A concrete example
A broadcast transaction has not yet reached inclusion or finality.
In context
Proof of work makes block production computationally expensive. Bitcoin nodes select the valid chain with the greatest accumulated work. Proof of stake instead uses committed capital, votes and protocol-defined penalties. Neither mechanism allows a producer to override every validity rule.
Explore the full explanation
Blockchain
Consensus and finality
Validation asks whether an operation follows the rules.
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