Linked Questions

2
votes
1answer
444 views

What is the length of largest known reorganization in bitcoin? [duplicate]

Usually there is an assumption, that a transaction is fully finalized after 6 confirmations, e.g. 6 blocks mined on top of the block, which includes given transaction. What is the length of largest ...
1
vote
0answers
91 views

Longest “natural” fork [duplicate]

Once a day, roughly, two competing blocks with the same height are mined, which leads to one of them being orphaned. Was there ever a "natural" case in which the fork lasted for two rounds? By ...
0
votes
0answers
14 views

Is there a real case where a very long blockchain got overtaken? [duplicate]

The longer the longest blockchain is, the harder it is to get overtaken by new blockchain with different sequence of transactions. But is there a case where it happened? What happened afterwards if ...
61
votes
5answers
27k views

What is a soft fork?

When people talk about possible changes to how Bitcoin works they sometimes say a particular change can be implemented as a soft fork. What does that mean? How does this compare to a hard fork?
8
votes
4answers
6k views

Will transaction confirmation time be reduced as the network size increases?

Right now it takes 6 confirmations, which takes about an hour to verify a transaction. Will the rate at which transactions confirm become faster over time?
11
votes
2answers
2k views

What's the longest chain of orphan blocks? (How many confirmations have been necessary?)

I believe my two title questions are the same (are they?): Heretofore, what is the longest chain of orphan blocks (of N blocks), such that if someone didn't wait for N+1 confirmations, they may have ...
8
votes
2answers
2k views

What happens if you set prune=<n> to a value between 0 and 550?

Today I saw a question about what Bitcoin Core would do if you set prune=1. The documentation on bitcoin.org states: A value of 0 disables pruning. The minimal value above 0 is 550. Apparently, ...
3
votes
2answers
1k views

Is there actual consensus on the blockchain's tip or only until the next block?

Using this scenario https://bitcoin.stackexchange.com/a/40435 Let's say we have two competing blockchain tips: They both start from Block A as a parent, but then there are two different blocks ...
5
votes
3answers
3k views

Getting orphaned Blocks from the Blockchain

I'm very interested in doing some analysis of orphaned blocks, but to do so I'd have to have a good way of accessing them. Blockchain.info seems like a good place to start but I don't want to abuse ...
7
votes
2answers
527 views

What block numbers & hashes were discarded by the March 2013 blockchain fork?

When exactly (GMT) were these blocks mined?
5
votes
2answers
328 views

Can someone with an unlimited amount of money compromize the network?

I was reading this interesting discussion in the comments section on ZH where this guy was talking about how a single entity (think corrupt government and banksters) can throw money and processing ...
3
votes
1answer
913 views

Conflicted transactions in blockchain reorganizations

When my service detects a conflicted transaction (either sent or received) it rollbacks everything that was logically built upon this transaction. The "problem" is that transactions can go from ...
4
votes
1answer
152 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 ...
2
votes
2answers
76 views

Cryptocurrency acceptance

I heard that the recommended waiting confirmation time for a bitcoin transaction is 6 blocks/ 1 hour. So a shop which lets its customer to pay in bitcoin without any waiting for confirmation would ...
1
vote
1answer
167 views

How to track and handle double-spend attacks?

If a double-spend attack is pulled off, how to manually verify transactions via the bitcoin daemon and how to know how much amount lost? Will the saved transaction hash be re-usable to obtain info ...

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