Ethereum的日志可以用来做什么？In the traditional world, applications often use logs to capture and describe what’s going on at a specific moment. These logs are often used todebug applications, detect specific eventsnotify the viewer of the logs that something happenedinteracting with smart contracts!So how does Ethereum do it?Logging in EthereumThe EVM currently has 5 opcodes （创建log record）for emitting event logs: LOG0, LOG1, LOG2, LOG3, and LOG4. A log record can be used to describe an event within a ...