Questions tagged [blockchain-fork]

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

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1answer
39 views

Did the FIBRE protocol reduce the occurrence of chain forks?

I've just learned that Fibre protocol is used for really fast block propagation. My understanding is that if blocks are propagated faster, miners can more quickly continue to work on (what seems to ...
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1answer
39 views

Possibility of occurring Fork in case of using Proof-of-Stake?

Regarding the fact that in Proof-of-Stake, a stakeholder will be elected randomly as the next validator in each epoch (or each round), logically, in each round there is only a single validator, and so ...
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45 views

how to make own coin with soft fork? [closed]

What I am looking to do is soft fork on litecoin and create my own coin! I know that I need to make a node but I can't find any process that shows me how to create my own coin.
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182 views

Do HTLC transactions work today or do they need a new soft-fork?

I thought that HTLCs were just a kind of a script construct that would allow to unlock funds for a period of time, which can be unlocked to anyone that provides the original string that matches the ...
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1answer
28 views

How a transaction is permanently accepted by the blockchain?

If a miner A creates a block containing a transaction A and a miner B creates a block NOT containing the transaction A about at the same time, then some of the other miners will first receive the ...
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1answer
128 views

Can replay transactions effect both chains? or just the minority hard fork chain?

Can a seg2x transaction be replayed on the main bitcoin CORE chain? I was reading that only the minority hard fork would need replay protection and that coins on the main majority chain would be ...
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1answer
2k views

Online wallet to redeem pre-fork paper wallet for both Bitcoin and Bitcoin Cash

I have BTC (pre-fork) and now BCH(BCC) on a paper wallet. What's the best online wallet to transfer them into to ensure I retain both coins and also to be able to transact with them?
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2answers
287 views

Will I be losing my BTG by sending BTC to bitfinex

I have my BTC in my trezor wallet (had it for a while before the BTG fork), now I would like to send some BTC to Bitfinex, but I am worried that if I do so, it will also send my BTG to the same ...
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1answer
183 views

Risk to Bitcoin balance when making Bitcoin Gold transactions

If Bitcoin Gold fails to implement replay protection, will I risk losing my Bitcoin when I make a Bitcoin Gold transaction? Assuming replay protection is not implemented properly, how can I protect ...
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1answer
48 views

How often does temporary fork occur and how long does it last?

I was wondering, how often does temporary forks occur? They appear when there are two different blocks mined based on the same previous block (parent block), but what are chances for that? And if fork ...
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1answer
30 views

Some miners set the nVersion field of the block header to 0x8000004. What were they signalling for? Was this an error?

Some miners set the nVersion field of the block header to 0x8000004. What were they signalling for? Is this an error? I have been through a lot of the BIP documentations, but cannot seem to find any ...
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1answer
79 views

Shorter Chains in blockdata

Assuming two blocks are published at exactly the same time, a race for the next block to be added to one of them begins, which eventually one chain will eventually win. My question: will the shorter ...
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1answer
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What was the first BIP9 block? Block 370,434 (0x20000007) or Block 398,364 (0x30000000)?

Block 370,434 (00100000000000000000000000000111) and (0x20000007) Yes: BIP9 says set top 3 bits to 001. No: BIP101 explicitly says set first, second, third and 30th bits to 1. No: No mention of BIP9 ...
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2answers
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Is there an RPC command that checks for hardforks

There are some useful RPC commands that you can use in your bitcoin.conf file to trigger code when blocks have been confirmed, such as the blocknotify command. Is there are similar command that will ...
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2answers
3k views

How does a double spend get resolved when two miners find conflicting blocks at the same time?

I was trying to learn about Bitcoin and its flow. Actually, I was stuck how the control flows in solving the double spend. For eg. if Ta and Tb are a double spend of the same transaction with ...
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0answers
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Which major/noteworthy BIPs, Soft-Forks and Hard Forks have there been since the Summer of 2017 (after SegWit/Bitcoin Cash)?

