An EVM-compatible hybrid Layer 2 connecting Bitcoin and Ethereum, BOB offers low-cost ETH-gas transactions and seamless BTC liquidity access for DeFi and builders.
BOB is a mainnet EVM Layer 2 built with the OP Stack that connects the Bitcoin and Ethereum ecosystems while using ETH as gas and standard Ethereum tooling. Its primary use cases include bringing BTC liquidity into EVM DeFi, building low-fee payments and gaming apps, and deploying cross-chain dApps that need Bitcoin-aware features with Ethereum composability. For cost/performance, BOB operates in OP Stack ranges: ~2 second block times, sub-cent to a few cents average gas, and hundreds of TPS—well-suited for micro-transactions versus L1.
BOB is unique as a hybrid Bitcoin–Ethereum network: an OP Stack rollup with ETH gas that natively integrates Bitcoin liquidity and primitives into the EVM, letting builders reach BTC users without leaving Ethereum tooling. Compared to other networks, it pairs that Bitcoin focus with OP Stack performance (~2s blocks, <$0.05 average gas, 100s TPS) and competitive on-chain activity, offering faster, cheaper transactions than L1s while remaining fully EVM-compatible.
BOB uses ETH as the gas token for transaction fees. You can obtain ETH by bridging from other chains or purchasing using thirdweb Bridge.
To bridge ETH to BOB, connect your wallet to thirdweb bridge, select your source chain, choose the token you want to bridge, select BOB as the destination, enter the amount, and confirm the transaction. The bridge will handle the cross-chain transfer instantly.
To build on BOB 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 BOB 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 ETH on BOB, ensure your wallet is connected to the BOB network, enter the recipient's address, specify the amount of ETH to send, review the gas fee, and confirm the transaction in your wallet.