Telegram Bots and Mini-Apps Developer with Blockchain Salary in 2024

Where is Blockchain used?

Chomp-chomp on Cryptocurrency

• Crypto currencies: Satoshi's playground for digital dough. Where every transaction is a secretive whisper in the vast ledger.

Farmville goes Fintech

• Smart Contracts: Self-executing contracts with the terms directly written into code. It's like your computer puts on a lawyer's hat and decides to play judge and jury.

The Art of the Ghostly Galleries

• NFTs: Tokenizing your doodles into exclusive collectibles. Imagine selling your stick figures for a fortune, all thanks to blockchain magic!

Supply Chain Shenanigans

• Supply Chains Transparency: It's like having a truth serum for products. From the farm to your plate, blockchain tells no lies about the journey.

Blockchain Alternatives

Distributed Ledger Technology (DLT)

Distributed Ledger Technology is a digital system for recording transactions of assets where transactions and their details are recorded in multiple places at the same time. Unlike traditional databases, DLT has no central data store or administrative functionality.

# Example: Simple Distributed Ledger pseudocode
ledger = {}
def add_transaction(transaction, ledger):
    ledger[transaction.id] = transaction

add_transaction(new_transaction, ledger)

• High security due to decentralization and cryptographic algorithms


• Reduction in transaction costs by eliminating intermediaries


• Increased transparency and traceability of transactions


• Performance issues due to scaling challenges


• High energy consumption for certain consensus mechanisms


• Regulatory challenges and uncertain legal frameworks

Directed Acyclic Graphs (DAGs)

DAGs are a data structure that uses a topological ordering. The sequence can only go from earlier to later. It's a system similar to blockchains but with no blocks or chains, and it often features a different consensus mechanism.

# Example: Simple DAG representation in Python
dag = {
    'A': ['B', 'C'],
    'B': ['D'],
    'C': ['D'],
    'D': []
}

def has_path(graph, source, destination):
    if source == destination:
        return True
    for neighbor in graph[source]:
        if has_path(graph, neighbor, destination):
            return True
    return False

• Low transaction fees due to structures optimizing the use of resources


• Scalable systems due to parallel processing of transactions


• Environmentally friendly compared to proof-of-work blockchains


• Less tested and proven than blockchain technology


• Can be more complex to understand and adopt


• Potential for centralized control in some implementations

Tangle

Tangle is the underlying protocol of IOTA, it is a type of DAG. For a transaction to be valid, it must confirm two previous transactions. This idea eliminates miners and ensures high transaction throughput.

# Example: Send a transaction using IOTA's Tangle
from iota import Iota, ProposedTransaction, Address
api = Iota('https://nodes.devnet.iota.org:443', 'SEED')
tx = ProposedTransaction(address=Address('RECIPIENTADDRESS'), value=0, message=TryteString.from_unicode('Your message'))
api.send_transfer(transfers=[tx])

• No transaction fees, making micro-transactions viable


• Scalability potential is high with transactions confirming each other


• Environmentally friendly: no energy-intensive mining is required


• Limited adoption compared to more established systems


• The unique system can result in a steep learning curve


• Network security still being researched and potentially vulnerable

Quick Facts about Blockchain

Who Let The Blocks Out?

Believe it or not, the blockchain frenzy kicked off in 2008 with Satoshi Nakamoto's white paper, a shadowy figure whose real identity remains as mystifying as a magic trick. This genius (or geniuses, for all you conspiracy theorists out there) proposed a revolutionary secure chain of blocks - hence the clever name 'blockchain' - to underpin Bitcoin, bringing the notion of cryptocurrencies from geeky chat rooms to the real-world market. This isn't your grandpa's ledger!

Blockchain Goes to Kindergarten

By 2015, the software world had a new baby genius called Ethereum. It was like someone decided to feed the original blockchain some brainy spinach; suddenly, it could handle 'smart contracts'. These aren't contracts that went to Harvard but pieces of code that execute themselves when certain conditions are met. Imagine a vending machine that high-fives you when you feed it the right amount of coins. That's Ethereum for you!

