What Is a MetaMask Clone Script?
A MetaMask clone script is ready-to-deploy software for a non-custodial Web3 wallet: a browser extension and mobile app that stores keys on the user device, injects a provider so websites can request signatures, connects to dApps over WalletConnect, and lets users swap, bridge and manage token approvals.
The distinction from a general crypto wallet is where the risk sits. A storage wallet mainly has to send and receive correctly. A Web3 wallet asks users to approve arbitrary contract calls written by strangers, which means the interface itself is the last line of defence. For custody models and multi-chain storage, see our crypto wallet development company page.
What You Receive
| Component | What It Covers |
|---|---|
| Browser extension | Chrome, Brave, Firefox and Edge with hardened message passing |
| Mobile apps | iOS and Android with in-app dApp browser, submitted to both stores |
| Provider layer | EIP-1193 injection, WalletConnect v2 pairing and session management |
| Key management | On-device BIP-39 generation, hardware-backed storage, HD accounts |
| Transaction safety | Call decoding, simulation and risk warnings before signature |
| Swap and bridge | Aggregator-routed swaps and cross-chain bridging |
| Approval manager | Token allowance review and one-tap revocation |
| Source code | Extension, apps, backend and infrastructure transfer on delivery |
See a working Web3 wallet with your branding, your default networks and your swap routing.
Get a Free Live DemoThe Signature Screen Is the Whole Security Model
Everything else in a Web3 wallet can be correct and the user can still lose everything in one approval. Malicious dApps do not break cryptography; they present a legitimate-looking request that grants unlimited spending or transfers an asset to an attacker, and the wallet asks the user to confirm it.
Most wallets show a hex blob and a gas estimate. That is not consent, it is a formality. If the interface cannot explain what a transaction will do in plain language, users approve things they would never agree to if they understood them.
Human-readable decoding of contract calls, so a request reads as its actual effect rather than as calldata.
Transaction simulation showing predicted balance changes before signing, including what leaves the wallet.
Approval scope warnings with explicit flags on unlimited allowances and permit signatures.
Domain and contract reputation with phishing and known-malicious address warnings at the point of request.
Signature type clarity so blind off-chain signatures are distinguished from ordinary transactions.
Approval hygiene tooling a standing allowance list with one-tap revocation, not a hidden setting.
We build decoding, simulation and reputation checks into the signing flow as core features. A wallet that cannot tell a user what they are about to approve is transferring risk to the person least equipped to assess it.
Surfaces This Scope Covers
Reference concepts for a wallet build — balance, signing and recovery surfaces. Not screenshots of a delivered client app; store builds are demonstrated on a call.
Core Features
Wallet and Accounts
- On-device BIP-39 generation with hardware-backed storage
- Import by seed phrase, private key or keystore file
- Multiple HD accounts with labels and watch-only addresses
- Custom network addition with chain ID validation
- Token detection, custom token import and spam filtering
- Address book with labels and ENS resolution
- Portfolio view with fiat valuation across networks
Web3 Connectivity
- EIP-1193 provider injection for websites
- WalletConnect v2 pairing, sessions and revocation
- In-app dApp browser on mobile with bookmarks
- Deep link and universal link handling
- Connected site permissions with per-site account scoping
- Network switch requests with explicit user approval
- Signature request decoding for typed data and messages
Transactions and Swaps
- Gas estimation with speed tiers and EIP-1559 fee controls
- Transaction simulation with predicted balance changes
- Speed-up and cancel with nonce management
- Aggregator-routed in-wallet swaps with slippage controls
- Cross-chain bridging with route comparison
- Full history with explorer deep links and status tracking
Security
- Hardware wallet support for Ledger, Trezor and others
- Phishing domain and malicious contract warnings
- Token approval manager with one-tap revocation
- Biometric unlock, auto-lock and app switcher blur
- Screenshot blocking on seed phrase screens
- Jailbreak, root and extension tampering detection
- Certificate pinning and hardened content script isolation
Mapped to a release plan
We will send a prioritized build plan covering platforms, default networks and signing safety features.
Request a Feature PlanHow MetaMask Clone Script Is Put Together
The modules above map onto these layers. Each one ships with its own tests, documentation and runbook, so nothing arrives as a black box you inherit without an explanation.
Requests flow down, settlement and events flow back up. Every boundary carries logging, so a failure is traceable to a layer instead of guessed at.
