Bitcoin Forum

Bitcoin => Project Development => Topic started by: bitfreak! on January 06, 2012, 08:58:01 AM

Title: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: bitfreak! on January 06, 2012, 08:58:01 AM

http://bitfreak.info/pics/bitsci_screen.jpg

This is a little project I've been working on for the last few days. I first came up with this idea here: PHP script to create private key & public address (https://bitcointalk.org/index.php?topic=55233.0). It was hard to find a decent Elliptic Curve library for PHP but eventually I came across this on a blog: Elliptic Curve PHP-OOP DSA and Diffie-Hellman (http://matejdanter.com/2010/12/elliptic-curve-php-oop-dsa-and-diffie-hellman/). The library only came with a set of NIST curves so I had to create a set of SEC curves using the parameters supplied in sec2_final.pdf (http://www.secg.org/collateral/sec2_final.pdf).

Then to convert the keys into bitcoin addresses I basically followed the instructions on this page: Technical background of version 1 Bitcoin addresses (https://en.bitcoin.it/wiki/Technical_background_of_Bitcoin_addresses). I found that many of these steps had already been coded in PHP: bitcoin-php - Bitcoin utility functions (https://github.com/mikegogulski/bitcoin-php/blob/master/src/bitcoin.inc). I did a lot of testing with it and it seems to generate valid bitcoin addresses each time, I even sent coins to one of the addresses generated in PHP and it worked fine. However, I am far from an expert on cryptography so please check the code and let me know if you see any problems.

If you have time, take a look at the bitcoin.lib.php file and check the following functions for problems. The mini key functions aren't really used for anything at this point, I just coded them because it seemed like a good idea at the time.

getNewPrivKey()
getNewKeyPair()
getNewKeySet()
privKeyToAddress($privKey)
privKeyToWIF($privKey)
checkMiniKey($miniKey)
getNewMiniKey()
miniKeyToWIF($miniKey)
miniKeyToAddress($miniKey)

The other part of this script is the Bitcoin Payment Gateway. Instead of passing the transaction through to a 3rd party for processing, payments are verified simply by using blockexplorer to monitor the status of a payment to a specified address. There's no need to install bitcoind on your server, everything is done in pure PHP. This script essentially enables you to have your own Payment Notification System without the need for a middleman (except blockchain.info/blockexplorer.com), very safe imo, and another amazing feature of bitcoin. This is the description from my website:

Quote

The Bitcoin Shopping Cart Interface package is a set of libraries and tools that enable you to process bitcoin transactions with only PHP. You can have your own Instant Payment Notification system without the need for a middleman. If you've been wondering how to handle customer payment since MyBitcoin went down, look no further, because this is the safest solution.

An elliptic curve library written in PHP is used to achieve server side generation of FRESH bitcoin addresses for each customer. The script monitors the status of a payment by making use of the data supplied by blockexplorer.com. As such, there is no need to install a heavy duty service such as bitcoind on your server. The only limitation with this PHP package is that you can't make outgoing payments.

The SCI package comes with a simple example to give you an idea about how to generate new keys and initiate a new payment through the Bitcoin Payment Gateway. This is NOT full shopping cart software, you would typically use this script to offer Bitcoins as one method of payment. Some of the Bitcoin SCI scripts (in the 'sci' folder) need to be modified to work properly on your website.

Info: Bitcoin SCI: process bitcoin transactions with PHP (http://bitfreak.info/index.php?page=tools&t=bitsci)

Download: Bitcoin SCI (http://bitfreak.info/files/Bitcoin_SCI.7z)

Demo: BitShop Integration (http://bitfreak.info/bitshop/)

Title: Re: Bitcoin SCI: process bitcoin transactions with PHP (address generation & IPN)
Post by: HostFat on January 06, 2012, 09:21:14 AM

Great! :D
Do you think that it should be easy to add also the support to blockchain.info API ?

