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Topic: We're 30,300 blocks from the reward drop! (Read 7413 times)

legendary
Activity: 2492
Merit: 1473
LEALANA Bitcoin Grim Reaper
July 19, 2012, 12:28:08 AM
#51
Also... 20806 blocks to go!

ah, i remember when my clock still looked like 7:30 Cheesy getting late now.


On this site you should continually calculate an approximate date and time before reward halving. Would be nice to have. Bitcoinwatch.com should have the same so people have a deadline to look at.
hero member
Activity: 812
Merit: 1000

great, thanks guys. my first (sort of) contribution to the bitcoin source code comments.
legendary
Activity: 1904
Merit: 1002
legendary
Activity: 980
Merit: 1008
Let's hope we helped clarify the issue.

Also: https://github.com/bitcoin/bitcoin/pull/1608
hero member
Activity: 812
Merit: 1000
^ Yes... That's exactly what I said. blockexplorer.com has got it wrong.

even though it's only a code-comment and not actual code, that is the kind of statement that can lead newbies to confusion about how things actually work:

 // Subsidy is cut in half every 4 years

should say:

 // Subsidy is cut in half approximately every 4 years

or

 // Subsidy is cut in half every 210000 blocks which will occur approximately every 4 years

Agreed. Though I'm not quite sure how much newbies read source code (or the comments in it). Smiley

well, i'm sure they read them a lot more when they're posted to this forum.
legendary
Activity: 980
Merit: 1008
^ Yes... That's exactly what I said. blockexplorer.com has got it wrong.

even though it's only a code-comment and not actual code, that is the kind of statement that can lead newbies to confusion about how things actually work:

 // Subsidy is cut in half every 4 years

should say:

 // Subsidy is cut in half approximately every 4 years

or

 // Subsidy is cut in half every 210000 blocks which will occur approximately every 4 years

Agreed. Though I'm not quite sure how much newbies read source code (or the comments in it). Smiley
legendary
Activity: 1904
Merit: 1002
Current Block: 169672
Last Block with 50 BTC reward: 209998 https://blockexplorer.com/q/bcperblock/209998
First Block with 25 BTC reward: 209999 https://blockexplorer.com/q/bcperblock/209999

209999-169672=40327 blocks to reward halving.
First block with 25 BTC reward is not 209999, it's 210000.

Code reads:

Code:
int64 static GetBlockValue(int nHeight, int64 nFees)
{
    int64 nSubsidy = 50 * COIN;

    // Subsidy is cut in half every 4 years
    nSubsidy >>= (nHeight / 210000);

    return nSubsidy + nFees;
}

Only 20405 blocks to go now!
First 25 BTC block will probably be mined at: 2012-12-06 21:40:54 (GMT+2)

Last I checked, with integer division 209999/210000 = 0, so 210000 will be the first block with 25 BTC reward.  Height = block number since the first block was number 0.
hero member
Activity: 812
Merit: 1000
Current Block: 169672
Last Block with 50 BTC reward: 209998 https://blockexplorer.com/q/bcperblock/209998
First Block with 25 BTC reward: 209999 https://blockexplorer.com/q/bcperblock/209999

209999-169672=40327 blocks to reward halving.
First block with 25 BTC reward is not 209999, it's 210000.

Code reads:

Code:
int64 static GetBlockValue(int nHeight, int64 nFees)
{
    int64 nSubsidy = 50 * COIN;

    // Subsidy is cut in half every 4 years
    nSubsidy >>= (nHeight / 210000);

    return nSubsidy + nFees;
}

Only 20405 blocks to go now!
First 25 BTC block will probably be mined at: 2012-12-06 21:40:54 (GMT+2)

even though it's only a code-comment and not actual code, that is the kind of statement that can lead newbies to confusion about how things actually work:

 // Subsidy is cut in half every 4 years

should say:

 // Subsidy is cut in half approximately every 4 years

or

 // Subsidy is cut in half every 210000 blocks which will occur approximately every 4 years
legendary
Activity: 980
Merit: 1008
Current Block: 169672
Last Block with 50 BTC reward: 209998 https://blockexplorer.com/q/bcperblock/209998
First Block with 25 BTC reward: 209999 https://blockexplorer.com/q/bcperblock/209999

209999-169672=40327 blocks to reward halving.
First block with 25 BTC reward is not 209999, it's 210000.

