Union of bitcoin and APIs

Bitcoin
and APIs
joint venture
Plugins for using bitcoins
with Wordpress
06
The big business
of bitcoins
01
What is blockchain?
02
CoinDesk, Bitpay
and Coinbase
03
INTERVIEW
Pablo Junco
04
How to create a Bitcoin
wallet with an open source
JavaScript library
05

01 The big business of bitcoins:
MAKE MONEY WITH APIS
The bitcoin network was launched in 2009 as a digital revolution.
Following various ups and downs in the value of this cryptocurrency, today
companies such as Coinbase and Bitpay are exploiting the sector by
offering services through APIs.
www.bbvaopen4u.com

Bitcoins date back to 2008, with the registration of
the bitcoin.org domain and the publication in
October that year of ‘Bitcoin: A Peer-to-Peer
Electronic Cash System’ by the pseudonymous
Satoshi Nakamoto. The bitcoin network launched
in 2009. This is perhaps one of the greatest digital
achievements of recent times. This business is
moving millions in investment every year. And this
has mainly been made possible through the
creation of application development interfaces
(APIs).
“A purely peer-to-peer version of electronic cash
would allow online payments to be sent directly
from one party to another without going through a
financial institution”. This was how the creator of
bitcoin outlined the promising concept, which at
the time was just a whitepaper. “We propose a
solution to the double-spending problem [i.e. bank
involvement] using a peer-to-peer network, ”
continues the document that gave rise to this
cryptocurrency.
Bitcoins are still part of the fintech scene, where
new ideas, projects and startups are continuously
emerging, constantly refreshing the market with
original investment opportunities, as ideas
constantly appear and disappear because of tiny
details. The history of bitcoins and their outlook
suggest that the cryptocurrency is in good health
and has a future, although its instability means that
it will never be a global virtual currency.
Some specialists in the sector believe that the
upward trend in bitcoins will hold during 2016,
remaining between 350 and 550 dollars.
01.The big business of bitcoins
www.bbvaopen4u.com

However, not surprisingly, some other analysts don't rule out a slip back towards 300 dollars. It is currently
comfortably over 500 dollars (as of 2 June 2016) and has been on a clear upward trend since October
2015.
The chart below shows the CoinDesk BPI (bitcoin price index):
$500
$400
$300
$200
Jul ´15 Oct ´15 Jan ´16 Apr ´16
www.bbvaopen4u.com

Prudence: with 2013 in mind
We are a long way from the peak when
cryptocurrency was priced at over 1,200 dollars,
in late 2013. During the period, until the virtual
currency fell to well below 300 dollars, some
bitcoiners made money from monetary
speculation, and the large data centers for bitcoin
mining found themselves in a very lucrative field,
until the drop in prices sucked the profitability out
of professional mining and renting servers for this
purpose.
However, since mid-2015 some interesting factors
have arisen that anticipate an increase in the
volume of investment in bitcoins, and a change in
the type of investors. Some key findings from the
latest CoinDesk outlook report:
• Venture capital investment increased from
362 million dollars at the end of 2014 to 490
million dollars in 2015. The growth rate was
down from 280% in 2014 to 36% in 2015.
• At the end of 2015, the volume of
transactions and the number of major firms
interested in bitcoins was four times higher
than in 2014.
• There are expected to be some 16 million
bitcoin virtual wallets in 2016, a 25% year-on-
year increase.
01.The big business of bitcoinswww.bbvaopen4u.com

16 million bitcoin wallets forecasted by 2016
www.bbvaopen4u.com

Business development based on APIs
At present, there are some leading companies
whose main business is the purchase, sale and use
of bitcoins in the various fields requiring
application development interfaces and
blockchains, the technology behind it
(transactions, M2M, prediction and privacy),
including Coinbase, Bitpay, Blockchain,
BlockCypher and Block.io.
All of these companies have one or more APIs that
provide services in the bitcoin world. Coinbase
offers an interface for the creation of bitcoin
wallets; Bitpay for the management of payments in
the cryptocurrency; Blockchain offers several
interfaces for receiving payments, processing data
blockchains, queries, transactions and virtual
wallets; and BlockCypher and Block.io offer several
simple and versatile APIs for the development of
wallets and reliable blockchain applications.