Title: Re: Bitcoin SCI: process bitcoin transactions with PHP (address generation & IPN)
Post by: bitfreak! on January 06, 2012, 09:24:49 AM

Quote from: HostFat on January 06, 2012, 09:21:14 AM

Great! :D
Do you think that it should be easy to add also the support to blockchain.info API ?

Yah it should be simple. Go ahead and do what you like with it.

Title: Re: Bitcoin SCI: process bitcoin transactions with PHP (address generation & IPN)
Post by: slush on January 06, 2012, 10:25:21 AM

Don't forget that blockexplorer is technically run by private party and it's closed source. Support for alternative sites would be important for the safety.

I'm looking exactly to this (handling keys in PHP) for writing PHP client for my Stratum project (https://bitcointalk.org/index.php?topic=55842.0). Maybe you would be interested in writing API for it? It has basically JSON-RPC interface, with some significant benefits over using blockexplorer.

Main benefit is that you can actively subscribe for watching some Bitcoin address and Stratum server will push you notification to given URL when something change, in realtime. With this feature, there's no need for extra buttons like "confirm payment", website can detect incoming transaction by self, providing excellent user experience: Webpage with displayed bitcoin address will have open ajax connection to the website, when website receive notification about new transaction to this particular address, it send that transaction back to webpage over the ajax connection. No polling, no extra buttons, seamless integration...

This is still under development (I'm implementing blockchain handling right now), but will be ready in few days. However one Stratum server is already online, so writing client side is already possible.

Title: Re: Bitcoin SCI: process bitcoin transactions with PHP (address generation & IPN)
Post by: bitfreak! on January 06, 2012, 10:56:24 AM

Quote

Don't forget that blockexplorer is technically run by private party and it's closed source. Support for alternative sites would be important for the safety.

Good point. I'll get around to it when I have more time. Can you recommend some alternative sites?

Quote

I'm looking exactly to this (handling keys in PHP) for writing PHP client for my Stratum project (https://bitcointalk.org/index.php?topic=55842.0). Maybe you would be interested in writing API for it? It has basically JSON-RPC interface, with some significant benefits over using blockexplorer.

That seems like it would be way over my head. Even if I could, I don't really have time to help out. Sorry about that. Seems like a very interesting project though.

Quote

With this feature, there's no need for extra buttons like "confirm payment", website can detect incoming transaction by self, providing excellent user experience: Webpage with displayed bitcoin address will have open ajax connection to the website, when website receive notification about new transaction to this particular address, it send that transaction back to webpage over the ajax connection.

Well I was thinking about using AJAX, but I decided not to use any javascript at all so it would be more reliable. With AJAX I could have sent queries to blockexplorer in the background and automated everything. Even if I were to use AJAX, it would be rather pointless to send queries to blockexplorer when the user hasn't even sent the bitcoins; although you could automate it that way. The 'confirm' button simply tells the script that it can start looking for confirmations once the user has sent the payment. It's only one extra button they have to click anyway, and I think it helps to have it there with the cancel button before the confirmation stage.

Title: Re: Bitcoin SCI: process bitcoin transactions with PHP (address generation & IPN)
Post by: slush on January 06, 2012, 12:18:26 PM

Quote from: bitfreak! on January 06, 2012, 10:56:24 AM

Good point. I'll get around to it when I have more time. Can you recommend some alternative sites?

Yes, I hope that Stratum will be reasonable choice in few days :-).

Quote

That seems like it would be way over my head.

Come on, it's not so hard as it looks from reading "formal specification". This is full example of subscribing events (incoming transactions) for any given Bitcoin address (callback will expire in X-Session-Timeout second, whill will be presented in HTTP response, but can be prolonged by another call):

Code:

POST / HTTP/1.1
Host: stratum.bitcoin.cz
Connection: close
Content-Type: application/stratum
Content-Length: 81
X-Callback-Url: http://yourdomain.com/callback.php

{"id": 1, "method": "blockchain.address.subscribe", "params": ["1YourAddress"]}

(Note: there must be newline ("\n") on the end of every JSON command).