Chains and Assets We Work With
Every chain is its own implementation: address derivation, fee estimation, transaction construction and signing all differ. Non-EVM support is separate engineering, not a configuration entry.
How We Build Your Wallet
Signing safety and key handling are designed first, because everything else depends on them being right.
Key and signing architecture
Storage model, derivation, signature flows and the decoding and simulation pipeline.
Output → security design document and threat model
Extension development
Content script isolation, provider injection, message passing and permissions.
Output → extension builds for Chrome, Brave, Firefox and Edge
Mobile development
Native apps with dApp browser, WalletConnect and biometric unlock.
Output → iOS and Android builds on internal distribution
Security testing
Penetration testing, dependency review and hostile-dApp scenario testing.
Output → audit report with critical and high findings remediated
Store submission and launch
Extension store review, App Store and Google Play submission, monitoring.
Output → published wallet with release and support runbooks
Networks supported out of the box
Development Timeline
| Scope | Timeline | Includes |
|---|---|---|
| White label Web3 wallet | 4 to 6 weeks | Rebranded extension or app, standard networks |
| Extension plus mobile wallet | 8 to 12 weeks | Both platforms, dApp connectivity, swaps |
| Wallet with full safety layer | 3 to 5 months | Simulation, reputation feeds, approval manager, bridging |
| Wallet with smart accounts | 5 to 8 months | ERC-4337, passkeys, gasless transactions, social recovery |
What extends the timeline: transaction simulation infrastructure, which needs its own node and tracing setup; extension store review, which is separate from app store review; hardware wallet integration per device family; and non-EVM support, which is a separate implementation rather than a config change.
Revenue Models
| Model | How It Works |
|---|---|
| Swap fee or spread | A configurable fee on in-wallet swaps, usually the primary line |
| Bridge fee share | Revenue share on cross-chain routing |
| Aggregator referral revenue | Rebates from the routers you send order flow to |
| Staking commission | A share of staking rewards initiated in-wallet |
| Fiat on-ramp commission | Revenue share from licensed on-ramp partners |
| dApp placement | Sponsored positions in discovery surfaces |
| Enterprise SDK licensing | Licensing your wallet SDK to other products |
Swap quotes are directly comparable across wallets, so fee levels have a visible ceiling. We build the fee engine as configurable per chain and per asset without a release.
Related services
Who This Is For
Shipping a branded wallet as an acquisition channel.
Providing an ecosystem wallet with their chain first.
Offering a self-custody Web3 companion to custodial accounts.
Owning the wallet layer rather than renting it.
Deploying a controlled wallet for internal contract operations.
Serving networks and languages global wallets neglect.
Why Choose Coinsclone
Signing safety as a core feature
Decoding, simulation and reputation checks in the approval flow, because that screen is where users actually lose funds.
Extension security done properly
Isolated content scripts, hardened message passing and tampering detection, not a webview with a wallet in it.
Approval hygiene surfaced
A standing allowance list with one-tap revocation, so stale unlimited approvals do not sit forgotten.
Store and extension review handled
We prepare and manage submissions across app stores and extension stores and answer reviewer queries.
Hardware wallet support built in
Ledger and Trezor signing so high-value users can keep keys offline and still use your interface.
Full source code ownership
Extension, apps, backend and infrastructure transfer to you on delivery.
What Our Clients Say
Operators who launched with us, in their own words. Hover to pause.
A members-only NFT marketplace for Digital Freemasonry
Digital Free MasonryNFT marketplace · delivered and liveNext phase in progress: the ODFT Token and the MasonicVerse platform.
Working with Coinsclone has been one of the best professional experiences I have had in the blockchain industry.
From the very beginning of our NFT Marketplace project until its successful completion, the entire team demonstrated exceptional technical expertise, professionalism, patience, and commitment. Every stage of development was handled with great attention to detail, and every challenge we encountered was approached with a solution-oriented mindset.
Read the full client note
Our project was far from a standard NFT Marketplace. It included custom blockchain architecture, Polygon integration, ERC-721 and ERC-1155 standards, royalty implementation, token-gated access through Masonic Passport, multiple payment methods, marketplace customization, advanced testing, and many unique business requirements. Throughout the entire process, the team consistently delivered high-quality work while maintaining clear communication, transparency, and a strong commitment to excellence.
