Txn

Txn is an abbreviation for transaction, a term used across computing, finance, and information systems to denote a unit of work that should be completed as a whole or not at all. This concept is centered on ensuring data integrity, consistency, and traceability, especially in environments where multiple operations affect shared state or value.

In databases, a transaction groups one or more operations into a single logical unit. Transactions adhere to ACID properties: atomicity, consistency, isolation, and durability. They can be started, committed to make changes permanent, or rolled back to revert changes if an error or conflict occurs. In distributed systems, transactions may require coordination protocols such as two-phase commit to maintain consistency across multiple resources.

In software development, txn is commonly used as a variable or abstraction name representing a transaction, a unit of work, or a commit scope. Concepts like transactional memory and the unit-of-work pattern help manage changes to in-memory state or persistent storage in a safe, atomic manner, often with explicit begin, commit, and rollback operations.

In blockchain and payments, txn or tx is a shorthand for a transaction that records a value transfer or state change on a ledger, blockchain, or payment network. Transactions are broadcast, validated, and included in blocks, incurring costs such as fees or gas depending on the platform.

In finance and enterprise software, txn appears in user interfaces, APIs, and documentation as a concise label for transaction records, entries, or operations, reflecting its broad applicability to any discrete, auditable action.