This takes an account address and returns whether been whitelisted.

After the router is defined, define the inputs and responses for this queryTokenData:

Notes on the above code:

This query request ONE path-parameter which refer to token-symbol. The output type should be something that is both JSON marshalable and stringable (implements the Golang fmt.Stringer interface). The returned bytes should be the JSON encoding of the output result.

For the output of Token, the normal Token struct is already JSON marshalable, but we need to add a .String() method on it.

Parameters

Name	Type	Default	Required	Description
path	string	false	false	Path to the data (eg. "/a/b/c")
data	[]byte	false	true	Data
height	int64	0	false	Height (0 means latest)
prove	bool	false	false	Include proofs of the transactions inclusion in the block, if true

Example

In this example, we will explain how to query token data with abci_query.

Run the command with the JSON request body:

curl 'http://localhost:26657/'

{
    "method": "abci_query",
    "params": [
        "/custom/kyc/is_whitelisted/mxw1md4u2zxz2ne5vsf9t4uun7q2k0nc3ly5g22dne",
        "",
        "0",
        false
        ],
    "id": 0,
    "jsonrpc": "2.0"
}

The above command returns JSON structured like this:

{
    "jsonrpc": "2.0",
    "id": 0,
    "result": {
        "response": {
            "code": 0,
            "log": "",
            "info": "",
            "index": "0",
            "key": null,
            "value": "VHJ1ZQ==",
            "proof": null,
            "height": "36",
            "codespace": ""
        }
    }
}