Ethereum: Create deterministic address without create2

Creating Deterministic Ethereum Addresses Without create2

In Solidity, creating a deterministic (i.e., unique) address is crucial when working with private keys and accounts. However, Truffle’s create2 function provides an alternative way to create addresses, especially when you don’t plan on deploying new contracts. In this article, we will explore how to create deterministic Ethereum addresses without using create2.

Understanding Deterministic Addresses

In Solidity, a deterministic address is one that always produces the same output given the same input (private key). This ensures that users can trust their private keys and reduces the risk of account compromise.

create2 Functionality

The create2 function in Truffle allows you to create addresses with a fixed set of prefixes, such as 0x, 0xA, or 0xB. However, when using create2, you are limited to the available prefixes and cannot generate custom prefix combinations.

Creating Deterministic Addresses Without create2

To create deterministic addresses without create2, you will need to use a different approach. One solution is to use a library such as ethers-polyfill-accounts or truffle-ethers. These libraries provide a way to work with Ethereum accounts and generate custom prefixes.

Here is an example of how you can create a deterministic address without using create2:

Install the required library

First install the required library:

npm install ethers-polyfill-accounts

Create a custom address function

Create a new Solidity file (e.g. addressFunction.sol) and add the following code:

pragma solidity ^0.8.0;

import "

contract CustomAddress {

function createDeterministicAddress() public returns (address) {

// Generate a random number to ensure uniqueness

uint256 random = uint256(keccak256(abi.encodePacked(block.timestamp)));

// Create a custom prefix

address newPrefix = 0x...; // Replace with the desired prefix

// Return the generated address

return keccak256(abi.encodePacked(newPrefix, random));

}

}

Use the custom address function

Now you can call the createDeterministicAddress function to generate a custom deterministic address:

CustomAddress memory address = CustomAddress(addressFunction);

addressAddress = address.createDeterministicAddress();

In this example, we define a custom contract called `CustomAddress'. ThecreateDeterministicAddressfunction generates a random number and uses it as the starting point for a custom prefix. This ensures that all generated addresses will be unique.

Conclusion

Ethereum: Create Deterministic address without create2

While usingcreate2can simplify your workflow in some cases, there are scenarios where creating deterministic addresses without it is necessary. By following this guide, you have learned how to create custom deterministic addresses in Solidity without relying on thecreate2function. Be sure to choose a library likeethers-polyfill-accountsortruffle-ethers` to work with Ethereum accounts and generate custom prefixes.

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