There are many lists of major forks however most of them end after SegWit. The full list of BIPs is extensive. Which noteworthy BIPs, Soft Forks and Hard Forks have there been since SegWit and Bitcoin ...
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26 views

What is the probability of having forks in PoW given different network size (miners count)?

Given a blockchain network of n nodes, where m of them are miners (m < n), what is the impact of m on the probability of having forks in Bitcoin or any PoW-based blockchain? It is clear for me ...
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1answer
122 views

Given the current situation, what currently available Bitcoin clients are the most likely to follow the longest chain one month from now?

I am completely lost with the various BIPs and what exactly every client implements. So given the current situation as of July 2017, what currently available Bitcoin clients are the most likely to ...
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1answer
32 views

Why is creating a bitcoin fork very difficult and a Ethereum fork easy?

There are a dozen of projects based on Ethereum but very few based on the Bitcoin network. Why is this?
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2answers
41 views

Bitcoin block maturity and block reward rules

According to the Bitcoin wiki: "When a block becomes an orphan block, all of its valid transactions are re-added to the pool of queued transactions and will be included in another block. The 50 BTC ...
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1answer
27 views

Any side-effects of upgrading to HD wallet in relationship to hard forks

I have a very old wallet that I created about 7.5 years ago. I realize that I need to upgrade to a BIP32 (HD) wallet. I am up to date with the latest Bitcoin Core and have kept it relatively up-to-...
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22 views

How does hard fork lead to a double spending attack?

I read some article mentioned that hard fork may lead to a double spending attack. I wonder how? And i have one more question: will the bitcoin wallet address change after the hard fork?
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1answer
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Can the forked be unforked? [closed]

So: BTC, BCH, BTG and BSV all trade at different prices/values. All have forked off from BTC and have different development teams, theories, practices, technology, etc. I noticed that when you look ...
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2answers
225 views

Does a 2009 node sync the whole bitcoin blockchain

So does a 2009 node sync the whole bitcoin blockchain and does the temporary split of 2013 have any impact on that?
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0answers
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Fork rate range in terms of network security

I am really new to bitcoin and am trying to understand the basics. Fork rate/Orphan rate is a measure of network security. The higher the fork rate, the more compromised the system. Also fork rate ...
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44 views

How do i have a 2011 bch transaction?

I was under the impression that BCH did not fork untill 2017. How was i making transactions in 2011?
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1answer
32 views

If I am on a fork, can the reindex parameter fix this?

I've been reading confusing information online about what the --reindex startup parameter does. This link is not clear to me. https://github.com/bitcoin/bitcoin/blob/...
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1answer
50 views

Bitcoin Orphan blocks - short question about the “time lag” factor and proof-of-work “size”

"However, it is possible that two miners produce a block at a similar time. This situation occurs because the acceptance of the blocks into the blockchain by the nodes of the blockchain network ...
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1answer
87 views

Is it possible to alter the source code and still have a valid Bitcoin transaction?

Say I wanted to run an alternative version of Bitcoin, and I changed 1 line in the bitcoin source code. Is the signature/hash of the completed transaction going be the same or different when I run ...
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1answer
83 views

Fork and Longest Chain Rule

At the same time, A and B succeed in resolving the "Proof of work" challenge and both add a new block to their local blockchain, then they propagate the new blockchains to other nodes. I have 2 ...
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1answer
45 views

Understand double spending through an example

Let’s suppose you have 1 BTC which you try to spend twice. You made the 1 BTC transaction to a merchant (Transaction T1). Now, you again sign and send the same 1 BTC on another Bitcoin address to try ...
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2answers
158 views

Can a blockchain's transactions be reversed?

Blockchains are often described as 'immutable' (meaning the history cannot be rewritten after the fact), but is this really true? How easy is it to change the history? I have read about the Etheruem ...
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220 views

Are no orphaned blocks mined in the Bitcoin network?

