Introduction to Blockchain Bridges and Layer-Two Networks
Different blockchains operate independently. Bridges connect networks and transfer tokens, while Layer-Two networks provide additional processing capacity. Users should compare costs and security before using them.
Why Blockchain Bridges Are Needed
Bitcoin, Ethereum, and other blockchains are not the same ledger, and activity on separate networks cannot be assumed to interoperate directly. Blockchain bridges provide a way to connect these networks so users can transfer tokens or information between them. Understanding the origin and destination of a cross-chain operation is essential before using a related application.
The Relationship Between Layer-One and Layer-Two
The lesson compares a Layer-One network to a foundational road and a Layer-Two network to additional transport infrastructure built on top of it. Layer-Two networks are designed to distribute activity, improve processing efficiency, and reduce usage costs. Users can bridge into different networks, but routes may vary in time, fees, and technical requirements and should be compared according to the specific goal.
Convenient Access Does Not Replace Research
Blockchain bridges remain a technology that requires careful research, and not every bridge is secure. The lesson uses a route aggregation service to show how origin networks, destination networks, and tokens can be compared, but providing route options does not eliminate risk. Before acting, users should identify the bridge and destination network rather than authorizing a transaction merely because the interface is convenient or the fee is low.
Original Tutorial
https://learn.metamask.io/zh-CN/lessons/bridging-blockchain-networks
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