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Questions tagged [blockchain-fork]

This tag should be used for questions regarding any split in the Bitcoin blockchain

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What are Forward Blocks?

Mark Friedenbach says "Bitcoin’s Block Size Can Be Increased Without Hard Fork". Can someone ELI5 what are Forward Blocks?
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1answer
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Transaction in orphaned block question

This is a theoretical question. Assuming that a transaction (TX_A) with me on the receiving end gets added to the blockchain, I should be able to spend the amount I received. So I go on and spend it ...
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1answer
25 views

When does a blockchain fork resolution happen?

I understand that the forks are resolved by largest proof-of-work etc. but when do the miners decide to resolve a fork? Is it a network consensus or do each individual miner resolve at their own pace?
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Errors in block header at CBlockDiskPos(nFile=0, nPos=8) forking Monacoin

I'm trying to run some tests forking Monacoin. After I generate the genesis block, I get this error in the debug.log file. Errors in block header at CBlockDiskPos(nFile=0, nPos=8) Which of course ...
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1answer
24 views

Bitcoin version conundrum

Given that the Bitcoin node software not centrally controlled (auto updated) and many different versions and implementations exist around the world, how would a core change be possible if it is not ...
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1answer
18 views

What is the longnest blockchain fork that has been orphaned to date?

On this thread, the user asked what is the longest unintentional fork that Bitcoin had suffered. From the answers present, Bitcoin never had a >4 block fork until 2012. It has been 6 years though, ...
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36 views

How to fork in existent altcoin? [duplicate]

I am running altcoin from old bitcoin and am gonna hardfork. By Research, I know I should add my mined hash and time in checkpoint.cpp. To do so, I need to mine first, seperated from all peers to not ...
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1answer
31 views

Blockchain gets stucked if no blocks are mined

Yesterday I decided to fork a project, just for fun and to learn more about it. So, I forked a project, I generated my own genesis block, changed timestamps, nounce, keys, reset the min chain work. ...
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1answer
496 views

How can forks coexist even though only one of the is the longest chain?

We know Bitcoin has some forks like Bitcoin Cash and Litecoin. They make a new branch on chain, so how can they coexist without the shorter branches being discarded, and just the longest chain staying ...
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0answers
31 views

nLastPOWblock fork masternode

I'm trying to make fork masternode coin. At me all turned out, and works exactly that that moment when it is reached nLastPOWblock After that, generation of new blocks does not occur I noticed that in ...
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2answers
64 views

Why choose the longest chain before checking for double-spending?

Can we make the following changes to the current POW protocol to better avoid double-spending: a) For full/mining nodes that receive two chains, check if there are identical addresses that occur on ...
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40 views

Altcoin Fork: Wallet - Error opening Block Database

I forked a coin based on Banq. I changed everything and all worked fine. I could mine, blocks were syncing well without any problem etc. The problem comes when I set up the masternodes, I did setup ...
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164 views

Problem creating altcoin with masternodes

I forked an altcoin with masternodes to learn how to clone an altcoin and also to understand it more technically. So I forked one altcoin, changed everything and all worked fine. I could mine, blocks ...
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1answer
37 views

Is it possible to append new blocks to a block of arbitrary age?

First of all, I'm aware of 51% attacks and how they work. Though, I was wondering, if Bitcoin and other blockchains allow appending cryptographically valid, new blocks to blocks of arbitrary age (if ...
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0answers
81 views

How to hard fork a altcoin? [closed]

I have created a altcoin using the reference of LTC and already 170k blocks were formed. Now i want to change the conformation time as well as i want the difficulty to start from base difficulty....
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2answers
46 views

What happens to old transactions in case of a fork?

I'm confused about forking. What happens to the 'old' version of a blockchain and related transactions/data in case of a fork. Can they still be deleted or does the new branch still depend on them to ...
2
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1answer
67 views

Get transaction after certain (tx, block, time or other) using insight-api Bitcoin CASH

Now i can get all transactions by address (Bitcoin Cash) using this request to api: https://test-bch-insight.bitpay.com/api/txs/?address=qptaxxrqcz7qunclcvlcza9an6qlqqhzlya2d4e4fn But i want to get ...
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1answer
352 views

How to fork a cryptocurrency [closed]

I have cloned a coin and changed some variable to make it my own coin. I have launched it and have a few mining pools mining my coin. Going through the code I notice I have an error and the reward ...
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3answers
45 views

Why is a softfork unable to divide the network?

