Questions tagged [stale-block]

A block that is part of an alternative branch in the blockchain and doesn't belong to the longest chain. Stale blocks occur when the blockchain forks, but another competing block at the same height ends up parenting the new longest chain.

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2answers
11k views

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

The orphaned blocks view from BlockChain.info shows a recent fork of the blockchain (starting with block 173,928) that went four blocks long before being orphaned. Other than the controlled rewind ...
34
votes
4answers
57k views

What are orphaned and stale blocks?

If I understand it right, a stale block is a block for which an earlier confirmation has been found and was accepted by majority of people. This block is considered invalid and is later never used. ...
21
votes
4answers
2k 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.
5
votes
0answers
187 views

Obtaining historical orphaned blocks (chaintips) without old node

I'm attempting to do some research surrounding orphaned blocks within the Bitcoin network. From my understanding the best and really only way to obtain data for blocks that no longer exist in the main ...
2
votes
2answers
97 views

Can there be stale blocks in “header first” implementation?

The Bitcoin developer guide mentions stale blocks as not being in the longest chain, then moves on to orphan blocks. It states you don't get orphan blocks, "and if you do" they are just dropped. But ...
1
vote
1answer
535 views

Selfish Mining: stale or orphan?

In terms of a selfish attack many sources speak of orphaned blocks, i.e. blocks that are not on the main chain and thus not paying any coinbase transaction to its miner. Still I'm not sure and ...
4
votes
1answer
155 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
1answer
371 views

Is it possible to use Selfish Mining to steal bitcoins?

Is it possible to use the Selfish Mining algorithm to steal bitcoins?
2
votes
2answers
613 views

Do we put all the transactions in the memory pool?

I wonder if orphan transactions are also stored in the memory pool? If yes, how do the Bitcoin client distinguish between the orphan and non-orphan transactions?