Add Alternatives to OpenZeppelin to gas optimization

[jackleeio]

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Name	Status	Preview	Comments	Updated (UTC)
conflux-documentation	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Oct 10, 2024 3:53pm

[0xn1c0]

The smart contract has some issues and cannot be compiled or deployed like that.
Issues found are:

• The mint function is not defined in the base ERC20 contracts from Solmate or Solady by default. The mint functionality needs to be explicitly implemented in the SolmateToken and SoladyToken contracts.
• Conflicting declarations of the ERC20 identifier, as you are importing different versions of the ERC20 contract from OpenZeppelin, Solmate, and Solady, all of which define a contract named ERC20. To fix this, you need to alias the imported contracts to avoid name conflicts. You can do this by renaming the imports for Solmate and Solady's ERC20 implementations in your Solidity file.

Here is the corrected smart contract:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

// OpenZeppelin ERC20
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";

// Solmate ERC20 (alias as SolmateERC20)
import {ERC20 as SolmateERC20} from "node_modules/solmate/src/tokens/ERC20.sol";

// Solady ERC20 (alias as SoladyERC20)
import {ERC20 as SoladyERC20} from "node_modules/solady/src/tokens/ERC20.sol";

contract OpenZeppelinToken is ERC20 {
    constructor(uint256 initialSupply) ERC20("OpenZeppelinToken", "OZT") {
        _mint(msg.sender, initialSupply);
    }
}

contract SolmateToken is SolmateERC20 {
    constructor(uint256 initialSupply) SolmateERC20("SolmateToken", "SMT", 18) {
        _mint(msg.sender, initialSupply); // Using _mint because Solmate doesn’t provide mint by default
    }

    function mint(address to, uint256 amount) public {
        _mint(to, amount); // Implement mint function
    }
}

contract SoladyToken is SoladyERC20 {
    constructor(uint256 initialSupply) {
        _mint(msg.sender, initialSupply); // Using _mint because Solady doesn’t provide mint by default
    }

    function mint(address to, uint256 amount) public {
        _mint(to, amount); // Implement mint function
    }

    function name() public pure override returns (string memory) {
        return "SoladyToken";
    }

    function symbol() public pure override returns (string memory) {
        return "SDT";
    }

    function decimals() public pure override returns (uint8) {
        return 18;
    }
}