Midnight Preprod Explorer

Block explorer and indexer for Midnight Preprod Network.

Network Details

Property	Value
Network	Midnight Preprod
RPC	wss://rpc.preprod.midnight.network
Genesis Hash	0x47966a2b82275f75cf0b7e51e4161b546158e8ce2cc9e743b7caa10735e06830
Node Version	0.20.0-76958d41
Ledger Version	ledger-7.0.0-rc.2
API Port	3004

Quick Start

# Install dependencies
npm install

# Start indexer + API
npm run dev

# Or just the API (if already indexed)
npm run api-only

API Endpoints

Endpoint	Description
GET /health	Health check
GET /api/network	Network info
GET /api/stats	Indexer statistics
GET /api/blocks	List blocks (paginated)
GET /api/blocks/:heightOrHash	Get block by height or hash
GET /api/blocks/:height/extrinsics	Block extrinsics
GET /api/blocks/:height/events	Block events
GET /api/extrinsics	Recent extrinsics
GET /api/extrinsics/:hash	Get extrinsic by hash
GET /api/search?q=...	Search by hash or height
GET /api/epoch	Current epoch info
GET /api/analytics/extrinsic-types	Extrinsic distribution
GET /api/analytics/block-rate	Block production rate

Project Structure

preprod-explorer/
├── src/
│   ├── index.ts           # Entry point
│   ├── config.ts          # Network configuration
│   ├── indexer/
│   │   ├── database.ts    # SQLite database layer
│   │   └── indexer.ts     # Block indexer
│   └── api/
│       └── server.ts      # Express API server
├── data/
│   └── preprod.db         # SQLite database (auto-created)
├── package.json
└── tsconfig.json

Current Services on This Machine

Port	Service	Network
3001	midnight-indexer	testnet-02
3002	preview-indexer	preview
3003	midnight-preview-indexer	preview (built)
3004	preprod-explorer	preprod

Database Schema

blocks

• height (PK), hash, parent_hash, state_root, extrinsics_root, timestamp, extrinsics_count

extrinsics

• id, hash, block_height, block_hash, index_in_block, section, method, args, signer, timestamp

events

• id, block_height, block_hash, extrinsic_index, event_index, section, method, data, timestamp

epoch_info

• epoch, sidechain_slot, mainchain_epoch, mainchain_slot, next_epoch_timestamp, committee