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Questions tagged [height]

The height of a block is the the number of blocks between it and the genesis block.

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1answer
116 views

Why there is no block index or block height included in the block header?

Why block index or block height is not included in the block header? Do we have to go through the whole chain if we want to know how many blocks are there in a chain? On the other hand, if some blocks ...
0
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1answer
117 views

get utxo at a certain chain height

I have the reference client running with a complete transaction index. Is it possible to get all UTXO for a certain height of the chain either via bitcoin-cli or some other tool?
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1answer
77 views

Was the 51% attack a real threat in the early days of bitcoin existence?

The hypothesis of 51% attack is based on a malicious entity is able to control more than 50% hashrate of all mining nodes. It's understandable that there's huge amount of mining power existing ...
4
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1answer
376 views

How can I forecast the date Bitcoin will hit a certain blockheight?

How can I forecast the date Bitcoin will hit a certain blockheight? Are estimates for future halving and other important blockheights just based on the current height plus 1 for each 10 minute period ...
1
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1answer
91 views

Height mismatch between bitcoin-qt and bitcoin explorers

I am running bitcoin-qt on the testnet. The count of the last block is 787794 which is way ahead of what I see on blockchain explorers such as https://test.webbtc.com/, which shows the last block as ...
7
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3answers
13k views

How many blocks are there in blockchain as of today?

I have currently downloaded 300,000 blocks and the last one is generated 1 year and 19 weeks ago. I wonder how many blocks are more to go, before I am up to date.
2
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1answer
291 views

How can one extract an address balance at a specific height?

Is it possible to view the balance of an address at a specific height, without using any external web api? Could it perhaps be done using bx or the Bitcoin client API?
4
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2answers
250 views

Is there a special name for the block currently at the head of the chain?

Just as we have the genesis block which is block 0, is there a special name for the block currently at the head of the chain? Obviously such a block would be observer dependent and never absolute but ...
4
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1answer
285 views

How to determine custom synchronization status?

Context: I'm working on an application in which we'd like to know if the current node is sufficiently synced to be able to handle RPC requests. The method we would like to use is to see if our node ...
3
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1answer
336 views

Namecoin - How to Find Block Height via Block Hash?

Is it possible to use namecoind to determine the block number from a block hash? Going from height to hash is easy: namecoind getblockhash But going from hash to height appears to be impossible... ...
3
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2answers
2k views

Is block height always sequential?

Is block height always sequential? Can it serve as a 100% reliable block counter in case if I want to check whether I missed a block or I need to account for any corner cases?
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1answer
10k views

Definition of blockchain height

What is the definition of blockchain height and how is it found/calculated. I get the idea it is related to the SO answer by Gary Rowe, but the word "height" is not mentioned. Yet I see references to ...
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2answers
1k views

How do I get testnet block height?

Like I would do wget -O - http://blockchain.info/q/getblockcount 2>/dev/null for the main net.