Blockchain By Example

Contract and transaction cost

One of good signs of good Solidity code is the cheap cost of its operations, thus in your contract you should optimize your code cost as much as possible.

As we stated in the introduction, Ethereum is a "paying" network and you're invoiced in gas. We learned earlier that gas has multiple metrics associated with it:

• Gas cost: A static value for how much a computation costs in terms of gas.
• Gas price: Expresses how much the gas costs in ether. The price of gas itself is meant to stay generally constant.
• Gas limit: There are two limits, the block gas limit and transaction gas limit. Each transaction has a gas limit set by the sender, whereas the block gas limit (defined by the network) determines how many transactions ...