getBalanceByHolder(contract, holder, partition)

Feature	get balance information of given partition for certain holder
Parameters	string contract address, string holder address, string partition
data of SuccessResponse	object partition balance information for certain holder

example

const contractAddress = "0x41EFb6902ADcb1214a7123b01af66b1D13b89864fca";
const partition = "EFGH";
const holder = "0x07469989b2562afF5E5C3B116CD3AA5Ef814e5a1fca";

// Note: an asynchrous request
const getBalanceByHolder = async () => {
    const info = await mitum.sto.getBalanceByHolder(contractAddress, holder, partition);
    console.log(info.data);
};
getBalanceByHolder();

//output
{
    "_hint": "mitum-currency-hal-v0.0.1",
    "_embedded": {
        "amount": "30000"
    },
    "_links": {
        "self": {
            "href": "/sto/0x41EFb6902ADcb1214a7123b01af66b1D13b89864fca/holder/0x07469989b2562afF5E5C3B116CD3AA5Ef814e5a1fca/partition/EFGH/balance"
        }
    }
}