I was wondering why a soft fork cannot in principle divide the Bitcoin network as a hard fork can. I understand that a soft fork, by definition, involves only tightening the consensus rules, but the ...
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0answers
23 views

How to store bitcoins to easily claim hard forks later?

I had my bitcoins kept in a milti-signature, segwit address. After the fork of Bitcoin Cash, Gold, etc., I got to know that I can't claim my fork coins (or very difficult to claim, if possible). I ...
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2answers
85 views

How do the nodes divide after a hard fork? Soft Fork?

After a hard fork, what happens to the full nodes? Say 11,000 BTC full nodes existed prior to the fork. Do all 11,000 end up supporting both BCH and BTC? Or does BCH start building it's own network of ...
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1answer
86 views

what is forking attack? and different between forking attack and selfish mining?

I am a student who studies block-chain for these days. I have a question about forking attack and selfish mining in mining strategies as you see picture below I don't understand why miner should ...
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1answer
73 views

Would nine 1MB transactions potentially create havoc on the BitcoinCash network

It appears that the BitcoinCash chain is still on its original BCH main chain, and non-upgraded mines/exchanges/wallets can still transact there. What then would happen if nine (or more) 1MB ...
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0answers
25 views

Miners and Nodes: what are their role in protocol updates?

What are the different roles of miners and nodes for protocol updates (governance)? Which group is more important?
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0answers
17 views

I gave someone a bitcoin cash address to send btc and now it's not showing up on my bitcoin cash app [duplicate]

I am new to bitcoin so i made a mistake of sending my receiving address from bitcoin cash to an online casino I won money on. The bitcoin never showed up in the cash wallet app but when I look up the ...
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2answers
172 views

Any methods or tech to reduce the size of blockchain?

Are there any techs/methods applied or going to be applied on the bitcoin network to reduce the size of blockchain. It is really a burden for peroson to run a full-node especially on vps. Or what ...
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2answers
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Did I lost the chance to get my BCH from Aug 2017 fork?

I had some BTC before the BCH fork in my wallet, but I didn't know I could claim the same quantity on BCH too, I've just read about how "hard fork" works :( Then I sell my BTC, that means now I ...
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1answer
78 views

Explanation of probability of forks in the Bitcoin blockchain

I am reading this paper on how information is propagated on the Bitcoin network. The authors present a model to predict the rate at which forks occur in the blockchain which is given as below Here, F ...
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1answer
14 views

Is it possible to copy BTC balances of only some addresses while forking

I want to fork a Blockchain for private use, however I want to keep only balance of some known adresses for example if my adresses are @A(10BTC), @B(20BTC), @C(30BTC) I want to see same adresses with ...
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2answers
81 views

Does a 2009 client sync the whole bitcoin blockchain

So does a 2009 client sync the whole bitcoin blockchain and does the temporary split of 2013 have any impact on that?
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1answer
97 views

Why is wif prefix 0x80 more than pubKeyHash prefix

I forked a coin and found that whatever I put in pubKeyHash prefix, I need to add 0x80 to it, to calculate wif prefix and hence generate an address keypair, i.e address and private key corresponding ...
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1answer
50 views

How to make hardfork? [closed]

I understand what is hardfork in theory. Hardfork happens, when the consensus algorithm changes (if I'm wrong, correct me please). Ok, with theory everything is clear, but what about technical side of ...
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0answers
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Monero hardforks to kill off ASIC manufacturers, when was the last time something similar happen to another coin?

In the recent news, Monero hardforks to kill off ASIC manufacturers like Bitmain. When was the last time a similar thing happen where cyptocurrency devs changed the mining algorithm to deter a large ...
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1answer
39 views

How Multisignature Wallets are affected in case of a hard-fork?

