Short Summary

Enterprise game studios can boost signup completion rates by over 2x and speed up logins by 30-70% by introducing an “invisible wallet.” This wallet combines passkeys, ERC-4337 paymasters, and EIP-7702 smart EOAs, all while steering clear of compliance issues. This playbook outlines how to roll it out in just 90 days, ensuring measurable ROI, working with SOC2-ready vendors, and keeping the flows friendly for the App Store.

The “Invisible Wallet”: Creating Frictionless Onboarding for Gamers

-- Pain • Agitate • Solution • Proof --

Your wallet step is silently killing conversion

• When you’re doing user testing, telling gamers to “create a wallet” is a total dealbreaker. Immutable ran an A/B test with over 7,000 gamers and found that their one-click Passport wallet led to more than double the completion rates compared to the old-school “email + wallet creation” method. Plus, a whopping 70% of users opted for Google SSO. (immutable.com)
• Even when users give it a shot, passwords and seed phrases just aren’t cutting it. According to FIDO’s 2025 Passkey Index, passkeys have a remarkable 93% success rate for logins, while traditional methods only hit 63%. Google found that signing in with passkeys is four times more effective than using passwords. That’s some serious improvement in the user journey. (businesswire.com)
• Mobile is making things a bit trickier with its policies. Until recently, iOS didn’t allow external payment links (and the rules still change depending on the country). As of May 1, 2025, Apple is opening up to external links and calls to action in the U.S. App Store, but you’ll need to ensure your rollout is geofenced and can handle any hiccups. (9to5mac.com)
• Watch out for engineering debt lurking in the background. Paymasters can be exploited; if there's a misconfigured ERC-4337 flow or issues with post-operation charges, it could lead to drained deposits. There have been several real-world hiccups (like packing bugs and post-operation failures) that have caught teams off guard when they’ve been working with 4337 in live settings. (alchemy.com)

Result: We’re seeing some funnel drop-off, falling short of our Monthly Active User (MAU) goals, and running into procurement hiccups because vendors are struggling to pass their SOC2 or ISO checks. And that’s how launches get delayed.

The cost of doing nothing

• Lost bookings: Did you know that 47% of customers bail on a purchase just because they can’t remember their password? By using passkeys, you can chop sign-in time down by 73% (we're talking 8.5 seconds instead of 31.2 seconds). So, every login hurdle you put up could be costing you revenue. (businesswire.com)
• Time pressure: Ethereum’s Pectra is rolling out its mainnet on May 7, 2025, with the introduction of EIP-7702. This allows Externally Owned Accounts (EOAs) to temporarily act like smart contracts. If you don’t jump on both EIP-7702 and EIP-4337, you might face higher gas fees, a messier code structure, and tougher migrations down the line. (blog.ethereum.org)
• Mobile risk: WebViews in hybrid frameworks haven’t fully nailed WebAuthn support yet. To get that “passkey” button working on all devices, you’ll need to use native bridges or deep-link handoffs. Otherwise, it might just not show up for some users. (web3auth.io)
• Inclusion risk: If you’re not using the ERC-4337 Shared Mempool, you’re relying on a single relayer. If that bundler gets stuck, your transactions come to a halt, and your users aren’t going to be pleased. The Shared Mempool is already running on Ethereum, Arbitrum, Optimism, and more, but you need to opt-in and manage multiple homes. (etherspot.io)
• Compliance drag: If you’re handling enterprise wallets, you’ve got to meet SOC2 and ISO due diligence requirements. Platforms like Fireblocks WaaS come equipped with SOC2 Type II, CCSS Level III, and ISO 27001/27017/27018 certifications. Pick the wrong solution, and you could find your procurement process dragging on for ages. (fireblocks.com)

When 30-60% of users struggle in their first session, deadlines get pushed back, budgets take a hit, and your user acquisition dollars just don’t deliver.

7Block’s “Invisible Wallet” blueprint (90‑day pilot)

We’ve created a seamless wallet experience where players don’t have to worry about keys, gas fees, or networks. You still get to enjoy self-custody guarantees, stay compliant with App Store requirements, and work with vendors that are friendly towards SOC2 standards.

1. Identity and login: Passkeys first, seed phrases never

• Let's make things easier by starting with WebAuthn passkeys using platform keychains like iCloud, Google Password Manager, and Windows Hello. You can expect logins to be 30-70% quicker, and way more reliable! As a safety net, offer email/OTP as a backup option. (businesswire.com)
• When dealing with hybrid apps: For those using Capacitor or Unity WebView, it's best to connect to native FIDO2 APIs or use deep-links to the system chooser instead of just leaning on WebView WebAuthn for now. We've got some handy per-platform adapters and test matrices published. (web3auth.io)
• For games focused on Sui or multi-chain environments, zkLogin is a smart approach to take: OAuth → ZK proof → on-chain account. This method lets us create “invisible wallets” that work even when you’re not changing chains. (sui.io)

2) Account Architecture: “7702‑front, 4337‑spine”