Expected response:

Code:

HTTP/1.1 200 OK
Content-Length: 36
X-Session-Timeout: 3600
Server: Stratum/0.1
X-Content-Sha256: fe2a156e058307b4b7782e0b236cbd631c5bce3091f8800f818c91fcb850bfc3
Connection: close
Date: Fri, 06 Jan 2012 12:36:17 GMT
Content-MD5: b0d24c6c203d57e8a998be226a16a3c1
Content-Type: application/stratum
Set-Cookie: STRATUM_SESSION=e6ad15c26f0fe711ba632a7978a3ab30; Path=/

{"error":null,"id":1,"result":true}

After this call, URL http://yourdomain.com/callback.php will be called everytime there will be some event on 1YourAddress.

Doesn't look so difficult, does it? ;-)

EDIT: Added example of response.

Title: Re: Bitcoin SCI: process bitcoin transactions with PHP (address generation & IPN)
Post by: mcorlett on January 06, 2012, 12:42:54 PM

Quote from: slush on January 06, 2012, 12:18:26 PM

Quote from: bitfreak! on January 06, 2012, 10:56:24 AM

Good point. I'll get around to it when I have more time. Can you recommend some alternative sites?

Yes, I hope that Stratum will be reasonable choice in few days :-).

Quote

That seems like it would be way over my head.

Code:

POST / HTTP/1.1
Host: stratum.bitcoin.cz
Connection: close
Content-Type: application/stratum
Content-Length: 81
X-Callback-Url: http://yourdomain.com/callback.php

{"id": 1, "method": "blockchain.address.subscribe", "params": ["1YourAddress"]}

(Note: there must be newline ("\n") on the end of every JSON command).

After this call, URL http://yourdomain.com/callback.php will be called everytime there will be some event on 1YourAddress.

Doesn't look so difficult, does it? ;-)

What parameters are sent together with the callback and in what form?

Title: Re: Bitcoin SCI: process bitcoin transactions with PHP (address generation & IPN)
Post by: slush on January 06, 2012, 12:49:35 PM

Quote from: mcorlett on January 06, 2012, 12:42:54 PM

What parameters are sent together with the callback and in what form?

Generally: Input addresses, output addresses (where one of output address is subscribed one) and transferred amount. I want to provide information in high level form, so there won't be any advanced parsing necessary. Please note that this particular method isn't implemented yet, I'm working on blockchain indexing right now.

I also added example of expected HTTP response to the subscription call.

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: bitfreak! on January 10, 2012, 08:23:27 PM

Update: I've extended the script so that it will also display addresses as QR Codes (by using the javascript library (http://ecdsa.org/jquery.qrcode.min.js) from ecdsa.org).

It also uses AJAX instead of meta refresh. It may be buggy in some really crap browsers like the PSP browser.

I also updated the OP with a screen and changed the thread title a little bit.

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: bitfreak! on August 25, 2012, 04:33:48 AM

Another important update: I recently noticed that the private key generation wasn't producing valid private keys most of the time. I overlooked this problem because the public keys generated from those private keys seemed to be perfectly valid 100% of the time. It wasn't until I tried to import some of those keys into my StrongCoin eWallet account that I noticed the problem with the private keys (admittedly I should have tried importing the private keys earlier). Since this thread died out relatively quickly I assume not many people actually tested this script or took the time to look over the functions as I asked, otherwise I'm sure someone would have noticed this problem. So I hope it didn't cause anyone to loose any bitcoins, and I'm very sorry if this has caused you any inconveniences. Rest assured the problem appears to be completely fixed now and all private keys generated are valid. I also made a bunch of other small updates to the script if you want to test it out (such as support for blockchain.info). I can only make it better and weed out the bugs if people are willing to try it and provide me with feedback.

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: scintill on September 08, 2012, 09:26:28 PM

Quote from: bitfreak! on August 25, 2012, 04:33:48 AM

What was the problem? How crucial is it to make the private key less than the order of the generator?

