Chapter 3

1. A Solidity contract can be large enough to be deployed into a single block of Ethereum blockchain. An Ethereum block has a maximum gas limit that, at the time of writing, is 8 million gas units. If your contract takes 8 million or less gas units at the time of deployment, you can deploy your contract on the blockchain. If it takes more gas than 8 million gas units, consider enabling optimization on your contract; this would reduce the amount of gas significantly. If, even after enabling optimization, your contract is still taking more than 8 million gas units, then you would have to break your contracts into multiple contracts and link those contracts together with interfaces.

2. Prior to Solidity version 0.4.22, you could define a function as having the same name as the contract. That function becomes the constructor of the contract; however, this was deprecated...