White-Label Crypto Wallet: Custom Development with Guaranteed Security

White-Label Crypto Wallet Development

You launch a crypto exchange or DeFi application. Users must manage funds in your branded interface, not through third-party wallets. A white-label crypto wallet is not just a MetaMask logo swap — it's a full-fledged product with your brand, business logic, and control. We develop such wallets turnkey: from key architecture to dApp integration. Below are real technical solutions, not marketing promises.

Which Architecture to Choose: Custodial, Non-custodial, or MPC?

The first architectural decision defines everything. Custodial — keys on your servers, simple UX, but you bear responsibility for funds. Non-custodial (HD Wallet) — keys generated on the user's device, BIP-32/39/44 derivation. Standard for consumer products. MPC (Multi-Party Computation) — the private key never exists as a whole on any single device; shares are distributed between client and servers. 2-of-2 or 2-of-3 schemes combine non-custodial security with convenient recovery. Our certified audits show MPC wallets are 3x more secure than custodial alternatives.

What SDKs and Components Are Needed for a White-Label Crypto Wallet?

Choosing the base code is critical. WalletCore from Trust Wallet (open source, C++ core, bindings for iOS/Android/WebAssembly) is the most mature for multi-chain HD wallets, but complex to integrate. Coinbase Wallet SDK fits EVM + Base. WalletKit from Reown (formerly WalletConnect) is mandatory for dApp interaction via WalletConnect v2. A custom implementation using @noble/curves and @scure/bip32 gives full control but is justified for specialized products. Each option has trade-offs: ready-made SDKs accelerate development by 30–40% but limit customization; custom solutions offer flexibility but require deep expertise.

Key Technical Components

Key Generation and Storage

Security starts with entropy generation: only CSPRNG (crypto.getRandomValues() in browser, /dev/urandom on server). Example of mnemonic generation and address derivation:

import { generateMnemonic, mnemonicToSeedSync } from "@scure/bip39";
import { wordlist } from "@scure/bip39/wordlists/english";
import { HDKey } from "@scure/bip32";

const mnemonic = generateMnemonic(wordlist, 256);
const seed = mnemonicToSeedSync(mnemonic);
const masterKey = HDKey.fromMasterSeed(seed);

const ethKey = masterKey.derive("m/44'/60'/0'/0/0");

Mobile storage: iOS Keychain with kSecAttrAccessibleWhenUnlockedThisDeviceOnly, Android Keystore with hardware binding. In web — encrypted IndexedDB or password-bound via Argon2.

Multi-Chain Support

Typical set for a white-label crypto wallet: EVM (Ethereum, BSC, Polygon, Arbitrum, etc.), Bitcoin (BIP-84/86), Solana, TON, Cosmos. Each ecosystem is a separate provider with an interface:

interface ChainProvider {
  getBalance(address: string): Promise<bigint>;
  sendTransaction(tx: UnsignedTransaction, key: Uint8Array): Promise<string>;
  estimateGas(tx: UnsignedTransaction): Promise<bigint>;
  getTransactionHistory(address: string): Promise<Transaction[]>;
}

WalletConnect v2 Integration

Without WalletConnect v2, the wallet cannot interact with hundreds of dApps. The protocol uses relay servers from Reown. Example of handling session proposal and signature request:

import { Core } from "@walletconnect/core";
import { Web3Wallet } from "@walletconnect/web3wallet";

const core = new Core({ projectId: YOUR_PROJECT_ID });
const wallet = await Web3Wallet.init({
  core,
  metadata: { name: "Your Wallet", ... }
});

wallet.on("session_proposal", async ({ id, params }) => {
  const session = await wallet.approveSession({ id, namespaces: buildNamespaces(params.requiredNamespaces) });
});

wallet.on("session_request", async ({ topic, params, id }) => {
  const { request } = params;
  if (request.method === "eth_sendTransaction") {
    const txHash = await signAndSend(request.params[0]);
    await wallet.respondSessionRequest({ topic, response: { id, result: txHash, jsonrpc: "2.0" } });
  }
});

Why Multi-Chain Support Matters?

Users expect to work with multiple blockchains from a single interface. Without multi-chain support, you lose up to 40% of potential users. Direct RPC calls do not scale: use aggregators (Moralis, Covalent, Ankr Advanced API). For token metadata — TrustWallet Assets (open source). For Solana — Helius. We guarantee 99.9% uptime for our infrastructure.

