An EVM-compatible Bitcoin Layer 2 testnet using BTC as gas, offering low-cost, fast-finality smart contracts and Ethereum tooling for BTC-native dApp development.
B2 Testnet is the public network for B2 (B²) Network, a Bitcoin Layer 2 that is EVM-compatible and uses BTC as the native gas token. It lets teams deploy Solidity dApps, test BTC-native gas, and trial cross-chain BTC bridging, swaps, and wallet integrations before mainnet. For comparison, live explorer metrics surface avg gas cost (in sats), block time (low-seconds), burst TPS (hundreds), and daily active wallets.
B2 is unique in pairing full EVM tooling with BTC-denominated gas and deep Bitcoin interoperability, giving BTC liquidity direct access to smart contracts. Compared to general EVM L2s, it delivers L2-class performance (low-seconds blocks, hundreds-TPS bursts, negligible BTC gas) while keeping fees in BTC for a native Bitcoin user experience.
B2 Testnet uses BTC as the gas token for transaction fees. You can obtain BTC by bridging from other chains or purchasing using thirdweb Bridge, or through faucets (for testnet).
To bridge BTC to B2 Testnet, connect your wallet to thirdweb bridge, select your source chain, choose the token you want to bridge, select B2 Testnet as the destination, enter the amount, and confirm the transaction. The bridge will handle the cross-chain transfer instantly.
To build on B2 Testnet 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 B2 Testnet 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 BTC on B2 Testnet, ensure your wallet is connected to the B2 Testnet network, enter the recipient's address, specify the amount of BTC to send, review the gas fee, and confirm the transaction in your wallet.