Definition ∞ A validity condition is a set of rules or criteria that a transaction or block must satisfy to be considered legitimate and acceptable by a blockchain network. These conditions ensure that all operations adhere to the protocol’s specifications, preventing invalid state transitions or malicious actions. They are fundamental to maintaining the integrity and security of the distributed ledger. All network participants enforce these rules.
Context ∞ Validity conditions are central to the security model of any blockchain protocol and are often discussed in news related to network upgrades, security audits, or debates about protocol design. Changes to these conditions can significantly impact how transactions are processed and how the network maintains its state. Strict adherence to validity conditions is vital for preventing fraudulent activity.
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