Coinbase
The Coinbase API enables development of bitcoin
applications and the integration of bitcoin
developments into existing third-party applications.
The functionality offered includes:
• Creation of bitcoin virtual wallets.
• Purchase, sale, delivery and receipt of
bitcoins.
• Safe storage of cryptocurrencies.
• Recovery and querying of historic price data.
• Receipt of notifications when a payment
occurs.
• Payment-management functionality.
The testing process for the Coinbase API takes
places in a testing environment or sandbox. In this
case, the testing environment is executed in
Testnet 3. Testnet is an alternative to the bitcoin
blockchain. This provides developers with a
testing scenario without having to use bitcoins
or real value, and without the risk of causing any
breakage in the chain of blocks on which bitcoin is
based. Testnet 3 was created to simplify the whole
testing process.

Coinbase currently has a number of mobile SDKs and libraries for application development. These are
available in various programming languages: syntax such as Ruby, Python, Node.js, PHP and Java for
libraries; and SDKs for both Android and iOS operating systems. Libraries are also available for the OAuth
authentication protocol.
Bitpay
Bitpay offers an API REST that its customers use to manage their invoices, issue reimbursements, administer
accounts and obtain real-time information on bitcoin prices. Developers can use the API through HTTP and
HTTPS requests, with the data being returned in JSON format, or, even more simply, by using libraries in
programming languages such as PHP, Node.js and Ruby. The API uses an authentication protocol that they
call BitAuth, under which each customer is assigned a specific identification ID.

What is blockchain,
the bitcoin ecosystem
based on APIs?
Blockchain is the technology supporting the process of mining and pricing
bitcoins, a procedure whereby the users of this cryptocurrency make
payments and transactions in an encrypted and authenticated form on a
distributed database.
02
www.bbvaopen4u.com

Any issue related to bitcoins is invariably linked to
blockchain, the technology on which the cryptocurrency
is based. The end result is a huge database distributed
in numerous servers all around the world that gathers all
the transactions made in bitcoins. Each one of these
operations, encrypted and authenticated, is added to
the chain of blocks –or blockchain– on which bitcoins
are based. This process would be impossible without
APIs.
The fact is that today, bitcoin technology offers many
more possibilities and arouses more interest among
developers than other online payment systems such as
PayPal, for example. Currently within the collaborative
development platform GitHub there are almost 3,200
repositories linked to PayPal, whereas there are over
8,000 repositories linked to bitcoin. This fever chart
compiled by CoinDesk shows the annual growth of both
systems since 2009.
02. What is blockchainwww.bbvaopen4u.com

02. What is blockchain
7.000
6.000
5.000
4.000
3.000
2.000
1.000
0
Dec ´09 Dec ´11 Dec ´13 Dec ´15
Bitcoin
Paypal
Bitcoin payment software developer ecosystem grew 40% in 2015
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The consulting company Deloitte recently carried out a survey within the bitcoiner community to discover
the future outlook for the sector. Some of the most interesting questions in the survey include: What fields
related to blockchain had the highest penetration forecasts for 2016? 37% of respondents said the launch of
new products, followed by new cases of use. It looks likely that 2016 will be the year blockchain definitively
enters our lives.
02. What is blockchain
What do you think will be the biggest breakthrough in the blockchain space in 2016?
Deloitte survey on the process of penetration of bitcoins in society. More than 70% believe that the launch
of new products or new cases of use will be the protagonists in 2016.
37%
35%
20%
19%
15%
Product launches
New use cases
Existing use cases with new applicability
Allances and consortiums
Other
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Anyone can use bitcoins –the only thing you need
is a virtual wallet installed in a device. You don't
even need to have much technical knowledge to
operate with this cryptocurrency, as it works in the
same way as any online payment process. What
you have to take into account is that every
transaction a user makes with bitcoins –once
verified– is added to the blockchain, and at that
precise instant it begins to form part of a shared
accounting system.
This blockchain or shared accounting system is the
result of all the transactions made with bitcoin
wallets by all the users on the Internet. Each
transaction requires a code and a signature that
identifies each user and encrypts and verifies
each transaction. Each transaction enters the
blockchain through a process known as bitcoin
mining, based on a procedure known as proof of
work (POW).
Each transaction, which is always public, must be
verified to avoid problems within the blockchain:
bitcoins must be authentic and not duplicated.
Otherwise, someone loses money. The idea is that
a series of nodes are responsible for verifying the
authenticity of each transaction, a protocol that
usually takes 10 minutes. It is reevaluated every
2016 blocks, so the process always takes around
that time to verify.
How does blockchain work?

