# Function: exchangeItems

▸ exchangeItems(params: ExchangeItemsParams): Promise‹ExchangeItemsRes›

根据指定的兑换方案和物品，进行兑换

example

import { backpackSystem, synthesisSystem } from '@timi/mogs-sdk';

const exchangeOptions = await synthesisSystem.exchangeOptions;
const someExchangeOptionId = exchangeOptions.length && exchangeOptions[0].id;

const backpacks = await backpackSystem.backpacks;
const someBackpackItemId = backpacks.length && backpacks[0]?.items.get(0)?.itemUid;
const someOtherBackpackItemId = backpacks.length && backpacks[0]?.items.get(1)?.itemUid;

await synthesisSystem.exchangeItems({
  exchangeOptionId: someExchangeOptionId,
  itemsToExchange: [
    { backpackItemId: someBackpackItemId as Long, count: 2 },
    { backpackItemId: someOtherBackpackItemId as Long, count: 3 },
  ],
});

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throws {@link MogsError}

# 参数:

属性	类型
`params`	ExchangeItemsParams

ExchangeItemsParams

属性	类型	描述
`exchangeOptionId`	number	要使用的物品兑换方案 ID
`itemsToExchange`	Readonly‹object›[]	要被兑换的物品列表
`complete?`	Method	操作完成时(成功或失败)，均会调用该回调函数
`fail?`	Method	操作失败时，调用该回调函数
`success?`	Method	操作成功时，调用该回调函数

# 返回值:

Promise‹ExchangeItemsRes›

← exchangeOptions getPotentialExchangeOptionsByItems →