How to Create an Bitcoin HD Wallet with Golang and gRPC (Part l)

In this tutorial series, we are going to learn how to create an HD bitcoin wallet using Golang.

The idea of the tutorial series is not only showing how to create the Wallet and getting balances but also how to implement a grpc server and a CLI tool and a web-app for consuming it.

In this part we are going to see how to implement our grpc server.

Requirements:

  • go version go1.13.8 darwin/amd64

Also, I will assume you already have some knowledge about Golang and understand the main concepts of bitcoin, so, I will no go deep on how to install Golang or what bitcoin is.

So, let’s get started by defining what our program will do for us. To keep this tutorial small, I will split it into two parts, in this one where will create our service and a CLI tool that will allow us to create bitcoin key pairs (private and public keys) and retrieving the balance of our Wallet.

#bitcoin #go #blockchain

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How to Create an Bitcoin HD Wallet with Golang and gRPC (Part l)
Easter  Deckow

Easter Deckow

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PyTumblr: A Python Tumblr API v2 Client

PyTumblr

Installation

Install via pip:

$ pip install pytumblr

Install from source:

$ git clone https://github.com/tumblr/pytumblr.git
$ cd pytumblr
$ python setup.py install

Usage

Create a client

A pytumblr.TumblrRestClient is the object you'll make all of your calls to the Tumblr API through. Creating one is this easy:

client = pytumblr.TumblrRestClient(
    '<consumer_key>',
    '<consumer_secret>',
    '<oauth_token>',
    '<oauth_secret>',
)

client.info() # Grabs the current user information

Two easy ways to get your credentials to are:

  1. The built-in interactive_console.py tool (if you already have a consumer key & secret)
  2. The Tumblr API console at https://api.tumblr.com/console
  3. Get sample login code at https://api.tumblr.com/console/calls/user/info

Supported Methods

User Methods

client.info() # get information about the authenticating user
client.dashboard() # get the dashboard for the authenticating user
client.likes() # get the likes for the authenticating user
client.following() # get the blogs followed by the authenticating user

client.follow('codingjester.tumblr.com') # follow a blog
client.unfollow('codingjester.tumblr.com') # unfollow a blog

client.like(id, reblogkey) # like a post
client.unlike(id, reblogkey) # unlike a post

Blog Methods

client.blog_info(blogName) # get information about a blog
client.posts(blogName, **params) # get posts for a blog
client.avatar(blogName) # get the avatar for a blog
client.blog_likes(blogName) # get the likes on a blog
client.followers(blogName) # get the followers of a blog
client.blog_following(blogName) # get the publicly exposed blogs that [blogName] follows
client.queue(blogName) # get the queue for a given blog
client.submission(blogName) # get the submissions for a given blog

Post Methods

Creating posts

PyTumblr lets you create all of the various types that Tumblr supports. When using these types there are a few defaults that are able to be used with any post type.

The default supported types are described below.

  • state - a string, the state of the post. Supported types are published, draft, queue, private
  • tags - a list, a list of strings that you want tagged on the post. eg: ["testing", "magic", "1"]
  • tweet - a string, the string of the customized tweet you want. eg: "Man I love my mega awesome post!"
  • date - a string, the customized GMT that you want
  • format - a string, the format that your post is in. Support types are html or markdown
  • slug - a string, the slug for the url of the post you want

We'll show examples throughout of these default examples while showcasing all the specific post types.

Creating a photo post

Creating a photo post supports a bunch of different options plus the described default options * caption - a string, the user supplied caption * link - a string, the "click-through" url for the photo * source - a string, the url for the photo you want to use (use this or the data parameter) * data - a list or string, a list of filepaths or a single file path for multipart file upload

#Creates a photo post using a source URL
client.create_photo(blogName, state="published", tags=["testing", "ok"],
                    source="https://68.media.tumblr.com/b965fbb2e501610a29d80ffb6fb3e1ad/tumblr_n55vdeTse11rn1906o1_500.jpg")

#Creates a photo post using a local filepath
client.create_photo(blogName, state="queue", tags=["testing", "ok"],
                    tweet="Woah this is an incredible sweet post [URL]",
                    data="/Users/johnb/path/to/my/image.jpg")

#Creates a photoset post using several local filepaths
client.create_photo(blogName, state="draft", tags=["jb is cool"], format="markdown",
                    data=["/Users/johnb/path/to/my/image.jpg", "/Users/johnb/Pictures/kittens.jpg"],
                    caption="## Mega sweet kittens")

