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Kavushion / Services

WEB3 DEVELOPMENT / FOR PRODUCT BUILDERS

Web3 development services.Give every signature a clear purpose.

Users may connect a wallet and still not understand what they approve. We design dApps around clear permissions and useful ownership or transparency.

Illustrative record comparison: a central record is contrasted with signed, verifiable records shared between parties, subject to review and security checks; not an investment offer.
Illustrative example — verifiable records require review and security checks. Not an investment offer.

BUILT FOR TEAMS THAT BUILD

  • Founders shaping a dApp concept
  • Product teams with existing contracts
  • Brands exploring token-based access

Explore a service scenario

Adjust a few inputs. Use the result to start a scope discussion.

A fit checklist, not investment advice or security certification.

Clarify needs in discovery

Why / needs review

  • Need a shared record?
  • Are independent parties involved?
  • Is a wallet genuinely needed?
  • Ready for specialist risk review?
Model assumptions and limits

A “No” to shared record, independent parties or wallet need favors a centralized database. All four “Yes” answers suggest a limited prototype; otherwise clarify unknowns and review readiness. Legal, privacy, security, cost and usability review is still required.

Your answers stay in this page. Nothing is sent or saved.

PROJECT SCOPE

Does this action need to be on-chain?

Use blockchain when shared ownership or verifiable records solve a user problem. A conventional database may be the better fit.

01 /

dApp & product interfaces

Dashboards, onboarding, and mobile layouts with understandable transaction states and error messages.

02 /

Wallet integration

Connection, network selection, permissions, and rejected transactions for the wallets agreed in scope.

03 /

Smart contract workflows

Contract-to-interface integration, on-chain data, and scoped testnet scenario testing.

HOW WE WORK

Prove the flow on a testnet first.

  1. 01

    Map the product

    Users, use cases, networks, and technical constraints.

  2. 02

    Design the journey

    Prototype onboarding, permissions, and transaction states.

  3. 03

    Build & test

    Implement integrations and testnet scenarios.

  4. 04

    Prepare handover

    Documentation, deployment, and support as agreed.

A transparent scope before mainnet.

SECURITY & BOUNDARIES

A transparent scope before mainnet.

Clarify wallet permissions and test rejected or failed transactions before planning mainnet.

  • Explain wallet permissions and user actions
  • Test failures, wrong networks, and rejected transactions
  • Never ask users to share private keys or seed phrases
  • Agree deployment criteria and responsibilities

Before you start

Do I need an existing smart contract?

You can start with a concept and product flow. We then determine whether you need a new contract or an existing integration.

Is a smart contract audit included?

An independent audit is not automatically included. Review requirements, audit providers, and costs must be agreed in scope.

How are cost and timing estimated?

Estimates depend on flows, networks, wallets, contract readiness, and testing scenarios. Share your brief to discuss a proposal.

Can we start with a prototype or testnet?

We can discuss either as a first phase. Prototypes help assess UX; testnet implementations help test integrations before planning mainnet.

Answers before agreeing on scope

Costs, technical choices and readiness—start with your needs.

How do I know whether our app needs blockchain or just a regular database?

Topic: blockchain vs database for business applications

Start with who needs to verify records and whether one trusted operator can meet the product's requirements. If ordinary accounts, editable data, and centralized control meet user needs, a database with non-wallet login may be the better fit; discuss Web3 where shared verification or ownership serves a concrete purpose.

Explore the related topic

Can you help make wallet connection and transaction approval easier to understand?

Topic: wallet integration services for clear dApp UX

The integration scope can cover wallet connection, network selection, permission explanations, and understandable transaction states. Agree supported wallets and devices first, then test rejection, disconnection, and account changes so the interface offers a sensible next step rather than assuming that every approval succeeds.

Explore the related topic

What should I prepare to get a realistic Web3 development estimate?

Topic: custom Web3 development cost and project scope

Prepare user flows, new or existing contract requirements, networks, wallets, data integrations, and the testing scenarios you need covered. An estimate follows that scope discussion; identify third-party services, independent review, and operational support separately so a limited prototype is not priced or described as a production-ready product.

