CRYPTO-CURRENCY PAYMENT GATEWAY

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Have you ever thought about accept bitcoin payments php include your services in exchange for Bitcoins? Also, some countries are thinking about it as a currency. Coinbase has some interesting tools and SDKs available for everyone, with accept bitcoin payments php include pricing conditions that are convenient and affordable. Really cool if you want to avoid the currency instability and transfer accept bitcoin payments php include money as soon as you can.

Just like many other online payment services, Coinbase offers two main ways of integration into your web app. The first one is faster and easier. The second one is a little more difficult, but also goes into more depth accept bitcoin payments php include is adequate for a bigger project. The first integration type consists of using one of the Merchant Tools that Coinbase makes available. You can use buttonspages and frames.

The second, of which we will see an example today, is a complete integration of the service without going to the Coinbase website to generate some standard button code. At this moment, there are three SDKs available: There are also many unofficial libraries for other languages Python. Coinbase has two ways to authenticate you as a developer in order to access the API methods. Or, if you want, you can use OAuth 2. The accept bitcoin payments php include is not only about complexity, but also about the situation you have to deal with.

The Coinbase documentation is quite clear: If you want to let the user use his account through your app a client you build, for examplethe best thing is to use OAuth.

For your first time, you will probably have to confirm your account with Authy. You will have to specify the account you want to use and what permissions you want to assign to that specific key, in order to gain access.

Also, you can choose one or more IPs to use as a whitelist. If you want to use OAuth 2. To do that, go to https: You will see a screen like this one:. Insert your application name, choose an icon if you want and specify a list of URLs for future redirect operations.

Everything else will be ignored. Give your OK and you are done! Things are not over, however: If you work with the API you will have to deal with permissions, for better security. Here you can see a complete list:. Now that we have our SDK included accept bitcoin payments php include our project, our access set up, and we know what we need, it is time to start. Just like this example:. After the user completes the authorization process he will be redirected to the URL specified before, during the setup.

A code parameter will also be added to get a valid token. Accessing to your data is quite easy. The getCurrencies method returns a list of all the currencies actually active on the system, with their ISO codes. The getExchangeRate can be used both with and without parameters with two different results, as you can see. You can also get some information about the buy and sell prices with getBuyPrice and getSellPrice:.

The payment accept bitcoin payments php include creation method is really useful, if you consider the implementation difficulty and the final result. All you have to do is to call the createButton method with a specific set of parameters. If you want to know more about that, I suggest you to take a look at the dedicated page on the official documentation. Francesco is a web developer and consultant from Italy. IT, the first italian web development portal.

He also translated some books about Laravel. In the meantime he follows other projects, works as a freelance backend consultant for PHP applications and studies IT Engineering in Rome. He loves to learn new things, not only about PHP or development but everything. He hopes to work for IBM, sooner or later.

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33 comments Bitcoin cash wallet or bitcoin core wallet

Best free bitcoin wallets

You provide an extended public key xPub and we generate a unique, unused corresponding address for your customers to send payment to. We notify you of payments to that address instantly using a callback URL of your choosing.

One of the difficulties involved with receiving bitcoin payments is the need to generate a unique address for each new user or invoice.

These addresses need to monitored and stored securely. The blockchain receive payments API takes care of the generation and monitoring of addresses. We will notify your server using a simple callback whenever a payment is received. The easiest way to start receiving payments is to open a Blockchain Wallet at https: You should create a new account inside your wallet exclusively for transactions facilitated by this API.

This method creates a unique address which should be presented to the customer. For any payments sent to this address, you will be sent an HTTP notification. This is done so you do not show the same address to two different customers. However, all funds will still show within the same account. As defined in BIP 44, wallet software will not scan past 20 unused addresses. Given enough requests from this API that don't have a matching payment, you could generate addresses past this horizon, which would make spending funds paid to those addresses quite difficult.

For this reason, this API will return an error and refuse to generate new addresses if it detects it would create a gap of over 20 unused addresses. If you encounter this error, you will either need to switch to a new xPub within the same wallet is fine , or receive a payment to one of the previous 20 created addresses. Please note, this will not increase the number of addresses that will be monitored by our servers.

Using this feature will require you understand the gap limitation and how to handle it for advanced users only:. You will be sent an HTTP notification immediately when a transaction is made, and subsequently when it reaches the number of confirmations specified in the request. You are required to specify the request's notification behaviour. Setting the behaviour to 'DELETE' will delete the request after the first relelvant notification is sent to your callback address. Setting the behaviour to 'KEEP' will send additional notifications every time a transaction with the specified confirmations and operation type is sent to or from the address in the request.

Operation type is an optional parameter indicating whether the address will be monitored for received or spent transactions, or both. By default both operation types are monitored.

You may also optionally specify the number of confirmations a transaction reaches before being sent a notification. Note that you will receive a notification at 0 confirmations i. This method allows you to request callbacks when a new block of a specified height and confirmation number is added to the blockchain.

Height is an optional parameter indicating at which height you would like to receive a block notification - if unspecified, this will be the height of the next block to arrive. Confs is another optional parameter indicating how many confirmations a block should have when a notification is sent.

When a payment is received by a generated address, or by an address monitored by a balance update request, blockchain. For balance update callbacks and additional notification will be sent once the transaction reaches the specified number of confirmations. A block notification is sent every time a new block is added to the blockchain, and matches the height and number of confirmations set in the notification request. If the server responds with anything else, or nothing, the callback will be resent again for every new block approximately every 10 minutes up to times 1 week.

Check the index gap between last address paid to and the last address generated using the using the checkgap endpoint. Use the xpub you want to check and your API key like so:. Use the exact callback in question and your API key like so:. A custom secret parameter should be included in the callback URL.

The secret will be passed back to the callback script when the callback is fired, and should be checked by your code for validity. This prevents someone from trying to call your servers and falsely mark an invoice as 'paid'. The Demo Apps below include examples of how to do this. If you would like convert payments received in Bitcoin to fiat currency quickly use a bitcoin address from an exchange wallet. A double spend occurs when a malicious user spends the same BTC twice.

A payment that initial appears successful could be reversed at a later date. This is counteracted by waiting for the transaction to be included in the blockchain and reaching a number of confirmations. It is recommended you acknowledge the transaction at zero confirmations but only trust the transaction after one confirmation.

See the PHP demo callback. There is no limit to the number of receiving address which can be generated as long as the 20 address gap limitation is met , the service is designed to monitor millions of addresses.