web3.eth.getBalance('0x123').then(console.log) // 0

address public recipient;  // The account receiving the payments.

function receive(uint256 amount) public {
        require(msg.sender == recipient);

        recipient.transfer(amount);

    }

constructor(address _recipient)
        public
        payable
    {
        recipient = _recipient;
    }

var contractInstance = new web3.eth.Contract(abi, '0x456' /*0x456 is contract address*/);

contractInstance.methods.close(10 /*0x123 wants to receive 10 wei*/).send({ from: '0x123' }, function(error, result) {

        console.log(error);

        console.log(result)

    });