A little help with API's please | Bitcointalksearch.org

pooya87

legendary

Activity: 3444

Merit: 10558

Quote from: pornluver on July 14, 2017, 11:57:04 AM

Can anyone tell me why this doesn't work?

https://novaexchange.com/remote/v2/markets/BTC

because that page does NOT exist! in other words novaexchange has not defined anything in that link. remove the /BTC from the end and it will work, giving you all the markets available then in your code loop through the JSON response and put an if for each of them checking to see if the "basecurrency" is equal to "BTC".

also please don't bump old topics to ask a different question Tongue

pornluver

hero member

Activity: 960

Merit: 514

Can anyone tell me why this doesn't work?

https://novaexchange.com/remote/v2/markets/BTC

BitQuark

hero member

Activity: 716

Merit: 501

This is one I have working from coinmarketcap.com API request.

status.php

Code:

$ch = curl_init();
curl_setopt($ch,CURLOPT_URL,'https://api.coinmarketcap.com/v1/ticker/bitquark/');
curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,10);
curl_setopt($ch,CURLOPT_TIMEOUT,10);
curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,false);

$result = curl_exec($ch);
curl_close($ch);
$data = json_decode($result,true);

$name = $data[0]['name'];
$symbol = $data[0]['symbol'];
$rank = number_format($data[0]['rank']);
$priceBTC = number_format($data[0]['price_btc'], 8);
$priceUSD = number_format($data[0]['price_usd'], 4);
$dayVolume = number_format($data[0]['24h_volume_usd'], 2);
$marketCap = number_format($data[0]['market_cap_usd'], 2);
$totalSupply = number_format($data[0]['total_supply'], 2);
$percentChange1Hr = number_format($data[0]['percent_change_1h'], 2);
$percentChange24Hr = number_format($data[0]['percent_change_24h'], 2);
$percentChange7Days = number_format($data[0]['percent_change_7d'], 2);
$lastUpdated = $data[0]['last_updated'];

?>
Name : echo "$name";?>

Symbol : echo "$symbol";?>

Ranking : echo "$rank";?>

Price BTC : echo "$priceBTC";?> BTC

Price USD : $echo "$priceUSD";?> USD

24hr Volume : $echo "$dayVolume";?> USD

Market Cap : $echo "$marketCap";?> USD

Total Supply : echo "$totalSupply";?> BTQ

Percent Change 1hr : echo "$percentChange1Hr";?> %

Percent Change 24hr : echo "$percentChange24Hr";?> %

Percent Change 7 Days: echo "$percentChange7Days";?> %

Last Updated : echo date('r', $lastUpdated);?>

nemgun

hero member

Activity: 882

Merit: 533

Quote from: freemanjackal on February 27, 2017, 09:10:09 PM

i guess you are learning php programming, you should learn to differ array from object and how to access them, php doc will be very usefull, you should have it on hand

Yes, but it is easy to have detailled informations about the variables we use, var_dump(expression) is made for that, it gives the whole structure of the expression (can be a variable, but can be something else) with the type of each compenent, i use to debug using it.
So if you put var_dump each time you have a problem with a variable, you will know if it is an array, object, string, bool ...
Then you can easily walk into it. The previous example was to help you figure out how many types of variables you are crossing, but the class i sent you will directly return the required data.

freemanjackal

sr. member

Activity: 378

Merit: 250

i guess you are learning php programming, you should learn to differ array from object and how to access them, php doc will be very usefull, you should have it on hand

nemgun

hero member

Activity: 882

Merit: 533

You should create classes like here: https://github.com/nemgun32/Exchange-API-Tutorial
And use them to query the prices, then you can easily querry annother API as the first one is contained inside the object.
Use the nova library, you will get all the informations you need, except private API.

In your case it is :

Code:

include('nova.php');

// First init the class
$nova = new nova();

//Now select the pairs you want
$pair = array('BTC_XRBC', 'BTC_POSIV');
$info = $nova->getTickerData($pair);

var_dump($info); //you will have an idea of the data there

// Table now
echo '';
foreach ($info[0][0] as $key => $value) {
echo '';
}
echo '';

// Note that it is possible to change the returned responce from getTickerData to form a nice Array with clear data, but it is not the aim of the repo
for ($i=0; $i < count($info) ; $i++) {
echo '';
for ($e=0; $e < count($info[$i]); $e++) {
foreach ($info[$i][$e] as $key => $value) {
echo '';
}
}
echo '';
}
echo '

'. $key . '
' . $value . '

';

?>

crunck

legendary

Activity: 1176

Merit: 1005

crunck

Ok here goes again, I'm pushing my luck now i know, but is this possible ?

