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.

learn more… | top users | synonyms

2
votes
2answers
29 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 ...
0
votes
0answers
30 views

Block mining and confirming correct resolve by network

I have a question about the validation of a correctly solved block by the network. How long could it take to confirm and what doest that look like? In which cases can the network reject my solved ...
1
vote
1answer
88 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 ...
1
vote
1answer
191 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
1answer
180 views

Orphaned blocks on September 13, 2014

I'm new in the Bitcoin World. Today I did my second transaction for just 0.005 BTC but 2 hours after, it's unconfirmed yet. The transaction is in the block 320385 and it is orphaned. I saw the ...
3
votes
3answers
170 views

How is over-spending one block apart prevented?

So, let's say you have a wallet with 20BTC, and you have a flow like so: You send 15BTC to A in block 1 You send 15BTC to B in block 2 What happens if at block 1 there are two chains across miners....
33
votes
2answers
4k 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 ...
17
votes
3answers
757 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.