How Does the Longest Chain Rule Prevent Double-Spending in PoW? ⎊ Path

How Does the Longest Chain Rule Prevent Double-Spending in PoW?

The longest chain rule dictates that all honest nodes must follow the blockchain with the most cumulative Proof-of-Work (the longest chain). If a double-spend attempt occurs, it creates a temporary fork.

Honest miners will continue building on the chain they first saw, making the attacker's chain shorter and eventually discarded by the network, thus invalidating the double-spend.

How Does ‘Nakamoto Consensus’ Enforce the Longest Chain Rule?

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What Is the Difference between the “Longest Chain Rule” and the “Heaviest Chain Rule” in PoW?

What Is the “Longest Chain Rule” and How Does It Prevent Confirmed Double-Spending?

How Do Forks, Both Accidental and Malicious, Relate to the Longest Chain Rule?

What Is the ‘Longest Chain Rule’ in Proof-of-Work?

What Is the Relationship between the Block Reward and the Security Provided by the Longest Chain Rule?