encode contract call data

encode.js

// VIP-180 balanceOf method
const balanceOf = new abi.Function({
    "constant": true,
    "inputs": [
        {
            "name": "_owner",
            "type": "address"
        }
    ],
    "name": "balanceOf",
    "outputs": [
        {
            "name": "balance",
            "type": "uint256"
        }
    ],
    "payable": false,
    "stateMutability": "view",
    "type": "function"
})

// encode into clause data
const data = balanceOf.encode('some address')