The idea is that each transaction is verified by consensus, and the transaction authentication process
receives a commission through the proof of work. This system avoids violations without having to depend on
a trustworthy arbiter (for example a bank).

Some of the key characteristics of the
blockchain platform:
• Customer-side encryption: all the virtual
wallets used by bitcoiners use JavaScript for
encryption, which gives them protection
against possible server-side violations.
• Open code: all the code relating to the
wallets is open code, which facilitates the
joint work of the community of developers.
• Offline transactions: the wallets can operate
offline with HTML5.
• Conversion of bitcoins into 22 international
currencies.
• Transaction types: these include e-mail
processes, SMS and Facebook.
• Payment notification: e-mail, SMS, Skype or
HTTP POST calls.
• Possibility of making automatic backups of
the virtual wallet.

Simplified bitcoin blockchain

The whole transaction process, receipt and issue of payments, transactions with virtual currencies
and data management would not be possible without an application programming interface for each
function. Today blockchain has several APIs for different functionalities. Without some of these,
no one anywhere in the world would be able to make any bitcoin transactions:
• Receive Payments API: Version 2 of this interface has been available since last 1 January 2016.
This is the simplest way for a company or business to begin to accept automated payments in
bitcoins. The API is based on HTTP GET requests and is in charge of creating a single address for
each user and for each invoice issued in each bitcoin transaction, an essential condition for good
praxis.
• Blockchain Wallet API: Since last 1 January, to use of this API it has been necessary to install a
local server to manage the virtual wallet. The communication method used is based on HTTP
POST or GET calls. The process for creating a virtual wallet is known as create_wallet from this url:
http://localhost:3000/api/v2/create. Each wallet is associated to a password with a minimum
length of 10 characters, an authentication code for the API, a private code for each user, the
folder where the wallet is created, and an e-mail address.
The importance of blockchain APIs

• JSON RPC API: Since March 2016, the
universal recommendation for bitcoin users
is to use the new Blockchain Wallet API,
although the interface based on RPC calls
continues to be compatible with the old
Bitcoind RPC to interact with virtual
currencies. It can be installed and used from
libraries in numerous programming
languages: syntax such as Python, Ruby,
PHP, Node.js and .NET.
• Blockchain Data API: This can be used to
consult the data on the transactions and
operations within the blockchain in JSON
format.
• Query API: Plain text API for querying
blockchain data.
• WebSocket API: this app programming
interface gives programmers access to real-
time notifications on transactions and blocks.
• Exchange Rates API: This manages the
information on bitcoin exchange rates and
international currencies in real time and in
JSON.
• Charts & Statistics API.

COINDESK, BITPAY
AND COINBASE
APIs for developing bitcoin apps
The bitcoin-related services offered by CoinDesk, Bitpay and Coinbase
include APIs for external developers to develop apps and financial
products aimed at performing transactions and obtaining share prices.
03
www.bbvaopen4u.com

It's not a secret that the great advantages of application
programming interfaces as regards new ways of doing
business with third parties and reducing costs. Their
importance is clearly evidenced by the fact that no
company, entrepreneur or developer envisions the
present or the future without them. The same applies to
the community that offers solutions linked to bitcoins.
Without APIs it would be almost impossible to
implement the payment and transaction technology.
Using Programmable Web (the largest and best API
repository in the world with more than 15,000 APIs) as
a reference, we have created this short list of application
programming interfaces linked to the most popular
bitcoin services. However, this has been a hard decision
since there are countless projects and APIs in this
sector.
03. Coindesk, Bitpay and Coinbasewww.bbvaopen4u.com