I would especially like to express my sincere appreciation to Mr. Jeeva, Mr. Bala, Mr. Saravanan, Mr. Veeramani, Mr. Akshay, and the entire development team for their outstanding support, professionalism, responsiveness, and dedication throughout the project. Their technical expertise, patience, and willingness to understand even the most complex business requirements gave us complete confidence during every phase of development.
What impressed me the most was not only their excellent blockchain development skills, but also their ability to understand our vision and transform it into a secure, scalable, and highly professional NFT Marketplace.
For me, Coinsclone is not simply a software development company — they are a trusted long-term technology partner. After successfully completing our NFT Marketplace, we are now preparing to continue our collaboration on the next major phase of the Digital Freemasonry ecosystem, including the development of the ODFT Token and the future MasonicVerse platform.
I highly recommend Coinsclone to anyone looking for a reliable, experienced, and highly professional blockchain development company. They have earned my complete trust and respect, and I sincerely look forward to working with them again on future projects.
Start Your Web3 Wallet
Tell us your platforms and default networks and we will respond with a scoped proposal covering architecture, safety features and delivery timeline.
- Working wallet demo with your branding applied
- Signing safety features scoped for your users
- NDA signed before technical discussion
Request received
A solution architect will reply within one business day with a scoped proposal and demo link.
Frequently Asked Questions
What is a MetaMask clone script?
Ready-to-deploy software for a non-custodial Web3 wallet delivered as a browser extension and mobile app, with provider injection so websites can request signatures, WalletConnect support, in-wallet swaps and token approval management.
How is a Web3 wallet different from a normal crypto wallet?
A storage wallet mainly sends and receives. A Web3 wallet asks users to approve arbitrary contract calls written by third parties, so decoding, simulation and risk warnings in the signing flow are the core of the product rather than extras.
Why does transaction decoding matter?
Because users cannot consent to what they cannot read. A raw calldata blob with a gas estimate is not informed approval. Decoding turns the request into its actual effect, and simulation shows the predicted balance changes before signing.
What is an unlimited token approval and why is it dangerous?
It grants a contract permission to move an unlimited amount of a token from the wallet, indefinitely. If that contract is malicious or later compromised, funds can be drained long after the original interaction. We flag these explicitly and provide a revocation manager.
Do you build browser extensions as well as mobile apps?
Yes, for Chrome, Brave, Firefox and Edge, with isolated content scripts, hardened page-to-extension message passing, phishing domain detection and per-site connection permissions, plus native iOS and Android apps with an in-app dApp browser.
How are private keys stored?
Generated on-device with platform-secure randomness and stored in hardware-backed storage: the iOS Secure Enclave and Keychain or the Android Keystore, and encrypted vault storage in the extension. Keys are never transmitted to servers or written to logs.
Can users connect hardware wallets?
Yes. Ledger, Trezor and other signers are supported so keys stay offline while your interface handles the interaction, which is how most high-value users prefer to operate.
Which networks are supported?
All EVM networks, with Ethereum, Base, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, Linea, zkSync and Scroll configured out of the box, plus user-added custom networks with chain ID validation. Non-EVM chains are separate implementations.
Can the wallet include swaps and bridging?
Yes, routed through DEX and bridge aggregators with quote comparison, slippage controls and price impact warnings. Swap fees are usually the main revenue line, and because quotes are comparable across wallets, pricing has a visible ceiling.
Will Apple, Google and the extension stores approve it?
Non-custodial wallets are approved regularly in all of them, provided privacy declarations match real SDK behaviour, export compliance is declared, account deletion works, and the branding does not resemble an existing well-known wallet. We manage the submissions.
Can you remove seed phrases with smart accounts?
Yes, using ERC-4337 accounts with passkey login and social recovery on supported chains, which also enables gasless transactions. It is worth doing when onboarding friction is your main constraint.
Will I own the source code?
Yes. Extension, mobile apps, backend and infrastructure transfer to you on delivery, published under your own developer accounts.
Estimate Your Build
Pick a scope and the extras you need. Key management and recovery design carry most of the risk here, and store review adds calendar time you do not control.
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Ranges assume decisions arrive on time. Licensing, banking and third-party audits run on their own schedules and we plan around them rather than inside them.
Get This Scoped ProperlyReady to Launch Your Web3 Wallet?
Share your platforms and target networks and receive a scoped proposal covering architecture, signing safety and delivery timeline.