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import base64
def offset_to_page_id(offset: int, has_next: bool) -> str | None:
if not has_next:
return None
next_page_id = base64.b64encode(str(offset).encode()).decode()
return next_page_id
def page_id_to_offset(page_id: str | None) -> int:
if not page_id:
return 0
offset = int(base64.b64decode(page_id).decode())
return offset
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