CoinDesk is a platform that offers bitcoin-related
services. Its most used service is probably the
Bitcoin Price Index (BPI) which establishes bitcoin's
exchange price in real time. Hundreds of bitcoin-
related services use this index to calculate their
exchange policy. To include information from this
index in an application or website, external
developers only need to fulfill a single condition:
CoinDesk needs to be credited as the primary
source of the index's financial data.
This interface is a REST API which returns
information in JSON format. As it usually happens
with a REST API, the requests for this data are
made through HTTP requests. Initially, there is no
limitation on using the API or the flow of requests
for information albeit you are warned against
abuse. CoinDesk API has several endpoints from
which external developers can raise requests and
obtain answers.
CoinDesk API

For example, the API offers the exchange price of their index in several currencies to programmers of other
applications through an endpoint with the following URL:
http(s)://api.coindesk.com/v1/bpi/currentprice.json.
An endpoint is basically a remote procedure call (RPC) service that provides an access method for external
people or customers. Typically, its answer is in JSON format. Example:
/>
03. Coindesk, Bitpay and Coinbase
{"time":{"updated":"Jun 8, 2016 18:11:00 UTC","updatedISO":"2016-06-
08T18:11:00+00:00","updateduk":"Jun 8, 2016 at 19:11 BST"},"disclaimer":"This data
was produced from the CoinDesk Bitcoin Price Index (USD). Non-USD currency data
converted using hourly conversion rate from
openexchangerates.org","bpi":{"USD":{"code":"USD","symbol":"$","rate":"578.9950","desc
ription":"United States
Dollar","rate_float":578.995},"GBP":{"code":"GBP","symbol":"£","rate":"398.7741","descrip
tion":"British Pound
Sterling","rate_float":398.7741},"EUR":{"code":"EUR","symbol":"€","rate":"507.7566","des
cription":"Euro","rate_float":507.7566}}}
www.bbvaopen4u.com

Bitpay is an online payment service that allows you
to carry out transactions with bitcoins. Application
and service developers can connect to Bitpay API
to integrate features such as invoice management,
refunds, transactions, pricing, etc. into their
products. And all this is achieved through HTTP
calls made directly to Bitpay API using
programming languages such as Node.js, PHP and
Ruby. This application programming interface is
based on the REST protocol (REST API).
The API's operation is simple: any developer can
perform a HTTP call to any resource in the API and
the latter returns the requested information in
JSON format. The process can become much
more intuitive because Bitpay offers several
specific libraries for this purpose: as we explained,
libraries in multiple types of syntax; and open-
source plugins that are also available on GitHub,
These can be used to install content management
systems such as Drupal and Wordpress or
e-commerce specific toolboxes such as
Prestashop, Magento and WooCommerce. Since it
is open source, it can be downloaded and
improved by developers.
Bitpay API

API sessions are an interesting concept within
Bitpay's interface. This feature increases its security
and privacy against replay attacks; also, it ensures
that requests for information are processed in
order of arrival even if the service is interrupted.
Every HTTP call to the API is associated with a
session ID (sessionID) and a request number
(requestNumber). This process is bidirectional:
• Each additional HTTP request to the API
results in a change to the requestNumber.
The first one is assigned the number 1; the
second is assigned the number 2.
• If a customer makes a request and the service
doesn't return any information because the
service has been interrupted, the developer
can run the call again using the same
requestNumber. The API returns the
information if this has been cached;
alternatively, it sends it from scratch.

Coinbase is possibly one of the most well-known
platforms for buying, selling and using bitcoins. A
big part of its success is based on its range of APIs:
Merchants API, Exchange API and Network (Toshi)
API (currently in beta phase).
• Merchants API: this REST API allows external
developers to access and integrate all features
offered by Coinbase Merchants into their
applications; these features include accepting
online payments in bitcoins and managing
invoices. The API supports two types of
authentication: an API key for customers to
access their own accounts, and an OAuth2
protocol which creates access tokens for
external developers.
Coinbase APIs

• Exchange API: application programming
interface that allows other developers to design
trading products using bitcoins and benefiting
from secure and reliable access to the U.S.
stock market. To capture data in real time
programmers can resort to two libraries in two
different types of syntax: one library is in
Node.js (simplifies the return of information in
JSON format and the execution of requests
through the API's endpoints) and the other
library is in Ruby.
• Network (Toshi) API: Toshi is an open-source
bitcoin node developed by Coinbase to design
online apps on a large scale. It allows you to
access aggregate blockchain data: retrieve the
latest bitcoin blocks; carry out all kinds of
transactions; and obtain information about
transactions and balances.

