blockchainedlist's Introduction

BlockChainedList

Attemp to Java Collection implementation for conceptual Block Chain.

This version 1.0 contains basic BlockChain List implementation only. Wallet/Transaction concept will be updated as part of version 2.0

Following test code shows : adding blocks to list, validating chain, tampering and validating:

package myapp;

import blocklist.utils.BlockChainList;

public class BlockListTest {
    public static void main(String[] arg){
	    System.out.println("Adding blocks to list...");
	    BlockChainList<String> bCList = new BlockChainList<String>(5);
	    bCList.add("Block1 Data");
	    System.out.println("Added 1");
	    bCList.add("Block2 Data");
	    System.out.println("Added 2");
	    bCList.add("Block3 Data");
	    System.out.println("Added 3");
	    bCList.add("Block4 Data");
	    System.out.println("Added 4");
	    
	    System.out.println("Is Chain Valid? : "+bCList.isChainValid());
		
	    //Tampering
	    bCList.get(2).setData("Something else");
	    
	    System.out.println("Is Chain Valid after Tampering? : "+bCList.isChainValid());
    }
}

Output:

Adding blocks to list...
Block Mined!!! : Curr: 000000222fa6a57e499011c543ef4d436cc7f63a3148ce7e72afec290da14899 Prev: 0 nonce : 3175611
Added 1
Block Mined!!! : Curr: 0000021782191b32061bd5210e8176db55d09990e4f296039f9b8d64be5f3933 Prev: 000000222fa6a57e499011c543ef4d436cc7f63a3148ce7e72afec290da14899 nonce : 922002
Added 2
Block Mined!!! : Curr: 0000097a62d1392a73e1ea064ff89b665e84f5fb7b7a8b81932846d7ba82c6a7 Prev: 0000021782191b32061bd5210e8176db55d09990e4f296039f9b8d64be5f3933 nonce : 59768
Added 3
Block Mined!!! : Curr: 00000e077f27def5ca15c5ba98f87176b62bf7e22ef099ea42cda6db038630a1 Prev: 0000097a62d1392a73e1ea064ff89b665e84f5fb7b7a8b81932846d7ba82c6a7 nonce : 2313843
Added 4
Is Chain Valid? : true
Is Chain Valid after Tampering? : false

Recommend Projects