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Overview of Fynd, its design and how to get started.

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What is Fynd?

Fynd is a DeFi route-finding engine built on Tychoarrow-up-right. It finds optimal swap routes across DeFi protocols in real-time and returns solutions you can encode and execute on-chain.

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Own Your Routing

Route APIs are simple, but the tradeoffs are painful: rate limits, network overhead, no transparency, unreliable uptime, and unexplainable slippage. And you can't fix any of it.

Fynd puts you in control:

  1. Real-time market state via Tycho Stream, covering all Tycho-supported protocolsarrow-up-right

  2. 50ms solution times: You choose the balance between routing quality and latency.

  3. Custom algorithms: Plug in your own algorithm or customize the pre-built one. Fynd runs multiple algorithms in parallel and picks the best result.

  4. Vertical scaling: Scale up to meet your speed requirements.

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Key Design Principles

  • Single source of truth: All market data lives in one SharedMarketData structure. A single feed writes to it; all workers read from it. No duplication.

  • Algorithm-agnostic: Built around a pluggable Algorithm trait. Different algorithms use different graph representations and strategies. Multiple algorithms compete in parallel; the best result wins.

  • Performance-first: CPU-bound route finding runs on dedicated OS threads (not the async runtime). Each worker pool has its own task queue for independent backpressure and scaling.

  • Observability built-in: Prometheus metrics, structured logging via tracing, and health endpoints are first-class citizens.

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Supported Chains

  • Ethereum Mainnet

  • Coming soon:

    • Base

    • Unichain

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Supported Protocols

Fynd works with any protocol Tycho supports. See the list of supported protocolsarrow-up-right and supported RFQsarrow-up-right.

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How It Works

  1. TychoFeed connects to Tycho Streams (on-chain protocolsarrow-up-right and RFQsarrow-up-right) and processes market updates (added/removed components and state changes) every block.

  2. SharedMarketData stores all component states, tokens, and gas prices in a single shared structure.

  3. When a solve request arrives via HTTP, the OrderManager fans it out to all worker pools in parallel.

  4. Each Worker Pool runs a specific algorithm. Workers compete to pick up the task, find routes through their local graph, simulate swaps against shared market state, and return ranked results.

  5. The OrderManager collects results, picks the best solution by amount_out_net_gas, and returns it.

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Try it out

Head to the Quickstart to get Fynd running.

NextAPI Specifications

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