As a developer, what is my perspective? Real-time EVM and BitVM combination

@BitlayerLabs In the competitive landscape of L2 solutions, #Bitlayer chose the structure of 'Real-time EVM + BitVM', attempting to meet both the seemingly conflicting goals of developer-friendliness and extreme security. As a developer, this combination is worth a deep dive, as it is not just a technical stack but also a strategic product positioning.

🦉 Why EVM compatibility?

1. Reducing developer migration costs

EVM compatibility means that your existing Solidity and Vyper smart contracts can be moved to Bitlayer with almost zero modifications.

Existing contracts can be directly deployed: no need to rewrite, shortening the time to market.

Familiar development models: tools like Truffle, Hardhat, Foundry, etc., can be directly reused.

Existing audit results can be reused: already audited contracts can reduce security verification costs on L2.

2. Toolchain and ecosystem extension

EVM has formed a complete ecosystem for development, testing, deployment, and monitoring:

- Development tools: Hardhat, Foundry, Remix

Analysis and monitoring: Etherscan, Tenderly

Infrastructure: Infura, Alchemy, The Graph

These do not need to be rebuilt due to chain changes, representing a huge saving of time and resources for the team.

🦉 BitVM's security design philosophy

BitVM provides the native security of Bitcoin, to put it simply:

EVM is responsible for 'running the logic', like the main processor of an application.

BitVM acts as the 'judge + arbitration court', using Bitcoin's challenge verification mechanism to ensure the authenticity and finality of the results.

1. Challenge period and fraud proof

BitVM adopts a model similar to Optimistic Rollup:

The execution result will be submitted to Bitcoin L1 as a commitment.

During the challenge period, anyone can question the result and trigger step-by-step verification.

If fraud is detected, the erroneous party will be punished and the transaction will be rolled back.

2. Security layer and Data Availability (DA Layer)

BitVM combines with external DA Layer to ensure that the transaction data executed off-chain can be verified at any time, avoiding the risk of 'no data to verify'.