Crypto Mining

Crypto mining is the process by which new cryptocurrency transactions are verified and added to the blockchain, and new coins are issued as rewards. Miners use specialised computers to solve complex mathematical puzzles in a competition to validate the next block of transactions.

What Is Crypto Mining?

In a Proof of Work blockchain like Bitcoin, miners compete to find a valid solution to a cryptographic puzzle. The first miner to find the solution gets to add the next block to the blockchain and receives a reward in newly created cryptocurrency (block reward) plus transaction fees paid by users.

How Bitcoin Mining Works

1. Pending transactions are broadcast to the network
2. Miners collect transactions into a candidate block
3. Miners run the SHA-256 hash function repeatedly with different inputs (called a nonce) until the result meets the network’s difficulty target
4. The first miner to find a valid hash broadcasts the block to the network
5. Other nodes verify and accept the block
6. The winning miner receives the block reward (currently 3.125 BTC after the April 2024 halving) plus transaction fees

Mining Hardware

– **CPU mining**: basic computers; unprofitable today for major coins
– **GPU mining**: graphics cards; still used for some altcoins like Ethereum Classic
– **ASIC miners**: application-specific integrated circuits built only for mining; dominate Bitcoin mining

Is Crypto Mining Legal in India?

Crypto mining is not explicitly banned in India. However, miners face:
– High electricity costs that reduce profitability
– Income from mining is taxable as business income at applicable slab rates
– No specific regulatory framework for mining operations

Environmental Concerns

Bitcoin mining is energy-intensive. The global Bitcoin network consumes approximately 100-150 TWh annually, comparable to some countries. This is a significant criticism of Proof of Work consensus, leading many newer blockchains to adopt Proof of Stake.

Practical Example

Rahul sets up three ASIC mining machines in a warehouse in a state with low electricity rates. He connects them to a mining pool, which combines hash power with hundreds of other miners. Together, the pool wins blocks more regularly. Rahul receives his share of the block reward proportional to his hash rate contribution.

Key Takeaways

– Crypto mining validates transactions and creates new cryptocurrency through solving cryptographic puzzles
– Miners compete to find valid block hashes; the winner adds the block and earns the block reward
– ASIC miners dominate Bitcoin mining; GPU mining is viable for some altcoins
– In India, mining income is taxable as business income; electricity costs make mining challenging
– Proof of Work mining is energy-intensive; Ethereum switched to Proof of Stake to reduce energy use