How to Build an Intent-Based DEX Aggregator With Solver and Filler Networks

Instead, it changes where execution happens and who competes for the opportunity.

An aggregator should therefore consider:

• Private order flow
• Batch auctions
• Uniform clearing prices
• Private transaction relays
• RFQ execution
• Commit/reveal mechanisms where appropriate
• Solver competition
• Transaction simulation before submission

CoW's batch-auction design specifically attempts to reduce transaction-order dependence and MEV through uniform directed clearing prices.

The broader MEV lesson is straightforward: the more valuable and time-sensitive the transaction, the more important it is to control how order flow reaches block builders and searchers.

Add Cross-Chain Intents Instead of Building Another Bridge

A next-generation aggregator should not force users through:

Approve → Bridge → Wait → Switch network → Swap → Confirm

Instead, the user should be able to express:

“I want 5,000 USDC on Base.”

The solver determines whether the optimal fulfillment requires a DEX, cross-chain liquidity provider, bridge rail, stablecoin transfer mechanism, or private inventory.

This is where intent-based architecture becomes particularly powerful. The user cares about the destination state, while the solver handles the execution path.