Pablo Junco
“The banking industry is the sector
most interested in Blockchain”
Microsoft’s Strategy manager, Pablo Junco, discusses in this interview the
combination of Blockchain technology and APIs for creating platforms
aimed at driving a wide range of businesses in the financial sector.
04INTERVIEW
www.bbvaopen4u.com

Pablo Junco, Strategy manager of Microsoft, says
in this interview that the banking industry is the
sector most interested in Blockchain. The
combination of APIs and block technology results
in savings in costs and transaction times, among
other services.
He stresses that APIs are critical for success. "APIs
allow us to reach a mass of people, a kind of
customer that we had not originally considered,
and thus continue to make progress".
Like BBVA, Microsoft is committed to APIs and to
opening them to third parties. In the case of BBVA,
they are driven through its open platform, which
offers its financial APIs to help companies,
startups, customers and developers who want to
improve or transform their products and services
or create new lines of business.
This commitment to innovation is also firm at
Microsoft, through open platforms and Blockchain.
For example, using Azure BlockChain as a Service
(or Azure BaaS) -with multiple Blockchain partners
as smart contract platforms) like Ethereum, Eris
and Tendermint-, the R3 consortium has created a
peer-to-peer distributed ledger to connect banks.
04. Pablo Juncowww.bbvaopen4u.com

Don't miss Pablo Junco's views on APIs and blockchain technology in the interview below.
04. Pablo Juncowww.bbvaopen4u.com

Bitcoin wallet
How to create it with an open
source JavaScript library
Bitcore is a JavaScript library for application development within
the Bitcoin sector. The platform is ready to work with Node.js on
the server side, in a browser on the client side and to interact
with Bitcoin nodes.
05
www.bbvaopen4u.com

The world related to cryptocurrencies is always expanding. It has become a fruitful development
environment for all kinds of applications. Mobile wallets, connectors with the Bitcoin network, business
geolocators that accept virtual currency, video games with bitcoins etc. This is an interesting field for any
developer who wants to undertake something. In short, it has become a perfect breeding ground for doing
business.
It's certainly true that between late 2013 and early 2014 the price of Bitcoin shot up and, since then, the
price has first declined and then its valuation has stabilized (as can be seen in the graph). In any case, it's a
field of evident entrepreneurship.
$1000
$800
$600
$400
$200
2011 2012 2013 2014 2015 2016
05. Bitcoin walletwww.bbvaopen4u.com

Today there is a platform that combines the best of
bitcoins and JavaScript, which facilitates the
development of applications for this virtual
currency. Bitcore is an open source library that
works under the Bitcoin protocol. Being an open
source solution is a concept advantage: it facilitates
the creation of a community that constantly
enriches the tool, both independent developers and
Bitcoin businesses themselves.
The creator of Bitcore is Bitpay, which in the
document launching the tool stated that its
objective is that "developers contemplating new
Bitcoin projects should not have to resort to using
proprietary APIs hosted on services running closed
software." The Bitcore platform is ready to work
with Node.js on the server side, in a web browser
on the client side and with the ability to interact
with Bitcoin nodes.

Before you start you need to meet a set of
minimum requirements without which it would be
impossible for a Bitcore node to connect through
Bitcoin. The computer needs 100GB of disk
space and 4GB of RAM for storing data on bitcoin
blockchains (this is a public accounting system
shared between all nodes in the Bitcoin network).
In addition, a 64-bit GNU/Linux or Mac OS X
(Apple) is required. These would be the steps to
begin:
-Install Node.js. Bitpay recommends installing
Node Version Manager, that allows for updating
versions of Node.js easily. The latest version of
Node Version Manager is v.0.29.0. Link for
installation.
-Install Bitcore and create a node. It has a
command line to create and manage a full Bitcoin
node.
• Installation command: npm install -g bitcore.
This command not only installs Bitcore, it also
synchronizes with blockchain and executes
Insight Block Explorer, an open source Bitcoin
blockchain explorer with REST and WebSocket
APIs that enables developers and Bitcoin
businesses to write in virtual wallet code and
other applications that need to function and
make blockchain queries.
• Command for creating additional nodes: a
programmer can create new nodes that are not
found within the global NPM installation
directory (the one used in the previous step) or
run the Bitcore Wallet Service.
How to install and start developing with Bitcore

