WorkLI.FI

A gas-aware cross-chain DEX aggregator routing swaps across 50+ L2s.

Cross-chainDEX aggregator
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Overview

LI.FI is a cross-chain liquidity aggregation platform that enables token swaps across multiple blockchains, routing through bridges and DEXs for best execution.

57Blocks built the routing and integration layer behind it — a gas-aware swap engine, broad chain and DEX coverage, and performance controls that keep cross-chain execution fast and cost-efficient at scale.

What 57Blocks delivered

  Swap routing algorithm

Shortest-path search with gas-cost modeling, supporting both whole and split orders for best-route execution.

  Chain & DEX integrations

Coverage across 50+ L2s, with a structure that accelerates onboarding of new networks.

  Performance & cost controls

Event-driven data refresh and multicall3 batching to cut RPC round-trips and reduce infrastructure load.

Tech stack

Viem Node.js multicall3

Business impact

Reliable best-route execution for cross-chain swaps, including split-route optimization.

Reduced latency and infrastructure load through fewer RPC calls and event-driven updates.

Shortened time-to-support for new chains via a modular integration pattern.

A foundation to extend routing logic and coverage as new ecosystems mature.

Current status

LI.FI continues expanding chain coverage, with 57Blocks supporting ongoing integrations and routing enhancements.

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