Deploying a Safe with Modules Enabled in One Transaction: A Guide

Ethereum is a decentralized, open-source blockchain platform that enables developers to build and deploy smart contracts, dApps (decentralized applications), and other autonomous systems. When it comes to deploying a safe, a self-contained container for sensitive data, you want to ensure that all necessary modules are enabled and deployed in a single transaction. In this article, we’ll explore the best methods to achieve this goal.

What is a Safe?

A safe is a type of smart contract that can be used to store and manage sensitive information, such as private keys, wallet addresses, or other confidential data. Safes are designed to provide an additional layer of security and control over access to these resources.

Best Method: deploying Safes with Modules Enabled in One Transaction

To deploy a safe with multiple modules enabled in one transaction, you can use the following steps:

  • Create a new Safe contract: First, create a new smart contract for your safe using Solidity (the programming language used to build Ethereum contracts). For example:

pragma solidity ^0.8.0;




Safe contract {


    address public owner;


    mapping(address => bool) public isOwner;




    constructor() public {


        owner = msg.sender;


        isOwner[msg.sender] = true;


    }




    function deposit() public payable {


        require(isOwner[msg.sender], "You are not the owner of this safe.");


        // Add your own logic to handle deposits here


    }




    function withdraw(address _receiver) public {


        require(isOwner[msg.sender], "You are not the owner of this safe.");


        require(_receiver != address(0), "Receiver is zero-address");


        payable(_receiver).transfer(amount);


    }


}

  • Add modules to the Safe contract: To enable multiple modules, you’ll need to add them as separate components to your Safe contract. One way to do this is by using the ExternalCall function from OpenZeppelin’s ERC-165 interface. For example:

pragma solidity ^0.8.0;




Safe contract {


    ExternalCall internal _depositModule;


    ExternalCall internal _withdrawModule;




    constructor() public {


        _depositModule = new ExternalCall("safeDeposit", "safe");


        _withdrawModule = new ExternalCall("safeWithdrawal", "safe");


    }




    function deposit() public payable {


        _repositoryModule.call();


    }




    function withdraw(address _receiver) public {


        _withdrawModule.call(_receiver);


    }


}

  • Create separate transactions

    : To deploy your Safe contract with multiple modules enabled, you can create separate transactions for each module’s deployment. This will ensure that the necessary components are deployed in a single batch.

Best Method: Using a Transaction Builder

Alternatively, you can use a transaction builder to simplify the process of deploying multiple safe contracts with modules enabled. One popular option is the txBuilder library, which provides a simple API for building transactions on the Ethereum network.

Here’s an example of how you might create two separate transactions:

“`solidity

pragma solidity ^0.8.0;

import “

contract Owner {

address public owner;

mapping(address => bool) public isOwner;

constructor() public {

owner = msg.sender;

isOwner[msg.sender] = true;

}

function deposit() public payable {

require(isOwner[msg.sender], “You are not the owner of this safe.”);

// Add your own logic to handle deposits here

}

}

contract Safe1 {

address public owner1;

mapping(address => bool) public isOwner;

constructor() public {

owner1 = msg.