- address_base64: bytom address image base64.
```python
+>>> from pybtm import receiver
>>> xpub_hexstr = '8fde12d7c9d6b6cbfbf344edd42f2ed86ae6270b36bab714af5fd5bb3b54adcec4265f1de85ece50f17534e42016ee9404a11fec94ddfadd4a064d27ef3f3f4c'
>>> account_index_int = 1
>>> address_index_int = 1