Mining
Bitcoin mining is the process of using computational power to find valid blocks, securing the network and processing transactions. Miners compete to solve a cryptographic puzzle, and the winner earns newly minted bitcoin plus transaction fees from the included transactions.
How It Works
Miners collect unconfirmed transactions from the mempool, assemble them into a candidate block, and repeatedly hash the block header with different nonce values. The goal is to find a hash that falls below the current difficulty target. This process is entirely brute-force — there is no shortcut. The first miner to find a valid hash broadcasts the block to the network, and if other nodes validate it, the miner earns the block reward plus all transaction fees.
The block reward started at 50 BTC in 2009 and halves approximately every four years. This halving schedule creates a predictable, disinflationary supply curve. As the block reward decreases, transaction fees become an increasingly important incentive for miners to continue securing the network.
Mining consumes real-world energy, which is a feature, not a bug. This energy expenditure is what gives Bitcoin's proof-of-work its security guarantees. It creates a tangible, physical cost to attacking the network. No amount of political influence, corporate pressure, or regulatory action can fake the energy required to produce valid blocks.
Key Points
- Miners earn block rewards (newly minted bitcoin) plus transaction fees
- The process is competitive — only the first valid block found is accepted
- Energy consumption provides real-world security guarantees
- Mining difficulty adjusts every 2,016 blocks to maintain ~10 minute block times
- Block rewards halve every 210,000 blocks, enforcing the 21 million supply cap