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Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallStart by defining the trading problem, the users who have it, and why a decentralized venue is the right solution. Then choose the market structure, map the full trading and liquidity experience, and make custody, security, chain, and legal assumptions explicit. Smart contracts implement those decisions; they cannot make an unclear product or market design viable.
How do I plan a DEX product before starting with smart contracts?
Write a product brief that answers one question: What trading problem will this DEX solve for a clearly defined group of users, and why does a decentralized venue serve that need better than existing venues? If the team cannot answer it, contract design is premature.
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Define the user and the job
Choose a primary audience rather than designing for “everyone in crypto.” That might be spot traders in a particular asset set, liquidity providers, token projects in one ecosystem, or professional market participants. Describe what those users need to do, what they use now, and why they might switch.
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Turn possible advantages—such as asset availability, predictable execution, custody, composability, access, or specialized market features—into hypotheses to validate with interviews, prototype tests, or market analysis. Do not assume every DEX user values the same things.
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Choose outcomes to measure
Track whether the product solves the stated job, not just whether its contracts deploy. Candidate measures include successful trade completion, the difference between quoted and executed outcomes, liquidity depth in the target markets, repeat use, and whether users understand fees and price impact. These are planning metrics to select and define for the product, not published industry benchmarks.
Which market structure fits the product?
An automated market maker (AMM) lets traders swap against liquidity held in pools. An order-book DEX organizes buy and sell orders by price and matches them as demand changes. The models create different liquidity mechanics, execution behavior, and user workflows; neither is universally better.
| Decision factor | AMM | Order book |
|---|---|---|
| What the trader interacts with | A pool of assets; the trade changes the pool’s reserves. | Posted buy and sell orders arranged by price. |
| Liquidity design question | Who supplies pool assets, and how are fees and liquidity-provider shares handled? | How are orders submitted, maintained, matched, and displayed? |
| Expected user mental model | Request a swap quote and review its expected outcome. | Enter, inspect, or cancel orders against visible market depth. |
| Product fit to investigate | Whether pooled liquidity works for the target assets and likely trade sizes. | Whether users need posted limit orders and a visible book. |
Evaluate candidate designs against the actual asset market and audience. Ask how liquidity will be bootstrapped and sustained, how trade size and available depth affect execution, and which components must settle on-chain versus rely on data, matching, routing, or indexing services. These are market-specific questions; a market model alone does not establish better liquidity or pricing.
How should liquidity and incentives work?
For a pool-based product, liquidity behavior is part of the user experience, not an implementation detail. Decide:
- Who may create a pool or market, and which assets or token behaviors are allowed.
- How liquidity providers add, remove, and monitor their positions.
- How trading fees are set and distributed.
- How the interface explains expected execution and the risks of supplying liquidity.
Liquidity-provider mechanics can vary even within one AMM family. Uniswap’s documentation, for example, describes fungible pool tokens for v2 and position-based liquidity ranges for v3 and v4. The provider workflow therefore needs to be specified for the chosen design, not inferred from the label “AMM.”
Do not market liquidity provision as guaranteed yield or passive income. No universal return or safe expected yield is established here; explain the risks and mechanics of the actual product instead.
What should the trading journey show before a user signs?
Map the journey from first visit through wallet connection, asset selection, quote review, signing, transaction status, and recovery if a transaction fails or the quote changes. If both first-time users and experienced traders matter, test their workflows separately. Designing only the successful path leaves users without guidance when execution does not go as expected.
Make the trade review decision-useful
Ethereum.org’s DEX design guidance identifies information that may matter before a swap: token price, slippage, minimum received, expected output, price impact, estimated network fee, other fees, and routing. Decide which items the target user needs at the point of decision, and consider placing advanced details in a secondary view rather than overwhelming every user.
Use prototypes to test whether users can tell what they will receive, what minimum amount they may receive, and what price impact, network cost, and fees apply before signing. The interface should distinguish protocol fees from network transaction costs and give users a way to understand why a route or quote changed. Ethereum.org also recommends considering local-currency display: “Users still think in terms of local currencies, so in order to match real world mental models, this should be included.”
How will custody, governance, and trust work?
Describe who controls assets at each stage of the user journey. Decide whether contracts can be upgraded, who can change parameters or pause components, how proposed changes take effect, and what happens during an incident.
Privileged controls need clear limits that users can understand. An immutable design needs an equally clear explanation of how the team could respond to an error or vulnerability if deployed contracts cannot simply be patched. Uniswap describes its core contracts as persistent and non-upgradeable, with permissionless access; those are choices made by that protocol, not requirements for every DEX.
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How do chain and supporting-service choices affect the product?
Build a requirements matrix before choosing a chain. Include the target users and assets, wallet support, expected transaction costs and timing, atomicity and composability needs, developer tooling, market-data access, indexing, and any cross-chain requirements. Chain and architecture choices change the actual workflow: how users sign and submit trades, how the product reports fees and confirmation status, and how it obtains market data.
Official documentation illustrates different possibilities rather than ranking them: Solana describes a workflow in which market data informs a quote and a signed transaction is executed by on-chain programs; XRP Ledger describes a native DEX with both AMMs and on-chain order books. Neither example establishes a best chain for every product.
Decide which parts must be on-chain and which can use a website, indexer, API, quote service, or transaction-delivery provider. Off-chain components may be part of the product architecture: IOSCO’s 2023 report describes an order-book arrangement in which an interface and off-chain order book can sit alongside blockchain settlement. Each service dependency brings reliability, data-quality, and operational requirements that belong in the plan.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What security work belongs in product planning?
Identify the most serious ways the design could harm users and the assumptions behind them. Depending on the product, consider incorrect pricing math, malicious or unusual tokens, faulty fee changes, compromised privileged keys, oracle or external-data failures, front-running or sandwiching, and integration failures. This is a planning checklist, not a claim that every DEX has every exposure.
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When should legal and launch-market diligence start?
Make legal analysis an early workstream, based on the proposed product rather than its DEX label. Record where the team and intended users are located; which assets and services are in scope; who operates the interface and supporting infrastructure; what authority governance retains; whether an intermediary ever holds or handles assets; and how access is offered.
Ask qualified counsel to assess the actual architecture and relevant jurisdictions. IOSCO’s 2023 report discusses varied DeFi arrangements, including AMM pools and order-book designs with off-chain components. It does not establish whether a particular proposed DEX is regulated or provide a universal compliance checklist.
What should be settled before implementation begins?
Move into contract design only when the team can make and explain the core product decisions. A useful implementation-readiness check is whether you have:
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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errors- A defined primary user, trading job, and reason to use a decentralized venue.
- A market-structure choice grounded in the target assets, liquidity plan, and expected user workflow.
- A mapped trade and liquidity-provider journey, including quote review and failure recovery.
- Explicit custody, upgrade, administrative-control, and governance assumptions.
- Chain and service requirements tied to user needs and operational dependencies.
- A design-specific security plan and a legal review workstream for intended launch markets.
These decisions do not eliminate implementation risk. They give the engineering work a product to implement, with user expectations and risk boundaries defined before those choices become embedded in contracts.
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