Creating a text post

Creating a text post supports the same options as default and just a two other parameters * title - a string, the optional title for the post. Supports markdown or html * body - a string, the body of the of the post. Supports markdown or html

#Creating a text post
client.create_text(blogName, state="published", slug="testing-text-posts", title="Testing", body="testing1 2 3 4")

Creating a quote post

Creating a quote post supports the same options as default and two other parameter * quote - a string, the full text of the qote. Supports markdown or html * source - a string, the cited source. HTML supported

#Creating a quote post
client.create_quote(blogName, state="queue", quote="I am the Walrus", source="Ringo")

Creating a link post

  • title - a string, the title of post that you want. Supports HTML entities.
  • url - a string, the url that you want to create a link post for.
  • description - a string, the desciption of the link that you have
#Create a link post
client.create_link(blogName, title="I like to search things, you should too.", url="https://duckduckgo.com",
                   description="Search is pretty cool when a duck does it.")

Creating a chat post

Creating a chat post supports the same options as default and two other parameters * title - a string, the title of the chat post * conversation - a string, the text of the conversation/chat, with diablog labels (no html)

#Create a chat post
chat = """John: Testing can be fun!
Renee: Testing is tedious and so are you.
John: Aw.
"""
client.create_chat(blogName, title="Renee just doesn't understand.", conversation=chat, tags=["renee", "testing"])

Creating an audio post

Creating an audio post allows for all default options and a has 3 other parameters. The only thing to keep in mind while dealing with audio posts is to make sure that you use the external_url parameter or data. You cannot use both at the same time. * caption - a string, the caption for your post * external_url - a string, the url of the site that hosts the audio file * data - a string, the filepath of the audio file you want to upload to Tumblr

#Creating an audio file
client.create_audio(blogName, caption="Rock out.", data="/Users/johnb/Music/my/new/sweet/album.mp3")

#lets use soundcloud!
client.create_audio(blogName, caption="Mega rock out.", external_url="https://soundcloud.com/skrillex/sets/recess")

Creating a video post

Creating a video post allows for all default options and has three other options. Like the other post types, it has some restrictions. You cannot use the embed and data parameters at the same time. * caption - a string, the caption for your post * embed - a string, the HTML embed code for the video * data - a string, the path of the file you want to upload

#Creating an upload from YouTube
client.create_video(blogName, caption="Jon Snow. Mega ridiculous sword.",
                    embed="http://www.youtube.com/watch?v=40pUYLacrj4")

#Creating a video post from local file
client.create_video(blogName, caption="testing", data="/Users/johnb/testing/ok/blah.mov")

Editing a post

Updating a post requires you knowing what type a post you're updating. You'll be able to supply to the post any of the options given above for updates.

client.edit_post(blogName, id=post_id, type="text", title="Updated")
client.edit_post(blogName, id=post_id, type="photo", data="/Users/johnb/mega/awesome.jpg")

Reblogging a Post

Reblogging a post just requires knowing the post id and the reblog key, which is supplied in the JSON of any post object.

client.reblog(blogName, id=125356, reblog_key="reblog_key")

Deleting a post

Deleting just requires that you own the post and have the post id

client.delete_post(blogName, 123456) # Deletes your post :(

A note on tags: When passing tags, as params, please pass them as a list (not a comma-separated string):

client.create_text(blogName, tags=['hello', 'world'], ...)

Getting notes for a post

In order to get the notes for a post, you need to have the post id and the blog that it is on.

data = client.notes(blogName, id='123456')

The results include a timestamp you can use to make future calls.

data = client.notes(blogName, id='123456', before_timestamp=data["_links"]["next"]["query_params"]["before_timestamp"])

Tagged Methods

# get posts with a given tag
client.tagged(tag, **params)

Using the interactive console

This client comes with a nice interactive console to run you through the OAuth process, grab your tokens (and store them for future use).

You'll need pyyaml installed to run it, but then it's just:

$ python interactive-console.py

and away you go! Tokens are stored in ~/.tumblr and are also shared by other Tumblr API clients like the Ruby client.

