Liquidity bridge
Uses pools, solvers, or liquidity providers to deliver assets on the destination chain. Often useful for speed and common stablecoin or ETH routes, but availability depends on liquidity and route design.
Bridge + swap · EVM & L2s
Cross-chain bridge swap with Omniswap
Omniswap is a cross-chain bridge swap aggregator for moving crypto between chains and assets in one routed flow. Compare bridge liquidity, destination swaps, gas, slippage, and timing before you sign.
- Action
- Bridge + swap
- Chains
- EVM + L2s
- Custody
- Self-custody
01 — Overview
What is a cross-chain bridge swap?
A cross-chain bridge swap combines two jobs: moving value from one blockchain to another and changing the asset along the way.
A bridge moves assets or messages between separate blockchain networks. A swap changes one token for another, usually through DEX liquidity. A bridge and swap route can do both in one user flow: for example, send ETH on Ethereum and receive USDC on Base.
The route may bridge first and swap on the destination chain, swap first and bridge a different asset, or use a liquidity bridge that settles the desired destination asset directly. Omniswap should present the route, estimated output, fees, slippage setting, and contracts to review before signing.
02 — How it works
How cross-chain bridge swaps work
A routed cross-chain swap is a quote-driven transaction path across source chain, bridge, destination chain, and sometimes one or more DEX trades.
Routing engines compare available paths from bridges, liquidity networks, and DEX venues. Some routes use lock-and-mint or burn-and-mint bridge designs, where an asset is locked or burned on one chain and represented on another. Other routes use liquidity bridges, where liquidity providers or pools deliver assets on the destination chain.
Aggregation matters because the best route can change with gas prices, bridge liquidity, slippage, token availability, and finality conditions. A quote is a current estimate that can change before execution.
- 1Connect wallet and choose chains
Connect a self-custody wallet, then pick the source chain, destination chain, input asset, and desired output asset. Check that the wallet is on the correct source network before requesting a quote.
- 2Get a routed quote
Omniswap compares bridge, liquidity, and swap paths where available. Review the provider path, expected output, minimum received, estimated time, fees, slippage setting, and destination token.
- 3Approve and sign
If the input token needs approval, approve only the amount you intend to use when supported. Then sign the bridge and swap transaction after checking the contracts and wallet prompt.
- 4Receive on the destination chain
Track the route until settlement. The final asset should arrive on the destination chain after bridge confirmation, liquidity delivery, and any destination-side swap execution.
03 — Networks
Supported chains & assets for bridge and swap routes
Use clear chips for the primary EVM networks and liquid assets users expect to compare before bridging.
Recommended network chips: Ethereum, BNB Chain, Arbitrum, Optimism, Base, and Polygon. Recommended asset chips: ETH, USDC, and USDT.
Publish these as live support only after confirming Omniswap production routing, token lists, liquidity availability, and any jurisdiction or wallet restrictions. If coverage is route-dependent, label the section as available routes instead of universal support.
EthereumBNB ChainArbitrumOptimismBasePolygon
04 — Routes
Bridge and swap aggregator options
Cross-chain routing can involve liquidity bridges, canonical bridges, and aggregators that compare multiple bridge and DEX paths.
Real entities in this market include LI.FI for bridge and DEX aggregation infrastructure, Stargate for cross-chain liquidity transfers, Across for intent-based bridging, deBridge for cross-chain transfers and swaps, and 1inch for DEX aggregation.
Do not describe any listed provider as the best, safest, or preferred route without a dated source and product confirmation. Position Omniswap as the interface that helps users compare available routes, expected output, and route risk before they sign.
Canonical bridge
Uses a chain or rollup's native bridge path. Often preferred for native settlement assumptions, but withdrawals or finality can take longer depending on the network and direction.
Aggregator routing
Compares multiple bridges and DEX paths, then presents a route for the user to review. Aggregation can improve UX, but it also adds routed execution and integration risk.
05 — Security
Bridge risk & safety for cross-chain bridge swap users
Bridges are high-value targets, and self-custody does not remove smart contract, validator, liquidity, or market risk.
A bridge can introduce trust assumptions beyond the source and destination chains. Risk can come from contract bugs, validator or oracle sets, liquidity shortfalls, wrapped-asset design, route execution, phishing, malicious approvals, and fast market movement.
Users should verify the dapp URL, review wallet prompts, inspect approvals, confirm destination chain and token address, and avoid treating any route as without risk. Audits can help evaluate a protocol, but an audit is not proof of safety.
06 — Fees
Fees, gas & time for a cross-chain bridge swap
A cross-chain route can include several cost layers, and the quote can move before the transaction settles.
Expected costs may include source-chain gas, destination-chain gas, bridge or LP fees, aggregator fees, DEX price impact, and slippage. Some routes also require a token approval before the bridge and swap transaction.
Timing depends on chain congestion, bridge design, liquidity, finality, and route execution. Show a live quote timestamp, expected output, minimum received, route steps, estimated time, and a reminder that quotes can expire or update.
Source gasDestination gasBridge / LP feeAggregator feeSlippage
Bridges are high-value targets; verify the app, route, and amount received before signing. Self-custody does not remove smart-contract or liquidity risk.
07 — FAQ
Cross-chain bridge swap FAQ
What is a cross-chain bridge swap?
A cross-chain bridge swap is a transaction flow that moves value from one blockchain to another and changes the asset as part of the route. Instead of manually bridging first and swapping later, a routed interface can quote the full path: source asset, bridge leg, destination swap if needed, estimated output, fees, and slippage. The result is simpler UX, but the route can still carry bridge, liquidity, contract, and market risk.
How is bridging different from swapping?
Bridging moves assets or messages between separate blockchain networks, such as Ethereum to Base. Swapping exchanges one asset for another, such as ETH to USDC, usually through DEX liquidity. A bridge and swap flow combines those actions when the user wants a different asset on a different chain. The important distinction is that the bridge changes the network, while the swap changes the token exposure.
Are cross-chain bridge swaps safe?
They can be useful, but they carry risk. Bridge routes can involve smart contracts, liquidity providers, validators, or oracles, plus destination-chain execution and market movement. A self-custody wallet means you control signing, not that every contract is safe. Review the dapp URL, route provider, token approvals, destination asset, slippage, and wallet prompts before signing. Audits and reputation help with diligence but are not proof of safety.
Which chains are supported?
The intended page should show chips for Ethereum, BNB Chain, Arbitrum, Optimism, Base, and Polygon, with ETH, USDC, and USDT as primary asset examples. Treat those as route targets to verify before launch. Actual availability can depend on connected bridges, token contracts, liquidity, chain status, wallet support, and the direction of the route. If a route is not available, the interface should make that clear before signing.
How long does it take?
Timing depends on the chains, bridge design, liquidity, congestion, and finality requirements. Some liquidity routes may settle quickly when liquidity is available; canonical bridge paths or withdrawals can take longer, especially when a rollup or bridge requires a challenge or finality period. The quote should show an estimated time, but users should treat it as an estimate rather than a fixed settlement deadline.
What fees apply?
A cross-chain swap can include source-chain gas, destination-chain gas, bridge or LP fees, aggregator fees, DEX price impact, and slippage. Some token routes also require a separate approval transaction, which costs gas on the source chain. Fees and output estimates can change as liquidity, gas, and market prices move. Always review the minimum received and the full route before signing.