separate fee policy from config

- Wallet.make_unsigned_transaction takes a FeePolicy parameter
 - fee sliders act on a FeePolicy instead of config
 - different fee policies may be used for different purposes
 - do not detect dust outputs in lnsweep, delegate that to lnwatcher

tests/test_sswaps.py

@@ -2,6 +2,7 @@ from electrum import SimpleConfig
 from electrum.util import bfh
 from electrum.transaction import PartialTxInput, TxOutpoint
 from electrum.submarine_swaps import SwapData, create_claim_tx
+from electrum.fee_policy import FeePolicy
 
 from . import ElectrumTestCase
 
@@ -13,8 +14,7 @@ class TestSwapTxs(ElectrumTestCase):
         super().setUp()
         self.maxDiff = None
         self.config = SimpleConfig({'electrum_path': self.electrum_path})
-        self.config.FEE_EST_DYNAMIC = False
-        self.config.FEE_EST_STATIC_FEERATE = 1000
+        self.fee_policy = FeePolicy('feerate:1000')
 
     def test_claim_tx_for_successful_reverse_swap(self):
         swap_data = SwapData(
@@ -39,7 +39,8 @@ class TestSwapTxs(ElectrumTestCase):
         tx = create_claim_tx(
             txin=txin,
             swap=swap_data,
-            config=self.config,
+            fee_policy=self.fee_policy,
+            network=None,
         )
         self.assertEqual(
             "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",
@@ -69,7 +70,8 @@ class TestSwapTxs(ElectrumTestCase):
         tx = create_claim_tx(
             txin=txin,
             swap=swap_data,
-            config=self.config,
+            fee_policy=self.fee_policy,
+            network=None,
         )
         self.assertEqual(
             "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",