Transaction Reorg Risks

Transaction Reorg Risks occur when a blockchain network undergoes a reorganization, where a previously confirmed block is replaced by a different set of blocks, effectively undoing the original transactions. In financial protocols, this can cause significant issues, such as double-spending or the invalidation of cross-chain swaps that were assumed to be final.

Protocols must account for these risks by requiring a certain number of confirmations before considering a transaction irreversible. For high-value transactions, this confirmation threshold must be high enough to provide sufficient economic security against potential attackers.

Reorgs are more common in smaller or less decentralized networks, making them a significant concern for protocols that bridge to such chains. Developers must build systems that can handle the uncertainty of transaction finality, often by implementing wait periods or monitoring tools to detect reorg events in real-time.