I can't find orphaned blocks in the Bitcoin network from July with references to blockchain.info. Does this mean the bitcoin network centralization? I like C. Decker's paper "Information Propagation ...
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1answer
149 views

A Blockchain that merges mining forks and could be more power-efficient? [closed]

I'm new to blockchain technology so I'm sorry if I'm using wrong terminology. This is not a Bitcoin question, but a general blockchain question. Imagine a theoretical blockchain that uses gradual ...
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1answer
928 views

Could miners possibly steal SegWit transactions on The Real Bitcoin? [closed]

Going to be lolz epic when all the SegWit transactions are double-spent, i.e. stolen by miners on The Real Bitcoin (the legacy Satoshi blockchain). Can anyone offer any refutation, confirmation, or ...
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1answer
51 views

Chain Race: How to know chain-length of competing chain?

If a fork happens, miners mine on the block they receive at first. Further, they only forward the block they received first (so the block they will use to mine)! So it can happen that 10% of the ...
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2answers
62 views

What happens when the last added block in a blockchain is corrupted?

What happens when the last added block in a blockchain is corrupted? Is it still possible for the block to be accepted by a majority of the miners?
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1answer
170 views

“Fork choice rule” : A general term? or a specific algorithm?

Is "Fork choice rule" a general term including all the algorithms used for choosing a branch among other branches in a fork (including longest chain rule in Bitcoin etc) ? Or is it a specific ...
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1answer
38 views

How can Bitcoin protect itself from a “dumb majority soft fork”?

Let's say a majority of miners change to using software that prohibits timelocks. This would be a softfork, so the blockchain would still look valid to nodes using the previous software, however nodes ...
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1answer
53 views

Bitcoin Core mempool after disconnecting a block

After reading this answer by Pieter about "undo files" I'm wondering what happens with transactions that were included in orphaned blocks but are left out the new blocks when "rolling back". Are they ...
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1answer
322 views

How bitcoin nodes update UTXO set when their latests blocks are replaced?

Let's say bitcoin node has 100 blocks. Then he recieve another two blocks. Now it have 102 blocks. But now he recieve block 103. And this block is from another chain and our node have to remove blocks ...
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1answer
66 views

Does the pool miners in mining pool receive the same block in case of a fork?

For example there are 2 mining pools A and B and they mined a block in same time. Then, A mining pool got a block that A mining pool mined? Or nodes in mining pool receive independently so they ...
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1answer
115 views

I mined in early 2010 with a cpu miner and just found my keys after forgetting all thease years, no joke need info please

who is the best most reputable bitcoin recovery company? I have added details and questions about our situation below Thank you And God Bless what was the mining program from the devs back then? I ...
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1answer
56 views

Bitcoin fork resolution - Fork losers download previous blocks 'til common block?

When resolving a naturally occurring fork in Bitcoin, do the miners who were working on the orphaned fork download previous blocks from the miner who won the block reward that resolved the fork until ...
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2answers
167 views

why 'increasing the block size above 1 MB requires a hard fork.” actually not require fork?

in this link, they say “increasing the block size above 1 MB requires a hard fork.” In this example, an actual block chain fork is not required—but it is a possible outcome. but i can't ...
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1answer
73 views

what happens if a miner include a transaction already exists in another block?

Suppose that I have a Transaction A. (txA) I send my txA to bitcoin network and full node validate it and put in Mempool and starts to broadcasting it. A Miner A connect to a fullnode to create a ...
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2answers
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Ardor Transaction was generated on a fork error

I tried to sign a transaction and then broadcast it, but I get the following error: Error! Failed to broadcast transaction: ecBlockHeight 221000 does not match ecBlockId 932...., transaction was ...
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4answers
1k views

How often forks occur?

How often do forks occur in the block chain? I'm interested in the small, one block forks that happen when two miners create a block at the similar time.
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In overview, what is “Bitcoin Cash” and the hard fork on August 1st 2017?

In overview, what is Bitcoin Cash? How is it different from legacy bitcoin? What is the blockchain hard fork which was supposed to happen on August 1st, 2017? Who benefits from the fork? Who is ...
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1answer
117 views

How to determine the remaining Bitcoin Cash after the hardfork?

This is some thought I had in mind for sometime which I couldn't come up with a proper explanation. Please excuse me if this is a stupid question. I have read the following on few articles on the ...

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