GSBE - GoSlimBlockExplorer

A lightweight, self-hosted block explorer for SHA256d cryptocurrency nodes. Browse blocks, view transactions, and monitor mempool activity through a clean web interface — no database, no external dependencies, no CLI commands.

Features

• Browse recent blocks with height, hash, difficulty, and transaction count
• View full block details with complete transaction lists
• Inspect transaction inputs, outputs, values, and addresses
• Coinbase text decoding (hex to ASCII) — see pool identifiers like "GoSlimStratum"
• Mempool statistics (transaction count, size, fees)
• Search by block height or block hash
• Multi-node support — configure and switch between multiple coin nodes
• SegWit-aware — displays witness commitments and witness data

Requirements

• One or more SHA256d cryptocurrency nodes with REST API enabled (Bitcoin, DigiByte, Bitcoin Cash, etc.)
• Docker (recommended) or Go 1.24+
• No database required
• No txindex=1 required
• Works with pruned nodes

Quick Start

Docker (Recommended)

docker run -d \
--name gsbe \
-p 3007:3007 \
-v ./config:/app/config \
-v ./logs:/app/logs \
ghcr.io/mmfpsolutions/gsbe:latest

Open http://localhost:3007 and add your node connections on the config page.

Docker Compose

services:
gsbe:
image: ghcr.io/mmfpsolutions/gsbe:latestcontainer_name: gsbeports:
- "3007:3007"volumes:
- ./config:/app/config
- ./logs:/app/logsrestart: unless-stopped

Build from Source

git clone https://github.com/mmfpsolutions/gsbe.git
cd gsbe
npm install
npm run build:css
go build -o gsbe ./cmd/server
./gsbe

Local Docker Build

./build-local.sh
docker run -d -p 3007:3007 -v ./config:/app/config -v ./logs:/app/logs gsbe:local

Configuration

GSBE uses a JSON configuration file at config/config.json. A default config is created on first run.

{
"port": 3007,
"title": "Block Explorer",
"nodes": [
{
"id": "dgb_main",
"name": "DigiByte Mainnet",
"symbol": "DGB",
"host": "192.168.1.100",
"port": 14022,
"network": "mainnet",
"rest_enabled": true
}
],
"logging": {
"level": "info",
"logToFile": true,
"logFilePath": "/app/logs/gsbe.log"
}
}

Node REST API

GSBE communicates with blockchain nodes via the REST API (same port as RPC, no authentication required). Ensure your node has REST enabled:

Bitcoin/DigiByte/BCH — add to your node config:

rest=1

Supported Coins

Any SHA256d-based cryptocurrency with a Bitcoin-compatible REST API:

• Bitcoin (BTC)
• DigiByte (DGB)
• Bitcoin Cash (BCH)
• Bitcoin II (BC2)
• And other Bitcoin-derived coins

Works on mainnet, testnet, and regtest networks.

Architecture

• Backend for Frontend — Go server proxies REST calls to configured nodes
• No database — all data fetched live from nodes
• Single binary — templates and static assets embedded via go:embed
• No authentication — open access, designed for local/private network use
• No auto-polling — manual refresh to avoid excessive node REST calls

API Endpoints

Method	Endpoint	Description
GET	/health	Health check
GET	/api/v1/status	Version, uptime, memory
GET	/api/v1/nodes	List configured nodes
GET	/api/v1/{node}/chain	Blockchain info
GET	/api/v1/{node}/blocks/recent?count=10	Recent block headers
GET	/api/v1/{node}/block/{hashOrHeight}	Full block detail
GET	/api/v1/{node}/tx/{txid}?blockhash={hash}	Transaction detail
GET	/api/v1/{node}/mempool	Mempool statistics
GET	/api/v1/{node}/search?q={query}	Search by height or hash

Tech Stack

• Go 1.24+
• chi/v5 HTTP router
• Tailwind CSS
• Vanilla JavaScript
• Docker (Alpine-based, multi-arch: amd64/arm64)

Limitations

• No transaction search by txid — without txindex=1, transactions can only be viewed from within their block. Navigate to a block first, then click a transaction.
• Pruned node range — pruned nodes can only serve blocks within their pruning window. Older blocks will show as unavailable.
• No address balance lookups — GSBE is a block browser, not a full address indexer.

License

See LICENSE for details.

Credits

Built by MMFP Solutions