Overview
Splash is an open-source decentralized exchange protocol on Cardano focused on capital-efficient market-making and advanced trading of Cardano native assets1. The protocol combines several types of automated market maker (AMM) pools with a Temporal Liquidity Book that lets a single order draw from pool liquidity and an off-chain order book at the same time, and it operates under a DAO governed by veSPLASH token holders2.
It is built for three audiences: passive liquidity providers who want to deposit into curated pool curves, active market makers placing limit orders through the order book, and traders who want best-execution routing across all available liquidity. The protocol stack is open source, with smart contracts written in Haskell and Aiken and an off-chain execution engine implemented in Rust3.
Key Features
- Multiple AMM pool curves. Splash supports Constant Product, Weighted (Balancer-style with uneven asset ratios), and Stableswap pools, with Dynamic AMM pools listed as in progress2.
- Temporal Liquidity Book. A hybrid execution layer that matches orders against pool liquidity and the order book in the same transaction, supporting partial fills and combining sources for best price2.
- Open execution engine with identifiable operators. Anyone can run an executor, but every operator must publish an on-chain identity, which constrains MEV behavior and creates a fee market for order processing2.
- veSPLASH vote-escrow governance. Locking SPLASH for up to one year mints non-transferable veSPLASH, granting on-chain voting power, gauge votes over emissions, and weekly protocol-fee distributions paid out in ADA via TWAMM4.
- Three published smart contract audits. Anastasia Labs reviewed the Constant Product and Weighted pool contracts and the Stableswap pool contracts in two separate reports, and TxPipe audited the Vote Escrow (Splash DAO) system5.
What to Expect
Splash exposes a swap interface and a separate orders interface for placing limit orders against the Temporal Liquidity Book. Pool creators can configure custom liquidity provider fees, set different fees for buy and sell sides, or enable dynamic fees that respond to market activity2. Trades are non-custodial: assets remain in user-controlled wallets and the protocol's smart contracts are open source on GitHub for independent review3. Third-party DeFi analytics on Splash's TVL, volume, fees, and revenue are tracked publicly on DefiLlama, which classifies Splash under DEXs on Cardano6. Governance participation is gradual rather than instantaneous: voting weight scales with both the amount locked and the remaining lock duration, so users choosing maximum participation accept reduced liquidity on their SPLASH for up to a year. For broader context on the on-chain trading landscape, see other Cardano DEXs and DEX aggregators in the directory.
