Blockchain api examples

Introduction

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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 blockchain api examples generation and monitoring of addresses.

We will notify your server using a simple callback whenever a payment is received. The easiest way to blockchain api examples receiving payments is to blockchain api examples 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 blockchain api examples sent to this address, you will be blockchain api examples 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 fineor 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 blockchain api examples 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 blockchain api examples transactions, blockchain api examples 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 blockchain api examples and confirmation number is added to the blockchain. Height is an optional parameter indicating at which height blockchain api examples 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 blockchain api examples 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 blockchain api examples 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 blockchain api examples. 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 metthe service is designed to monitor millions of addresses.

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Returns balance and unconfirmed amount Amount waiting 2 confirmations of multiple addresses. Balance units are in satoshis. Returns transaction history of multiple bitcoin addresses considering them part of the same wallet. For each transaction following paramters are returned: Transactions are sorted by latest time and a limit of tx are returned. Pending transactions having less than 2 confirmations are returned in pending dict with status.

Returns detail of input transaction id. List of transaction inputs and outputs are returned. Example Request curl https: User addresses' in the tx are highlighted and net amount is calculated accordingly. You can query max 50 addresses at a time. For higher number you should upgrade your plan and set your API Key in http authorization header.

Higher rates can lead to banning of your IP. Bitcoin blocks only arrive at an average rate of once in 10 minutes. So querying multiple times a second won't return you any new data. For realtime transaction updates on address, use our websocket API. All wallet watcher api requests require apikey for access. To use apikey set the Authorization header of the https request.

Use this to get balances of bitcoin addresses you are monitoring. Example Request curl -H 'Authorization: It enables you to quickly start accepting bitcoin payments on your website. To get started add your xpub into wallet watcher and also generate api key from settings.

Feel free to copy code from our open source shopping cart. Infographic of payments API Click to expand New Address This will return a new address from your wallet to which the payer must send the payment. This call will increment index on server, so that each time you get a new address.

This will reset index to last unused address before generating new address, and is useful for testing purposes. This will match given string within your xpub to find matching account. Example Request curl -d '' -H 'Authorization: Blockonomics will send http callback for payments on your address. For each callback following parameters are returned: Callback are retried 7 times with an exponential backoff of 4 seconds.

Use Merchant Wizard to configure callback for your server. Your callback url can also contain a secret paramater for additional security. Only payments received after the given unix timestamp are notified. A websocket message is returned on successful payment containing the following fields: Definition Websocket connection to wss: Below are various API endpoints to get information about orders generated using payment buttons.

In the below requests you have to set apikey as the Authorization header of the request. Returns detail of payment button order. Returns list of all payment button orders in descending order of time. You can use limit to restrict the number of records Default is You can test payment integration without spending any bitcoins!

These test payment notifications are send from our server following API format , but not actually sent to the bitcoin network. Open source implementation of a web shopping cart using blockonomics API. Prestashop payment module to enable bitcoin payments on your website. Woocommerce plugin to accept bitcoin payments on your wordpress site.

Source code to create automated blockonomics bitcoin invoices. Infographic of payments API Click to expand.

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