In that case, the developer must do the following:
• Command bitcore create mynodo.
• Creating a node in testnet, an alternative block
chain is used for testing. Therefore we would
have a TestNet cryptocurrency, which it is
different from Bitcoin. It is a way to have a
virtual currency to test on. Command for a
testnet node: bitcore create mynodo --testnet.
Both steps make it possible to create a "mynodo"
directory, to which dependencies and
configuration files can be installed to start
operating with the additional node.
• Creating an additional node when there is
already a Bitcoin directory for use. bitcore
create -d <path-to-datadirectory> mynode

One of the first objectives that a developer can
have with Bitcore is to configure the bitcoins virtual
wallet service. This service uses the same backend
that Bitpay Bitcoin wallets use, which in some ways
is very similar to what a traditional SPV (Simplified
Payment Verification) backend would be (secure
connection system with Bitcoin nodes).
Steps to follow:
• Installing dependencies: the main dependency
that would have to be installed is MongoDB, an
open source NoSQL data database system in
JavaScript and document-oriented. In this case
we always talk about implementing solutions in
this programming language. How do you install
MongoDB on Linux or Mac OS X? Here is a
tutorial.
• Add the virtual wallet service to the newly-
created node: this is possible because it already
has a node created and synchronized with the
Bitcoin blockchain. Command to execute the
virtual wallet:
How to configure a bitcoins virtual wallet with Bitcore
/>
cd <your node>
bitcore install bitcore-wallet-service
bitcore install insight-api

There are a number of services that can be deployed in any node created with Bitcore through the Insight
API. As an example, the web service lets you create an application that provides users with direct interaction
with the Bitcore node through an http or https port.
A practical example of the implementation of this service:
The new Bitcore API
/>
MyService.prohttps://bitcore.io/api/totype.setupRoutes = function(app, express)
{
// Set up routes
app.get('/hello', function(req, res) {
res.send('world');
});
// Serve static content
app.use('/static', express.static(__dirname + '/static'));
};
MyService.prototype.getRoutePrefix = function() {
return 'my-service'
};

There are also other additional services that are available in API documentation itself. You can see the
presentation of the new Bitcore application programming interface at a developer seminar in the below
video.
If you're a JavaScript developer and want to configure a bitcoin wallet, the services offered by Bitcore can be
an effective solution. Check them out.
Furthermore, if you're interested in open source topics, here is a free ebook to download.

Plugins
for using bitcoins with Wordpress
Wordpress is almost certainly the most widely used content
management system on the market. There are numerous plugins
available today that allow payment of products in bitcoins on websites
with online stores developed in this CMS.
06
www.bbvaopen4u.com

The ultimate aim of any currency, whether real or
virtual, is for it to be widely used so it becomes a
stable and reliable currency for most users. The more
companies and businesses use bitcoins to make
payments and transactions, the greater its impact
and the more possibilities it will have of becoming a
global currency. Today, this scenario is still far in the
future, but the bitcoin community is always looking
for ways to make life easier for developers and
entrepreneurs. This is why we are continually seeing
the appearance of new plugins to bring bitcoins to
Wordpress.
Wordpress is the CMS (Content Management System)
par excellence. Most business projects use it to
launch their websites on the Internet. The fact of
encouraging the online coexistence of these projects
with the collection, payment, invoicing and all kinds
transactions in bitcoins is a quick way of viralizing
their use. This is a list of the best plugins to add
features linked to this cryptocurrency to any project
in Wordpress:
06. Pluginswww.bbvaopen4u.com

Bitcoin Payments for WooCommerce is possibly
one of the most downloaded plugins in the
repository of new Wordpress features. It allows
acceptance of payment in bitcoins in online stores
based on WooCommerce, one of the most widely
used free toolboxes for Wordpress, essentially in
the form of design templates with everything you
need to sell products, from product description
pages through to a shopping cart system. The
closest rivals within the e-commerce market are:
Prestashop and Magento.
By early June 2016, this plugin had been
downloaded more than 24,400 times, with an
average of 20 a day. It is now on version 4.08,
and requires Wordpress version 3.0.1 or later to
install. Graphics offered by Wordpress:
The most interesting features of Bitcoin Payments
for WooCommerce:
Bitcoin Payments for WooCommerce