Explore the related topic

Is development testing the same as an independent smart contract security audit?

Topic: independent smart contract security review vs development testing

Development testing checks agreed behavior and scenarios, while an independent security review is a separate engagement with its own reviewers and coverage. An audit is not automatically included; plan the review provider, cost, and treatment of findings before a mainnet decision, without treating either process as a security guarantee.

Explore the related topic
Explore the other questions

Would blockchain help when several organizations need to share and verify records?

Topic: blockchain for shared records across organizations

Map who writes, reads, verifies, and corrects records, including what ownership must mean within the product. Shared records can justify a blockchain discussion when several parties need verification beyond one operator, but data sources, dispute handling, and change permissions still need explicit requirements rather than assumptions about automatic agreement.

Explore the related topic

Who should hold critical keys, and who is responsible if access is lost?

Topic: dApp private key custody and incident responsibilities

Assign administrative authority, access procedures, and incident owners before implementation, without asking users to share private keys or seed phrases. A disruption plan should identify contacts, escalation, owner-managed backups, and recovery limits; this planning is not a request to place assets or keys in the development team's custody.

Explore the related topic

How can we avoid asking for wallet approvals broader than the user needs?

Topic: minimal wallet approval permissions for dApps

Identify which actions actually need permission and show the recipient, extent, and reason before approval. Where the contract mechanism supports it, discuss narrower approvals and a way to inspect or revoke permissions, while explaining that limiting approval reduces particular exposures rather than removing all risks from the interaction.

Explore the related topic

Can we start with a prototype or testnet before considering mainnet?

Topic: dApp prototype and testnet development services

A prototype can explore onboarding, permissions, and transaction states, while a scoped testnet implementation can exercise integrations. Distinguish designed screens from testnet transactions actually executed, then use the findings to define review needs and next-stage criteria rather than presenting the prototype as automatic proof of mainnet readiness.

Explore the related topic

What should users see when they return from a mobile wallet or need to reconnect?

Topic: mobile dApp wallet reconnect and transaction state UX

Separate disconnected, awaiting signature, submitted, and confirmed states so users do not repeat an action without understanding its status. Test app switching, account changes, and expired sessions on agreed wallets, then inspect available transaction status before offering a retry after reconnection instead of assuming that leaving the app canceled everything.

Explore the related topic

Does wallet login prove someone's identity and authorize every transaction?

Topic: wallet login proof vs transaction permissions

Proving control of a wallet address does not by itself establish a person's identity or authorize every product action. Separate login, application access rights, and transaction approval, and explain the signed message and session duration so users understand the difference between entering the app and approving an on-chain action.

Explore the related topic

How should we decide who can call sensitive smart contract functions?

Topic: smart contract roles and access permission planning

List sensitive functions, the roles allowed to call them, and procedures for changing or removing authority before scoping contract implementation. Include unauthorized calls and role changes in testing, and avoid treating hidden interface buttons as access enforcement because the application display does not replace permission checks in the contract.

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How can we plan personal data without putting everything on a blockchain?

Topic: off-chain personal data planning for Web3 applications

Separate information that genuinely needs on-chain verification from personal details and application data that can remain off-chain. Discuss access, retention, deletion, and identity linkage early, including risks from identifiers or references that connect records; this technical planning is neither a privacy guarantee nor a claim of legal compliance.

Explore the related topic

How should we plan contract changes after people start using the product?

Topic: smart contract upgrade and change governance planning

Decide early whether the contract is intended to remain fixed or use a change mechanism, then document who has authority and how decisions are approved. If upgrades are in scope, plan compatibility checks, data impact, user communication, and failure handling without promising that every change is reversible or risk-free.

Explore the related topic

How do we discuss network fees without promising a fixed gas cost?

Topic: network fee assumptions in dApp project planning

Record the proposed network, contract actions, fee payer, and conditions affecting estimates in the product brief. Separate network fees from development costs, use available estimates at confirmation where applicable, and explain that network conditions and transaction outcomes can affect charges without inventing a fixed gas amount for every user action.

