Validator

A validator is an authority or mechanism that checks and confirms the accuracy, integrity, or correctness of data, transactions, or information before it is accepted or processed. In various systems, such as digital currencies or online forms, a validator ensures that inputs meet specific rules or standards, preventing errors, fraud, or invalid data from moving forward. Essentially, it's like a quality control step that verifies everything is in order, promoting trust, security, and proper functioning within the system.