In an event of forking, are there any special circumstances involving multisig wallets? I am asking this because Coinbase says they do not support forks and multisig wallets? Below is a quote from ...
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4answers
85 views

What would happen if two miners were mining two blocks with two different set of transactions?

If two miners picked from the mempool two different sets of transactions, that were not dependent on each other. Then could both miners, mine both blocks and not create a fork? So miner 1 finishes ...
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APIs for new bitcoin forks

Is there any api providers to access blockchain data of new bitcoin forks? In my search, I could only find apis for btc and bch.
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1answer
29 views

Is it possible to copy transactions between Bitcoin's forks blockchain?

Do Bitcoin forks share the same transaction protocol after the fork? If so, is it possible to copy/ duplicate a transaction that uses common input transactions in the other blockchain? Let me explain ...
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1answer
704 views

How to correctly set attributes for block hash and nBits in PIVX Fork?

I've cloned PIVX(basically a DASH fork) and modified basic parameters. It compiles fine. When I'm trying to run it the server starts and the debug log file shows following errors: ERROR: ...
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1answer
40 views

Is this a valid scenario in blockchain?

Is this a valid case in blockchain? if yes whether the reward for t1 is shared and if not, which block will be invalidated or why not everyone will prefer to solve the block with a single transaction
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2answers
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How did Bitcoin Cash fork from Bitcoin?

I was wondering how it was possible because of the following thinking: Let's assume that Bitcoin Cash's hashpower is smaller than Bitcoin's. Then they would start mining at the same point in the ...
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0answers
134 views

ERROR: AcceptBlock() : incorrect proof of work (DGW pre-fork) - 0.000732

Hi am trying to upgrade a wallet for a coin it is based on dash going from 10 to dash 11 and i got this error when trying to sync fresh any help thank you 2018-02-18 17:56:46 2 addresses found from ...
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1answer
51 views

Is it likely that bitcoin will implement important changes in the future? [closed]

Bitcoin is still the biggest cryptocurrency in terms of market cap, and it will always be the first one to solve some of the most fundamental problems around the implementation of a cryptographic coin....
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1answer
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While creating new crypto using fork need to generate smart contract? [closed]

I have 2 questions for creating nee crypto currency using fork. 1.) I have created one new crypto coin which is called mindcoin, now should i generate smart contract for deployment my currency in ...
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1answer
46 views

How do exchange services provide forked coins to their customers for free?

I know we can get forked coins by donating to ICO teams but I don't think the exchange services donte to them. So I really consider how to get forked coins for free
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2answers
57 views

Mining Fee for the blocks that are orphaned

Suppose a miner mined a block and the block got added in the main chain of the block chain. He must have got his mining fee then. Now suppose that due to a fork sometimes later, the block that he ...
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4answers
519 views

Why do we need a genesis block?

In bitcoin, a blockchain always starts at the unique genesis block. Beyond that point there can be forks, and only when it is clear which branch will grow fastest (or if it has grown enough), we can ...
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1answer
67 views

How do coins upgrade there blockchain from 10v or 11v to 12v

Hi am a 15 year old who wants to do this for a living so i don't read much so i learn better by doing it. So i wanted to upgrade a wallet to a newer version. So i did it all after my 1000th attempt it ...
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1answer
207 views

bitcoin fork getblocktemplate keeps reporting downloading blocks

I got my own hard fork of bitcoin from forkgen.tech. The fork has happened after block 506016. I have 2 nodes running and after syncing up to block 506016, I want to run a pool server. But the ...
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1answer
69 views

I have set blockgeneration time to 15 second but blocks are generated with the speed of 1 block per min(avg)

I have forked Litcoin 0.8v to make my own costomized coin(learning purpose), with some changes in parameters: 1. Total no of coins to be mined = 270,000,000. 2. Block formation time = 15sec. 3. ...
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0answers
16 views

Sendig bitcoin created before the fork of aug 2017

Does anyone have any experience sending bitcoin, prior to the hard fork of August 2017 to a nano S adress. Is the nano S able to make the split between BCH and BTC?