get_fee(self):
+        fee_rate = self.get_fee_rate()
+        return int(fee_rate * self.tx_size // 1000)
 
     def on_ok(self):
         new_fee = self.get_fee()

gui/kivy/uix/dialogs/fee_dialog.py

@@ -3,7 +3,6 @@ from kivy.factory import Factory
 from kivy.properties import ObjectProperty
 from kivy.lang import Builder
 
-from electrum.util import fee_levels
 from electrum_gui.kivy.i18n import _
 
 Builder.load_string('''

gui/kivy/uix/dialogs/settings.py

@@ -8,7 +8,6 @@ from electrum.i18n import languages
 from electrum_gui.kivy.i18n import _
 from electrum.plugins import run_hook
 from electrum import coinchooser
-from electrum.util import fee_levels
 
 from .choice_dialog import ChoiceDialog
 

gui/qt/main_window.py

@@ -1512,7 +1512,7 @@ class ElectrumWindow(QMainWindow, MessageBoxMixin, PrintError):
             x_fee_address, x_fee_amount = x_fee
             msg.append( _("Additional fees") + ": " + self.format_amount_and_units(x_fee_amount) )
 
-        confirm_rate = 2 * self.config.max_fee_rate()
+        confirm_rate = simple_config.FEERATE_WARNING_HIGH_FEE
         if fee > confirm_rate * tx.estimated_size() / 1000:
             msg.append(_('Warning') + ': ' + _("The fee for this transaction seems unusually high."))
 

gui/qt/transaction_dialog.py

@@ -33,6 +33,7 @@ from PyQt5.QtWidgets import *
 from electrum.bitcoin import base_encode
 from electrum.i18n import _
 from electrum.plugins import run_hook
+from electrum import simple_config
 
 from electrum.util import bfh
 from electrum.wallet import UnrelatedTransactionException
@@ -238,7 +239,11 @@ class TxDialog(QDialog, MessageBoxMixin):
         size_str = _("Size:") + ' %d bytes'% size
         fee_str = _("Fee") + ': %s' % (format_amount(fee) + ' ' + base_unit if fee is not None else _('unknown'))
         if fee is not None:
-            fee_str += '  ( %s ) '%  self.main_window.format_fee_rate(fee/size*1000)
+            fee_rate = fee/size*1000
+            fee_str += '  ( %s ) ' % self.main_window.format_fee_rate(fee_rate)
+            confirm_rate = simple_config.FEERATE_WARNING_HIGH_FEE
+            if fee_rate > confirm_rate:
+                fee_str += ' - ' + _('Warning') + ': ' + _("high fee") + '!'
         self.amount_label.setText(amount_str)
         self.fee_label.setText(fee_str)
         self.size_label.setText(size_str)

lib/bitcoin.py

@@ -108,10 +108,6 @@ NetworkConstants.set_mainnet()
 
 ################################## transactions
 
-FEE_STEP = 10000
-MAX_FEE_RATE = 300000
-
-
 COINBASE_MATURITY = 100
 COIN = 100000000
 

lib/simple_config.py

@@ -5,14 +5,22 @@ import os
 import stat
 
 from copy import deepcopy
+
 from .util import (user_dir, print_error, PrintError,
                    NoDynamicFeeEstimates, format_satoshis)
-
+from .i18n import _
-from .bitcoin import MAX_FEE_RATE
 
 FEE_ETA_TARGETS = [25, 10, 5, 2]
 FEE_DEPTH_TARGETS = [10000000, 5000000, 2000000, 1000000, 500000, 200000, 100000]
 
+# satoshi per kbyte
+FEERATE_MAX_DYNAMIC = 1500000
+FEERATE_WARNING_HIGH_FEE = 600000
+FEERATE_FALLBACK_STATIC_FEE = 150000
+FEERATE_DEFAULT_RELAY = 1000
+FEERATE_STATIC_VALUES = [5000, 10000, 20000, 30000, 50000, 70000, 100000, 150000, 200000, 300000]
+
+
 config = None
 
 
@@ -39,7 +47,6 @@ class SimpleConfig(PrintError):
         2. User configuration (in the user's config directory)
     They are taken in order (1. overrides config options set in 2.)
     """
-    fee_rates = [5000, 10000, 20000, 30000, 50000, 70000, 100000, 150000, 200000, 300000]
 
     def __init__(self, options=None, read_user_config_function=None,
                  read_user_dir_function=None):
@@ -261,13 +268,19 @@ class SimpleConfig(PrintError):
             path = wallet.storage.path
             self.set_key('gui_last_wallet', path)
 
-    def max_fee_rate(self):
+    def impose_hard_limits_on_fee(func):
-        f = self.get('max_fee_rate', MAX_FEE_RATE)
+        def get_fee_within_limits(self, *args, **kwargs):
-        if f==0:
+            fee = func(self, *args, **kwargs)
-            f = MAX_FEE_RATE
+            if fee is None:
-        return f
+                return fee
+            fee = min(FEERATE_MAX_DYNAMIC, fee)
+            fee = max(FEERATE_DEFAULT_RELAY, fee)
+            return fee
+        return get_fee_within_limits
 
+    @impose_hard_limits_on_fee
     def eta_to_fee(self, i):
+        """Returns fee in sat/kbyte."""
         if i < 4:
             j = FEE_ETA_TARGETS[i]
             fee = self.fee_estimates.get(j)
@@ -276,8 +289,6 @@ class SimpleConfig(PrintError):
             fee = self.fee_estimates.get(2)
             if fee is not None:
                 fee += fee/2
-        if fee is not None:
-            fee = min(5*MAX_FEE_RATE, fee)
         return fee
 
     def fee_to_depth(self, target_fee):
@@ -290,7 +301,9 @@ class SimpleConfig(PrintError):
             return 0
         return depth
 
