Which blockchains can the wallet support?

Bitcoin, Ethereum and EVM-compatible chains, Solana, Tron and others based on your product's needs.

Can the wallet include staking or in-app swaps?

Yes, staking, swap and on/off-ramp features are common additions we build directly into the wallet.

How long does it take to build an MVP wallet?

A focused MVP wallet typically launches in 8–12 weeks; a full-featured multi-chain wallet with swap and staking takes longer.

What is ERC-4337 account abstraction and should our wallet use it?

It's a standard enabling smart-contract wallets with programmable features like gasless transactions and social recovery. It's a strong fit for products prioritizing mainstream, non-crypto-native UX; we help you decide if it fits your specific product.

How do you handle app store review requirements for crypto wallets?

We scope platform-specific policy requirements early in the project timeline, since iOS and Android review processes for crypto wallet apps can otherwise introduce late-stage launch delays.

Can you audit a wallet we already built?

Yes, we perform independent security review of existing wallet codebases, delivering a findings report before you scale user growth or handle significant fund volume.

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Blockchain & Crypto

Cryptocurrency Wallet Development Company

Generic wallet apps rarely fit a specific product's compliance model or user experience needs. Hurain Technologies builds custodial, non-custodial, hybrid and smart-contract (ERC-4337) crypto wallets tailored to exchanges, Web3 platforms, gaming ecosystems and remittance products — with multi-chain support, in-app swap/staking, and full white-label branding.

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Overview

What cryptocurrency wallet development actually involves

The custodial-versus-non-custodial decision is the first and most consequential choice in any wallet build, and it's as much a business and compliance decision as a technical one. Custodial wallets — where you hold keys on behalf of users — offer familiar login-based UX and easier account recovery, but make you responsible for securing those keys and typically bring you into scope for custody-related regulatory obligations. Non-custodial wallets put key control fully in users' hands, removing that custody burden but pushing the historically painful problem of seed-phrase backup and recovery onto users who often aren't equipped to handle it safely.

Account abstraction (ERC-4337) has changed this trade-off meaningfully in the last few years by making smart-contract wallets practical at scale: a user's wallet can enforce spending limits, support social recovery through trusted contacts instead of a seed phrase, and even let a third party sponsor gas fees, all without the user ever custodying a raw private key in the traditional sense. We help clients decide which model — or which hybrid — actually fits their specific compliance posture and target user, rather than defaulting to whichever pattern is currently trending.

The Challenge

Problems we see teams struggling with

Limited wallet options for your product

Off-the-shelf wallets don't match your compliance model, supported assets, or UX requirements.

Custody security and key management

Keys must be secured on-device or on your infrastructure without exposing users to loss.

Multi-chain complexity

Supporting multiple blockchains from one wallet interface multiplies engineering effort.

User recovery and support friction

Seed phrase recovery is user-hostile; social recovery and secure enclave options solve this.

Poor UX driving support ticket volume

Confusing transaction confirmations, unclear gas fee estimates, and cryptic error messages generate a disproportionate share of support load for consumer wallet products.

App store and platform compliance friction

iOS and Android have specific, evolving policies around crypto wallet apps that can delay or block a launch if not planned for early.

Our Approach

How Hurain Technologies solves it

Custodial wallets

You hold keys on secure infrastructure; users get login-based ease of use.

Non-custodial wallets

Users hold their own keys with seed phrase, social recovery, or secure enclave-backed biometrics.

Smart-contract wallets (ERC-4337)

Account abstraction enables gasless transactions, spending limits, and social recovery without sacrificing security.

Multi-chain support

One wallet interface across Bitcoin, Ethereum, EVM chains, Solana, Tron and others.

In-app features

Swap, staking, dApp browser, and WalletConnect integration.

Full white-label branding

Consistent branding across iOS, Android, web and browser extension.

UX research and simplification

Transaction flows and error states designed around what users actually understand, reducing support burden and abandonment.