Can I multiply an api out put by another api out put ?

it may be easier to show you:

If you look here http://www.posinvestment.com you will see that my deamon tells me i have 500 Swing coins and the exchange tells me they are 0.00005001BTC each.

Is it possible to multiply the 500 by 0.00005001 to give me a total value of holdings ?

Again thanks for any advice given.

Crunck

EDIT

Also I see I cant have two instances of calling api's from the same src even though the coins are different

Example:

Code:







// Set the JSON header
header("Content-type: text");

//Create a function to make things easyer
function getPrice($url){
	$decode = file_get_contents($url);
	return json_decode($decode, true);
}

// $y is the request URL
$y = getPrice('https://novaexchange.com/remote/v2/market/info/BTC_XRBC/');

// $z is the first array
$z = $y['markets']; 

//$p is the object in $z array
$p = $z[0]['bid'];


echo ($p);
?> BTC


// Set the JSON header
header("Content-type: text");

//Create a function to make things easyer
function getPrice($url){
	$decode = file_get_contents($url);
	return json_decode($decode, true);
}

// $y is the request URL
$y = getPrice('https://novaexchange.com/remote/v2/market/info/BTC_POSIV/');

// $z is the first array
$z = $y['markets']; 

//$p is the object in $z array
$p = $z[0]['bid'];


echo ($p);
?> BTC

nemgun

hero member

Activity: 882

Merit: 533

Quote from: crunck on February 01, 2017, 03:50:36 PM

Thank you both so i nearly have it correct now using this:

Code:

// Set the JSON header
header("Content-type: text/json");

//Create a function to make things easyer
function getPrice($url){
	$decode = file_get_contents($url);
	return json_decode($decode, true);
}

// $y is the request URL
$y = getPrice('https://novaexchange.com/remote/v2/market/info/BTC_AUR/');

// $z is the first array
$z = $y['markets']; 

//$p is the object in $z array
$p = $z[0]['bid'];


echo json_encode($p);
?>

It is now delivering the correct part, but it has inverted comma's wrapped around it - output with above code is :

Code:

"0.00009608"

I cant believe how confusing this is, but i'm learning

Crunck

change : echo json_encode($p); // this line says echo $p in json format
to : echo $p; // this line says echo $p in plain format

This is just one of the several ways to do it, you can play by mixing both my code and your code, but why don't you do it using javascript ? it may be better if you want to use back these infos in the page for display and dynamics.

crunck

legendary

Activity: 1176

Merit: 1005

crunck

Well I cant get Nova working correctly but I will keep trying

And for those that have helped this is what I have been upto http://megahash.co.uk/price

And a huge thanks for the help received its been appreciated and I have learnt a lot.

Crunck

crunck

legendary

Activity: 1176

Merit: 1005

crunck

Thank you both so i nearly have it correct now using this:

Code:

// Set the JSON header
header("Content-type: text/json");

//Create a function to make things easyer
function getPrice($url){
	$decode = file_get_contents($url);
	return json_decode($decode, true);
}

// $y is the request URL
$y = getPrice('https://novaexchange.com/remote/v2/market/info/BTC_AUR/');

// $z is the first array
$z = $y['markets']; 

//$p is the object in $z array
$p = $z[0]['bid'];


echo json_encode($p);
?>

It is now delivering the correct part, but it has inverted comma's wrapped around it - output with above code is :

Code:

"0.00009608"

I cant believe how confusing this is, but i'm learning

Crunck

nemgun

hero member

Activity: 882

Merit: 533

Code:

// Set the JSON header
header("Content-type: text/json");

//Create a function to make things easyer
function getPrice($url){
	$decode = file_get_contents($url);
	return json_decode($decode, true);
}

// $y is the request URL
$y = getPrice('https://novaexchange.com/remote/v2/market/info/BTC_AUR/');

// $z is the first array
$z = $y['markets']; 

//$p is the object in $z array
$p = $z[0]['last_price'];

echo json_encode($z);
echo json_encode($p);
?>

It works like a charm for me

Now for your code :

Code:

printf("%0.8f", $obj->markets[0]->bid);

i guess you should split it in several parts as "->" is for objects, and you require and array in the middle of an object.

first get the object then access market
second access to market array
third walk inside

sotisoti

hero member

Activity: 762

Merit: 500

http://stackoverflow.com/questions/30680938/how-can-i-access-an-array-object

This page gets most upvotes and I heartily suggest having a look at it.

crunck

legendary

Activity: 1176

Merit: 1005

crunck

Quote from: sotisoti on February 01, 2017, 11:38:03 AM

Quote from: crunck on February 01, 2017, 11:03:16 AM

AM i on the right lines and how do i get around it ?

