.swift

   private var drivingRecordSmartContract :DrivingRecordSmartContract = DrivingRecordSmartContract()
 
func getNextBlock(transactions :[Transaction]) -> Block {
        
        let block = Block()
        transactions.forEach { transaction in
            
            // applying smart contract
            self.drivingRecordSmartContract.apply(transaction: transaction, allBlocks: self.blocks)
            
            block.addTransaction(transaction: transaction)
        }
        
        let previousBlock = getPreviousBlock()
        block.index = self.blocks.count
        block.previousHash = previousBlock.hash
        block.hash = generateHash(for: block)
        return block
        
    }