ZondScan FAQ

ZondScan is the block explorer for the QRL 2.0 network. Use it to search and inspect blocks, transactions, addresses, validators, and smart contracts. It also bundles developer tools, including a contract verifier, an open REST API, a gas tracker, a unit converter, and a testnet faucet.

QRL 2.0 is the next generation of the Quantum Resistant Ledger: a proof of stake, EVM compatible blockchain where every account is protected by post-quantum signatures. Because the execution layer is EVM compatible, smart contracts and familiar Ethereum tooling carry over. The network currently runs as a public testnet; mainnet arrives after the migration from the legacy QRL chain. Read the full introduction in What is QRL 2.0.

Quantum computers running Shor's algorithm are expected to break the elliptic curve signatures (ECDSA) that secure most existing blockchains. QRL 2.0 signs every transaction with ML-DSA-87 (CRYSTALS-Dilithium), a lattice based scheme standardized by NIST in FIPS 204 and designed to withstand both classical and quantum attacks. The legacy QRL chain pioneered post-quantum signing with XMSS (RFC 8391), a stateful hash based scheme; QRL 2.0 adopts ML-DSA-87 for its account model. Learn more in why post-quantum matters.

Paste a transaction hash into the search bar at the top of any page to jump straight to its detail view. The transaction page shows status, block, value in Quanta, gas usage, fees, and the sender and recipient addresses. Transactions that have been broadcast but are still waiting to be mined appear in the pending view, and you can browse recent activity on the transactions page. For a field by field walkthrough, see how to read a transaction.

Use the built in faucet to request free testnet Quanta for any Q-prefixed address. Testnet coins have no monetary value; they exist so you can try transactions, contracts, and tooling without risk. The faucet sends a fixed amount per request with a cooldown between requests for the same address. Step by step instructions are in get testnet Quanta.

No. The ZondScan API is free and requires no signup, key, or authentication. GET endpoints are open to any origin via CORS, so you can call them directly from a browser application. Browse every endpoint and run live requests in the API explorer.

The contracts page lists deployed contracts the indexer has seen, including QRC20 tokens and NFT collections. Each contract address page shows the creation transaction, balance, transaction history, and token transfers. Verified contracts additionally expose their full source code, compiler settings, and ABI, and you can call their view and pure functions directly from the Read tab. Verified contracts also get an AI generated plain language explanation of what the code does.

Open the verify contract page, paste your source code, pick the exact Hyperion (hypc) compiler build you deployed with, and set the same optimizer settings. ZondScan recompiles the source and byte-matches the result against the runtime code on chain. On success the source, ABI, and compiler settings are published on the contract's address page. A full walkthrough from deployment to verification is in deploy and verify a contract.

QRL 2.0 keeps the developer experience of Ethereum: the execution layer, gqrl, comes from the go-ethereum lineage and is fully EVM compatible, and consensus runs on a proof of stake beacon chain (qrysm, a fork of Prysm). The signature layer is where the two chains diverge. Ethereum secures accounts with ECDSA. QRL 2.0 secures them with the post-quantum ML-DSA-87 scheme, uses Q-prefixed addresses, and denominates amounts in Quanta (1 Quanta = 10⁹ Shor = 10¹⁸ Planck); see the unit guide and the converter.

MyQRLWallet, available at qrlwallet.com, is the open source wallet for QRL 2.0. It runs in the browser, with desktop and mobile apps available and a browser extension in preparation. It manages Q-prefixed accounts, sends Quanta and QRC20 tokens, and connects to dApps. Follow the step by step guide to create a wallet.

ZondScan was created by DigitalGuards, a company based in the Netherlands. The explorer is completely open source and its code is available on GitHub at github.com/DigitalGuards/zondscan. You can learn more about DigitalGuards at digitalguards.nl.

For technical support and explorer issues, email [email protected]. For wallet and general inquiries, email [email protected]. You can also join the QRL community on Discord for real time discussion and support. Bug reports and feature requests are welcome as issues on the ZondScan repository.