What Is ‘Transaction Finality’ and How Does It Differ across Various Blockchain Architectures?

Transaction finality is the guarantee that once a transaction is recorded on the blockchain, it cannot be reversed, altered, or canceled. In PoW chains like Bitcoin, finality is probabilistic, meaning it increases with each confirmation but is never 100% certain (only economically infeasible to reverse).

In some PoS systems, finality can be absolute or 'cryptographic,' meaning the network consensus makes a reversal mathematically impossible after a certain point.

How Does the ‘Economic Finality’ of PoS Compare to the ‘Probabilistic Finality’ of PoW?
What Is the Difference between Probabilistic and Absolute Finality?
What Are the Security Trade-Offs between a Fast Finality PoS Chain and a Slower PoW Chain?
How Does Transaction Finality Differ between Various Consensus Mechanisms?
How Does ‘Finality’ Differ between PoW and PoS Blockchains?
Explain the Concept of “Finality” in a Consensus Mechanism
How Does the Finality Guarantee in PoS Compare to the Probabilistic Finality in PoW?
How Does the Concept of ‘Finality’ Differ in a BFT System versus a Proof-of-Work System?