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Bitcoin => Development & Technical Discussion => Topic started by: jackg on June 03, 2016, 09:04:48 PM



Title: Is the halving date actually known?
Post by: jackg on June 03, 2016, 09:04:48 PM
Since there are sites like this (http://bitcoinblockhalf.com/).

I thought that the blick halving was unknown but twow sites appear to show the same date and time for the halving which was supposed to be an estimation.

Are these the correct times or just an estimation.

Also, I put this here but am unsure whether it should be in general bitcoin discussion or mining speculation (please advise).


Title: Re: Is the halving date actually known?
Post by: DebitMe on June 03, 2016, 09:08:00 PM
Those are either based on finding a block every 10 minutes (no network growth) or they are using the current difficulty trend somehow to predict the date.  The actual halving will occur when 210,000 blocks have passed since the previous halving (420,000 blocks total).  There is still a few weeks for machines to come online and shorten that time, so it will be around there, but probably not exact as those sites are saying.  We will get a better and better picture of when it will be as we approach the halving.


Title: Re: Is the halving date actually known?
Post by: Holliday on June 03, 2016, 09:12:59 PM
Since there are sites like this (http://bitcoinblockhalf.com/).

I thought that the blick halving was unknown but twow sites appear to show the same date and time for the halving which was supposed to be an estimation.

Are these the correct times or just an estimation.

Also, I put this here but am unsure whether it should be in general bitcoin discussion or mining speculation (please advise).

The rate at which blocks are found varies according to how much hashing power is thrown at the network. More hashing power means faster blocks while less hashing power means slower blocks. Every 2016 blocks the network adjusts the difficulty in an attempt to achieve 10 minute blocks on average.

Those times are estimations, but as we get closer to the actual halving block, those estimations should get better.

I would probably move the thread to Beginners and Help, but it certainly doesn't belong in Dev and Tech Discussion.


Title: Re: Is the halving date actually known?
Post by: jackg on June 03, 2016, 10:21:41 PM
Since there are sites like this (http://bitcoinblockhalf.com/).

I thought that the blick halving was unknown but twow sites appear to show the same date and time for the halving which was supposed to be an estimation.

Are these the correct times or just an estimation.

Also, I put this here but am unsure whether it should be in general bitcoin discussion or mining speculation (please advise).

The rate at which blocks are found varies according to how much hashing power is thrown at the network. More hashing power means faster blocks while less hashing power means slower blocks. Every 2016 blocks the network adjusts the difficulty in an attempt to achieve 10 minute blocks on average.

Those times are estimations, but as we get closer to the actual halving block, those estimations should get better.

I would probably move the thread to Beginners and Help, but it certainly doesn't belong in Dev and Tech Discussion.

Mining difficulty has slightly decreased, based on my informal figures from Hashnest.com.
This means that the halving could be later? But it should be around that date anyway.


Title: Re: Is the halving date actually known?
Post by: bones261 on June 04, 2016, 01:06:50 AM
Since there are sites like this (http://bitcoinblockhalf.com/).

I thought that the blick halving was unknown but twow sites appear to show the same date and time for the halving which was supposed to be an estimation.

Are these the correct times or just an estimation.

Also, I put this here but am unsure whether it should be in general bitcoin discussion or mining speculation (please advise).

The rate at which blocks are found varies according to how much hashing power is thrown at the network. More hashing power means faster blocks while less hashing power means slower blocks. Every 2016 blocks the network adjusts the difficulty in an attempt to achieve 10 minute blocks on average.

Those times are estimations, but as we get closer to the actual halving block, those estimations should get better.

I would probably move the thread to Beginners and Help, but it certainly doesn't belong in Dev and Tech Discussion.

Mining difficulty has slightly decreased, based on my informal figures from Hashnest.com.
This means that the halving could be later? But it should be around that date anyway.

The mining difficulty went up 2.60% last time according bitcoinwisdom. (https://bitcoinwisdom.com/bitcoin/difficulty) However, it appears the hash has gone down since then. This is counterintuitive since the worth of BTC has increased significantly, lately. I am pretty certain that the big Chinese mining farms are manipulating both the difficulty and the price of Bitcoin, as usual.


Title: Re: Is the halving date actually known?
Post by: StoreBit on June 04, 2016, 02:33:30 PM
people are expecting dfferent dates but I think no it s fixed date not known. no one know the actual date of havlving.


Title: Re: Is the halving date actually known?
Post by: Daimaru on June 04, 2016, 02:37:36 PM
i think it's true the date is
 Reward-Drop ETA date: 11 Jul 2016 00:37:07


Title: Re: Is the halving date actually known?
Post by: cr1776 on June 04, 2016, 02:40:19 PM
i think it's true the date is
 Reward-Drop ETA date: 11 Jul 2016 00:37:07

The only thing known is the block number. Everything else is an estimate which should be pretty accurate.


Title: Re: Is the halving date actually known?
Post by: bob123 on June 07, 2016, 11:42:28 AM
Like already mentioned halving happens every 210.000 Blocks (which is roughly 2 years considered that 1 block is mined every 10 mins in average).

Does anyone know wheter reward is going to be halved on block 420.000 or first halved reward at block 420.001 ?


Title: Re: Is the halving date actually known?
Post by: cr1776 on June 07, 2016, 11:44:41 AM
Like already mentioned halving happens every 210.000 Blocks (which is roughly 2 years considered that 1 block is mined every 10 mins in average).

Does anyone know wheter reward is going to be halved on block 420.000 or first halved reward at block 420.001 ?

It is actually roughly every 4 years, although this period has been about 3.5 years.  :-)

This has the schedule, showing which block it is:
https://en.bitcoin.it/wiki/Controlled_supply


Title: Re: Is the halving date actually known?
Post by: jackg on June 07, 2016, 06:32:11 PM
Does anyone know wheter reward is going to be halved on block 420.000 or first halved reward at block 420.001 ?
WHy would you want to know this?
Threr are block sent every 10 minutes so this will not cause a great problem as to which it is.

i think it's true the date is
 Reward-Drop ETA date: 11 Jul 2016 00:37:07

The only thing known is the block number. Everything else is an estimate which should be pretty accurate.

That is a VERY exact estimate that they came up with!


Title: Re: Is the halving date actually known?
Post by: mezzomix on June 08, 2016, 07:52:13 AM
Does anyone know wheter reward is going to be halved on block 420.000 or first halved reward at block 420.001 ?

420000

Code:
CAmount GetBlockSubsidy(int nHeight, const Consensus::Params& consensusParams)
{
    int halvings = nHeight / consensusParams.nSubsidyHalvingInterval;
    // Force block reward to zero when right shift is undefined.
    if (halvings >= 64)
        return 0;

    CAmount nSubsidy = 50 * COIN;
    // Subsidy is cut in half every 210,000 blocks which will occur approximately every 4 years.
    nSubsidy >>= halvings;
    return nSubsidy;
}