为什么在私有以太坊区块链上部署智能合约需要消耗gas费，而调用不需要？

Question

Why does the deployment of smart contracts on the private Ethereum chain need to consume gasoline, while the invocation does not?

Answer 1

When you're deploying a contract, you're sending a transaction , effectively storing the contract bytecode in the network. All transactions cost gas fees as a reward for the miner/validator who executes it and publishes it to the network.

When you're invoking a contract function, you can do it two ways:

• read-only gas-free call that is not processed by a miner/validator - only by a node that your app is connected to. You don't pay any gas fees, but also cannot store any changes (eg token transfers)
• read-write transaction that costs gas fees as a reward for the miner/validator