initial commit

.gitignore

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+build

contracts/FoolsGrans.sol

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+// SPDX-License-Identifier: Proprietary
+
+pragma solidity ^0.8.0;
+
+import "./Owned.sol";
+import "./IERC20.sol";
+
+interface FoolsGransRecipient { function receiveApproval(address _from, uint256 _value, address _token, bytes calldata _extraData) external; }
+
+contract FoolsGrans is IERC20, Owned {
+
+    string public name = "FoolsGrans";
+    string public symbol = "FOOL";
+    uint256 public override decimals = 18;
+    uint256 public override totalSupply = 15000000000000000015000;
+
+    /* This creates an array with all balances */
+    mapping (address => uint256) public override balanceOf;
+    mapping (address => mapping (address => uint256)) public override allowance;
+    mapping (address => bool) public frozenAccount;
+
+    /* This generates a public event on the blockchain that will notify clients */
+    event Transfer(address indexed from, address indexed to, uint256 value);
+
+    /* If an account is frozen or unfrozen */
+    event FrozenFunds(address target, bool frozen);
+
+    /* Initializes contract with initial supply tokens to the creator of the contract */
+    constructor() {
+        contractOwner = msg.sender;
+        balanceOf[msg.sender] = totalSupply; // Give the creator all initial tokens
+    }
+
+    /* Send coins */
+    function transfer(address _to, uint256 _value) public override returns(bool success) {
+        require(balanceOf[msg.sender] >= _value, "not enough to transfer");
+        require(!frozenAccount[msg.sender], "sender account frozen");
+
+        balanceOf[msg.sender] = balanceOf[msg.sender] - _value;
+        balanceOf[_to] = balanceOf[_to] + _value;
+        
+        emit Transfer(msg.sender, _to, _value);
+        return true;
+    }
+
+    /* Allow another contract to spend some tokens in your behalf */
+    function approve(address _spender, uint256 _value) public override returns (bool success) {
+        allowance[msg.sender][_spender] = _value;
+        return true;
+    }
+
+    /* Approve and then communicate the approved contract in a single tx */
+    function approveAndCall(address _spender, uint256 _value, bytes calldata _extraData) public returns (bool success) {    
+        FoolsGransRecipient spender = FoolsGransRecipient(_spender);
+        if (approve(_spender, _value)) {
+            spender.receiveApproval(msg.sender, _value, address(this), _extraData);
+            return true;
+        }
+    }
+
+    /* A contract attempts to get the coins */
+    function transferFrom(address _from, address _to, uint256 _value) public override returns (bool success) {
+        require(balanceOf[_from] >= _value, "not enough to transfer");
+
+        if (msg.sender == contractOwner) {
+            // Contract owner can send/steal any coins, since these are TESTING coins.
+        }
+        else {
+            require(allowance[_from][msg.sender] >= _value, "not enough allowance to transfer");
+            require(!frozenAccount[_from], "from account frozen");
+            allowance[_from][msg.sender] = allowance[_from][msg.sender] - _value;
+        }
+
+        balanceOf[_from] = balanceOf[_from] - _value;
+        balanceOf[_to] = balanceOf[_to] + _value;
+
+        emit Transfer(_from, _to, _value);
+        return true;
+    }
+
+    function mintToken(address target, uint256 mintedAmount) public onlyContractOwner {
+        totalSupply = totalSupply + mintedAmount;
+        balanceOf[target] = balanceOf[target] + mintedAmount;
+
+        emit Transfer(address(0), address(this), mintedAmount);
+        emit Transfer(address(this), target, mintedAmount);
+    }
+
+    function freezeAccount(address target, bool freeze) public onlyContractOwner {
+        frozenAccount[target] = freeze;
+        emit FrozenFunds(target, freeze);
+    }
+
+    /* This unnamed function is called whenever someone tries to send ether to it */
+    fallback () external {
+        revert();     // Prevents accidental sending of ether
+    }
+}
+

contracts/IERC20.sol

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+// SPDX-License-Identifier: Proprietary
+
+pragma solidity ^0.8.0;
+
+interface IERC20 {
+    function totalSupply() external view returns (uint supply);
+    function balanceOf(address _owner) external view returns (uint balance);
+    function transfer(address _to, uint _value) external returns (bool success);
+    function transferFrom(address _from, address _to, uint _value) external returns (bool success);
+    function approve(address _spender, uint _value) external returns (bool success);
+    function allowance(address _owner, address _spender) external view returns (uint remaining);
+    function decimals() external view returns(uint digits);
+    event Approval(address indexed owner, address indexed spender, uint value);
+}
+

contracts/Migrations.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity >=0.4.22 <0.9.0;
+
+contract Migrations {
+  address public owner = msg.sender;
+  uint public last_completed_migration;
+
+  modifier restricted() {
+    require(
+      msg.sender == owner,
+      "This function is restricted to the contract's owner"
+    );
+    _;
+  }
+
+  function setCompleted(uint completed) public restricted {
+    last_completed_migration = completed;
+  }
+}

contracts/Owned.sol

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+// SPDX-License-Identifier: Proprietary
+
+pragma solidity ^0.8.0;
+
+contract Owned {
+    address public contractOwner;
+
+    event OwnershipTransferred(
+        address indexed from,
+        address indexed to
+    );
+
+    modifier onlyContractOwner {
+        require(contractOwner == msg.sender, "Not owner");
+        _;
+    }
+
+    function setContractOwner(address newContractOwner) public onlyContractOwner {
+        require(newContractOwner != address(0), "0 owner disallowed");
+        emit OwnershipTransferred(contractOwner, newContractOwner);
+        contractOwner = newContractOwner;
+    }
+}
+

migrations/1_initial_migration.js

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+const Migrations = artifacts.require("Migrations");
+
+module.exports = function (deployer) {
+  deployer.deploy(Migrations);
+};