That's because novaexchange uses array in its market element so you have to access the first index (markets[0]) like the following:

Code:

echo"";
print_r($obj);
echo"
";
printf("%0.8f", $obj->markets[0]->bid);

Check out the values returned by print_r and you will understand more.

Ok so i get print_r makes it readable to us mere mortals, but i dont get the >markets[0]-> where is the

Code:

[0]

coming from

I have played around with it it using http://php.net/manual/en/function.print-r.php and similar for reference but cant get it to budge from its 0.0000000 output Sad

serversmc

newbie

Activity: 1

Merit: 0

I'm not sure if you are going to run into problems with it but when trying to find then answer that was already given there api was redirecting which breaks your php because it doesn't follow redirects consider adding something like.

Code:

curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);

sotisoti

hero member

Activity: 762

Merit: 500

Quote from: crunck on February 01, 2017, 11:03:16 AM

AM i on the right lines and how do i get around it ?

That's because novaexchange uses array in its market element so you have to access the first index (markets[0]) like the following:

Code:

echo"";
print_r($obj);
echo"
";
printf("%0.8f", $obj->markets[0]->bid);

Check out the values returned by print_r and you will understand more.

crunck

legendary

Activity: 1176

Merit: 1005

crunck

Back again looking for the genius that is "sotisoti"

I am having issues with Nova API

The url is https://novaexchange.com/remote/v2/market/info/BTC_AUR/

and outputs as :

Code:

{"status": "success", "message": "Info for market: BTC_AUR", "markets": [{"bid": "0.00009608", "last_price": "0.00009528", "volume24h": "0.000", "marketid": 40, "currency": "AUR", "marketname": "BTC_AUR", "ask": "0.00013201", "low24h": "0.00009528", "change24h": "0.0", "high24h": "0.00009528", "basecurrency": "BTC"}]}

So there for my code looks like this:

Code:

$ch = curl_init();
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_URL, 'https://novaexchange.com/remote/v2/market/info/BTC_AUR');
$result = curl_exec($ch);
curl_close($ch);

$obj = json_decode($result);

/*
echo"";
print_r ($obj);
echo"
";
*/


$bid = sprintf("%0.8f", $obj->markets->bid);
echo $bid;

?>

But it returns an output of "0.00000000"

I think it has something to do with this : (in red)

{"status": "success", "message": "Info for market: BTC_AUR", "markets": [{"bid": "0.00009608",

As I have not seen this before.

AM i on the right lines and how do i get around it ?

Many Thanks again

Crunck

crunck

legendary

Activity: 1176

Merit: 1005

crunck

Quote from: sotisoti on January 31, 2017, 07:39:42 PM

Code:

$avg = sprintf("%0.8f", $obj->swing_btc->avg);
echo $avg;

http://php.net/manual/en/function.sprintf.php

Your a star - Many Thanks

You will be please to know i figured out the cryptopia and nova API thanks to a mixture of your above help

I will be sure to share what I am upto with you once i am a little further down the line with the website

Thanks for the time you have spent here with me:)

Crunck

sotisoti

hero member

Activity: 762

Merit: 500

Code:

$avg = sprintf("%0.8f", $obj->swing_btc->avg);
echo $avg;

http://php.net/manual/en/function.sprintf.php

crunck

legendary

Activity: 1176

Merit: 1005

crunck

Quote from: sotisoti on January 31, 2017, 12:38:06 PM

Quote from: crunck on January 31, 2017, 12:07:14 PM

What is the difference between this out put https://yobit.net/api/3/ticker/swing_btc and the trex one ?

Code:

{"swing_btc":{"high":0.0000585,"low":0.00004717,"avg":0.00005283,"vol":0.17922473,"vol_cur":3646.92318916,"last":0.00004717,"buy":0.00004717,"sell":0.00005800,"updated":1485880252}}

swing_btc is a JSON key so you'd need it to access the property.

Code:

echo $obj->swing_btc->high;

Again many thanks for spending time answering my questions its appreciated, I have it working sort of but it displays wrong Sad

http://megahash.co.uk/test1.php

Instead of a normal price it is showing "5.85E-5"

Guess I need to stick to html lol

sotisoti

hero member

Activity: 762

Merit: 500

Quote from: crunck on January 31, 2017, 12:07:14 PM

What is the difference between this out put https://yobit.net/api/3/ticker/swing_btc and the trex one ?

Code:

{"swing_btc":{"high":0.0000585,"low":0.00004717,"avg":0.00005283,"vol":0.17922473,"vol_cur":3646.92318916,"last":0.00004717,"buy":0.00004717,"sell":0.00005800,"updated":1485880252}}

swing_btc is a JSON key so you'd need it to access the property.

Code:

echo $obj->swing_btc->high;

Topic: A little help with API's please (Read 2694 times)