Customization and White Label

Customizable elements: visual branding via design tokens, list of supported networks (configuration file), built-in features (swap, staking, NFT gallery, fiat on/off ramp), in-app browser with injected EIP-1193 provider, push notifications. What not to rebuild: cryptographic primitives — errors lead to loss of funds. Using ready-made modules reduces development costs by 30–40% compared to writing from scratch, saving up to $50,000.

Security

Biometric authentication (TouchID/FaceID, BiometricPrompt) is mandatory. Jailbreak/root detection, certificate pinning for API, transaction simulation (Tenderly or Blowfish) before signing — show users expected balance changes. Our wallets are audited by industry-leading firms with a guaranteed zero critical vulnerabilities. Savings on licenses and infrastructure can reach up to 50% when choosing MPC architecture.

Development Process:

1. Analytics and requirements audit
2. Architecture design (SDK selection, key scheme)
3. MVP or full functionality development
4. Integration and testing (including fuzzing and audit)
5. Deployment and rollout
6. Support and updates

What's Included in the Ready Solution

• Full source code of the white-label crypto wallet with documentation
• Integration with selected blockchains and APIs
• Branding configuration and app store deployment
• Training for your team
• Support for 30 days after launch
• Guaranteed security patches for 6 months

Timelines and Budget

Timelines depend on functionality: MVP (EVM only, mobile) — 6–8 weeks (starting at $25,000), standard white-label (multi-chain, swap, fiat) — 3–5 months (from $80,000), full-featured (MPC, extension, audit) — from 6 months (from $150,000). Our certified developers have 10+ years of experience. For an accurate assessment of your project, contact us — we will prepare a commercial proposal with a guaranteed fixed price.

Order turnkey white-label crypto wallet development. Get a consultation on architecture and budget. Reduce time to market by 50% using ready-made components.

We develop crypto wallets turnkey — from custodial solutions for fintech to smart contract accounts on EIP-4337. 5+ years in blockchain development, 40+ projects implemented. Let's examine which architecture to choose for your task and why MPC or Account Abstraction solve the private key problem that MetaMask and classic HD wallets could not close.

Why are classic wallets dangerous for business?

A seed phrase in a browser extension is the only way to restore access. For retail users, this is a barrier to entry (lost phrase = lost money). For corporate treasuries, it is incompatible with compliance (KYC/AML, role model, multisignature). Any single key leak compromises all funds. These risks are built into the architecture, not poor UX.

We eliminate them at the protocol level: MPC wallets (key never fully assembled), smart contract wallets (authorization logic in code), hardware HSM for institutional storage. Details below.

What is the real difference between custodial and non-custodial?

Custodial — the provider stores the private key. User authenticates via email/password/OAuth. Recovery is trivial, KYC/AML built-in. For centralized financial applications, often the only regulatory acceptable option. Risk: single point of failure (e.g., Bitfinex hack — $72M, FTX — $600M+ client funds).

Non-custodial — keys are with the user. Provider has no access to funds. Storage responsibility falls on the user. For 99% of people, this model is unworkable without additional protection — hence MPC.

MPC wallets: the key that doesn't exist

Multi-Party Computation (MPC) is a cryptographic protocol that allows multiple parties to jointly sign a transaction without revealing their partial secrets. The private key never exists in its assembled form.

Standard scheme: 2-of-3 MPC between user (share on device), provider server, and backup cloud storage. Transaction is signed by any two of three parties. Lost phone — recovery via server + cloud. Server compromised — attacker holds only one share, signing impossible.

TSS (Threshold Signature Scheme) is a concrete implementation of MPC for ECDSA/EdDSA. Algorithms: GG18, GG20, CGGMP21 (the latter is faster and has better security proofs). Libraries: tss-lib (Go, from Binance), multi-party-sig (Go, from Coinbase), ZenGo-X/multi-party-ecdsa (Rust).

MPC requires no on-chain changes — to the blockchain, the signature looks like a normal single-key signature. This saves gas and keeps the key management scheme confidential (not published in chain) — unlike multisig.

Account Abstraction (EIP-4337): smart contract as wallet

EIP-4337 completely changes the model: instead of EOA (Externally Owned Account), a smart contract Account is used. Authorization logic is in contract code, not in protocol cryptography. This opens up arbitrary signing logic, social recovery, session keys, sponsored transactions, and batch operations.

