add py test script for treasury and fees

scripts/treasury-test.py

@@ -0,0 +1,60 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Created on Thu Sep 16 20:41:13 2021
+
+@author: brenzi
+"""
+
+from substrateinterface import SubstrateInterface, Keypair
+from substrateinterface.utils.ss58 import ss58_encode
+
+def get_balance(who):
+    return substrate.query('System', 'Account', params=[who]).value['data']['free']
+
+substrate = SubstrateInterface(
+        url="ws://127.0.0.1:9944",
+        type_registry_preset='kusama'
+    )
+alice = Keypair.create_from_uri('//Alice')
+dave = Keypair.create_from_uri('//Dave')
+treasury = ss58_encode('0x' + b'modlpy/trsry'.hex() + '0000000000000000000000000000000000000000')
+
+alicebefore = get_balance(alice.ss58_address)
+treasurybefore = get_balance(treasury)
+totalissuancebefore = substrate.query('Balances', 'TotalIssuance')
+print('total issuance', totalissuancebefore)
+
+amount = 10 * 10**9 #milli
+
+call = substrate.compose_call(
+    call_module='Balances',
+    call_function='transfer',
+    call_params={
+        'dest': dave.ss58_address,
+        'value': amount
+    }
+)
+
+payment_info = substrate.get_payment_info(call=call, keypair=alice)
+print("Payment info: ", payment_info)
+
+extrinsic = substrate.create_signed_extrinsic(
+    call=call,
+    keypair=alice,
+    era={'period': 64}
+)
+receipt = substrate.submit_extrinsic(extrinsic, wait_for_inclusion=True)
+print('extrinsic sent')
+
+totalissuanceafter = substrate.query('Balances', 'TotalIssuance')
+print('difference in total issuance: ', totalissuancebefore.value - totalissuanceafter.value)
+
+aliceafter = get_balance(alice.ss58_address)
+
+paidfee = alicebefore - aliceafter - amount
+print('fee paid : ', paidfee)
+
+treasuryafter = get_balance(treasury)
+
+print('treasury balance is ', treasuryafter, ' and has increased by', treasuryafter-treasurybefore)