Consensus Mechanism
The method a blockchain uses to agree on which transactions are valid and add new blocks.
Explained Simply
Consensus mechanisms are the rules that keep all computers in a blockchain network in agreement. The two most common are Proof of Work (miners solve puzzles — used by Bitcoin) and Proof of Stake (validators stake tokens — used by Ethereum, Solana, Cardano). Other types include Delegated Proof of Stake, Proof of History, and Proof of Authority. The choice of mechanism affects a blockchain's speed, energy usage, security, and decentralization.
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