Field validation refers to the process of verifying and ensuring that data entered into a system meets specific criteria before it is processed. In cryptocurrency, this often involves validating transaction details, such as wallet addresses, amounts, and signatures.During a transaction, the fields must be checked for correctness to prevent errors or fraudulent activities. For instance, a wallet address must adhere to a specific format and length, and the transaction amount must be within the sender’s available balance.Field validation can happen at different levels. Node validators check these fields when they receive transactions, ensuring that only legitimate and correctly formatted transactions are added to the blockchain. This builds trust in the system by maintaining the integrity of each transaction and the overall network.Failing to validate fields properly can lead to rejected transactions, loss of funds, or compromise of user data. Hence, robust field validation is critical for the reliability and security of cryptocurrency transactions.