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: crazy_rabbit on September 09, 2012, 09:13:44 AM

I just found this, and I'll be sure to look at it in the next week. Sounds great, nice to hear that the problems with Key generation have been solved, but it does raise a question- why not include in the script a function to double check all generated keys to ensure they are valid?

you never know. :-)

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: bitfreak! on September 09, 2012, 09:52:46 AM

Quote from: scintill on September 08, 2012, 09:26:28 PM

What was the problem? How crucial is it to make the private key less than the order of the generator?

The problem it seems, was rather trivial. The private key hex string needs to be exactly 64 characters long but some of the keys generated were shorter (smaller number). I solved it by left padding the keys with '0' until 64 characters long. It appears my script was generating valid private keys but I wasn't padding the hex string properly when they were too small. The bitcoin address is generated via hashing and so it seems if you don't pad the private key correctly you'll still get a valid looking bitcoin address but the private key you have isn't the right one for that bitcoin address. Adding in that padding causes the hashing algorithm to output a totally different bitcoin address.

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: bitfreak! on November 30, 2012, 07:59:25 AM

Ok folks I just fixed another critical but rather uncommon bug which some times happened when converting private keys to bitcoin addresses. It was somewhat similar to the last bug, some hex values needed to be padded with '0' if less than 64 characters long. I took me a while to even notice this bug so I hope it hasn't affected anyone. I lost a few BTC because of it. :'(

But I am now fairly certain the address generation and conversion functionality is totally bug free so that's a plus.

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: slimofftb on January 27, 2013, 12:41:02 AM

is there a tutorial for how to set this up???

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: bitfreak! on January 28, 2013, 09:19:32 AM

Quote from: slimofftb on January 27, 2013, 12:41:02 AM

is there a tutorial for how to set this up???

There isn't at the moment but I plan to make a short video overview/walkthrough soon. It should be released within a few weeks.

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: Jouke on February 14, 2013, 10:59:21 AM

Wow, your bitcoin.lib.php is really usefull and should alomst get a topic for itself!

Thank you very much!

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: Jouke on March 07, 2013, 06:27:50 PM

Quote from: Jouke on February 14, 2013, 10:59:21 AM

Wow, your bitcoin.lib.php is really usefull and should alomst get a topic for itself!

Thank you very much!

Again: I really think your bitcoin.lib.php should have a topic on its own as I find it really helpfull. If you ever do, here is a little contribution of my own.

I have added these functions for compressed key handling:

Quote

public static function privKeyToPubCompKey($privKey) {

$g = SECcurve::generator_secp256k1();

$privKey = self::decodeHex($privKey);
$secretG = Point::mul($privKey, $g);

$xHex = self::encodeHex($secretG->getX());
$y = $secretG->getY();
if (bcmod($y,2)){
$pre = "03";
} else {
$pre = "02";
}

$xHex = str_pad($xHex, 64, '0', STR_PAD_LEFT);
return $pre.$xHex;
}

public static function privKeyToCompAddress($privKey) {

$pubKey = self::privKeyToPubCompKey($privKey);
$pubAdd = self::pubKeyToAddress($pubKey);

if (self::checkAddress($pubAdd)) {
return $pubAdd;
} else {
return 'invalid pub address';
}
}

public static function privKeyToCompWIF($privKey) {
return self::hash160ToAddress($privKey, '80',true);
}

public static function CompWIFtoPrivKey($WIF) {
return substr(self::addressToHash160($WIF),0,-2);
}

And I changed this function:

Quote

public static function hash160ToAddress($hash160, $addressversion = BITCOIN_ADDRESS_VERSION,$compressed=false) {
if($compressed){
$hash160 = $addressversion . $hash160 . "01";
}else{
$hash160 = $addressversion . $hash160;
}
$check = @pack("H*", $hash160);
$check = hash("sha256", hash("sha256", $check, true));
$check = substr($check, 0, 8);
$hash160 = strtoupper($hash160 . $check);
return self::encodeBase58($hash160);
}

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: bitfreak! on March 08, 2013, 06:18:37 AM

Nice work, even though I'm not entirely sure what a compressed key is.

