request(
  "GET",
  "/v1/custody/is_valid_address/",
  {
    "coin": "ETH",
    "address": "0x544094588811118b7701cf4a9dea056e775b4b4e",
  },
  api_key, api_secret, host
)

coboFetch('GET', '/v1/custody/is_valid_address/',
        {
            "coin": "ETH",
            "address": "0x544094588811118b7701cf4a9dea056e775b4b4e",
        },
        api_key, api_secret, host
    ).then(res => {
        res.json().then((data)=>{
            console.log(JSON.stringify(data, null, 4));
        })
    }).catch(err => {
        console.log(err)
    });

Request("GET", "/v1/custody/is_valid_address/", map[string]string{
    "coin": "ETH",
    "address": "0x544094588811118b7701cf4a9dea056e775b4b4e",
})

{
  "success": true,
  "result": true
}
----
{
  "success": true,
  "result": false
}