I have users who will initiate booking for one product with x price. This contract will create a wallet contract between that user and the product so that he can return/cancel the booking at any time and get the refund or succeed.


User talks via contract EthBooking

contract EthBooking {
    function addBooking(uint listingId) public payable returns(uint bookingId) {
    bookingId =  BookingLibrary.book(ethDB, listingId, msg.sender, msg.value);

    //Send money to the contract
    return bookingId;

Booking Library code:

library BookingLibrary {

function book(address db, uint listingId, address sender, uint value) 
        internal returns (uint bookingId) 
    var cost = ListingLibrary.getCost(db,listingId);
        //Create Contract wallet
        EthWallet wallet = new EthWallet();
        //Send money to the contract
    return bookingId;

EthWallet Code:

contract EthWallet is Mortal {

function ethWallet() {

function receiveFunds() payable {


function sendFunds(address receiver, uint amount) {



The ethers sent is held in contract EthBooking and is not transferred to EthWallet as expected with code wallet.receiveFunds.value(cost); .

Please guide me about if the chosen approach is right and also why the ethers are not transferred to the destination. PS: The code is shortened with removal of irrelevant parts to avoid confusion

  • Why is sendFunds() payable? – MSwezey Feb 4 '18 at 2:42
  • Aw! May be a spill over from my trial and errors @MSwezey . Thanks for noticing. Removing it right away. – Karthik Feb 4 '18 at 3:27

I mocked this up in Truffle.

Using your way:


Resulted in failure:

[ Instantiate Contract ]
    √ should instantiate the pact correctly
Wallet address: 0xa830ec357b950fde26d220b0f256b6d47529bdbd
Amount sent in wei: 3000000000000000000
Balance in eth wallet: 0
    (failed) 1) should transfer funds using library

Using this method:


Resulted in success:

[ Instantiate Contract ]
    √ should instantiate the pact correctly
Wallet address: 0xcc9fa65469197707e06eb16c2b01b9a62ddea75f
Amount sent in wei: 3000000000000000000
Balance in eth wallet: 3000000000000000000
    √ should transfer funds using library (410ms)

Others that worked:

wallet.send(cost);  // made a fallback function in EthWallet for this
wallet.transfer(cost);    // same as above, fallback function
address(wallet).call.value(cost)();  // fallback again

See Sending and Receiving Ether @ http://solidity.readthedocs.io/en/develop/security-considerations.html?highlight=send%20transfer

Other Notes: Your constructor should be exactly the same. Not ethWallet but EthWallet.

  • why do i have Error: Error: the tx doesn't have the correct nonce. account has nonce of.... on truffle test – Karthik Feb 4 '18 at 10:38

Missing function call at the end:

  • I have tried tis and unfortunately the results are the same – Karthik Feb 3 '18 at 17:59
  • There must be something else. Did you check if cost > 0? – lunr Feb 3 '18 at 18:02
  • yes I debug and I see the cost as 22000000000000000000 which is right. – Karthik Feb 3 '18 at 18:05
  • There has be to something else with the code, I made some tests and value transfer happens successfully. I noticed there is a function named ethWallet in your code. Is it meant to be a constructor? If so, you should name it EthWallet otherwise it won't work. – lunr Feb 3 '18 at 21:59

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