package core import ( "fmt" "time" ) type BlockchainLoggingObserver struct{} func (blockchainObserver BlockchainLoggingObserver) NotifyBlockAdded(block Block) { fmt.Printf("New block was added: %d\n"+ "\tTime: %v\n"+ "\tGas Limit: %d\n"+ "\tGas Used: %d\n"+ "\tNumber of Transactions %d\n", block.Number, time.Unix(block.Time.Int64(), 0), block.GasLimit, block.GasUsed, len(block.Transactions)) }