FREEBLOCK / CRYPTO WALLETS
DeFi wallet
development
Build a wallet where users manage assets, swap tokens and access DeFi protocols. We design key management, transaction flows and integrations, from the first release to launch.
Web, mobile or a module for your existing product. Estimated against an agreed scope.
01 / PRODUCT CAPABILITIES
Three jobs, one wallet
Start with the operations your audience needs. Each integration includes clear statuses, fees and a path for handling failures.
Keys and access
Design wallet creation, sign-in and recovery. For self-custody, define how the user signs and controls access.
Protocols in the interface
Add swaps, staking or liquidity positions. Show transaction terms before approval and the result after execution.
Transaction controls
Validate the network, asset, permissions and recipient. Handle rejected signatures, insufficient gas and delayed confirmations.
02 / DELIVERY SCOPE
From key management to a working transaction
Define the platform, networks and a limited protocol set for the first release. Extend the product after validating its core workflows.
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Architecture and UX
Define users, custody, recovery, transactions and data sources.
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Wallet and history
Implement assets, balances, transfers, history and clear transaction states.
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DeFi integrations
Connect selected protocols, quotes and transaction construction. Check supported tokens and permissions.
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Testing and handover
Test successful and failed flows, then hand over source code and operating instructions.
03 / ARCHITECTURE
Decisions that shape the wallet
- Who signs transactions
- Custodial and non-custodial models differ in key control and recovery. Choose for the product rather than assuming that every DeFi wallet uses the same model.
- Direct protocol or aggregator
- Compare direct integrations and aggregator APIs by coverage, fees, limits and provider dependency.
- Networks and data freshness
- Plan RPC access, indexing and position updates, including provider outages and network delays.
04 / FREEBLOCK EXPERIENCE
Real projects behind the work
Tokensale is our web-wallet and DeFi-platform project with PancakeSwap and Uniswap integrations. It demonstrates asset, liquidity-pool, farming and staking workflows. We agree key management separately for each new product.
FREEBLOCK / CASE STUDY
Tokensale
Web wallet and DeFi platform
ChallengeAn innovative financial ecosystem for digital asset management. A platform representing a unique solution for managing digital assets, including custodial web wallets for secure storage, a platform for project tokenization, and the execution of various token sales.
What we builtTurnkey website development: Creation of the project concept. Implementation of a unique logo. Landing page design to attract users. Layout development of all website pages for high-quality display on various devices. Dashboard design: Development of a dashboard design for convenient management and monitoring of activity on the…
View case study: Tokensale05 / QUALITY AND LAUNCH
Test the entire transaction flow
A wallet interface does not control external protocols or asset prices. Users need clear terms and risk information.
- Signing and recovery for the chosen custody model.
- Network changes, non-standard tokens and approvals.
- Rejected, duplicate and pending transactions.
- RPC, indexer and protocol API failures.
06 / COST AND TIMING
An estimate for your scope
First we define the initial release and its dependencies. Then we estimate the delivery phases and identify external costs separately.
Platforms and keys
Web or mobile, sign-in, recovery and signing architecture.
Integrations
Networks, protocols, supported operations and data providers.
Launch readiness
Monitoring, tests, auditing and support requirements.
07 / TECHNOLOGY
A stack for your product
Tools are selected for your requirements. Logos and links come from our technology catalogue.
Technologies
Blockchains
08 / FAQ
Before we start
Can you add DeFi to an existing wallet?
Yes. We review signing, frontend and backend architecture, then scope integrations and the changes they require.
Does the wallet have to be non-custodial?
No. We choose the model for your product. Self-custody gives the user control over signing, while custody requires operator infrastructure.
Can you integrate swaps and staking?
Yes, for agreed networks and protocols. We check APIs, fees and supported operations before implementation.
What security checks are included?
Code, transaction and access checks are included in the agreed scope. An independent audit is scoped and estimated separately.
How do you estimate cost and timing?
After an initial discussion, we agree on the first release, supported networks and integrations. We estimate delivery by phase and list external costs separately, including infrastructure, third-party services and an independent audit if required.
What do we receive after launch?
You receive source code, documentation and deployment instructions within the agreed scope. Support, monitoring and future releases can be included in a separate delivery plan.
FREEBLOCK / LET’S TALK
What wallet are you building?
Tell us about users, platforms, networks and transactions. If you already have a wallet, describe the integrations you need.