How can I tell which function is the constructor function?

In the OpenZeppelin implementation of the MultisigWallet, OpenZeppelin claims this is the constructor function:

   * Constructor, sets the owners addresses, number of approvals 
     required, and daily spending limit
   * @param _owners A list of owners.
   * @param _required The amount required for a transaction to be 

function MultisigWallet(address[] _owners, uint256 _required, uint256 _daylimit)
    Shareable(_owners, _required)
    DayLimit(_daylimit) { }

My problem is that I cannot tell the difference between this function and any other function.

How do I identify constructor functions?

1 Answer 1


In older contracts, constructors will be a function with the same name as the contract they're in. In newer contracts, the constructor will be labeled as constructor in place of function ContractName.

  • Is there any reason this constructor function does not have a {} after the parameters? Nov 29, 2018 at 15:36
  • The lines following the parameters, Shareable(_owners, _required) and DayLimit(_daylimit), are the super constructors. Those are calling the constructors of parents when you call the MultisigWallet constructor. The brackets after the DayLimit(_daylimit) are the ones where you would put code to execute in the constructor.
    – natewelch_
    Nov 29, 2018 at 15:38

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