Code reads:

Code:
int64 static GetBlockValue(int nHeight, int64 nFees)
{
    int64 nSubsidy = 50 * COIN;

    // Subsidy is cut in half every 4 years
    nSubsidy >>= (nHeight / 210000);

    return nSubsidy + nFees;
}

Only 20405 blocks to go now!
First 25 BTC block will probably be mined at: 2012-12-06 21:40:54 (GMT+2)
legendary
Activity: 2492
Merit: 1473
LEALANA Bitcoin Grim Reaper
Also... 20806 blocks to go!

ah, i remember when my clock still looked like 7:30 Cheesy getting late now.


It's almost midnight Cinderella!
hero member
Activity: 812
Merit: 1000
Also... 20806 blocks to go!

ah, i remember when my clock still looked like 7:30 Cheesy getting late now.
legendary
Activity: 1904
Merit: 1002
I think the price will reflect the reward cut as we have seen with the recent rise to +$8

Im waiting for after the block cut to get a new gaming pc Smiley

I wouldn't be surprised to see quite a bit of selling pressure immediately after the block cut due to this very line of reasoning.

Also... 20806 blocks to go!
hero member
Activity: 686
Merit: 500
Wat
I think the price will reflect the reward cut as we have seen with the recent rise to +$8

Im waiting for after the block cut to get a new gaming pc Smiley
legendary
Activity: 3878
Merit: 1193
Yes you are right, if all 8+ million were on the exchange to be bought. Only like 350k btc is on mtgox.

Your point?

My coins aren't on technically on MtGox, but believe me they will end up there real fast if the price is right. So while you only see 350k on MtGox at this moment, a whole lot more are just waiting for the right price.
hero member
Activity: 609
Merit: 500
I am starting to wonder whether GPU miners will keep going at it or not.

I will mine as long as I am breaking even or better. The exchange rate where I'm not breaking even is silly low. It gets even lower in the winter.  Wink


I will keep mining regardless.  I mined SETI@home and folding@home for "free" before I discovered bitcoins.  Even if I made a penny profit per month, I'd keep mining. Wink
legendary
Activity: 1680
Merit: 1035
I'm expecting network hashrate to start dropping 2-3 weeks before the halving.  Marginal GPU miners will want to balance "mining to the bitter end", with, "beating the rush to sell GPU's on ebay"

We could also see the hashrate ramping up during the last few weeks, as anyone who has any type of mining hardware tries to squeeze out every last bitcoin they can before the reward drops. This could really go in any direction  Tongue
legendary
Activity: 3472
Merit: 1722
price of Bitcoin is based on speculation

FTFY
legendary
Activity: 1736
Merit: 1006

I'm expecting network hashrate to start dropping 2-3 weeks before the halving.  Marginal GPU miners will want to balance "mining to the bitter end", with, "beating the rush to sell GPU's on ebay"  After the halving, you will see an instant drop to 60-70% of pre-halving hashrate as the rest of the marginal miners do the math and figure out they aren't paying the electric bills anymore. 

Sigg

The other interesting question is: where will total hashrate be in 7 months? This chart shows about a 30% increase in mining in three months beginning in December 2011. If price remains stable, (it may rise in anticipation of the block reward halving) the global hashrate could double between now and December if bitcoin keeps making headlines. I think the market will have these events priced in before they arrive.

sr. member
Activity: 381
Merit: 250
$1/BTC that is very low with GPUs. My 2GH box produces 1.25 BTC/day, it costs 850W/1000*24=20.4 kWh*0.069=$1.41/day to run.

But if I add the delivery/transmission/account admin/other costs that my utility co. adds to the bill, it is more like $0.10/kWh so the cost goes to $2.04/day.

So my marginal mining rate (or MMR) is $1.63/BTC

Got to add icarus boards to my setup :-(


Umm.. unless you are mining at a dedicated mining facility, you shouldn't add in the delivery/trans/admin/other costs if they are fixed*.  If you are mining at home, you'd be paying those anyway.  Marginal cost would only be 0.069/kWh.

* If they are not fixed, but variable charges based on kWh usage, then ignore the above. You do, however, need to go down to your electric co and slap around someone for making your bill more confusing Smiley

Sigg

donator
Activity: 1218
Merit: 1079
Gerald Davis
to clarify, I think 60-70% have an electrical cost <50% of their current revenue.  If network hashrate is 10 Thash before halving, I expect it to be 6-7 Thash after halving.

Sigg

DOH.  I read drop "to" as drop "of".
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