+    @impose_hard_limits_on_fee
     def depth_to_fee(self, i):
+        """Returns fee in sat/kbyte."""
         target = self.depth_target(i)
         depth = 0
         for fee, s in self.mempool_fees:
@@ -305,6 +318,8 @@ class SimpleConfig(PrintError):
         return FEE_DEPTH_TARGETS[i]
 
     def eta_target(self, i):
+        if i == len(FEE_ETA_TARGETS):
+            return 1
         return FEE_ETA_TARGETS[i]
 
     def fee_to_eta(self, fee_per_kb):
@@ -320,7 +335,12 @@ class SimpleConfig(PrintError):
         return "%.1f MB from tip"%(depth/1000000)
 
     def eta_tooltip(self, x):
-        return 'Low fee' if x < 0 else 'Within %d blocks'%x
+        if x < 0:
+            return _('Low fee')
+        elif x == 1:
+            return _('In the next block')
+        else:
+            return _('Within {} blocks').format(x)
 
     def get_fee_status(self):
         dyn = self.is_dynfee()
@@ -331,6 +351,10 @@ class SimpleConfig(PrintError):
         return target
 
     def get_fee_text(self, pos, dyn, mempool, fee_rate):
+        """Returns (text, tooltip) where
+        text is what we target: static fee / num blocks to confirm in / mempool depth
+        tooltip is the corresponding estimate (e.g. num blocks for a static fee)
+        """
         rate_str = (format_satoshis(fee_rate/1000, False, 0, 0, False)  + ' sat/byte') if fee_rate is not None else 'unknown'
         if dyn:
             if mempool:
@@ -342,14 +366,10 @@ class SimpleConfig(PrintError):
             tooltip = rate_str
         else:
             text = rate_str
-            if mempool:
+            if mempool and self.has_fee_mempool():
-                if self.has_fee_mempool():
                 depth = self.fee_to_depth(fee_rate)
                 tooltip = self.depth_tooltip(depth)
-                else:
+            elif not mempool and self.has_fee_etas():
-                    tooltip = ''
-            else:
-                if self.has_fee_etas():
                 eta = self.fee_to_eta(fee_rate)
                 tooltip = self.eta_tooltip(eta)
             else:
@@ -361,7 +381,7 @@ class SimpleConfig(PrintError):
         return min(maxp, self.get('depth_level', 2))
 
     def get_fee_level(self):
-        maxp = len(FEE_ETA_TARGETS) - 1
+        maxp = len(FEE_ETA_TARGETS)  # not (-1) to have "next block"
         return min(maxp, self.get('fee_level', 2))
 
     def get_fee_slider(self, dyn, mempool):
@@ -372,7 +392,7 @@ class SimpleConfig(PrintError):
                 fee_rate = self.depth_to_fee(pos)
             else:
                 pos = self.get_fee_level()
-                maxp = len(FEE_ETA_TARGETS) - 1
+                maxp = len(FEE_ETA_TARGETS)  # not (-1) to have "next block"
                 fee_rate = self.eta_to_fee(pos)
         else:
             fee_rate = self.fee_per_kb()
@@ -380,12 +400,11 @@ class SimpleConfig(PrintError):
             maxp = 9
         return maxp, pos, fee_rate
 
-
     def static_fee(self, i):
-        return self.fee_rates[i]
+        return FEERATE_STATIC_VALUES[i]
 
     def static_fee_index(self, value):
-        dist = list(map(lambda x: abs(x - value), self.fee_rates))
+        dist = list(map(lambda x: abs(x - value), FEERATE_STATIC_VALUES))
         return min(range(len(dist)), key=dist.__getitem__)
 
     def has_fee_etas(self):
@@ -394,6 +413,12 @@ class SimpleConfig(PrintError):
     def has_fee_mempool(self):
         return bool(self.mempool_fees)
 
+    def has_dynamic_fees_ready(self):
+        if self.use_mempool_fees():
+            return self.has_fee_mempool()
+        else:
+            return self.has_fee_etas()
+
     def is_dynfee(self):
         return bool(self.get('dynamic_fees', True))
 
@@ -410,7 +435,7 @@ class SimpleConfig(PrintError):
             else:
                 fee_rate = self.eta_to_fee(self.get_fee_level())
         else:
-            fee_rate = self.get('fee_per_kb', self.max_fee_rate()/2)
+            fee_rate = self.get('fee_per_kb', FEERATE_FALLBACK_STATIC_FEE)
         return fee_rate
 
     def fee_per_byte(self):

lib/util.py

@@ -41,7 +41,6 @@ def inv_dict(d):
 
 
 base_units = {'BTC':8, 'mBTC':5, 'uBTC':2}
-fee_levels = [_('Within 25 blocks'), _('Within 10 blocks'), _('Within 5 blocks'), _('Within 2 blocks'), _('In the next block')]
 
 def normalize_version(v):
     return [int(x) for x in re.sub(r'(\.0+)*$','', v).split(".")]

lib/wallet.py

@@ -78,9 +78,9 @@ TX_HEIGHT_UNCONFIRMED = 0
 
 
 def relayfee(network):
-    RELAY_FEE = 1000
+    from .simple_config import FEERATE_DEFAULT_RELAY
     MAX_RELAY_FEE = 50000
-    f = network.relay_fee if network and network.relay_fee else RELAY_FEE
+    f = network.relay_fee if network and network.relay_fee else FEERATE_DEFAULT_RELAY
     return min(f, MAX_RELAY_FEE)
 
 def dust_threshold(network):