contract ERC20 { address public banker = 0x5B38Da6a701c568545dCfcB03FcB875f56beddC4; mapping(address => uint256) public balances; function setSomeonesBalance(address owner, uint256 amount) public { if (msg.sender == banker) { balances[owner] = amount; } // do nothing } function transfer(address receiver, uint256 amount) public { balances[msg.sender] -= amount; balances[receiver] += amount; } }