But as I said most of that bitcoin.lib.php file wasn't made by me.

It is a very useful library though with the functions I added to it.

You can create a thread about it if you like, but I don't think it's necessary.

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: Jouke on March 08, 2013, 08:48:26 AM

Compressed keys are used since version 0.6 iirc. They take up less space in the blockchain, but they also require a new wallet input format.

With new clients, when you do a dumpprivkey, you will see that the private WIF won't start with a 5.

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: MasterX on May 05, 2013, 04:18:29 PM

Anyone has a clue why i'm always gettin "*** Invalid Ciphertext ***" on the "http://127.0.0.1/sci/admin.php?page=keys#" page?
Tought it was sommething with $sec_str but im not shure as i have tried what ever i could think of.

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: MasterX on May 05, 2013, 05:25:30 PM

Quote from: MasterX on May 05, 2013, 04:18:29 PM

Never mind, forgot to remove old wif keys.

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: Eric Muyser on June 08, 2013, 05:20:29 AM

If you have problems with __autoload already declared, then open bitcoin.lib.php and remove the autoload include and include the ecc-lib files manually.

Replace this:

Code:

<?php
/**
* Bitcoin utility functions class (extended for sci lib)
*
* @author theymos (functionality)
* @author Mike Gogulski (http://www.gogulski.com/)
* @author Jacob Bruce (private/public/mini key generation)
* (encapsulation, string abstraction, PHPDoc)
*/
require_once(dirname(__FILE__).'/ecc-lib/auto_load.php');
define("BITCOIN_ADDRESS_VERSION", "00");// this is a hex byte

class bitcoin {

With this:

Code:

<?php
/**
* Bitcoin utility functions class (extended for sci lib)
*
* @author theymos (functionality)
* @author Mike Gogulski (http://www.gogulski.com/)
* @author Jacob Bruce (private/public/mini key generation)
* (encapsulation, string abstraction, PHPDoc)
*/

set_time_limit(7200);

if(extension_loaded('gmp') && !defined('USE_EXT')){
    define ('USE_EXT', 'GMP');
}else if(extension_loaded('bcmath') && !defined('USE_EXT')){
    define ('USE_EXT', 'BCMATH');
}

require_once(dirname(__FILE__).'/ecc-lib/classes/interface/PointInterface.php');
require_once(dirname(__FILE__).'/ecc-lib/classes/interface/PrivateKeyInterface.php');
require_once(dirname(__FILE__).'/ecc-lib/classes/interface/PublicKeyInterface.php');
require_once(dirname(__FILE__).'/ecc-lib/classes/interface/SignatureInterface.php');
require_once(dirname(__FILE__).'/ecc-lib/classes/interface/CurveFpInterface.php');
require_once(dirname(__FILE__).'/ecc-lib/classes/NumberTheory.php');
require_once(dirname(__FILE__).'/ecc-lib/classes/CurveFp.php');
require_once(dirname(__FILE__).'/ecc-lib/classes/SECcurve.php');
require_once(dirname(__FILE__).'/ecc-lib/classes/Point.php');
require_once(dirname(__FILE__).'/ecc-lib/classes/PrivateKey.php');
require_once(dirname(__FILE__).'/ecc-lib/classes/PublicKey.php');
require_once(dirname(__FILE__).'/ecc-lib/classes/Signature.php');
require_once(dirname(__FILE__).'/ecc-lib/classes/util/bcmath_Utils.php');

define("BITCOIN_ADDRESS_VERSION", "00");// this is a hex byte

class bitcoin {

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: bitfreak! on September 15, 2013, 02:20:47 PM

I'm having some issues with my web host at the moment but my website should be back online within a day or two. Sorry for the inconvenience.

