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Basics of Solidity, Parity, JSON-RPC and Visual Studio Code

Back in 2008, concept of Bitcoin started a buzz, after the white paper on Blockchain by a mysterious person called satoshi nakamoto was published. Blockchain was basically introduced as a novel idea, however it soon gained lot of attention of public and Blockchain development companies due to its uniqueness and peculiarity. 

As of today, Bitcoin is the king of cryptocurrency and its primary use at the moment is that of currency. However apart from day to day payment we cannot harness other functionalities from Bitcoin. This is where Ethereum comes into picture.

Blockchain technology is now being used to support applications which are beyond digital currency. Launched in 2015, Ethereum is the largest and well established open source & decentralized application platform. It has created lot of excitement for its programmable platform capabilities. The potential applications of are wide ranging and they run on platform specific token called Ether.

On Ethereum platform, Smart contracts can be created using Solidity. In this way it differs from Bitcoin as it lets developer to program using solidity. Thus Ethereum not only allows currency to reside in it but software code as well.

Contracts in a Blockchain are the small computer programs that executes automatically when a pre-configured condition is met. Parties involved in the contractual agreement can automatically make payments as per the contracts in transparent manner. Smart contract exists as a byte code and is executed by Ethereum Virtual Machine. Every transaction and execution of bytecode costs an ether.

Instead of directly writing a bytecode programmer can use solidity to write smart contract. Solidity today stands as one of the premium languages that run on the Ethereum and other private Blockchain. Solidity is just one of several languages which can be compiled into Ethereum Virtual machine(EVM) bytecode. It runs on Ethereum node so as to process the transaction. solC and browser-based compilers are the most common compilers for Solidity. It is a high level programming language which is used to create contracts in Blockchain, much akin to object oriented language, solidity supports inheritance, libraries and user-defined types.

Parity

Parity is a Ethereum browser which allows user to interact with the Ethereum Blockchain. It is more like an interface. 

Screen of parity dashboard. 

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Parity has in-built contract development tool which is not visible. One has to go to settings in the navigation bar of Parity dashboard and ensure that contract is enabled. Once this is done, contract option is viewable on the bar.

Navigation menu of parity dashboard

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Contract Option Viewable on dashboard

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Once this is done, we can write a contract in the dashboard provided to us, which later on can be compiled and deployed.

JSON RPC

JSON is a data interchange format in the tokenised form. We can convert any JavaScript object into JSON, and send JSON to the server or vice versa.

JSON-RPC is a remote procedure call protocol encoded in JSON (java script object notation). It is a very simple protocol, wherein few data types and commands are defined. It allows remote execution of a function.

In JSON-RPC object is created using a method property and parameter property which contains parameters that are to be used in the functions. Information gathering field is also included so as to get response sent back from the server.

  • Method - A String with the name of the method to be invoked.
  • Params - An Object or Array of values to be passed as parameters to the defined method.
  • Id - It used to match the response with the request.

Visual Studio Code

It is source code editor developed by Microsoft and supports operating systems like windows, Linux and macOS and used by Blockchain development company in India.

Some of the features of Visual Studio code include

  • Intelligence – Apart from syntax highlighting it supports smart completion of code based on variable types, function definitions, and imported modules.
  • Debugging – Editor can be used to Debug the code.
  • Inbuilt Git Commands – It has predefined commands which makes it easier to work in Git Hub.
  • Extensible and Customizable – Multiple extensions are available to connect to new services like new languages, themes, Debuggers etc.