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What is Transaction Finality?

The point at which a blockchain transaction is irreversible.

Transaction finality is when a blockchain transaction becomes permanent and cannot be reversed, reorganized, or modified. Different blockchains achieve finality in different ways and at different speeds.

Finality by Chain

Solana: ~400ms (instant finality). Arbitrum: ~7 minutes (Ethereum L1 finality). Polygon: ~30 minutes (checkpoint finality). Base/Optimism: ~7 minutes. For payment purposes, Zateway confirms after ~20 blocks which provides practical finality much sooner.

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