• Compatible with the Electrum bitcoin wallet:
this client has some interesting advantages such
as the use of a remote server without the need
to download the whole blockchain; portfolio of
totally recoverable addresses from a seed or
private key; sensitive security information is
never sent through the server to avoid
violations; and it is also an open code solution.
• Electrum eliminates any dependence on third
parties.
• MPK system to increase security: even if the
server and database are compromised, no one
can steal the bitcoins.
• It accepts payment in bitcoins directly in the
personal wallet.
• It calculates the exchange rate through the
settings.
• Zero fees for processing third-party payments.
• Support for many international currencies. It's
important for an online store to have this
advantage if it has international customers.
• Conversion of bitcoins with real-time exchange
information.

GoUrl Bitcoin Payment is another plugin linked to the top downloaded cryptocurrency on Wordpress. It is
one of the most successful payment gateways in bitcoin transactions. Today this feature has been
downloaded over 25,900 times by Wordpress users, with an average of 45 downloads every day.
GoUrl Bitcoin Payment Gateway & Paid Downloads & Membership

Some of its key features include:
• Open code plugin available on GitHub. This
means that any developer can download the
payment gateway on their equipment and
make any adjustments they deem necessary
for their own store.
• It doesn't require the user to associate it to a
bank account.
• Payments can be obtained directly in the
bitcoin wallets.
• It accepts not only bitcoin, but also Litecoin,
Paycoin, Dogecoin, Dash, Speedcoin,
Reddcoin, Feathercoin, Vertcoin, Vericoin and
Peercoin, a large number of cryptocurrencies
based on P2P technologies.
• It supports third-party plugins such as
WooCommerce.
• It integrates payment gateways in bitcoins in
other plugins developed by other
programmers for Wordpress users.
• This gateway allows different types of
payment: pay-per-product, pay-per-download,
pay-per-membership and pay-per-view.
GoUrl Bitcoin Payment Gateway & Paid Downloads & Membership

Stripe Payment Gateway WooCommerce Addon allows the Stripe payment gateway to be installed in the
features of an online store in a Wordpress. Stripe is one of the most successful payment platforms within the
developers community, largely because of the simplicity and utility of the application programming interface
(API). At the beginning of 2015 Stripe set up its integration with the Bitcoin payment system through this
API.
Stripe Payment Gateway WooCommerce Addon

Mollie Payments for WooCommerce is one of the
most downloaded Wordpress plugins for the
integration of a payment gateway that accepts
bitcoins, although it also incorporates other
commercial transaction systems like PayPal or
credit cards from any bank. You need to open an
account.
Features of this plugin:
• It supports several languages: English,
Dutch, German and French.
• The order, title and description can be
edited for each payment method.
• Money reimbursements for WooCommerce
2.2 and later versions.
Mollie Payments for WooCommerce

Digital Paybox is a payment plugin for Wordpress, with two types of license: a basic one for 22 dollars, and
an extended one for 110 dollars. You can add a feature that allows the end user to choose the amount and
the payment gateway when purchasing a product, either through PayPal, debit and credit cards with Stripe
or bitcoins with BitPay. Once the user has made the transaction, the plugin sends an encrypted and
temporary download link to the payer's e-mail address.
Its key features are:
• It accepts all kinds of cards, both debit and credit, and from any of the regular market providers: Visa,
MasterCard or American Express.
• It combines flexible and fixed payments and minimum payment limits.
• Payment system based on AJAX and CSS3.
• Support for several languages.
If you're a developer and you want to try financial APIs, go to BBVA's open platform.
Digital Paybox

Ebook: Fintech revolutions Ebook: APIs & Internet of ThingsEbook: Introduction to the word
of APIs
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A Company Without APIs Is Like A Computer Without Internet
BRIAN KOLE
49BBVA is not responsible for the opinions expressed in this ebook
Try BBVA's APIs at www.bbvaapimarket.com

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