A Substrate-based NFT testnet for the Polkadot ecosystem, Opal lets developers trial Unique Network features—nested and refungible tokens, sponsored transactions, and low-cost UNQ transfers.
Opal testnet by Unique is the public UNQ-powered environment where developers validate NFT-native and cross-chain features of Unique Network before mainnet, including bridge flows, marketplaces, and gaming assets. It supports advanced asset primitives (nested NFTs, refungible tokens, bundles, on-chain royalties), EVM + Substrate compatibility, and sponsored/signless transactions for near‑zero user fees. Performance is tuned for low-cost transactions and fast blocks (Polkadot-style ~6s) with high throughput; check the Opal explorer/telemetry for current averages on fees, TPS, block speed, and network activity.
Opal is unique because it is NFT-native at the protocol level—offering primitives like RFTs, nested/bundled NFTs, and collection-level permissions that most EVM-only testnets can’t provide without heavy contracts. It blends Substrate robustness with EVM compatibility (ERC‑721/1155 mapping), cross-chain XCM, and fee sponsorship/account abstraction to deliver predictable, near‑zero gas, fast finality, and high throughput for asset-heavy dApps. Live metrics (avg transaction cost, block time, TPS, and activity) are published via Opal telemetry to benchmark against other testnets.
Opal testnet by Unique uses UNQ as the gas token for transaction fees. You can obtain UNQ by bridging from other chains or purchasing using thirdweb Bridge, or through faucets (for testnet).
To bridge UNQ to Opal testnet by Unique, connect your wallet to thirdweb bridge, select your source chain, choose the token you want to bridge, select Opal testnet by Unique as the destination, enter the amount, and confirm the transaction. The bridge will handle the cross-chain transfer instantly.
To build on Opal testnet by Unique you can use thirdweb, which provides an easy way to build, monetize and scale your apps, games or agents. You can find detailed guides and documentation on https://portal.thirdweb.com to get started quickly.
To add Opal testnet by Unique to your wallet, you can connect your wallet and click on [Add to Wallet] button at the top of the page. Alternatively, you can add the network manually using the RPC URL and chain details and add it to your wallet's network settings.
To send UNQ on Opal testnet by Unique, ensure your wallet is connected to the Opal testnet by Unique network, enter the recipient's address, specify the amount of UNQ to send, review the gas fee, and confirm the transaction in your wallet.