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Topic: [API] Difficulty needed. (Read 1328 times)

scintill

sr. member

Activity: 448

Merit: 254

Quote from: payb.tc on January 17, 2012, 12:12:48 AM

Quote from: simon66 on January 17, 2012, 12:09:10 AM

looking here he got bitcoind, namecoind, and devcoind.

It's installed on /var/www/files/daemons/

I tried

Code:

$difficulty = (float)shell_exec('/var/www/files/daemons/bitcoind getdifficulty');
echo "Difficulty is ", $difficulty, "\n";

and I got "Difficulty 0"

do you know if bitcoind was actually already up and running or did your command launch it?

> ps aux|grep bit

Yeah, check that, and if the chain is synced up. There is a "getblockcount" command that should be close to http://blockexplorer.com/q/getblockcount .

(If the server isn't started "bitcoind -daemon" is how I start it, maybe there are better ways.)

payb.tc

hero member

Activity: 812

Merit: 1000

Quote from: simon66 on January 17, 2012, 12:09:10 AM

looking here he got bitcoind, namecoind, and devcoind.

It's installed on /var/www/files/daemons/

I tried

Code:

$difficulty = (float)shell_exec('/var/www/files/daemons/bitcoind getdifficulty');
echo "Difficulty is ", $difficulty, "\n";

and I got "Difficulty 0"

do you know if bitcoind was actually already up and running or did your command launch it?

> ps aux|grep bit

simon66

sr. member

Activity: 423

Merit: 250

looking here he got bitcoind, namecoind, and devcoind.

It's installed on /var/www/files/daemons/

I tried

Code:

$difficulty = (float)shell_exec('/var/www/files/daemons/bitcoind getdifficulty');
echo "Difficulty is ", $difficulty, "\n";

and I got "Difficulty 0"

scintill

sr. member

Activity: 448

Merit: 254

Quote from: payb.tc on January 16, 2012, 08:16:55 PM

here you go... a bullet-proof php attempt:

Code:

$moo = file_get_contents('http://dot-bit.org/tools/nextDifficulty.php');
$moo = substr($moo, strpos($moo, 'H/s') + 5);
$moo = substr($moo, 0, strpos($moo, '<'));
$diff = str_replace('\'','',$moo);
?>

simon66, this is probably your best bet, in combination with similar pages for the other chains you're interested in.

Quote from: payb.tc on January 16, 2012, 11:31:23 PM

wouldn't that approach also require you to know the full path to bitcoind?

If it is not in the PATH environment variable, you would have to put the full path. Mine is in the PATH, so it works.

payb.tc

hero member

Activity: 812

Merit: 1000

Quote from: scintill on January 16, 2012, 11:26:03 PM

You can check by trying "bitcoind getdifficulty" at the command line and seeing if it works. If it does, the PHP is simple:

Code:

$difficulty = (float)`bitcoind getdifficulty`;
echo "Difficulty is ", $difficulty, "\n";

The "`" symbols are the "backtick operator", but shell_exec() is equivalent. Replacing bitcoind with namecoind, etc., would make it work for all chains, if all the servers are installed and running.

wouldn't that approach also require you to know the full path to bitcoind?

scintill

sr. member

Activity: 448

Merit: 254

Quote from: simon66 on January 16, 2012, 07:52:38 PM

Quote from: scintill on January 16, 2012, 06:22:25 PM

Quote from: simon66 on January 16, 2012, 06:19:29 PM

Quote from: Remember remember the 5th of November on January 16, 2012, 05:57:40 PM

Every ?coind has an RPC command called getdifficulty to fetch current difficulty.

ummm. what? Lol

If you run bitcoind, namecoind, devcoind and keep them synced with the network, it's as easy as

Code:

$ bitcoind getdifficulty
1250757.73927466

at the shell, or via HTTP RPC requests if you set that up.

I'm not so sure if the person I'm helping have that installed, how can I tell and how can I call it via php. Sorry if I'm asking too much.

You can check by trying "bitcoind getdifficulty" at the command line and seeing if it works. If it does, the PHP is simple:

Code:

$difficulty = (float)`bitcoind getdifficulty`;
echo "Difficulty is ", $difficulty, "\n";

The "`" symbols are the "backtick operator", but shell_exec() is equivalent. Replacing bitcoind with namecoind, etc., would make it work for all chains, if all the servers are installed and running.

