ln_init: space out channel open tx fee rates more

Author: pinheadmz

resources/scenarios/ln_init.py

@@ -240,11 +240,11 @@ def open_channel(self, ch, fee_rate):
 
             channels = sorted(ch_by_block[target_block], key=lambda ch: ch["id"]["index"])
             index = 0
-            fee_rate = 5006  # s/vB, decreases by 5 per tx for up to 1000 txs per block
+            fee_rate = 5006  # s/vB, decreases by 20 per tx for up to 250 txs per block
             ch_threads = []
             for ch in channels:
                 index += 1  # noqa
-                fee_rate -= 5
+                fee_rate -= 20
                 assert index == ch["id"]["index"], "Channel ID indexes are not consecutive"
                 assert fee_rate >= 1, "Too many TXs in block, out of fee range"
                 t = threading.Thread(target=open_channel, args=(self, ch, fee_rate))