feat(testing): add a script for Tycho integration testing

testing/evm.py

@@ -0,0 +1,24 @@
+from web3 import Web3
+
+
+def get_token_balance(rpc_url, token_address, wallet_address, block_number):
+    web3 = Web3(Web3.HTTPProvider(rpc_url))
+
+    if not web3.isConnected():
+        raise ConnectionError("Failed to connect to the Ethereum node")
+
+    erc20_abi = [
+        {
+            "constant": True,
+            "inputs": [{"name": "_owner", "type": "address"}],
+            "name": "balanceOf",
+            "outputs": [{"name": "balance", "type": "uint256"}],
+            "type": "function",
+        }
+    ]
+
+    contract = web3.eth.contract(address=token_address, abi=erc20_abi)
+    balance = contract.functions.balanceOf(wallet_address).call(
+        block_identifier=block_number
+    )
+    return balance