获取签名所需信息#

当你完成了上述的操作后，这时候可以尝试发起一笔交易。调用 POST /api/v5/waas/wallet/pre-transaction/sign-info 接口，查询签名所需要的一些数据，包含 EVM 链相关的 gas price、gas limit、nonce 等。

//定义你的参数
// EVM
const postSignInfoBody = {
    chainIndex: '1',
    fromAddr: '0xdf54b6c6195ea4d948d03bfd818d365cf175cfc2',
    toAddr: '0x1e80c39051f078ee34763282cbb36ffd88b40c65',
    txAmount: '123000000000000',
    extJson: {
        inputData: '041bbc6fa102394773c6d8f6d634320773af4'
    }
  };
  
// UTXO
/*
const getSignInfoBody = {
    fromAddr: 'bc1psnr548clz3f4fz6jmpnw5eqzj2v2musk082wp8fvq5ac3p5ete6qg05u8u',
    toAddr: 'bc1psnr548clz3f4fz6jmpnw5eqzj2v2musk082wp8fvq5ac3p5ete6qg05u8u',
    txAmount: '123000000000000',
    chainId: '0',
    extJson: {}
  };
*/

//定义辅助函数
const signInfoData = async () => {
    const apiRequestUrl = getRequestUrl(
      apiBaseUrl,
      '/api/v5/waas/wallet/pre-transaction/sign-info'
    );
    return fetch(apiRequestUrl, {
      method: 'post',
      headers: headersParams,
      body: JSON.stringify(postSignInfoBody),
    })
      .then((res) => res.json())
      .then((res) => {
        return res;
      });
  };

const { data: signInfoData } = await signInfoData();

当查询到相关信息后，你将收到如下的响应：

// EVM
{
        "code": 0,
        "msg": "success",
        "data": [
            // EVM
            {
                "gasLimit": "21000",
                "nonce": "0",
                "gasPrice": {
                        "normal": "12200500000",
                        "min": "9130000000",
                        "max": "16801000000",
                        "supportEip1559": true,
                        "erc1599Protocol": {
                                "suggestBaseFee": "8630000000",
                                "proposePriorityFee": "550000000",
                                "safePriorityFee": "500000000",
                                "fastPriorityFee": "2130000000",
                                "baseFee": "8630000000"
                        }
                }
            },
        ]
}