Definition ∞ Reverted transactions are cryptocurrency transactions that fail to complete successfully and are effectively undone, with funds typically returned to the sender. This can occur due to various reasons, including insufficient gas fees, smart contract errors, or network congestion. Although the transaction fails, a fee may still be consumed for the computational effort.
Context ∞ In blockchain networks, especially those supporting smart contracts, reverted transactions are a common occurrence and a frequent topic in user support and developer discussions. News sometimes reports on significant events involving numerous reverted transactions due to network issues or specific contract flaws. Understanding the causes of these failures is essential for optimizing transaction execution and avoiding unnecessary costs.