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: bitfreak! on September 17, 2013, 05:20:40 AM

Bitfreak website is now back online.

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: bitfreak! on September 17, 2013, 01:21:34 PM

Quote from: colinistheman on September 17, 2013, 12:54:32 PM

I need to be able to send BTC payments too. Is this possible with your code?

No it's not with this script. In order to send payments to another address using PHP you will probably need to have bitcoind installed on your server. I don't really think there is any easier way but I could be wrong.

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: colinistheman on September 17, 2013, 10:33:33 PM

Quote from: bitfreak! on September 17, 2013, 01:21:34 PM

Quote from: colinistheman on September 17, 2013, 12:54:32 PM

I need to be able to send BTC payments too. Is this possible with your code?

No it's not because with this script. In order to send payments to another address using PHP you will probably need to have bitcoind installed on your server. I don't really think this is any easier way but I could be wrong.

Ok thanks

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: fbueller on October 17, 2013, 11:26:53 AM

I've written some code based on Bitcoin SCI, to back up live wallets once the balances exceed a certain amount. So far my work has only really touched the testnet. I've found the PHPECC class returns a keypair which allows valid bitcoin addresses to be derived (bitcoind's validateaddress function confirms this is OK), and have been successful in sending funds to one of these addresses.. However I can't import the private key?

Output from backup script:

Code:

Main Wallet Backup
------ 16 October 2013 10pm
Balance: BTC 0.0003
Bitcoin Address: mm5SSxdLbMV6yN59koD5kGUezgbaQbBEGE 
Transaction ID: c507000c4ead8397337fdd93979b98df6759f938550e09bc0d4985e1e2cb4599 
Private Key: 0017DDEEC21A492AD5D22046C890327C95ACFB290587F065BBDC19A35D128EDD 
WIF Format: 4imfxryzuMUsrB4T7p48fBcBHhyiv624qkXdJBRUaLz5N3hg227

Testing:

Code:

~/bitcoin-0.8.5-linux/bin$ ./bitcoind importprivkey 0017DDEEC21A492AD5D22046C890327C95ACFB290587F065BBDC19A35D128EDD
error: {"code":-5,"message":"Invalid private key"}

~/bitcoin-0.8.5-linux/bin$ ./bitcoind importprivkey 4imfxryzuMUsrB4T7p48fBcBHhyiv624qkXdJBRUaLz5N3hg227
error: {"code":-5,"message":"Invalid private key"}

~/bitcoin-0.8.5-linux/bin$ ./bitcoind validateaddress mm5SSxdLbMV6yN59koD5kGUezgbaQbBEGE 
{
    "isvalid" : true,
    "address" : "mm5SSxdLbMV6yN59koD5kGUezgbaQbBEGE",
    "ismine" : false
}

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: qrs on February 23, 2014, 06:00:27 PM

this script is great, I love it, when I will be rich I will donate you every day, bitfreak!

one question, I have working script on my site and now have few keys in wif-keys.csv file - what now? how to get BTC to my own wallet?

http://img713.imageshack.us/img713/3439/qi20.jpg

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: thonglor on March 06, 2014, 06:07:52 PM

I asked the same question. Here the reply:

Quote from: bitfreak! on March 06, 2014, 05:27:30 PM

Quote

-clicking on the "(decrypt)" besides Private Key: what needs to be entered in the upcoming dialogue? If I enter the private key generated in the beginning I get "*** Invalid Ciphertext ***"?

Many people seem to have this problem and every single time it turns out to be that they didn't copy the private RSA key properly when they generated it. Try generating a new RSA key set and make sure you copy the full private RSA key properly and also make sure you save the full public RSAkey into the sci/config.php file. Watch the installation tutorial video if you need more help figuring it out. If you sent any money to those addresses then I'm afraid you may have lost it unless you can get your existing RSA keys to work.

Quote

-and now there is the Bitcoin address for each transaction. How to get this BTC transferred somewhere? Importing the private key generated in the beginning into an Armory wallet does not work.