From the sounds of it installing and maintaining nodes for each chain is more complicated than you want. The APIs at http://blockexplorer.sytes.net/q might meet your needs, but last I looked some of the chains were out of date, and it seems to be down right now. I also couldn't figure out how to use the relevant API call -- it would be something like http://blockexplorer.sytes.net/chain/Bitcoin/q/nethash , but I couldn't figure out how to narrow it to just the current difficulty.

payb.tc

hero member

Activity: 812

Merit: 1000

Quote from: simon66 on January 16, 2012, 08:02:48 PM

Quote from: payb.tc on January 16, 2012, 07:56:27 PM

for nmc, you could try scraping this page:

http://dot-bit.org/tools/nextDifficulty.php

Code:

Namecoin difficulty

I was gonna do that, but there has to be an easier method. I'll wait on the "bitcoind getdifficulty" thingy

here you go... a bullet-proof php attempt:

Code:

$moo = file_get_contents('http://dot-bit.org/tools/nextDifficulty.php');
$moo = substr($moo, strpos($moo, 'H/s') + 5);
$moo = substr($moo, 0, strpos($moo, '<'));
$diff = str_replace('\'','',$moo);
?>

simon66

sr. member

Activity: 423

Merit: 250

Quote from: payb.tc on January 16, 2012, 07:56:27 PM

for nmc, you could try scraping this page:

http://dot-bit.org/tools/nextDifficulty.php

Code:

Namecoin difficulty

	Block	Time	Difficulty	Ratio
Last change	38304	16/01/2012 07:06	516'181.44	x1.04

I was gonna do that, but there has to be an easier method. I'll wait on the "bitcoind getdifficulty" thingy

payb.tc

hero member

Activity: 812

Merit: 1000

for nmc, you could try scraping this page:

http://dot-bit.org/tools/nextDifficulty.php

Code:

Namecoin difficulty

	Block	Time	Difficulty	Ratio
Last change	38304	16/01/2012 07:06	516'181.44	x1.04

simon66

sr. member

Activity: 423

Merit: 250

Quote from: scintill on January 16, 2012, 06:22:25 PM

Quote from: simon66 on January 16, 2012, 06:19:29 PM

Quote from: Remember remember the 5th of November on January 16, 2012, 05:57:40 PM

Every ?coind has an RPC command called getdifficulty to fetch current difficulty.

ummm. what? Lol

If you run bitcoind, namecoind, devcoind and keep them synced with the network, it's as easy as

Code:

$ bitcoind getdifficulty
1250757.73927466

at the shell, or via HTTP RPC requests if you set that up.

I'm not so sure if the person I'm helping have that installed, how can I tell and how can I call it via php. Sorry if I'm asking too much.

scintill

sr. member

Activity: 448

Merit: 254

Quote from: simon66 on January 16, 2012, 06:19:29 PM

Quote from: Remember remember the 5th of November on January 16, 2012, 05:57:40 PM

Every ?coind has an RPC command called getdifficulty to fetch current difficulty.

ummm. what? Lol

If you run bitcoind, namecoind, devcoind and keep them synced with the network, it's as easy as

Code:

$ bitcoind getdifficulty
1250757.73927466

at the shell, or via HTTP RPC requests if you set that up.

notme

legendary

Activity: 1904

Merit: 1002

Quote from: Remember remember the 5th of November on January 16, 2012, 05:57:40 PM

Every ?coind has an RPC command called getdifficulty to fetch current difficulty.

This.

bitcoind getdifficulty
namecoind getdifficulty
dvcoind getdifficulty (guessing on this one)

simon66

sr. member

Activity: 423

Merit: 250

Quote from: Remember remember the 5th of November on January 16, 2012, 05:57:40 PM

Every ?coind has an RPC command called getdifficulty to fetch current difficulty.

ummm. what? Lol

Remember remember the 5th of November

legendary

Activity: 1862

Merit: 1011

Reverse engineer from time to time

Every ?coind has an RPC command called getdifficulty to fetch current difficulty.

simon66

sr. member

Activity: 423

Merit: 250

I'm currently working of a project and I need to know where can I find a reliable difficulty API?

Like I found this one for BTC

http://blockexplorer.com/q/getdifficulty

but I need to get one for NMV and DVC.

Thanks.

PS. I'll keep searching.

Bitcoin Forum>Alternate cryptocurrencies>Altcoin Discussion

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	Block	Time	Difficulty	Ratio
Last change	38304	16/01/2012 07:06	516'181.44	x1.04