prune script (#2786) (#2793)

(cherry picked from commit 0378e542

)

Co-authored-by: Adam Tucker <adam@osmosis.team>

tests/localosmosis/mainnet_state/stateprune.py

+import json
+
+test_gen = open("testnet_genesis.json", "r+")
+read_test_gen = json.loads(test_gen.read())
+
+#remove everything from channel_genesis except next_channel_sequence
+for elem in list(read_test_gen['app_state']['ibc']['channel_genesis']):
+    if elem == 'next_channel_sequence':
+        continue
+    else:
+        del read_test_gen['app_state']['ibc']['channel_genesis'][elem]
+
+#remove everything from client_genesis except create_localhost, params, and next_client_sequence
+for elem in list(read_test_gen['app_state']['ibc']['client_genesis']):
+    if elem == 'create_localhost' or elem == 'params' or elem == 'next_client_sequence':
+        continue
+    else:
+        del read_test_gen['app_state']['ibc']['client_genesis'][elem]
+
+#remove everything from distribution except params, fee_pool, outstanding_rewards, and previous_proposer
+for elem in list(read_test_gen['app_state']['distribution']):
+    if elem == 'params' or elem == 'fee_pool' or elem == 'outstanding_rewards' or elem == 'previous_proposer':
+        continue
+    else:
+        del read_test_gen['app_state']['distribution'][elem]
+
+
+print("Please wait while file writes over itself, this may take 60 seconds or more")
+#go back to begining of file, write over with new values
+test_gen.seek(0)
+json.dump(read_test_gen, test_gen)
+
+#delete remainder in case new data is shorter than old
+test_gen.truncate()
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