# from typing import Optional

# from cashu.core.base import KeyBase, Keyset
# from cashu.core.db import Connection, Database


# async def store_keyset(
#     keyset: Keyset,
#     mint_url: str = None,
#     db: Database = None,
#     conn: Optional[Connection] = None,
# ):

#     await (conn or db).execute(
#         """
#         INSERT INTO keysets
#           (id, mint_url, valid_from, valid_to, first_seen, active)
#         VALUES (?, ?, ?, ?, ?, ?)
#         """,
#         (
#             keyset.id,
#             mint_url or keyset.mint_url,
#             keyset.valid_from,
#             keyset.valid_to,
#             keyset.first_seen,
#             True,
#         ),
#     )


# async def get_keyset(
#     id: str = None,
#     mint_url: str = None,
#     db: Database = None,
#     conn: Optional[Connection] = None,
# ):
#     clauses = []
#     values = []
#     clauses.append("active = ?")
#     values.append(True)
#     if id:
#         clauses.append("id = ?")
#         values.append(id)
#     if mint_url:
#         clauses.append("mint_url = ?")
#         values.append(mint_url)
#     where = ""
#     if clauses:
#         where = f"WHERE {' AND '.join(clauses)}"

#     row = await (conn or db).fetchone(
#         f"""
#         SELECT * from keysets
#         {where}
#         """,
#         tuple(values),
#     )
#     return Keyset.from_row(row) if row is not None else None


# async def store_mint_pubkey(
#     key: KeyBase,
#     db: Database,
#     conn: Optional[Connection] = None,
# ):

#     await (conn or db).execute(
#         """
#         INSERT INTO mint_pubkeys
#           (id, amount, pubkey)
#         VALUES (?, ?, ?)
#         """,
#         (key.id, key.amount, key.pubkey),
#     )