# 🤝🏻 合作-API：🕹集成GMGN ETH/Base/BSC交易API

✅ 若通过审核，GMGN会将API Key发送至你填写的邮箱\
❌ 若未通过审核，GMGN将不会发送任何信息通知

### 鉴权

* GMGN为我们的专业用户提供 SOL/BSC/Base/ETH 交易API，能否通过的唯一标准是你在GMGN是否有足够的交易量。审核将在提交后24小时内完成
* 访问GMGN Trade Api需申请使用权限，请填写以下google表单申请: <https://forms.gle/CWABDLRe8twvygvy5>
* 审核通过后GMGN会分配一个Api Key至你的邮箱，访问接口需将Api Key带入header中 header name: x-route-key
* 每个Api Key限频5s调用一次

#### **ETH/Base链Swap交易步骤：**

1. **同时获取交易路由，获取推荐滑点，获取推荐gas price**

* 获取交易路由: [获取ETH/Base/BSC交易可用的路由](/cn/he-zuo-api-ji-cheng-gmgn-ethbasebsc-jiao-yi-api/huo-qu-ethbasebsc-jiao-yi-ke-yong-de-lu-you.md)
* 获取推荐滑点: [获取ETH/Base/BSC代币推荐滑点值](/cn/he-zuo-api-ji-cheng-gmgn-ethbasebsc-jiao-yi-api/huo-qu-ethbasebsc-dai-bi-tui-jian-hua-dian-zhi.md)
* 获取推荐gas price: [获取ETH/Base/BSC链推荐gas price](/cn/he-zuo-api-ji-cheng-gmgn-ethbasebsc-jiao-yi-api/huo-qu-ethbasebsc-lian-tui-jian-gas-price.md)

2. **选择路由后，调用模拟交易**

{% content-ref url="/pages/WUTwv1GLaJO57D38rg0k" %}
[Swap交易的模拟交易(ETH/Base/BSC)](/cn/he-zuo-api-ji-cheng-gmgn-ethbasebsc-jiao-yi-api/swap-jiao-yi-de-mo-ni-jiao-yi-ethbasebsc.md)
{% endcontent-ref %}

3. **模拟交易通过后，获取返回的data字段，使用普通rpc或者防夹rpc提交正式交易**

提交交易签名，可以使用ethers js库

签名交易教程 <https://docs.ethers.org/v6/api/providers/#Signer-signTransaction>

ethers js库 <https://github.com/ethers-io/ethers.js>


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