Dear @bitpay. This week I started setting up my own @BtcpayServer. When I discovered how easy it is, I contacted five vendors and clients I know who currently use your services. They’re going to pay me to help them leave you. I’m sure my story isn’t unique. You are ending now.

Dear @bitpay. This week I started setting up my own @BtcpayServer. When I discovered how easy it is, I contacted five vendors and clients I know who currently use your services. They're going to pay me to help them leave you. I'm sure my story isn't unique. You are ending now. submitted by /u/TheGreatMuffin
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Bitcoin – The Currency of the Internet

My girlfriend and I spent the last 3 months creating a unique crypto portfolio app – one tap trade imports, historical tracking, event triggers, etc. Can we have some feedback?

We posted a while back to this sub looking for beta testers, and we've finally finished fixing most of the bugs and implemented a couple of new stuff. Thank you to all who beta tested and your valuable feedback!!

Here's a quick gif on imgur: https://imgur.com/a/8y4t6

It has a minimalist UI, and if you trade a lot, you can import your trades directly from an exchange with your read-only API and it'll automatically calculate your average buy-ins/profits/price bought at that time, etc. Currently has ATH and price triggers but more coming.

It's only available on Play Store now, but our iOS version will be out in 2 weeks. No ads. Link to play store: https://play.google.com/store/apps/details?id=com.trontal.alwaysahead&hl=en

We would highly appreciate it if you have any feedback for us, constantly looking to improve!

submitted by /u/sandspiper
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Bitcoin – The Currency of the Internet

How to put QR Code whenever I generate a unique address? block.io API

Hi guys as the title says. how can I generate a QR code whenever the block_io.php generates a unique address? I seem to have a problem when calling $ newAddressInfo or $ newAddressInfo->data->address whenever I’m echo-ing it. Please disregard the missing characters as per it’s perfectly working. so this is the whole script.

Bitcoin Address validator from Kyle : HIS YOUTUBE CHANNEL
QR GENERATOR FROM : TERRAGON

I just tweaked kyle’s script.

SCRIPT :

require_once ("block_io.php");   $  apiKey = "myAPIkey"; <br> $  version = 2; // API version <br> $  pin = "myPin";<br> $  block_io = new BlockIo($  apiKey, $  pin, $  version);<br>  if(isset($  _POST['submit'])){     $  newAddressInfo = $  block_io->get_new_address();     $  address = $  _POST['addr'];     $  decoded = decodeBase58($  address);      $  d1 = hash("sha256", substr($  decoded,0,21), true);     $  d2 = hash("sha256", $  d1, true);      if(substr_compare($  decoded, $  d2, 21, 4)){         $  message = "Invalid Bitcoin Address";     } else {         $  message1 = "Valid Address";         $  message2 = "Your Receiving Address : ";     } }   function decodeBase58($  input) {     $  alphabet = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz";      $  out = array_fill(0, 25, 0);     for($  i=0;$  i<strlen($  input);$  i++){         if(($  p=strpos($  alphabet, $  input[$  i]))===false){                 throw new \Exception("invalid character found");         }         $  c = $  p;         for ($  j = 25; $  j--; ) {                 $  c += (int)(58 * $  out[$  j]);                 $  out[$  j] = (int)($  c % 256);                 $  c /= 256;                 $  c = (int)$  c;         }         if($  c != 0){             throw new \Exception("address too long");         }     }      $  result = "";     foreach($  out as $  val){             $  result .= chr($  val);     }      return $  result; }  </form method="post">     <input style="width: 100%;" name="addr" type="text"> <center><input name="submit" type="submit"><br>   if (isset($  message)){ echo $  message; } <br>  if (isset($  message2)){ echo " Your Unique Deposit Address: " .$  newAddressInfo->data->address."<br>"; } <br>  if (isset($  message2)) $  str = "Your Receiving Address : ";  $  str ; echo $  address = $  _POST['addr']; <br>  if (isset($  message2)){ echo img src='qr/qr_img.php?d=$  newAddressInfo->data->address'> ; } <br>   </form> 

Recent Questions – Bitcoin Stack Exchange

ART for Bitcoins original unique peaces on canvas (reddit.com)

hi guys im an proffesional artist form canada,i do stuff in the street art world ,graffitis and abstract paintings , i start to sell my art in this famous online gallery ,named saatchi but im also a big supporter of the bitcoin comunity and i was telling my self that it would be great idea to sell it via bitcoin because i opend myself to a world of possibilitis , there it is so guys if you like any f my work just inbox me and we gonna figur that out , all the prices are negociables ,so there…

Bitcoin

Is the generated Public Key from Private Key Unique in Bitcoin?

I am generating public key from my private key. I did in Java script and C#. but generated public keys are different. My Code in c# (KeyCore.NET):

PrivateKey pv = new PrivateKey(Globals.ProdDumpKeyVersion, "KwY7eRvXXFd7HPX4Zuv8STZMLsVSe2X22HkU24Av84W1Cb7Rd5Yh"); PublicKey pb = pv.PublicKey; Console.WriteLine(pb.ToString()); 

result for C# code is 16w4zZWjWnhfEasJcSbfDQeHJRk1LytPHF5ir1ZS9mtUD5adsdH and the result for javascript code is 16reZXagkyToongduimD25SEerXwP3MQ4n

I used KeyCore.NET and bitaddress

Recent Questions – Bitcoin Stack Exchange

How can the number of unique addresses decline?

Blockchain.info has various charts over time, including one for “unique addresses”. They do not explain what it means, but presumably it is the number of unique addresses that appear in all transactions in the blockchain.

If this is true, then I would expect the number of unique addresses to keep going up indefinitely. How could the number of unique address decline?

Recent Questions – Bitcoin Stack Exchange