Transaction validation is the process of ensuring that a transaction is legitimate before it is added to the blockchain. This involves confirming that the sender has enough funds to complete the transaction and that they are authorized to spend those funds.During this process, nodes, which are computers connected to the network, check the transaction details against the existing blockchain. They verify that the sender’s digital signature is valid and that there are no double spends, meaning the same funds are not being used in multiple transactions.Once a transaction passes these checks, it can be included in a new block with other validated transactions. Miners or validators then compete to add this block to the chain, reinforcing the integrity and security of the entire network. The validation process helps maintain trust among users and prevents fraudulent activities.Overall, transaction validation is vital for ensuring that the entire system functions securely, accurately, and efficiently, allowing users to trust that their transactions will be processed correctly.