The Transaction Validation Layer is a crucial component in the functioning of blockchain networks. Its primary role is to ensure that all transactions meet specific criteria before being added to the blockchain.This layer verifies the authenticity of transactions by checking that digital signatures are valid and that the sender has sufficient funds. It also ensures compliance with network rules, such as preventing double-spending, where the same digital currency is attempted to be spent more than once.Once transactions are validated, they can be grouped into blocks and added to the blockchain through a consensus process. This ensures that all participants in the network agree on the state of the ledger. In summary, the Transaction Validation Layer acts as a gatekeeper that maintains the integrity, security, and trustworthiness of the entire system. It prevents fraudulent activities and ensures that all valid transactions are processed efficiently.