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December 21, 2020 17:54
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Created using remix-ide: Realtime Ethereum Contract Compiler and Runtime. Load this file by pasting this gists URL or ID at https://remix.ethereum.org/#version=soljson-v0.6.12+commit.27d51765.js&optimize=false&runs=200&gist=
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| // SPDX-License-Identifier: MIT | |
| pragma solidity ^0.6.0; | |
| import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v3.2.0/contracts/token/ERC721/ERC721.sol"; | |
| import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v3.2.0/contracts/token/ERC721/ERC721Burnable.sol"; | |
| import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v3.2.0/contracts/token/ERC721/ERC721Pausable.sol"; | |
| import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/release-v3.2.0/contracts/token/ERC721/ERC721Holder.sol"; | |
| import './Ownable.sol'; | |
| contract M2Coin is ERC721, ERC721Burnable, ERC721Holder, Ownable { | |
| //mapping (uint256 => string) private _tokenJson; | |
| //mapping(address => bool) internal minters; | |
| //mapping(address => uint256) internal minterAllowed; | |
| //event Mint(address indexed minter, address indexed to, uint256 amount); | |
| //event Burn(address indexed burner, uint256 amount); | |
| constructor (string memory name, string memory symbol) public ERC721(name, symbol){ | |
| _name = name; | |
| _symbol = symbol; | |
| } | |
| string private _name; | |
| string private _symbol; | |
| bool internal initialized; | |
| mapping(address => bool) internal minters; | |
| modifier onlyMinters() { | |
| require(minters[msg.sender] == true); | |
| _; | |
| } | |
| function initialize( | |
| string memory name, | |
| string memory symbol, | |
| address _owner | |
| ) public { | |
| require(!initialized); | |
| require(_owner != address(0)); | |
| _name = name; | |
| _symbol = symbol; | |
| setOwner(_owner); | |
| initialized = true; | |
| } | |
| function isMinter(address account) public view returns (bool) { | |
| return minters[account]; | |
| } | |
| function configureMinter(address minter) public onlyOwner returns (bool) { | |
| minters[minter] = true; | |
| return true; | |
| } | |
| function removeMinter(address minter) public onlyOwner returns (bool) { | |
| minters[minter] = false; | |
| return true; | |
| } | |
| function mintTokensWithTokenURI(address to, uint256 totalTokens, string memory tokenURI) public onlyMinters returns (bool) { | |
| uint256 currentTokens = totalSupply(); | |
| for (uint256 tokenId = currentTokens + 1; tokenId <= currentTokens + totalTokens + 1; tokenId++) { | |
| _safeMint(to, tokenId, ""); | |
| _setTokenURI(tokenId, tokenURI); | |
| } | |
| return true; | |
| } | |
| } |
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| // SPDX-License-Identifier: MIT | |
| pragma solidity ^0.6.0; | |
| /** | |
| * @title Ownable | |
| * @dev The Ownable contract from https://github.com/zeppelinos/labs/blob/master/upgradeability_ownership/contracts/ownership/Ownable.sol | |
| * branch: master commit: 3887ab77b8adafba4a26ace002f3a684c1a3388b modified to: | |
| * 1) Add emit prefix to OwnershipTransferred event (7/13/18) | |
| * 2) Replace constructor with constructor syntax (7/13/18) | |
| * 3) consolidate OwnableStorage into this contract | |
| */ | |
| contract Ownable { | |
| // Owner of the contract | |
| address private _owner; | |
| /** | |
| * @dev Event to show ownership has been transferred | |
| * @param previousOwner representing the address of the previous owner | |
| * @param newOwner representing the address of the new owner | |
| */ | |
| event OwnershipTransferred(address previousOwner, address newOwner); | |
| /** | |
| * @dev The constructor sets the original owner of the contract to the sender account. | |
| */ | |
| constructor() public { | |
| setOwner(msg.sender); | |
| } | |
| /** | |
| * @dev Tells the address of the owner | |
| * @return the address of the owner | |
| */ | |
| function owner() public view returns (address) { | |
| return _owner; | |
| } | |
| /** | |
| * @dev Sets a new owner address | |
| */ | |
| function setOwner(address newOwner) internal { | |
| _owner = newOwner; | |
| } | |
| /** | |
| * @dev Throws if called by any account other than the owner. | |
| */ | |
| modifier onlyOwner() { | |
| require(msg.sender == owner()); | |
| _; | |
| } | |
| /** | |
| * @dev Allows the current owner to transfer control of the contract to a newOwner. | |
| * @param newOwner The address to transfer ownership to. | |
| */ | |
| function transferOwnership(address newOwner) public onlyOwner { | |
| require(newOwner != address(0)); | |
| emit OwnershipTransferred(owner(), newOwner); | |
| setOwner(newOwner); | |
| } | |
| } |
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