Dashscan

A block explorer for the Dash network. Dashscan indexes the Dash blockchain into a PostgreSQL database and exposes it through a REST API and a web frontend.

Architecture

Component	Stack	Purpose
indexer/	Rust (Tokio, tokio-postgres)	Syncs blocks from Dash Core via JSON-RPC and ZMQ
api/	TypeScript (Fastify, Knex)	REST API backed by PostgreSQL
frontend/	React (TanStack Router/Query, Tailwind)	Web UI

Features

• Block and transaction browsing
• Address balances and transaction history
• Masternode list and detail pages
• Special transactions (coinbase, superblocks, etc.)
• UTXO tracking
• DAO governance page
• Prometheus metrics (via API)

Prerequisites

• Rust (2024 edition)
• Node.js 18+
• PostgreSQL 14+
• A running Dash Core node with RPC and ZMQ enabled

Setup

1. Database

Create a PostgreSQL database:

CREATE USER dashscan WITH PASSWORD 'dashscan';
CREATE DATABASE dashscan OWNER dashscan;

Migrations are applied automatically by the indexer on startup (Refinery).

2. Indexer

cd indexer
cp .env.example .env   # edit with your values
cargo run --release

.env variables:

Variable	Description
DATABASE_URL	PostgreSQL connection string
CORE_RPC_HOST / CORE_RPC_PORT	Dash Core RPC address
CORE_RPC_USER / CORE_RPC_PASSWORD	Dash Core RPC credentials
CORE_ZMQ_URL	ZMQ endpoint for new-block notifications
CORE_P2P_HOST / CORE_P2P_PORT	Dash Core P2P address (block catch-up + peer crawler seed)
REDIS_URL	Redis connection string (governance + peer caches)
NETWORK	mainnet or testnet
START_HEIGHT	Block height to begin indexing from
PEER_CRAWL_EVERY_BLOCKS	Run a peer crawl every N live-sync blocks (default 25; 0 disables)
PEER_CRAWL_MAX_PEERS	Safety cap on addresses visited per crawl round (default 100000)
PEER_CRAWL_CONCURRENCY	Concurrent peer connections per crawl (default 512)
PEER_CRAWL_DEADLINE_SECS	Wall-clock ceiling for one crawl round (default 600)
PEER_CRAWL_CONNECT_TIMEOUT_SECS	Per-peer connect/handshake timeout (default 3)

3. API

cd api
npm install
cp .env.example .env   # edit with your values
npm start

.env variables: DATABASE_URL, CORE_RPC_*, CORE_ZMQ_URL, NETWORK.

4. Frontend

cd frontend
npm install
npm run dev        # development (port 3000)
npm run build      # production build

Docker

Each component has a Dockerfile. Compose support can be added by wiring the three services to a shared PostgreSQL instance.

License

MIT