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How to bridge & swap on B² Network | B² bridge
B² Network brings DeFi to Bitcoin, and getting your assets onto this Bitcoin L2 takes just a few clicks. Here's how the B² swap works, what tokens you can move, and why fees stay low.
Updates
Numbers
Proven performance
TL;DR
Key takeaways
Symbiosis now connects B² Network with native Bitcoin and 30+ EVM and non-EVM chains.
B² Network is a Bitcoin Layer-2 using ZK proofs and rollups to run smart contracts.
Bridge to B² in a few clicks: pick B² as destination, choose asset, connect wallet, confirm.
B²'s EVM compatibility lets developers deploy Ethereum dApps on Bitcoin's L2.
The integration supports both BTC and ETH addresses, helping grow Bitcoin DeFi.
1 minute reading
Updates
Symbiosis integrates B² Network
Today, we are integrating B² Network into Symbiosis, another step toward an omnichain future. This integration connects B2 Network with the Native Bitcoin blockchain and 30+ EVM and non-EVM networks within Symbiosis WebApp, supporting the growth of the Bitcoin DeFi.
What is B² Network?
B² Network is a Layer-2 solution designed to bring a new level of functionality to Bitcoin by enhancing transaction speeds and expanding application possibilities. By leveraging zero-knowledge proof (ZK) technology and rollup architecture, B² offers a platform capable of running Turing-complete smart contracts while maintaining Bitcoin’s unparalleled security.
This integration connects Symbiosis and B² solutions, where DeFi apps, NFTs, and other applications can run, further expanding Bitcoin’s utility.
Why integrate B² Network to Symbiosis?
Expand Cross-Chain Capabilities
Adding B² Network support to Symbiosis provides cross-chain transactions, connecting B² with over 30+ networks. This enables liquidity transfer between Bitcoin and other blockchain ecosystems, adding new options for users from both sides.Make Bitcoin’s Utility Become More Accessible
B² Network’s EVM compatibility allows developers to deploy or migrate Ethereum-based dApps onto Bitcoin’s secure Layer-2, expanding Bitcoin’s role beyond payments or investments. This integration adds new opportunities for Symbiosis as a cross-chain hub by fostering Bitcoin-based services to the DeFi field.Align with Security and Efficiency
B² Network brings zero-knowledge proof technology, ensuring privacy and security for transactions. Its EVM compatibility facilitates integration with decentralized applications, supporting both BTC and ETH addresses for improved usability. This combination of security, accessibility, and efficiency complements Symbiosis' mission to provide a robust and scalable cross-chain liquidity solution.
How to access the B² Network via Symbiosis?
Getting started with B² on Symbiosis is simple:
Visit the Symbiosis WebApp and select B² as your destination chain.
Choose the network and asset you wish to swap or bridge to B².
Input the necessary amount, connect your wallet and send the transaction.
Review the transaction details, and once confirmed, your assets will be transferred to B² securely and swiftly.
The impact of B² Network on Symbiosis
With this integration, Symbiosis continues its mission of providing an omnichain experience, expanding its reach into the Bitcoin ecosystem.
By integrating B², we take a bold step toward a future where Bitcoin is more than just a digital asset — it becomes a dynamic platform for the next wave of decentralized applications.
Join the movement
We welcome B² Network to the Symbiosis protocol’s ecosystem, and we invite you to explore this new addition. This is also a call to developers to explore the Bitcoin DeFi opportunities, using the advanced tools and platforms offered by B² to create, innovate, and contribute to the decentralized future.
Be sure to check out our Discord and Telegram communities to stay updated with the latest features and developments in Symbiosis.
Board Member
FAQs
Got questions?
Still have questions? Contact us and we’ll help you out.
01
What is the difference between swapping and bridging?
Bridging moves the same asset across chains (e.g., BTC from Bitcoin to B²), while swapping exchanges one asset for another. On Symbiosis you can do both in one transaction — pick B² as your destination chain and the network and asset you want to receive.
02
Which chains and assets can I bridge to B²?
Via Symbiosis you can bridge to B² from Native Bitcoin plus 30+ EVM and non-EVM networks. The official B² bridge connects a BTC mainnet address to B² mainnet, and third-party routes like Meson and Mini Bridge handle EVM assets such as ETH or stablecoins.
03
What is B² Network?
B² Network is a Bitcoin Layer-2 that uses zero-knowledge proofs and rollup architecture to run Turing-complete smart contracts while inheriting Bitcoin's security. It brings DeFi, NFTs, and EVM-compatible dApps to Bitcoin.
04
How long does a B² bridge transaction take?
The official B² bridge waits for 6 confirmations on Bitcoin mainnet, so total time is typically 1–2 hours before funds appear on B² mainnet. Routes through Symbiosis vary depending on the source chain.
05
What fees do I pay when bridging to B²?
Using the official bridge from BTC, you pay standard Bitcoin network fees (fee rates like 1–3 sat/vB). EVM routes charge gas plus a small bridging fee — around 0.00003–0.00004 BTC (~$3) for Meson, or 0.0005 ETH (~$1.5) for Mini Bridge.
06
Can I bridge assets back from B² to Bitcoin?
Per the B² documentation, the withdraw function on the official bridge is not yet available — you can currently only bridge in, not out, via that interface. Check Symbiosis for available return routes through other supported networks.
07
Why use B² instead of Bitcoin mainnet directly?
B² is a Bitcoin Layer-2 using rollup-style scaling and zero-knowledge proofs to process hundreds of transactions per second, versus Bitcoin's base layer of ~7 TPS — while still inheriting Bitcoin's security and adding smart contract support.
08
How do I check if my B² bridge transaction succeeded?
Track status via bridge history and the block explorers for both Bitcoin mainnet and B² mainnet. Once both chains show success, your updated balance appears in the connected B² wallet.
Learn more
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