Quantoz Tokens

A comprehensive ERC-20 token implementation with upgradeable architecture, role-based access control (RBAC), and advanced security features including blocked list functionality.

Overview

The Quantoz tokens are upgradeable ERC-20 tokens built on OpenZeppelin's upgradeable contracts framework. The project includes multiple token implementations with different feature sets:

QuantozToken: Base token with owner-based minting/burning and blocked list functionality
QuantozTokenLZ: Upgraded version with RBAC (Role-Based Access Control) for enhanced security
ExampleUpgradedQuantozToken: Example of further upgrades demonstrating extensibility

Features

Core Features

Upgradeable Architecture: Built using OpenZeppelin's upgradeable contracts
ERC-20 Standard: Full ERC-20 compliance with additional features
ERC-20 Permit: Support for gasless approvals via EIP-2612
Custom Decimals: Configurable decimal places (1-18)

Security Features

Blocked List: Ability to block/unblock addresses from transfers
Owner Controls: Only owner can add/remove addresses from blocked list
Transfer Restrictions: Blocked addresses cannot transfer tokens
Contract Address Protection: Prevents transfers to the token contract itself

RBAC Features (QuantozTokenLZ)

Role-Based Access Control: Replaces owner-only permissions with roles
MINTER_ROLE: Can mint new tokens
BURNER_ROLE: Can burn tokens from any address
DEFAULT_ADMIN_ROLE: Can manage other roles
Backward Compatibility: Maintains all original functionality

Contract Architecture

QuantozToken (Base Token)

contract QuantozToken is 
    ERC20PermitUpgradeable,        
    BlockedList
{
    // Core ERC-20 functionality
    // Owner-based minting/burning
    // Blocked list integration
}

QuantozTokenLZ (RBAC Upgrade)

contract QuantozTokenLZ is 
    QuantozToken,
    AccessControlUpgradeable
{
    // All QuantozToken features
    // Role-based minting/burning
    // Enhanced security model
}

BlockedList (Security Module)

contract BlockedList is OwnableUpgradeable {
    // Blocked address management
    // Transfer restrictions
    // Owner-only controls
}

Installation & Setup

Prerequisites

Node.js >= 16.0.0
npm >= 8.0.0
Hardhat
Foundry (for advanced testing)

Installation

# Clone the repository
git clone <repository-url>
cd quantoz-tokens

# Install dependencies
npm install

# Install Foundry (if not already installed)
curl -L https://foundry.paradigm.xyz | bash
foundryup

Environment Setup

Create a .env file with the following variables:

MNEMONIC=your_mnemonic_phrase_here
ETHEREUM_RPC_URL=your_ethereum_rpc_url
ETHERSCAN_TOKEN=your_etherscan_api_key

Usage

Deployment

Deploy Base Token

npx hardhat run scripts/deploy.js --network <network>

Deploy with Factory

npx hardhat run scripts/deployWithFactory.js --network <network>

Deploy MultiSig Wallet

npx hardhat run scripts/deployMultisig.js --network <network>

Upgrading Tokens

Upgrade to RBAC Version

const QuantozTokenLZ = await ethers.getContractFactory("QuantozTokenLZ");
await upgrades.upgradeProxy(tokenAddress, QuantozTokenLZ);

Setup RBAC Roles

// Grant initial roles to owner
await token.grantInitialRole();

// Grant specific roles
await token.grantRole(await token.MINTER_ROLE(), minterAddress);
await token.grantRole(await token.BURNER_ROLE(), burnerAddress);

Role Management

Grant Roles

npx hardhat run scripts/grantRole.js --network <network>

Grant Roles via MultiSig

npx hardhat run scripts/callgrantRoleMultisig.js --network <network>

Revoke Roles

npx hardhat run scripts/revokeRole.js --network <network>

Token Operations

Minting

// Owner-based (QuantozToken)
await token.connect(owner).mint(userAddress, amount);

// Role-based (QuantozTokenLZ)
await token.connect(minter).mint(userAddress, amount);

Burning

// Owner-based (QuantozToken)
await token.connect(owner).burn(userAddress, amount);

// Role-based (QuantozTokenLZ)
await token.connect(burner).burn(userAddress, amount);

Blocked List Management

// Add to blocked list
await token.connect(owner).addToBlockedList(userAddress);

// Remove from blocked list
await token.connect(owner).removeFromBlockedList(userAddress);

// Check if blocked
const isBlocked = await token.isBlocked(userAddress);

Testing

Run All Tests

npm test

Run Foundry Tests

forge test

Run Fuzz Tests

forge test --match-contract QuantozTokenFuzzTest

Test Coverage

npx hardhat coverage

Test Scenarios

The comprehensive test suite covers:

Upgrade Scenarios

Basic Upgrade: QuantozToken → QuantozTokenLZ
Multi-Step Upgrade: QuantozToken → QuantozTokenLZ → ExampleUpgradedQuantozToken
State Preservation: Balances, allowances, blocked lists maintained
Functionality Preservation: All original features work after upgrade

RBAC Testing

Role Assignment: Granting/revoking roles
Permission Testing: Role-based access control
Backward Compatibility: Original owner functions still work
Security: Non-role holders cannot perform restricted operations

