eUTxO In the Wild
From DEXes to governance, eUTxO powers real applications across multiple chains.
Decentralized Exchanges
Order-book and AMM DEXes leverage UTxO parallelism for batched order processing. Swap outcomes are deterministic before submission, though batcher-mediated ordering shifts MEV concerns rather than removing them.
Governance & Voting
Cardano governance (CIP-1694) tracks votes as on-chain voting procedures submitted by registered DReps, stake-pool operators and the Constitutional Committee. Certificates handle DRep and CC registration, updates and vote delegation. Application-level DAO frameworks like Agora model proposals as eUTxO state machines: the proposal lives in a UTxO whose datum tracks its status and vote tallies. A voting transaction consumes that UTxO and creates the updated one, with a redeemer naming the action (for example “vote”), while the voter’s authority comes from the transaction’s signatures or the tokens it spends.
Native Tokens & NFTs
On Cardano (and on Ergo), custom tokens are a native ledger primitive rather than a smart contract pattern like ERC-20. They live directly in UTXOs alongside ada, which keeps them cheap to transfer and means their accounting can’t be corrupted by application bugs; supply is controlled solely by each token’s minting policy.
State Machines
eUTxO naturally models state machines: datum = state, redeemer = input, validator = transition function.
Chains Using Extended UTxO
Cardano: the flagship with Plutus/Aiken. Ergo: UTxO + Sigma protocols. Nervos CKB: the Cell Model. The paradigm is growing beyond a single chain.
State Machine Visualizer
eUTxO contracts are natural state machines. Click actions to transition states and see how the datum changes.
state: Locked
remainingAmount: 100
beneficiary: "alice"
deadline: 1000
}
Three quick questions
Optional. Score 3/3 to earn mastery badges. Your first attempt counts for the Polymath badge. Questions and answer order are randomised on every attempt.
