Ethereum Cookbook

How to do it...

1. You can send Ether to a contract even if it does not implement a payable function. Generally, sending Ether to a non-payable function will result in a failed transaction.
2. A developer can easily overlook this and include some conditions in the contract that check for strict balance equality:

require(this.balance == 1 ether);

3. Using such conditions can result in a permanent Denial Of Service (DoS) and can make the contract useless.
4. There are multiple methods to force Ether to a contract. It can either be sent through the self-destruct function or by guessing a contract address that might be created in the future.

5. The self-destruct function is generally used for removing the data of a contract from the blockchain. It also ...