Add keywords helpers

Signed-off-by: Vladimir Avdeev <v.avdeev@yadro.com>

src/neofs_testlib/utils/wallet.py

@@ -0,0 +1,37 @@
+import json
+import logging
+
+from neo3 import wallet as neo3_wallet
+
+logger = logging.getLogger("neofs.testlib.utils")
+
+
+def init_wallet(wallet_path: str, wallet_password: str):
+    """
+    Create new wallet and new account.
+    Args:
+        wallet_path:  The path to the wallet to save wallet.
+        wallet_password: The password for new wallet.
+    """
+    wallet = neo3_wallet.Wallet()
+    account = neo3_wallet.Account.create_new(wallet_password)
+    wallet.account_add(account)
+    with open(wallet_path, "w") as out:
+        json.dump(wallet.to_json(), out)
+    logger.info(f"Init new wallet: {wallet_path}, address: {account.address}")
+
+
+def get_last_address_from_wallet(wallet_path: str, wallet_password: str):
+    """
+    Extracting the last address from the given wallet.
+    Args:
+        wallet_path:  The path to the wallet to extract address from.
+        wallet_password: The password for the given wallet.
+    Returns:
+        The address for the wallet.
+    """
+    with open(wallet_path) as wallet_file:
+        wallet = neo3_wallet.Wallet.from_json(json.load(wallet_file), password=wallet_password)
+    address = wallet.accounts[-1].address
+    logger.info(f"got address: {address}")
+    return address