Base: What It Is and How Bridging Works
Base uses the same account format as Ethereum, but balances live on separate networks. Moving value between them requires a bridge rather than a normal same-chain transfer.
Key idea
The same-looking address does not mean the asset is on the same chain. Always verify the network before sending or bridging.
In this guide
Related workflow
Base Tools →Same key, separate network state
An Ethereum wallet can use the same address on Base because both use the EVM account model. The balances and transaction histories on those networks remain separate.
Bridge versus swap
A swap changes one asset into another on a network. A bridge moves value between networks, sometimes with an asset conversion as part of the route.
Confirm the destination
Before approving, check the destination network, recipient and quoted amount. A valid address can exist on several EVM networks while the funds arrive only on the one selected.
Concept map · schematic
Execution and Ethereum settlement
A conceptual rollup lifecycle; actual guarantees vary by network.
- 01
Layer 2
Orders and executes transactions on its own chain
- 02
Publish data
Posts commitments and data through L1 transactions or blobs
- 03
Settlement
Applies proof/challenge rules to secure resulting state
Important: A sequencer confirmation is not identical to final settlement on Ethereum.
Live, read-only fieldwork
Compare observed execution costs
Inspect sample transaction fees from Ethereum and Base; these are not quotes.
Loading sampled transaction fees…
These examples read public network or indexer data only. You cannot execute trades, approve permissions, or submit transactions here.
Primary references
Documentation and standards
References added
Official technical references for further verification. A source link is not a guarantee that every earlier editorial sentence has been reverified; provider specifications may also change over time.
Originally published 2026-09-13 · Guide text last updated 2026-09-19 · Reference links and live examples updated 2026-10-24
- Base protocol and settlement specificationBaseRead source ↗
- Optimistic rollupsethereum.orgRead source ↗
- EIP-4844 blob transactionsEthereum Improvement ProposalsRead source ↗
Learn the fundamentals
Continue in the curriculum
A structured lesson covering the concepts behind this guide.
Put it in context
Tools connected to this topic
Use the concepts above to understand what these tools show or ask you to approve.
Keep going
Related guides
The closest concepts to read next.
Networks & bridging · 4 min
Base Gas Fees, Explained
Base fees are usually lower, not free or constant. Review the estimate before every signed action.
Read next →Networks & bridging · 4 min
Bridge Fees vs. Slippage
Compare input with final received amount first, then use the fee breakdown to explain the difference.
Read next →Networks & bridging · 5 min
Cross-Chain Bridging, Explained
Before signing, verify the source asset, destination chain, recipient and final amount as one complete quote.
Read next →