Cutting The Cord With No Regrets

And just when you thought things couldn't get any more sci-fi, along come permissionless or public blockchains - an all-comers digital utopia where anyone can join in the fun. No VIP pass or secret handshake needed; you could participate anonymously. It's like a masquerade ball where everyone's invited and the punch bowl is full of digital trust.

// Solidity, the language du jour for Ethereum smart contracts
contract HighFiveMachine {
    function giveHighFive() public payable {
        if(msg.value == 1 ether) {
            // Code to trigger the high-five mechanism!
        }
    }
}

What is the difference between Junior, Middle, Senior and Expert Blockchain developer?

Top 10 Blockchain Related Tech

1. Solidity

   
   

   Imagine writing a letter to your computer that says, "Hey, let's make a deal!" That's Solidity. It's the go-to language for Ethereum smart contracts, sorta like the VIP pass to blockchain parties. And remember, a smart contract is like a vending machine: you put something in, and it magically gives you what you want (if you follow the rules).

   
   

   
   // A simple Solidity contract
   contract HelloWorld {
       string public greet = "Hello World!";
   }
   

   
   




2. Node.js

   
   

   You know how everyone has that one friend who’s good at everything? Well, in blockchain, that's Node.js. It's the Swiss Army knife for creating speedy, scalable network applications, and it's like that friend who keeps popping up at all your parties because it's just that good for developing decentralized applications (dApps).

   
   

   
   // Node.js can be used to interact with a blockchain
   const Web3 = require('web3');
   const web3 = new Web3('http://localhost:8545');
   

   
   




3. Truffle Suite

   
   

   Ever baked a cake with just a spoon? Neither have we. That's why we use Truffle Suite; it's the whole kitchen for blockchain chefs. It helps you bake up your smart contracts without leaving a mess, doing everything from development to testing. And it's got a sweet name, to boot!

   
   

   
   // Compiling contracts with Truffle
   truffle compile
   

   
   




4. Hyperledger Fabric

   
   

   This isn't your grandma's quilt. Hyperledger Fabric is for the suit-and-tie kids who want a modular, private blockchain. It's like LEGO blocks for grown-ups, business style. You can pick and choose the parts you need for a fancy, enterprise-level blockchain that plays well with others, but still knows how to keep a secret.

   
   




5. IPFS

   
   

   Think of IPFS (InterPlanetary File System) as a treasure map for storing and finding files in a distributed way. It's like a game of hide and seek with data. Instead of asking for directions, you get a 'hash'—a secret code that leads you to your file. So it's kinda like saying "X marks the spot" but in the language of the future.

   
   




6. Web3.js

   
   

   Web3.js is like your digital wand for interacting with the Ethereum blockchain. It's a collection of libraries that let you perform magical acts—like sending Ether from one account to another. Without it, you're basically a Muggle trying to play Quidditch.

   
   

   
   // Sending Ether using Web3.js
   web3.eth.sendTransaction({
     from: '0x123...',
     to: '0x456...',
     value: web3.utils.toWei('1', 'ether')
   })
   

   
   




7. Infura

   
   

   If you're tired of maintaining your own Ethereum node, meet Infura. It's like renting a condo instead of building a house. Infura provides quick and easy access to the Ethereum network without all the fuss of running your server, so you can focus on the fun stuff, like creating cool apps.

   
   




8. Metamask

   
   

   Metamask is your blockchain buddy that lives in your browser. It's like having a pet that manages your Ethereum transactions for you. Plus, it's an essential tool for anyone diving into the world of dApps, as it serves as your digital wallet and passport.

   
   




9. Ganache

   
   

   Want to test your blockchain applications with the convenience of a Sunday brunch? Use Ganache! It's like a personal blockchain for you to play with, make mistakes, and not have to cry over spilled Ether. Ganache gives you a safe space to screw up and learn—like training wheels for smart contract development.

   
   

   
   // Starting Ganache for local blockchain simulation
   ganache-cli
   

   
   




10. Drizzle

    
    

    Drizzle makes your dApp as smooth as a jazz solo. It keeps your data in sync with the blockchain, refreshing only what's changed and not the whole gig. It's part of the Truffle Suite, and it keeps your app's front end cooler than the other side of the pillow.