Well I have contract which creates another contract:

    function myMethod(address contractbAddress) payable public{
        address contractcAddress = (new contractC).value(msg.value)(msg.sender,address(this),contractbAddress);
    function setContract(address sender,address contractcAddress){
    function contractC(address sender,address contractaAddress,address contractbAddress){

I have contractB's address and contractA's address when I deployed them using truffle migrate.

Now when I will call function myMethod using web3, how will it get to know what is contractC because they no longer have the source code of it?

1 Answer 1


I'd assume your function myMethod is creating contract C and not B, ie (new contractC) instead.

Since you are generating an event with the address you want


You can listen for that event

contractA.events.confirmEvent.watch((err, ev) => {
    console.log(ev); // contract c address is a parameter of the event

Another option is to request the receipt of the transaction that calls myMethod the event should be between the logs of the receipt.

  • Yea myMethod is creating creating contract, I will edit that part. But the problem is call to myMethod is always unsuccessful because the deployed contractA doesn't know what contractC is.
    – shubh0906
    Commented May 8, 2018 at 11:52
  • For contractA to be able to create contractC you need to import the file where contractC is defined. If that is a problem you can use the factory pattern.
    – Ismael
    Commented May 9, 2018 at 1:43

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