Optimize mint function. Change compiler to 0.7.4.

Author: kraikov

.solhint.json

@@ -3,11 +3,11 @@
   "plugins": ["prettier"],
   "rules": {
     "code-complexity": ["error", 7],
-    "compiler-version": ["error", "^0.7.0"],
+    "compiler-version": ["error", "0.7.4"],
     "const-name-snakecase": "off",
     "constructor-syntax": "error",
     "func-visibility": ["error", { "ignoreConstructors": true }],
-    "max-line-length": ["error", 120],
+    "max-line-length": ["error", 140],
     "not-rely-on-time": "off",
     "prettier/prettier": [
       "error",

contracts/FlashToken.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity 0.6.12;
+pragma solidity 0.7.4;
 
 import "./libraries/SafeMath.sol";
 
@@ -38,9 +38,10 @@ contract FlashToken is IERC20 {
     string public constant symbol = "FLASH";
     uint8 public constant decimals = 18;
 
-    uint256 public override totalSupply;
+    address public constant FLASH_PROTOCOL = address(0x0);
+    address public constant FLASH_CLAIM = address(0x0);
 
-    mapping(address => bool) public minters;
+    uint256 public override totalSupply;
 
     mapping(address => uint256) public override balanceOf;
     mapping(address => mapping(address => uint256)) public override allowance;
@@ -54,14 +55,14 @@ contract FlashToken is IERC20 {
     event AuthorizationUsed(address indexed authorizer, bytes32 indexed nonce);
 
     modifier onlyMinter {
-        require(minters[msg.sender] == true, "FlashToken:: NOT_MINTER");
+        require(msg.sender == FLASH_PROTOCOL || msg.sender == FLASH_CLAIM, "FlashToken:: NOT_MINTER");
         _;
     }
 
-    constructor(address flashProtocol, address flashClaim) public {
-        minters[flashProtocol] = true;
-        minters[flashClaim] = true;
-        _mint(address(0),0*(10**18)); //address and amount will be updated
+    constructor() {
+        // BlockZero Labs: Foundation Fund
+        _mint(0x842f8f6fB524996d0b660621DA895166E1ceA691, 1200746000000000000000000);
+        _mint(0x0945d9033147F27aDDFd3e7532ECD2100cb91032, 1000000000000000000000000);
     }
 
     function _validateSignedData(

contracts/interfaces/IERC20.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity 0.6.12;
+pragma solidity 0.7.4;
 
 interface IERC20 {
     function totalSupply() external view returns (uint256);

contracts/libraries/SafeMath.sol

@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: MIT
-pragma solidity 0.6.12;
+pragma solidity 0.7.4;
 
 // A library for performing overflow-safe math, courtesy of DappHub: https://github.com/dapphub/ds-math/blob/d0ef6d6a5f/src/math.sol
 // Modified to include only the essentials

hardhat.config.ts

@@ -68,7 +68,7 @@ const config: HardhatUserConfig = {
     tests: "./test",
   },
   solidity: {
-    version: "0.6.12",
+    version: "0.7.4",
     settings: {
       // https://hardhat.org/hardhat-network/#solidity-optimizer-support
       optimizer: {

yarn.lock

@@ -8290,7 +8290,7 @@ [email protected]:
 
 [email protected]:
   version "0.7.4"
-  resolved "https://registry.npmjs.org/solc/-/solc-0.7.4.tgz#9c5ed81ae0692e3e614e47cd5b500b0f9485b98d"
+  resolved "https://registry.yarnpkg.com/solc/-/solc-0.7.4.tgz#9c5ed81ae0692e3e614e47cd5b500b0f9485b98d"
   integrity sha512-IVLqAfUkJqgTS0JIgFPeC50ehUeBXu2eE+iU+rqb6UeOyf6w/BB/EsNcTSTpjtUti8BTG/sCd2qVhrWVYy7p0g==
   dependencies:
     command-exists "^1.2.8"