config: (trivial) add some type hints and rm unused variable

electrum/interface.py

@@ -29,7 +29,7 @@ import sys
 import traceback
 import asyncio
 import socket
-from typing import Tuple, Union, List, TYPE_CHECKING, Optional, Set, NamedTuple, Any, Sequence
+from typing import Tuple, Union, List, TYPE_CHECKING, Optional, Set, NamedTuple, Any, Sequence, Dict
 from collections import defaultdict
 from ipaddress import IPv4Network, IPv6Network, ip_address, IPv6Address, IPv4Address
 import itertools
@@ -371,7 +371,7 @@ class Interface(Logger):
         self.tip_header = None
         self.tip = 0
 
-        self.fee_estimates_eta = {}
+        self.fee_estimates_eta = {}  # type: Dict[int, int]
 
         # Dump network messages (only for this interface).  Set at runtime from the console.
         self.debug = False
@@ -683,6 +683,7 @@ class Interface(Logger):
             for nblock_target, task in fee_tasks:
                 fee = task.result()
                 if fee < 0: continue
+                assert isinstance(fee, int)
                 self.fee_estimates_eta[nblock_target] = fee
             self.network.update_fee_estimates()
             await asyncio.sleep(60)

electrum/network.py

@@ -534,7 +534,7 @@ class Network(Logger, NetworkRetryManager[ServerAddr]):
                 return {}
             return self.interface.fee_estimates_eta
 
-    def update_fee_estimates(self, *, fee_est: Dict = None):
+    def update_fee_estimates(self, *, fee_est: Dict[int, int] = None):
         if fee_est is None:
             fee_est = self.get_fee_estimates()
         for nblock_target, fee in fee_est.items():

electrum/simple_config.py

@@ -66,8 +66,7 @@ class SimpleConfig(Logger):
         self.lock = threading.RLock()
 
         self.mempool_fees = None  # type: Optional[Sequence[Tuple[Union[float, int], int]]]
-        self.fee_estimates = {}
+        self.fee_estimates = {}  # type: Dict[int, int]
-        self.fee_estimates_last_updated = {}
         self.last_time_fee_estimates_requested = 0  # zero ensures immediate fees
 
         # The following two functions are there for dependency injection when
@@ -517,10 +516,10 @@ class SimpleConfig(Logger):
     def static_fee(self, i):
         return FEERATE_STATIC_VALUES[i]
 
-    def static_fee_index(self, value) -> int:
+    def static_fee_index(self, fee_per_kb: Optional[int]) -> int:
-        if value is None:
+        if fee_per_kb is None:
             raise TypeError('static fee cannot be None')
-        dist = list(map(lambda x: abs(x - value), FEERATE_STATIC_VALUES))
+        dist = list(map(lambda x: abs(x - fee_per_kb), FEERATE_STATIC_VALUES))
         return min(range(len(dist)), key=dist.__getitem__)
 
     def has_fee_etas(self):
@@ -611,9 +610,10 @@ class SimpleConfig(Logger):
         fee_per_byte = quantize_feerate(fee_per_byte)
         return round(fee_per_byte * size)
 
-    def update_fee_estimates(self, key, value):
+    def update_fee_estimates(self, nblock_target: int, fee_per_kb: int):
-        self.fee_estimates[key] = value
+        assert isinstance(nblock_target, int), f"expected int, got {nblock_target!r}"
-        self.fee_estimates_last_updated[key] = time.time()
+        assert isinstance(fee_per_kb, int), f"expected int, got {fee_per_kb!r}"
+        self.fee_estimates[nblock_target] = fee_per_kb
 
     def is_fee_estimates_update_required(self):
         """Checks time since last requested and updated fee estimates.