By the end, you’ll be able to…
- Explain why EVM compatibility does not imply Bitcoin security.
- Map a cross-chain workflow into distinct finality and exit steps.
Three questions to carry into this lesson.
Compatible software can sit on different foundations
EVM compatibility helps applications use familiar contract tooling, but it does not define a chain’s consensus, validator access or withdrawal process. Arc’s documentation describes a permissioned validator set using Malachite, a Tendermint BFT implementation. Base documentation describes deriving its L2 chain from data published to its L1. Neither should be presented as Bitcoin proof-of-work settlement.
A bridge adds a separate transition
A cross-chain action can involve custody, locking, burning, minting, proofs or external messages depending on the design. The exact bridge and asset determine the assumptions. Submission on the starting chain is not automatically usable value at the destination. Identify each state and the evidence that advances the workflow; a single spinner conceals too much for an accountable financial interface.
Evaluate the whole exit route
In a fictional architecture review, list the source chain, destination chain, asset contracts, bridge mechanism, administrative powers, fees and expected waiting conditions. Then remove the usual front end and ask what the authorized human can still verify or recover. A decentralization goal should be expressed as dependencies to reduce, not a claim that a particular deployment has no third parties. This course does not certify a bridge or imply that Arc and Base inherit Bitcoin’s consensus guarantees.
Practice on paper
A product runs the same Solidity interface on two chains. Which conclusions cannot be inferred from that fact alone?
I’ve tried it — show the worked answer
You cannot infer identical consensus, validator openness, finality assumptions, gas behavior, bridge safety or exit availability. Inspect each chain and deployment with its current official specification.
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One idea to take with you
Describe every trust boundary in a cross-chain flow.
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