Chain Reorg Detector

WHAT IT DOES

Chain Reorg Detector is a security tool that simulates the detection of blockchain reorganizations (reorgs). Select a lookback depth (10-100 blocks) and polling interval (5-60 seconds) — the tool simulates monitoring for chain forks and reorgs. It displays the detection status (Reorg detected or Chain stable), lookback depth, number of reorgs detected, maximum reorg depth, uncle block count, and a detailed table of reorg events showing block number, depth, blocks lost, blocks gained, and timestamp. This is essential for developers monitoring blockchain stability, understanding reorg patterns, or assessing the risk of transaction reversals.

HOW TO USE

Connect your wallet using the BGWallet bridge (MetaMask or any Web3 wallet). Select the lookback depth — the number of recent blocks to monitor for reorgs (10, 20, 50, or 100 blocks). Select the polling interval — how often to check for reorgs (5, 10, 30, or 60 seconds). Click "Detect reorgs" to run the simulation. The tool generates simulated reorg events and displays the detection status with a status dot (red for reorg, green for stable), lookback depth, number of reorgs detected, maximum reorg depth, uncle block count, and a table of reorg events with details. Each reorg shows the block number, depth (number of blocks reorganized), blocks lost, blocks gained, and timestamp. This is useful for understanding how reorgs are detected and what information they provide.

TECHNICAL MECHANISM

The tool simulates chain reorg detection using client-side logic. It generates a random probability of a reorg (35%) and simulates reorg events with random depths (1 to lookback depth), blocks lost (the reorg depth), blocks gained (reorg depth + 0-2 extra blocks), and timestamps within the last 24 hours. The tool tracks uncle blocks (blocks that were mined but not included in the canonical chain) with a random count up to 5. The detection status is set based on whether any reorgs were simulated. The reorg events are displayed in a table with the block number, depth, blocks lost, blocks gained, and timestamp. The tool does not actually monitor real blockchain data — the detection is a simulation for demonstration and educational purposes. All operations are performed client-side — no data is stored or transmitted. The tool is read-only and does not sign any transactions.

WHAT IT CANNOT SEE

The tool cannot detect reorgs without historical block data from the RPC — the detection is a simulation. It cannot provide real-time reorg alerts without continuous polling — the simulation runs on demand. It cannot determine the exact depth or cause of a reorg without full chain data — the simulation uses simplified metrics. It cannot detect reorgs on chains that do not expose uncle or fork data — the simulation assumes uncle data is available. It cannot predict future reorgs or assess their impact on transactions — the simulation is retrospective. It cannot monitor actual blockchain events. The tool is read-only and does not sign any transactions.

PLEASE NOTE

This tool works exclusively with EVM-compatible chains for the wallet connection, but the reorg detection simulation is chain-agnostic. Solana, Tron, Starknet, SUI, TON, Aptos, Bitcoin, Cosmos, and XRP are not supported for wallet connection but the simulation works regardless. The tool provides a simulation — for real reorg detection, use node monitoring tools or RPC subscriptions. The tool does not store any data — all operations are performed client-side. The tool is provided as-is with no warranty or liability. Always verify reorg detection with multiple data sources.