> ## Documentation Index
> Fetch the complete documentation index at: https://custodydocs-zh.chainup.com/llms.txt
> Use this file to discover all available pages before exploring further.

# 创建Web3交易

> 通过API创建一笔Web3交易

目前ChainUp Custody支持的Web3交易网络如下：

* Ethereum

* BNB Smart Chain

* HECO

* Avalanche (C-Chain)

* Polygon

* Filecoin

* TRON

* Wizarre Scroll

#### 请求参数数据结构

**sub\_wallet\_id** `integer` *required*

钱包id

**request\_id** `string` *required*

转账唯一标识.不可重复提交,限 32 字符,仅支持字母、数字、下划线（`_`）和短横线（`-`）.

**main\_chain\_symbol** `string` *required*

网络原生代币币名，币种唯一标识，例：`ETH`

**from** `string`

交易发起地址，钱包存在多地址时, 可指定交易地址, 不指定时默认使用钱包“常用地址“

**interactive\_contract** `string` *required*

交互合约

**amount** `string` *required*

交易金额，-1:表示无穷大, 该金额表示网络原生代币使用金额, 如金额为1ETH, 传值为:1

**gas\_price** `string` *required*

gas 矿工费，单位：Gwei

**gas\_limit** `string` *required*

gas limit 矿工费

**input\_data** `string` *required*

合约交易的方法参数组成的16进制数据

**trans\_type** `string` *required*

0:授权交易，1：其他交易。为0时，amount设置金额无效

**dapp\_name** `string`

dapp名称

**dapp\_url** `string`

dapp 访问url

**dapp\_img** `string`

dapp 图片

**sign** `string`

使用RSA私钥签名, 参与签名的参数: "request\_id", "sub\_wallet\_id", "main\_chain\_symbol", "interactive\_contract", "amount", "input\_data"。签名规则详见[Co-Signer交易签名验证](/api-references/mpc-apis/co-signer/sign-verify.md)

#### 响应参数数据结构

**object**

**trans\_id** `integer`

Web3交易ID

```curl cURL theme={null}
curl -X POST \
--url 'https://openapi.chainup.com/api/mpc/web3/trans/create?app_id=16a9f17fc2ad61ca4339fdd6a8a37f21&data=SWYYr-LBVAmaS0eq8n-CUT_nHkM3OBxyWOsImMTe41UaqAoYI2ZghmaphXHov-7hsRsVmOhyPqC-JFuRGvonJKFd2Jirxv6Vn_8V40r_MMYTkhqcviQbZWYW5xX8Ai8CIpqas9fIWVDIYA_NKBl0UCJpwGxscxLNpjq5Z8-BTyIYDsVBquM9zEQGBCfcA7szD9n2fN_loSkoexlwqV8wg9HIZO5yQ6utZ_Kt0lNDQQb8zn8BwfAvsEsbJlOINUAqhxh1vV_AJ4bXn2uYx8TaYcBht-n_ZcBdxIDt975dbOFUiH-oCzIuDi1oLDtb4EylfCvhU5E4ozel_lQ-6cyIG0Dqiiyx0RFFOCJzPSXIoV031pvoa8pTCpkWklh8mRw1rylBgeZtqSxpnJO2_u2RIlXq6Hs8Yly9CmhIXaSrUgPir0h6xVxlf4VC6PFVCkiiTlp0kZ_H_UbKm0nUis3v3U2sflWJ2C449waSrikhuxVrFAQ6PQmrFVCAE6MYXNrFXJQuam2HAIQNSGbFQjspw8b_bXyfyZMGZ3K2oBC4I_v3eETTdPe0pfSNJb-5g37K0tOAr_UFbWK8pkC8yl56fSjn8tcR3yCRWwoi8jxTcUBiswTtvXZtzgG4dyzkaHXjsZjSGiywXSqP76VZWlyOmAx6IDSViLcPLPISdU3ruCI'
```

```json theme={null}
{
     "trans_id": 198012
}
```


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