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For newcomers, blockchain transactions often feel deceptively simple. A button is pressed, a transaction appears as “pending,” and after some time it is marked as “confirmed.” This surface-level experience hides a complex coordination process taking place across thousands of independent computers, none of which trust each other and none of which are centrally controlled. Understanding how a transaction is confirmed on blockchain networks is not merely a technical curiosity. I

Blockchains do not rely on trust in institutions, administrators, or central authorities. Yet they still manage to agree on a single, shared version of truth. This apparent contradiction is resolved through consensus mechanisms . Consensus is the invisible engine that allows decentralized systems to function. Without it, blockchains would be nothing more than disconnected databases with no agreement on history, ownership, or validity. Understanding consensus is essential to u