Skip to main content

Import Required Libraries

First, we need to import the necessary contracts and libraries:

Contract Definition

Our confidential ERC20 contract inherits from Ownable2Step, which provides secure ownership management:
The Ownable2Step contract from OpenZeppelin sets the owner in the constructor, allowing only the owner to view all users’ balances.

State Variables

We need to define our state variables, including encrypted balances and allowances:
Notice that balances, allowances, and totalSupply use the euint256 type for encrypted storage.

Events

Define the standard ERC20 events plus custom events for minting:

Understanding the Structure

Encrypted Types

euint256 is used for encrypted integers, ensuring balance privacy

Access Control

Ownable2Step provides secure ownership management

Events

Events enable tracking transfers and approvals without revealing amounts

Next Steps

Continue to learn how to implement the core token functionality