Crypto wallet development: custody and delivery arranged by one named contact

The custody decision sets the wallet’s operating shape

A wallet’s custody model determines who manages its keys and what responsibilities the product must explain. We place that decision near the start, before interface work or feature estimates make the scope harder to change.

A useful first note records the intended user, the wallet’s central purpose, the key management approach, and the actions required at launch. Add any legal questions already raised by your advisers. These points give design and engineering a considered basis for discussion. If the wallet belongs within a larger application, its boundaries can be coordinated with dApp development and the wider Web3 development work.

For a non-custodial wallet, the brief should describe how users access and manage keys, which actions require confirmation. What recovery expectations the product communicates. A custodial wallet introduces a different operating arrangement because the product manages assets or keys on users’ behalf. Your counsel should check its regulatory classification before launch.

A format chosen around the user’s first task

The delivery format should follow where users need the wallet and what they need to do there. A browser extension, mobile app and Telegram Mini App each create a different product context; the table keeps the decision tied to practical requirements.

A concise format note should also state whether one interface is enough for the initial release. Include what users must see before confirming an action, and what support your team expects after release. Where Telegram forms part of a broader product, coordinate the wallet with Telegram bot and mini app development. A separate phone experience can be considered alongside mobile app development.

What belongs in the first wallet release?

The first release should support the specific chain and transaction journeys required by its intended users. Define those journeys before adding integrations; a compact, understandable flow is more useful than a feature list without clear user tasks.

The release outline can bring together supported assets, send and receive flows, swap requirements, confirmation details, and user-facing transaction states. Keep it close to the design and technical scope so decisions remain consistent. Where wallet functions depend on application logic, align the boundary with smart contract development. If the product also needs a token, coordinate the relevant decisions with token creation and deployment.

For each transfer, record what a user reviews before confirming and what status the wallet communicates afterward. If swaps are required, note the integration work and the user actions involved. Describe multi-chain support by naming the chains and actions expected at launch, rather than treating the label itself as a complete requirement.

The arrangement, in four measured steps

The work moves from product decisions to an agreed build, then through review and release preparation. One named contact at Premium Promotions keeps decisions together and makes the next approval point clear.

1. Establish the product. We discuss the intended users, custody approach and release purpose, then record open questions for your team or counsel.
2. Set the wallet scope. We document the format, chains, transactions, swaps, integrations, backend and monitoring requirements. You confirm the written scope before implementation planning proceeds.
3. Present the design and build plan. You see the proposed user flows and delivery plan at a review point. Nothing is presented as final without your written sign-off.
4. Develop and prepare review materials. Implementation follows the approved scope. We coordinate security review and audit preparation around the agreed architecture and available materials.

The sequence gives your team clear places to decide, rather than requiring every wallet to follow an identical build. A working record notes completed items and what remains for the next release decision.

What stays private, and where the boundaries sit

Your product brief, architecture notes and unresolved decisions stay within the working discussion until you approve their use. The named contact keeps that material discreet, presents proposed flows for review, and records written sign-off before agreed work moves beyond its approval point.

Boundaries

For custodial products, your counsel must assess regulatory classification before launch; our development work does not replace that advice. We prepare wallet materials for security review and audit, while independent reviewers own their conclusions and external distribution decisions remain outside our control.

To make a review useful, have the current product brief, custody decision, target chains, integration requirements and any prior audit materials available. We can organise development and preparation around those inputs, and report completed work alongside open items. If you are discussing an existing wallet, the current architecture and the specific change required will help establish whether the next conversation concerns development or remediation.

A quiet first exchange

A short initial note is enough to begin: identify the custody model under consideration and the first delivery format. Your named contact at Premium Promotions will prepare an initial wallet outline, noting the decisions and integration details needed for a useful planning discussion.

If the model is undecided, say so; we can keep that question open while setting out the product context. Existing architecture notes or counsel feedback may be shared privately when relevant. Nothing needs to be circulated beyond the working discussion before you approve it. A concise note with your custody preference and target format gives the named contact a clear starting point for the next conversation.

How it works

1. Establish the productWe discuss intended users, custody and release purpose, then note open questions for your team or counsel.
2. Set the wallet scopeWe record formats, chains, flows, integrations, backend and monitoring needs for your written confirmation.
3. Present the design and planYou see proposed user flows and the delivery plan at a review point before implementation proceeds.
4. Develop and prepare review materialsThe approved scope guides implementation, security review coordination and audit preparation.