Blocked List Testing

Block/Unblock: Adding/removing addresses
Transfer Restrictions: Blocked addresses cannot transfer
Owner Override: Owner can still burn from blocked addresses
Integration: Works with both base and RBAC versions

Security Testing

Input Validation: Zero address, zero amount checks
Permission Checks: Only authorized users can perform operations
Event Emission: Proper event logging

Security Features

Blocked List Security

Owner-Only Management: Only contract owner can modify blocked list
Zero Address Protection: Cannot block zero address
Transfer Prevention: Blocked addresses cannot transfer tokens
Owner Override: Owner can still burn from blocked addresses

RBAC Security

Role-Based Permissions: Granular access control
Admin Role Management: Only admins can grant/revoke roles
Separation of Concerns: Different roles for different operations
Backward Compatibility: Original owner functions preserved

General Security

Input Validation: Comprehensive parameter checking
Event Logging: All important operations emit events
Upgrade Safety: Safe upgrade patterns with state preservation

Network Configuration

The project supports multiple networks:

Mainnet

mainnet: {
  url: process.env.ETHEREUM_RPC_URL,
  chainId: 1,
  accounts: accounts
}

Polygon

polygon: {
  url: "https://polygon-mainnet.infura.io/v3/...",
  chainId: 137,
  accounts: accounts
}

Local Development

hardhat: {
  // Default Hardhat network
}

Scripts Reference

Deployment Scripts

deploy.js: Basic token deployment
deployWithFactory.js: Factory-based deployment
deployMultisig.js: MultiSig wallet deployment

Management Scripts

grantRole.js: Grant roles to addresses
revokeRole.js: Revoke roles from addresses
getOwner.js: Get current token owner
getProxyAdmin.js: Get proxy admin address

MultiSig Scripts

callgrantRoleMultisig.js: Grant roles via MultiSig
callGrantBurnerRoleMultisig.js: Grant burner role via MultiSig
callMintMultisig.js: Mint tokens via MultiSig
callBurnMultisig.js: Burn tokens via MultiSig
upgradeViaMultiSig.js: Upgrade token via MultiSig

Utility Scripts

debug.js: Debug token state
debugUpgradeIssue.js: Debug upgrade issues
transferOwnershipToMultiSig.js: Transfer ownership to MultiSig

Dependencies

Core Dependencies

@openzeppelin/contracts: 4.9.6
@openzeppelin/contracts-upgradeable: 4.9.6
hardhat: ^2.25.0

Development Dependencies

@openzeppelin/hardhat-upgrades: ^1.28.0
@nomicfoundation/hardhat-toolbox: ^2.0.2
@nomicfoundation/hardhat-foundry: ^1.1.2
solidity-coverage: ^0.8.2

License

QuantozToken: MIT License
BlockedList: Apache 2.0 License (based on Tether's implementation)

Contributing

Fork the repository
Create a feature branch
Make your changes
Add tests for new functionality
Ensure all tests pass
Submit a pull request

Support

For questions, issues, or contributions, please:

Check the existing issues
Review the test files for usage examples
Consult the UPGRADE_GUIDE.md for upgrade procedures
Create a new issue with detailed information

Version History

v1.0: Initial QuantozToken with blocked list functionality
v2.0: QuantozTokenLZ with RBAC upgrade
v3.0: Example upgrades demonstrating extensibility

Note: This project is designed for production use with proper security considerations. Always audit contracts before deployment and follow security best practices.

Name		Name	Last commit message	Last commit date
Latest commit History 7 Commits
contracts		contracts
lib/forge-std		lib/forge-std
test		test
.gitignore		.gitignore
.solcover.js		.solcover.js
README.md		README.md
foundry.toml		foundry.toml
hardhat.config.js		hardhat.config.js
package-lock.json		package-lock.json
package.json		package.json

QuantozTechnology/Quantoz.Contracts.Evm.ERC20Token

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Quantoz Tokens

Overview

Features

Core Features

Security Features

RBAC Features (QuantozTokenLZ)

Contract Architecture

QuantozToken (Base Token)

QuantozTokenLZ (RBAC Upgrade)

BlockedList (Security Module)

Installation & Setup

Prerequisites

Installation

Environment Setup

Usage

Deployment

Deploy Base Token

Deploy with Factory

Deploy MultiSig Wallet

Upgrading Tokens

Upgrade to RBAC Version

Setup RBAC Roles

Role Management

Grant Roles

Grant Roles via MultiSig

Revoke Roles

Token Operations

Minting

Burning

Blocked List Management

Testing

Run All Tests

Run Foundry Tests

Run Fuzz Tests

Test Coverage

Test Scenarios

Upgrade Scenarios

RBAC Testing

Blocked List Testing

Security Testing

Security Features

Blocked List Security

RBAC Security

General Security

Network Configuration

Mainnet

Polygon

Local Development

Scripts Reference

Deployment Scripts

Management Scripts

MultiSig Scripts

Utility Scripts

Dependencies

Core Dependencies

Development Dependencies

License

Contributing

Support

Version History

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