/**
 * @param { import("knex").Knex } knex
 * @returns { Promise<void> }
 */
exports.up = function(knex) {
  return knex.schema.alterTable('invoices', table => {
    table.boolean('is_prepayment').notNullable().defaultTo(false);
  });
};

/**
 * @param { import("knex").Knex } knex
 * @returns { Promise<void> }
 */
exports.down = function(knex) {
  return knex.schema.alterTable('invoices', table => {
    table.dropColumn('is_prepayment');
  });
};