Add keywords helpers

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

src/neofs_testlib/utils/converters.py

@@ -0,0 +1,69 @@
+import base64
+import binascii
+import json
+
+import base58
+from neo3 import wallet as neo3_wallet
+
+
+def str_to_ascii_hex(input: str) -> str:
+    b = binascii.hexlify(input.encode())
+    return str(b)[2:-1]
+
+
+def ascii_hex_to_str(input: str) -> bytes:
+    return bytes.fromhex(input)
+
+
+# Two functions below do parsing of Base64-encoded byte arrays which
+# tests receive from Neo node RPC calls.
+
+
+def process_b64_bytearray_reverse(data: str) -> bytes:
+    """
+    This function decodes input data from base64, reverses the byte
+    array and returns its string representation.
+    """
+    arr = bytearray(base64.standard_b64decode(data))
+    arr.reverse()
+    return binascii.b2a_hex(arr)
+
+
+def process_b64_bytearray(data: str) -> bytes:
+    """
+    This function decodes input data from base64 and returns the
+    bytearray string representation.
+    """
+    arr = bytearray(base64.standard_b64decode(data))
+    return binascii.b2a_hex(arr)
+
+
+def contract_hash_to_address(chash: str) -> str:
+    """
+    This function accepts contract hash in BE, then translates in to LE,
+    prepends NEO wallet prefix and encodes to base58. It is equal to
+    `UInt160ToString` method in NEO implementations.
+    """
+    be = bytearray(bytes.fromhex(chash))
+    be.reverse()
+    return base58.b58encode_check(b"\x35" + bytes(be)).decode()
+
+
+def get_contract_hash_from_manifest(manifest_path: str) -> str:
+    with open(manifest_path) as m:
+        data = json.load(m)
+        # cut off '0x' and return the hash
+        return data["abi"]["hash"][2:]
+
+
+def get_wif_from_private_key(priv_key: bytes) -> str:
+    wif_version = b"\x80"
+    compressed_flag = b"\x01"
+    wif = base58.b58encode_check(wif_version + priv_key + compressed_flag)
+    return wif.decode("utf-8")
+
+
+def load_wallet(path: str, passwd: str = "") -> neo3_wallet.Wallet:
+    with open(path, "r") as wallet_file:
+        wlt_data = wallet_file.read()
+    return neo3_wallet.Wallet.from_json(json.loads(wlt_data), password=passwd)