Sepolia Testnet Deployment

// SPDX-License-Identifier: MIT pragma solidity ^0.8.19; import "@openzeppelin/contracts/token/ERC20/ERC20.sol"; import "@openzeppelin/contracts/token/ERC20/extensions/ERC20Pausable.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/security/ReentrancyGuard.sol"; /** * @title NVC Treasury Token (NVCT-T) * @dev Institutional-grade ERC20 token with enhanced security features * @dev Backed by $56.7T court-validated assets with 189% over-collateralization */ contract NVCTreasuryToken is ERC20, ERC20Pausable, Ownable, ReentrancyGuard { uint256 public constant MAX_SUPPLY = 1_000_000_000 * 10**18; // 1 billion NVCT-T mapping(address => bool) public frozenAccounts; mapping(address => bool) public authorizedMinters; event AccountFrozen(address indexed account); event AccountUnfrozen(address indexed account); event AuthorizedMinterAdded(address indexed minter); event AuthorizedMinterRemoved(address indexed minter); constructor() ERC20("NVC Treasury Token", "NVCT-T") { // Deploy with initial supply for institutional treasury operations _mint(msg.sender, MAX_SUPPLY); authorizedMinters[msg.sender] = true; } /** * @dev Validates supply limits before minting */ function validateSupplyLimits(uint256 amount) public view returns (bool) { return totalSupply() + amount <= MAX_SUPPLY; } /** * @dev Mint tokens with supply validation and authorization checks */ function mint(address to, uint256 amount) public nonReentrant { require(authorizedMinters[msg.sender], "NVCT-T: Unauthorized minter"); require(validateSupplyLimits(amount), "NVCT-T: Exceeds maximum supply"); require(!frozenAccounts[to], "NVCT-T: Account is frozen"); _mint(to, amount); } /** * @dev Freeze account for compliance purposes */ function freezeAccount(address account) public onlyOwner { frozenAccounts[account] = true; emit AccountFrozen(account); } /** * @dev Unfreeze account */ function unfreezeAccount(address account) public onlyOwner { frozenAccounts[account] = false; emit AccountUnfrozen(account); } /** * @dev Add authorized minter with dual-level authorization */ function addAuthorizedMinter(address minter) public onlyOwner { authorizedMinters[minter] = true; emit AuthorizedMinterAdded(minter); } /** * @dev Remove authorized minter */ function removeAuthorizedMinter(address minter) public onlyOwner { authorizedMinters[minter] = false; emit AuthorizedMinterRemoved(minter); } /** * @dev Override transfer to check frozen accounts */ function _beforeTokenTransfer(address from, address to, uint256 amount) internal override(ERC20, ERC20Pausable) { require(!frozenAccounts[from], "NVCT-T: From account is frozen"); require(!frozenAccounts[to], "NVCT-T: To account is frozen"); super._beforeTokenTransfer(from, to, amount); } /** * @dev Emergency pause function */ function pause() public onlyOwner { _pause(); } /** * @dev Unpause function */ function unpause() public onlyOwner { _unpause(); } /** * @dev Asset backing verification */ function getAssetBacking() public pure returns (string memory) { return "$56.7T court-validated assets - 189% over-collateralization"; } }