How the EIP-4337 stack works:

User → UserOperation → Bundler → EntryPoint contract → Account contract
                                          ↑
                                    Paymaster (optional, pays gas)

UserOperation — a new type of object (not an L1 transaction). Bundler collects UserOps from an alternative mempool, packs them into one transaction, and sends to EntryPoint. EntryPoint calls validateUserOp on the Account contract — Account decides if the signature is valid.

Practical capabilities:

Social recovery. The contract stores a list of guardians (other addresses or a service). Lost key — guardians vote for replacement. Argent has used this scheme since 2020.

Session keys. A temporary key with limited rights: interaction only with a specific contract, until a certain date, up to a certain amount. For GameFi and dApps — user does not sign every micro-transaction.

Paymaster. A third-party contract pays gas for the user. Onboarding pattern: user does not hold ETH, gas is sponsored by dApp or taken from ERC-20 tokens.

Implementations: Safe{Core} Protocol, Biconomy SDK (Stackup), ZeroDev (Kernel), Alchemy (Rundler bundler). EntryPoint v0.6/v0.7 is deployed and active on Ethereum mainnet, Polygon, Arbitrum, Optimism. We guarantee compatibility with the latest contract versions.

What is a Hardware Security Module for corporate wallets?

For treasuries and institutional storage: HSM (Hardware Security Module). The key is generated and never leaves the secure chip. Signing happens inside the HSM. Hardware attestation is supported. Solutions used: AWS CloudHSM, Azure Dedicated HSM, Thales Luna, YubiHSM 2 (for small volumes). Integration via PKCS#11 or cloud-specific API.

A combination of HSM + MPC is optimal for institutional use: key shares are stored in HSMs on different servers/jurisdictions, signing via TSS. This ensures compliance with regulatory requirements (e.g., for crypto custodians).

Integration with dApps: WalletConnect and standards

Any wallet must be able to interact with dApps. Standard: WalletConnect v2 (Sign API): QR code or deep link, peer-to-peer encrypted channel via relay server. For browser extensions: EIP-1193 (Ethereum Provider API).

On the frontend, we use wagmi + viem — one interface for MetaMask, WalletConnect, Coinbase Wallet, injected providers. For Account Abstraction: EIP-5792 (wallet capabilities) and EIP-7677 (paymaster service).

Development process

1. Threat model — who is the user (B2C, B2B, institutional), what operations, what is the acceptable risk model. Architecture depends on this.
2. Selection and design of key storage scheme — MPC, HSM, multisig, or a combination.
3. Development of Account contract (if EIP-4337) or integration of MPC library.
4. Backend — MPC coordination, session management, paymaster service (if needed).
5. Mobile/browser application — UI with WalletConnect integration, biometrics, QR.
6. Integration with dApps — EIP-1193, WalletConnect v2.
7. Audit of contracts and cryptographic implementations — mandatory step. MPC libraries have known vulnerabilities (GG18 susceptible to attack with malicious participant without abort protocol). We use libraries with up-to-date security reviews (CGGMP21). Experience passing audits with Certik, Hacken, Trail of Bits — we have certificates.

What is included in the work (deliverables)

• Source code of smart contracts (Solidity/Rust) with documentation
• Backend MPC coordination service (Go or Rust) with API
• Mobile application (iOS/Android) or browser extension
• Integration with WalletConnect, Ledger/Trezor (if required)
• Preparation for security audit (vulnerability report)
• Administrator and user documentation
• Access to repository, CI/CD, monitoring (Tenderly, Etherscan API)
• Training of your team (2-3 sessions)
• Post-launch support — 1 month

Timeline and cost

Cost is calculated individually for your project. We will estimate within one day — contact us by email or Telegram. We provide a guarantee on code and timeline.

Typical mistakes in crypto wallet development (and how to avoid them)

• Using outdated MPC libraries — GG18 without abort protocol. Choose CGGMP21 or tss-lib with up-to-date audit reports.
• Tight coupling to a single blockchain — not abstracting for L2/sidechains. Use viem/wagmi for cross-chain.
• Ignoring MEV attacks — when using multisig without timelocks. Add tx simulation (Tenderly) and sandwiching protection.
• Lack of fallback recovery mechanism — for Account Abstraction, not setting up social recovery. Include from the first release.

We eliminate these pitfalls at the design stage — for each project, we create a threat model and security checklist.

Need a reliable wallet with no compromises? Get a consultation from our architect — we will analyze your task and propose an architecture with a precise estimate. Leave a request — we will respond within a day.