Technology

Tech stack we work with

Mobile

Swift (iOS)Kotlin (Android)React Native cross-platform

Key Storage

Secure enclave / TEEHSM-backed signingSeed phrase encryption

Chains

BitcoinEthereumEVM chainsSolanaTron

Features

WalletConnectdApp browserSwap aggregationStaking

For non-custodial wallets, key material is generated and stored using the device's secure enclave or Trusted Execution Environment (TEE) — hardware-isolated storage that even the operating system can't directly read — with biometric authentication gating access to signing operations. This means a compromised app process alone can't extract the key; an attacker would need to compromise the secure hardware itself, a meaningfully higher bar.

Multi-chain support is architected around a common transaction-signing abstraction layer rather than bolting on each new chain as a separate code path, which is what lets us add support for an additional blockchain without re-architecting the wallet's core. Swap aggregation and staking features integrate through the same abstraction, pulling routes and yields from multiple providers and presenting the best available option rather than locking users into a single third-party integration.

Use Cases

Where cryptocurrency wallet development gets used

Exchange-branded mobile wallet

A white-label, non-custodial wallet exchanges offer their users, separate from exchange account balances.

Web3 dApp companion wallet

A wallet purpose-built for a specific dApp ecosystem, with deep WalletConnect and dApp-browser integration.

Remittance and payments wallet

A custodial or hybrid wallet optimized for simple send/receive flows in markets where non-custodial UX would be a barrier.

Gaming and NFT wallet

Embedded wallet infrastructure for gaming platforms where players shouldn't need to understand seed phrases to own in-game assets.

Smart-contract (ERC-4337) wallet

Account-abstraction wallets with gasless transactions, spending limits, and social recovery for products prioritizing mainstream UX.

Institutional multi-user wallet

A wallet product with role-based access for teams that need shared, permissioned control rather than a single individual key holder.

Proof

Results we've delivered

Client Result

An exchange needed a branded mobile wallet for their users. Hurain Technologies delivered a multi-chain, non-custodial iOS/Android wallet with biometric security and dApp browser in 14 weeks.

Process

How an engagement runs

1
Wallet model & chain scoping
Decide on custodial/non-custodial/hybrid and specific blockchains.
2
Security architecture
Key storage, encryption, and recovery mechanisms defined.
3
Core wallet development
Native or cross-platform development across target platforms.
4
Feature integration
Swap, staking, dApp browser and other product features.
5
Security testing & QA
Independent security testing before app store submission.
6
Release & maintenance
App store launch plus ongoing SDK and library updates.

Engagement Models

How we structure the work

MVP wallet build

A focused, single-chain or small-multi-chain wallet launched in 8-12 weeks, typically the starting point for a new product.

Full-featured multi-chain wallet

A dedicated pod engagement covering swap, staking, dApp browser, and full white-label branding across iOS, Android, and web.

Security audit of an existing wallet

Independent review of a wallet you've already built or inherited, before a major user-growth push or funding round.

Ongoing SDK and feature retainer

Continued feature development and dependency/SDK maintenance once the wallet is live in app stores.

Pitfalls

Mistakes we see teams make

Defaulting to non-custodial without considering the user base

Non-custodial wallets assume users can safely manage a seed phrase — for many consumer audiences, that assumption alone drives high abandonment and support load.

Underestimating app store review timelines and policies

Crypto wallet apps face specific, sometimes changing platform review requirements that can delay a launch if not scoped early in the project.

Treating multi-chain support as additive, not architectural

Bolting on each new chain as a separate code path instead of a shared abstraction multiplies maintenance cost with every chain added.

Skipping independent security testing before launch

A wallet holding real user funds without independent security review is a materially higher-risk launch than the cost of that review justifies skipping.

Glossary

Key terms explained

ERC-4337 (Account Abstraction): A standard enabling smart-contract wallets with programmable logic — spending limits, social recovery, gasless transactions — without requiring changes to the underlying blockchain protocol.
Secure Enclave / TEE: Hardware-isolated storage on a device used to protect sensitive data like private keys, inaccessible even to a compromised operating system.
Seed phrase: A human-readable sequence of words that encodes a wallet's master private key, used for backup and recovery in non-custodial wallets.
WalletConnect: An open protocol that lets a mobile wallet securely connect to and interact with dApps running in a browser or another device.
Social recovery: A wallet recovery mechanism where trusted contacts or devices can collectively help a user regain access, instead of relying solely on a seed phrase.

FAQ