Overview
Rialto is an onchain swap router. It takes a sell token, a buy token, and an amount, finds the best available execution across the liquidity sources it supports, and returns a ready-to-send transaction that settles the trade atomically onchain. Rialto’s defining liquidity source are propAMMs: onchain market makers that quote a price from their own logic and inventory rather than from a passive constant-product pool. Rialto quotes every candidate source onchain at request time, ranks routes by output net of gas, and settles the winning route through the RialtoRouter settlement contract. propAMMs compete alongside conventional DEX pools on every quote, so takers get the best price without choosing a venue.Two ways to integrate
There are two distinct developer integrations, covered as separate tracks in this section:- Swap API. For wallets, frontends, and other routers that want to use Rialto as an execution venue. You request a quote and submit the transaction Rialto returns. You never build route calldata, fee logic, slippage math, Permit2 witnesses, or settlement actions yourself.
- propAMM integration. For onchain market makers that want to list liquidity on Rialto. You deploy a pair contract that exposes a quote function and an atomic settlement function, and Rialto routes order flow to it when it wins.
Choosing a track
- To let users trade through your app, use the Swap API.
- To provide liquidity and receive order flow, integrate as a propAMM source.