A self-hosted block explorer for Bitcoin testnet4, Litecoin testnet (with MWEB) and Monero testnet + stagenet. It serves blocks, transactions, addresses, the mempool, mining and fees from your own node, with per-chain extras like MWEB peg tracking and Monero ring details.

It also speaks a drop-in Esplora / mempool.space-compatible REST API on the Bitcoin and Litecoin lanes, so a compatible wallet (e.g. TestnetWallet) can point at it too.

Pure PHP + SQLite. No Composer, no framework, no build step. Drop the folder into an Apache docroot (/var/www/testnetscan.com) and go.

browser · wallet ──Esplora REST──▶ TestnetScan (PHP)
                          ├─ Electrum TCP ─▶ ElectrumX            (BTC + LTC address index)
                          ├─ JSON-RPC ─────▶ bitcoind / litecoind (blocks, tx, mempool, fees, broadcast, MWEB pegs)
                          └─ JSON-RPC ─────▶ monerod              (Monero lane: blocks, tx, rings, mempool)
SQLite = response cache + optional MWEB peg index

bitcoind/litecoind alone can't answer per-address queries; that needs an index. TestnetScan combines an ElectrumX server (the address/scripthash index) with Core JSON-RPC (everything else) and assembles the exact JSON shapes Esplora and mempool.space return. Monero is a different privacy model (no addresses, stealth outputs, ring signatures), so its lane is a separate monerod-RPC data layer with no Esplora API.

• Explorer UI: home (fee tiers, difficulty/hashrate, retarget, mempool, latest blocks + txs), blocks, block + paginated txs, transaction detail (witness/script stack, fee rate, RBF/CPFP, spent status, OP_RETURN decode), address, mempool, search, tools.
• Esplora API at /{coin}/{net}/api/... (BTC + LTC): blocks, tx (with vin.prevout), address, scripthash, mempool, fee estimates, POST /tx broadcast. See /docs.
• MWEB (Litecoin): per-block peg-in/peg-out + supply from litecoind RPC, plus an optional self-contained SQLite peg index for a supply chart, full peg history and /api/mweb/{tip,block,blocks,pegins,pegouts,supply}.
• Monero lane: home (difficulty, hashrate, emission stats), blocks, transactions with ring-member resolution + ring-age time scale + tx_extra + RingCT type, mempool, and tools (broadcast, key-image status, output lookup). View-key output decode runs locally (CryptoNote ed25519 via ext-sodium); prove-payment (check tx key / verify tx proof) is available when a monero-wallet-rpc is configured - see DEPLOY.md §8.
• /status dashboard (every lane's node + index health) and a generated /sitemap.xml.
• PWA (offline shell), JSON-LD, dark/light theme, permissive CORS, strict CSP.

• PHP 8.x with pdo_sqlite, curl, hash, and sockets/OpenSSL (for the Electrum client). ext-sodium is required for the Monero view-key decode / prove-payment tools (ships in PHP core since 7.2; those tools hide themselves if it is somehow absent) - optional for a BTC/LTC-only deploy.
• bitcoind (testnet4) / litecoind (testnet) with txindex=1; monerod (testnet / stagenet), unpruned, unrestricted RPC on localhost.
• spesmilo/ElectrumX for both Bitcoin (COIN=Bitcoin NET=testnet4) and Litecoin (COIN=Litecoin NET=testnet) - the Rust electrs-ltc panics on MWEB blocks. See DEPLOY.md.

cp config.example.php config.php   # edit RPC + electrum endpoints per network
# point Apache at this directory (AllowOverride All so .htaccess applies)
./deploy.sh ubuntu@host /var/www/testnetscan.com   # rsync + php -l + reload php-fpm

Verify: curl https://your-host/btc-testnet4/api/blocks/tip/height and open /status. Full setup (nodes, ElectrumX, monerod, MWEB seed, vhost, Cloudflare) is in DEPLOY.md.

The /ltc-testnet/mweb page works RPC-only out of the box (current supply + recent blocks). For the supply chart and full peg history, seed a self-contained SQLite index once from an mwebscan dataset (php tools/mweb-seed.php ltc-testnet <db>), enable mweb.index in config.php, and keep it fresh with tools/mweb-index.php on a timer. The index is a pure accelerator - reads fall back to live RPC when it is absent or stale.

Amounts are integer satoshis. text/plain for /tx/:txid/hex, /block/:hash/header, /blocks/tip/{height,hash}, and POST /tx. /v1/fees/recommended is the mempool.space extension; /fee-estimates is vanilla Esplora. Monero lanes have no Esplora API by design. Full list at /docs.

AGPL-3.0-or-later. TestnetScan is a hosted network service, so the AGPL §13 network-use clause applies: the running site links to its source in the footer.

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