code: def upgrade():
      
      op.create_table(
          'transaction',
          sa.Column('issued_at', sa.DateTime(), nullable=True),
          sa.Column('id', sa.BigInteger(), nullable=False),
          sa.Column('remote_addr', sa.String(length=50), nullable=True),
      )
      op.create_primary_key('pk_transaction', 'transaction', ['id'])
      if op._proxy.migration_context.dialect.supports_sequences:
          op.execute(CreateSequence(Sequence('transaction_id_seq')))
docs: Update database.