Running tests

The tests (and coverage reports) are run with nose, like this:

python setup.py test

Author: tumblr
Source Code: https://github.com/tumblr/pytumblr
License: Apache-2.0 license

#python #api 

Cryptocurrency Wallet Development| Develop your Safe and Secured Crypto Wallet

The development of cryptocurrency wallet should be done under the guidance of professionals. They have practical experience and in-depth expertise to build a feature-rich crypto wallet.
One such experienced [cryptocurrency wallet development company](Associate with them and view their free wallet demo, https://www.antiersolutions.com/cryptocurrency-wallet-app-development/ “cryptocurrency wallet development company”) is Antier Solutions. They are in the Fintech domain from the past 5 years. Their domain-specific experts include a team of over 100 professionals who have hands-on with blockchain coding. They can fulfill your desire to build both white label and customized cryptocurrency wallet from scratch. Subject matter experts of Antier focuses especially on building a multi-layer secured crypto wallet with the attributes of multi-signature, two-factor authentication, biometric authentication, and others.
Associate with them and view their free wallet demo, https://www.antiersolutions.com/cryptocurrency-wallet-app-development/

#cryptocurrency wallet development #how to create cryptocurrency wallet #bitcoin wallet development #how to create a bitcoin wallet

How To Create a Bitcoin Wallet App?

Cryptocurrency is taking over the world. Bitcoins are particular. They have become very common among people. But, even though bitcoins have become so common, there are still questions about where to keep them safe? The answer can be difficult because you can not keep virtual money in a bank. The answer to keeping bitcoins safe is keeping them in a personal Bitcoin Wallet Application. Bitcoin has no owner or no one who controls it. But anyone can become a member of it. This is why bitcoin app development is not as difficult as it sounds. This application will help you make different transactions any time you want, including burning cryptocurrency and selling it. Bitcoin wallet application development is a great marketing tool. This is because bitcoin has easy payment accepting modes that help in attracting more customers to your company. For more details click on the link.

#bitcoin wallet application development #bitcoin app development in uae #dedicated bitcoin app developer #app development, #bitcoin app development #bitcoin

How to Create a Bitcoin HD Wallet with Golang and gRPC - part 1

In this tutorial series, we are going to learn how to create an HD bitcoin wallet using Golang.

The idea of the tutorial series is not only showing how to create the Wallet and getting balances but also how to implement a grpc server and a CLI tool and a web-app for consuming it.

In this part we are going to see how to implement our grpc server.

Requirements:

go version go1.13.8 darwin/amd64

Also, I will assume you already have some knowledge about Golang and understand the main concepts of bitcoin, so, I will no go deep on how to install Golang or what bitcoin is.

So, let’s get started by defining what our program will do for us. To keep this tutorial small, I will split it into two parts, in this one where will create our service and a CLI tool that will allow us to create bitcoin key pairs (private and public keys) and retrieving the balance of our Wallet.

#blockchain #bitcoin #golang #go #cryptocurrency

How much does it cost to build a Bitcoin Wallet App?

The growth of bitcoins had left almost all the financial business verticals amazed as well as customers, Hense there has been massive demand for the bitcoin-based mobile apps. Bitcoin is not a real coin made of any metal, but it is a form of cryptocurrency. The people conduct peer-to-peer transactions with ease for free of cost or at very low cost.

Bitcoin Wallet App

Due to impactful influence on the world market, a number of companies have already started to implement this cryptocurrency as it makes payments even more simplified. So, the bitcoins have become popular in the form of mobile applications. There are various Bitcoin wallet apps in app store like Blockchain. info, Electrum, Bread, Airbitz, BitPay, Copay, Paper wallet or Ledger that allow people to buy and sell bitcoins in a reliable manner.

Know Some Prominent Features of Bitcoin Wallet App

User Side Features

  • The Sellers and Buyers
  • User Registration
  • Manage Account
  • Buy Bitcoins
  • Sell Bitcoins
  • Filtered Search
  • Request a Deal
  • Identify the buyers
  • User status
  • Push Notifications

Admin Panel Features

  • User Management
  • Membership Management
  • Advertisement Management
  • Accept Pin Reset Request
  • Manage to Withdraw Request
  • Transaction Management

Advanced Features Of Bitcoin Wallet Application

  • QR Code Scanner
  • Auto-Cancellation of Twice Payments
  • Optional Logout
  • 2-factor Authorization
  • Recurring Billing and Invoicing

Cost Idea To Develop Bitcoin Wallet App

If we proceed to the costing calculation part then the approximate cost of Bitcoin Based Wallet app can be around $50,000 to $1,00,000. It is just a rough idea of cost estimation and final cost will be vary based on client’s requirements like a number of native apps, a variety of features which they want to cover.

At AppClues Infotech, we have skilled professionals who have in-depth knowledge and have great expertise to help you build your own Bitcoin Wallet App. Our portfolio bag consists different types of applications covering all niches and domains.

#bitcoin wallet app #cost to build a bitcoin wallet app #develop bitcoin wallet app #wallet app