A real-time Ethereum block explorer and DeFi transaction analyzer. Connect to any EVM-compatible RPC endpoint and inspect what's actually happening on-chain, block by block.

Block range view — Live feed of incoming blocks with a sparkline (gas or tx count), summary stats, sender/recipient/method histograms, a value flow Sankey, and per-protocol drill-down.

Block view — Deep-dive into any block:

• Tx aggregations — senders, recipients, method selectors, protocol breakdown
• Call aggregations — every contract call (including nested internal calls) across all txs, aggregated by contract + method, sortable by call count, gas, or tx count
• State access — which storage slots were read/written by which transactions; conflict detection, parallelization analysis
• Value flow — Sankey diagram of token/ETH flows through pools and protocols
• Protocol activity — per-protocol event drill-down (Uniswap V3, Aerodrome, Aave, Compound/Moonwell)
• Cross-tx account patterns — accounts that appear in multiple transactions (round-trips, borrow/repay, LP add/remove, multi-swap)

Tx view — Full transaction detail: value flows, logs, call trace, state diff.

• React + TypeScript (Vite)
• Zustand for state management
• Direct JSON-RPC over WebSocket (no ethers/viem dependency)
• debug_traceTransaction with prestateTracer + callTracer for deep block analysis

npm install
npm run dev

Then open http://localhost:5173, enter a WebSocket RPC URL (e.g. wss://base.drpc.org), and connect.

State access tracing requires a node with debug_traceTransaction support (e.g. a full node or a debug-enabled RPC provider).

Offline regression tests run via node:test and tsx, with no network access or Foundry required.

npm test

On Base (chain 8453), V4 swap currencies resolve from canonical, full-PoolId-verified PoolManager Initialize logs in loaded blocks, or the PositionManager's poolKeys(bytes25) mapping at the requested block. Lookups are connection-scoped, limited to four concurrent calls, and retry unresolved results later. Other chains are not resolved through Base deployments. No historical log scans or indexer are used.

Custom pools absent from the PositionManager mapping remain currencies unresolved unless their Initialize log is loaded; historical RPC state may also be unavailable. Amounts are pool-level Swap event deltas, not hook-adjusted final user settlement. Native ETH remains distinct from WETH. Singleton netting means per-pool settlement flows/volumes and a settlement Sankey are not provided; no transfer edges are guessed.

Run npm test for offline fixtures and malformed-ABI, chain/client/block isolation, concurrency and address-guard regressions; run npm run build for the production build. The Base repeated-swap fixture references transaction 0x75728f7a6090800f85faf0aafee2e342e9f0fc84ff42025fc48032d3741e6e8f in block 51480862. Tests require no RPC credentials.