Explore the related topic

How do we show a demo without implying that real transactions have happened?

Topic: dApp mock demo vs real blockchain transactions

Label whether a screen is an illustration, local simulation, or testnet integration, and do not describe sample data as a real transaction result. The service page shows a product-flow illustration rather than a live wallet; any later network-connected stage needs agreed network indicators and transaction-status evidence in its scope.

Explore the related topic

What should a dApp do when a wallet is connected to the wrong network?

Topic: dApp wrong network and chain error handling

Show the required and detected networks, and gate actions that depend on a specific chain until the mismatch is resolved. Where a wallet supports switching, provide a clear request and rejection path, and test unavailable networks and mid-flow changes so users are not shown a misleading success state.

Explore the related topic

What should we monitor once the dApp is used, and who handles problems?

Topic: dApp operational monitoring and support scope

Define needed operational signals, such as service connection failures, unresolved transaction states, and mismatches in interface data. Agree owners, log access, escalation, and support coverage before handover; ongoing monitoring and response are not automatically an unlimited service or a promise that every incident will be detected.

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Can we build an interface for an existing contract and other application data?

Topic: existing smart contract and dApp dashboard integration

Integration can be scoped once network addresses, contract interfaces, required functions, and additional data sources are available for review. Map reads, user actions, refresh needs, and out-of-sync conditions, then agree tests so the dashboard does not present stale or simulated data as the latest on-chain state.

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What should we agree before Web3 handover and deployment planning?

Topic: Web3 deployment readiness and handover planning

Include acceptance criteria, configuration documentation, access ownership, available test results, and review and support responsibilities in the handover plan. Deployment is work only where explicitly agreed in scope; having a plan does not mean contracts are already deployed, audited, or automatically approved for mainnet without a further decision.

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Which failure scenarios should be included in our dApp testing scope?

Topic: dApp edge case and transaction failure testing

Start with rejected signatures, wrong networks, disconnections, invalid inputs, and failed or delayed transactions relevant to the intended system behavior. Add unauthorized roles and repeated actions where applicable, then document actual coverage and results; a scenario list does not prove that every possible condition has been tested.

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Can users undo or recover from every mistaken dApp transaction?

Topic: dApp user error and transaction recovery conditions

Not every action can be undone; recovery options depend on transaction status, network behavior, and capabilities deliberately built into the contract. Distinguish rejection before submission, pending transactions, and confirmed actions in help messages, then explain retry or escalation conditions without promising universal reversal or asking for users' keys.

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How can we help users understand what a wallet signature is for before they approve?

Topic: wallet signature purpose explanation for dApp users

Before opening the wallet request, explain the action, permission recipient, and expected consequences in language suited to the user. Match that explanation to the actual request, test comprehension in the prototype flow, and provide a rejection path; clear wording supports decisions but does not ensure every user understands every risk.

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How should we plan a limited rollout before expanding dApp usage?

Topic: phased dApp rollout and usage limit planning

Agree initial users, enabled features, enforceable usage limits, and conditions for proceeding with or stopping the next stage. The rollout plan should connect testing findings, review requirements, and incident ownership; limited access is not a substitute for security assessment or proof that broader use will proceed without problems.

Explore the related topic

We don't have a smart contract yet; how do we decide what needs to be built?

Topic: smart contract development scope for a new product

Start with product rules, user actions, ownership requirements, and why a particular part needs to be on-chain before defining new contract functions. Separate contract development from interface integration, testing, independent review, and handover planning in the proposal so a scope discussion is not mistaken for an already built or audited contract.

Explore the related topic

What should we check when a dApp relies on wallets, RPC services, or data providers?

Topic: dApp third-party service dependency risk planning

List dependencies, the functions relying on them, service limits, version changes, and external costs that need separate confirmation from development work. Agree handling for outages, delayed data, and alternatives worth testing, while explaining that integration does not give the development team control over a provider's availability or security.

Explore the related topic

Start with the user action, not the token.

Share the user problem and what needs to be verifiable. We will assess whether Web3 fits.

Discuss your productView concept work