The private RSA key is simply used for encryption, it's not a private key for Bitcoin. When you solve the invalid ciphertext problem you'll get the private keys you need.

For importing your keys into a blockchain.info wallet:

1. Login to admin area
2. Got to Orders
3. Select MANAGE KEYS
4. Select EXPORT KEYS
5. Input private RSA key when prompted
6. Scroll down and copy text from "Blockchain.info Format" box
7. Log into Blockchain.info wallet
8. Select "Import / Export" from top menu
9. Select "Import Wallet" from side menu
10. Paste text from step 6 into box and select "Import Wallet"

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: bitfreak! on March 06, 2014, 08:11:14 PM

@thonglor: sorry I thought you were using the BitShop script. Those instructions only apply to the BitShop script. But your problem will be the same thing; you didn't copy the RSA keys properly. With this SCI script you'll have to decrypt each key separately, I don't think I included a function to decrypt them all at once. Ideally you should be saving the keys into a database and then building your own admin area based on the simple admin area I included with this script. It really isn't intended to be used as it is, it's supposed to be integrated with your projects and you should have a good knowledge of PHP to edit it.

As for how to import the decrypted private keys into your bitcoin wallet, see this page:
https://en.bitcoin.it/wiki/How_to_import_private_keys_v7%2B

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: thonglor on March 06, 2014, 09:22:43 PM

Hello bitfreak!,

OK, understand, thanks.

Then another aspect of the usage: I really want to use this script for a donation purpose. For this purpose I would not need new adresses for any transaction, just one receiveing address for all. So could I "hardcode" this one adress somewhere in the code and then disable the address generation?

BTW: I found the version number in the config.php file at the bottom...

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: bitfreak! on March 06, 2014, 09:32:03 PM

No a new address must be generated each time because they need to start with an empty balance in order to detect payments. It's difficult, if not impossible, to determine who has paid what when you're using a single address to receive all payments.

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: thonglor on March 08, 2014, 08:40:16 PM

Quote

Try generating a new RSA key set and make sure you copy the full private RSA key properly and also make sure you save the full public RSAkey into the sci/config.php file.

The private RSA key is simply used for encryption, it's not a private key for Bitcoin. When you solve the invalid ciphertext problem you'll get the private keys you need.

Hi bitfreak!,

you're right with your analysis above. After repeating the mentioned steps I can now properly generate the private key for Bitcoin. Great!

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: bitvestor on March 09, 2014, 03:25:12 PM

Quote from: bitfreak! on January 06, 2012, 08:58:01 AM

http://bitfreak.info/pics/bitsci_screen.jpg

Quote

I am testing this out now, this is great, smart move you made here, will fork around with it some more..

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: btcdrak on September 26, 2014, 04:32:27 PM

Quote from: bitfreak! on January 06, 2012, 08:58:01 AM

http://bitfreak.info/pics/bitsci_screen.jpg

Quote

Is there any chance you could relicense the code as LGPL? As a library it should be LGPL rather than GPL or it reduces what can use it a lot.

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: TXWA on January 11, 2015, 03:33:58 PM

I always receive the error "*** Invalid Ciphertext ***" if I am trying to decrypt my private keys. This even happens when I am resetting the wif-keys file. Can you please tell me how to fix this?

Thanks!

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: btcdrak on January 11, 2015, 06:58:43 PM

There is a pretty good PHP bitcoin library project here https://github.com/Bit-Wasp/bitcoin-lib-php/ which relies on https://github.com/mdanter/phpecc

The projects are also well maintained.

Title: Re: Bitcoin SCI [PHP]: process transactions yourself! (addresses gen, IPN, QR Codes)
Post by: juffer on August 15, 2016, 12:57:13 AM

Hi, thanks for publishing the script.

Can you tell me where to implement actions if payment was successfull?

I added an action in check-status.php after line 111..

Code:

$payment_status = 'payment verified!';

.. but it's not working.

Would be great if you could help me.

Best regards