curl --request POST \
  --url https://openplatform.gateapi.io/merchant/open/v1/pay/fixedaddress/evm/save \
  --header 'Content-Type: application/json' \
  --header 'X-GatePay-Certificate-ClientId: <x-gatepay-certificate-clientid>' \
  --header 'X-GatePay-Nonce: <x-gatepay-nonce>' \
  --header 'X-GatePay-Signature: <x-gatepay-signature>' \
  --header 'X-GatePay-Timestamp: <x-gatepay-timestamp>' \
  --data '
{
  "channelId": "smart_shop",
  "callbackUrl": "https://www.abc.com/callback",
  "chianCurrencyInfos": [
    {
      "chain": "ETH",
      "currencies": [
        "DAI",
        "USDT"
      ]
    }
  ]
}
'

{
  "status": "SUCCESS",
  "code": "000000",
  "errorMessage": "",
  "data": {
    "channelId": "susie",
    "address": "0xE74ac03A2d34A9cEce0A6547b1758C7A8fA10230",
    "callbackUrl": "https://www.abc123.com/callback",
    "chainInfos": [
      {
        "chainShowEn": "BSC/BEP20",
        "currencies": [
          "USDT"
        ]
      }
    ]
  }
}