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Bridge to Merlin Chain — Bitcoin L2 EVM | Symbiosis
Bitcoin was built to hold value, not run apps — until now. Here's how Merlin Chain's ZK rollup and the ChainX foundation unlock real DeFi for BTC, and how to move your assets there in minutes.
Updates
Numbers
Proven performance
TL;DR
Key takeaways
Merlin Chain is a Bitcoin Layer 2 that brings EVM and real DeFi to BTC assets.
Merlin uses ZK-Rollup tech: sequencers post compressed data and ZK proofs to Bitcoin.
Symbiosis now supports Merlin, letting you bridge assets there in minutes.
The integration adds WBTC to the Symbiosis AMM and routes swaps via existing Merlin DEXes.
Symbiosis deployed and tuned its contracts and relayer network on Merlin Chain.
3 minute reading
Updates
Introduction to the Merlin chain
Merlin Chain is a second-layer solution for the Bitcoin blockchain, designed to bridge the gap between Bitcoin and the Ethereum Virtual Machine (EVM) ecosystem. As a native Layer 2 network of the Bitcoin blockchain, Merlin Chain focuses on enhancing the utility and scalability of Bitcoin assets through advanced integration and adaptation techniques.
The network employs ZK-Rollup technology. Sequencer nodes on Merlin Chain produce compressed transaction data and ZK proofs through zkEVM, which are then uploaded to the Bitcoin blockchain via a decentralized Oracle network, ensuring transparency and security.
Strategic expansion
Merlin Chain represents a strategic expansion of the Bitcoin ecosystem, offering users diverse DeFi capabilities and contributing significantly to the overall growth through technological advancements.
Editorial Team
FAQs
Got questions?
Still have questions? Contact us and we’ll help you out.
01
How do you bridge BTC to Merlin Chain?
Symbiosis added WBTC to its AMM DEX and deployed contracts on Merlin, so you select your source chain and token, choose Merlin as the destination, and the relayer network routes the swap on-chain. It settles in minutes.
02
What is Merlin Chain?
Merlin Chain is a Bitcoin Layer 2 that uses a ZK-rollup with zkEVM to batch transactions off-chain, then anchors compressed data and proofs to Bitcoin via Taproot. It brings EVM smart contracts to BTC assets.
03
Is Merlin Chain EVM compatible?
Yes. Merlin is EVM compatible, so developers deploy Solidity contracts and users interact with dApps using familiar EVM wallets and tools — similar to zkSync Era or Polygon zkEVM, but tailored for Bitcoin.
04
How does Merlin's ZK-rollup work on Bitcoin?
Sequencer nodes produce compressed transaction data and ZK validity proofs through zkEVM, then submit them to Bitcoin's Taproot outputs via a decentralized oracle network. Execution happens off-chain while state stays verifiable on Bitcoin.
05
What is the MERL token used for?
MERL is Merlin Chain's native token with a total supply of 2.1 billion. It pays transaction fees, secures the network through staking, handles governance, and acts as collateral and liquidity in Merlin DeFi apps.
06
What are the risks of bridging BTC to Merlin?
Once bridged, your funds are governed by bridge contracts, the sequencer, and the proof system — not Bitcoin's base-layer consensus directly. That adds risks like contract bugs, sequencer downtime, or oracle/proving failures.
07
How does Merlin keep transaction fees low?
It batches many transactions and submits only compressed data and ZK proofs to Bitcoin, cutting L1 data usage. Recursive ZK proof techniques shrink proof size further, so individual L2 transactions cost far less than direct BTC transactions.
08
How does Merlin compare to Stacks as a Bitcoin L2?
Stacks runs separate consensus and the Clarity VM, while Merlin uses a ZK-rollup with EVM compatibility, generating Ethereum-like validity proofs anchored to Bitcoin via Taproot. Merlin lets you reuse Solidity and EVM tooling.
Learn more
Bridge guide
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