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Tuesday, September 22, 2026 · Global Edition
L4 News
BLOCKCHAIN · WEB3 · ASSETS
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Blockchain

How distributed ledgers reach agreement, what a block contains, when a transaction becomes final, and which guarantees a chain does not provide.

Chart comparing how many blocks different networks require before payments become final
Blockchain

What does block finality mean?

Block finality is the moment a blockchain payment stops being reversible — and it arrives on a different schedule for every chain.

Diverse residents raising hands in a community vote to reach agreement
Blockchain

What is a consensus mechanism?

A consensus mechanism is the rule set a blockchain uses to agree on one shared record — and the choice between proof of work and proof of stake shapes…