Decentralized Perpetual Futures: What an On-Chain DEX Is and How It Works

Decentralized perpetual futures let you trade futures without an expiration date directly on a blockchain, without an intermediary exchange. Self-custody and on-chain execution are central features, and the associated responsibilities and risks fall on you.

What are decentralized perpetual futures?

Perpetual futures are futures contracts without an expiration date. You can keep holding a position as long as it is not liquidated. Adding “decentralized” means that a blockchain and smart contracts take the place of an exchange company in holding assets and executing trades.

In other words, decentralized perpetual futures involve trading non-expiring futures with leverage on an on-chain exchange (DEX) built as a decentralized application (dApp). This differs fundamentally from ordinary futures trading, where you entrust funds to a company account.

Key features: self-custody and on-chain processing

• Self-custody: Margin is locked in your own wallet or a smart contract rather than held by an exchange. An exchange company cannot block withdrawals or use your assets at its discretion.
• On-chain processing: Orders, liquidations, and settlement are verified on a blockchain, making the records public and transparent. Processing may incur gas fees, however.
• Non-custodial and permissionless: Many services allow anyone to connect a wallet and gain access without identity verification, although policies differ by service.

How do funding fees work?

Because perpetual futures never expire, they need a mechanism to keep the futures price close to the spot price. That mechanism is the funding rate. At regular intervals, either longs or shorts pay the other side.

• Futures price > spot price, with crowded longs: usually longs pay shorts.
• Futures price < spot price, with crowded shorts: usually shorts pay longs.

Funding is a payment between participants, rather than a fee collected by the exchange. Depending on your direction and holding period, accumulated funding can materially affect profit and loss.

How does it differ from a centralized exchange (CEX)?

For a more detailed comparison, see CEX vs DEX.

Risks to understand

• Smart-contract risk: Bugs or vulnerabilities in the code can result in the loss of deposited funds.
• Oracle and price risk: Distorted price data can cause improper liquidations.
• Your responsibility: If you lose a private key or sign the wrong contract, there is no recovery desk. Be especially careful about scams and phishing.
• Leverage and liquidation: In volatile markets, leverage can increase losses quickly. Setting stop-loss criteria in advance is a safer approach.

This article is an informational explanation, not an investment recommendation. It does not guarantee returns or predict prices. Derivatives can result in the loss of all principal. Understand them thoroughly and make careful decisions under your own responsibility.