Solidity – Deploying a Smart Contract to Polygon Matic

The problem is clear but I can't quite extrapolate from the errant code to intent.

Coin won't deploy because it declares a function transfer without defining what's supposed to happen (the {} block isn't defined). This is a useful pattern when you get into inheritance but if was allowed to be deployed like this, then there would be a contract with an undefined function, and that won't do.

Since it's early days, I might suggest playing around with this simplified thingy that might help you form a mental picture of what's happening.

contract Test {

  event LogTest(address sender, address toWhom, uint amount);

  function test(address whom, uint256 amount) public returns(bool success) {
    LogTest(msg.sender, whom, amount);
    return true;
  }
}

Hope it helps.