• When we're using Pectra live, we kick things off with EIP‑7702. This lets EOAs run contract code on a per-transaction basis without needing to change their address. After that, we send the execution through ERC‑4337, which handles paymasters, batching, and analytics. The awesome outcome? You get to stick with one address and enjoy a session-key-like user experience while keeping all the 4337 tools intact. Check it out here.
• By default, we also integrate the ERC‑4337 Shared Mempool to ensure inclusion guarantees. Plus, we’ve got bundlers set up across different providers and regions, so you’re covered no matter where you are. For more details, head over to this link.
• And for those intense gaming sessions, we use session keys to give temporary permissions (like target contracts, function selectors, spending limits, and validity periods) within wallet modules. This means you won’t be bothered with constant prompts in the middle of your match. You can learn more about it here.

3) Gasless Onboarding: Paymasters with Guardrails

• We’ve rolled out some cool sponsor logic that pre‑charges or locks value during validation instead of waiting until after execution. This way, we can tackle those annoying deposit‑drain griefing issues and keep tight budget controls for each cohort or region. Check it out here: (osec.io).
• Our 4337 setup makes sure that validation is predictable, with strict gas limits and off‑chain simulation matching, which helps us block any potential grief vectors. We also keep an eye on EntryPoint deposits and staking windows to stay on top of things. For more details, dive into our documentation: (docs.erc4337.io).

4) Recovery without support tickets: MPC + ZK attestations

• Combine passkeys with MPC or TEE-secured embedded wallets (stick with SOC2/ISO vendors) for that sweet non-custodial control and easy recovery. A popular pick for enterprises looking for CCSS Level III and ISO attestations is Fireblocks' Wallet-as-a-Service. Check it out here.
• Don’t forget to throw in some ZK-based identity proofs when necessary! You can use Polygon ID age-gates (+18/+21) along with zkEmail/zkVerify proofs to handle email ownership or recovery, all while keeping your personally identifiable information (PII) safe and sound off-chain. More details can be found here.

1. App Store-Proof Purchase Flows (U.S. First)

• In the U.S., iOS has opened up to external payment links! We’re able to detect the storefront and switch to compliant in-app purchases (IAP) when needed. This makes things smoother for users while keeping everything Apple-compliant and consistent globally. (9to5mac.com)

6) Chain Selection for Games: Price/Performance with SDK Maturity

• Looking for a smooth Unity integration with reliable gamer funnels? Check out Immutable zkEVM + Passport. It’s been tried and tested, featuring Unity SDKs and solid PKCE flows. We’ve even noticed a 2x increase in signup completion during public tests! (docs.immutable.com)
• If ultra-low fees and EVM liquidity are your top priorities, Base/Arbitrum/Optimism using 4337 + Shared Mempool is a solid choice. We fine-tune on-chain actions to ensure sub-second perceived latency through batching and sponsored gas. Want to dive deeper? Check it out here: (etherspot.io)

To get things done, we roll out our engineering expertise through these service lines:

• Full-stack delivery with our web3 development services and custom blockchain development services.
• Protocol-level hardening through our security audit services.
• Platform wiring and SSO/analytics using blockchain integration.
• Cross-chain routing thanks to our cross-chain solutions development.
• Gameplay-focused UX with our dApp development and on-chain logic powered by smart contract development.

Practical build details (what we actually ship)

Authentication and Device UX

• Passkeys: So, we’re all about that @simplewebauthn action for web use, and we've got native FIDO2 APIs all set up for Unity/Unreal on iOS and Android. You can enjoy autofill and a slick conditional UI wherever available, making “tap‑to‑enter” a breeze! Check out more about it here.
• Storefront Routing: We’re rolling out feature flags to make external payment links available just for our U.S. iOS folks. For everyone else, we’ll seamlessly switch back to IAP or web checkout options. Want to dive deeper? Head over to 9to5mac.com.

Account Abstraction (7702 + 4337)

• We're seeing a “Smart EOA” thanks to 7702, which allows for per-transaction code execution without any visible migration for users. Then, it connects to the 4337 EntryPoint for batching and sponsorship. The Pectra mainnet kicked off on May 7, 2025. Check out more details here.
• There are shared Mempool bundlers with regional failover in place, plus IPFS metadata discovery has been enabled. We've also got a resubmission strategy set up that spans across various providers. Dive deeper into this here.

Session Keys for Games

When it comes to gaming, here's how you can create a session token that lasts throughout a match:

• Generate a scoped session token for “match duration” with:
  • Allowlist: You'll need to specify the contract and selectors (like claimReward() or craftItem()).
  • Spend Caps: Set limits on native and ERC‑20 tokens for each interval.
  • Expiry: Aim for a validUntil time of around 20-30 minutes.

This process is enforced within the wallet module during the validateUserOp. Check out more details in the ERC 4337 documentation!

Paymaster Guardrails

• Pre-execution charging or escrow during validation: We make sure to reject operations that don’t have enough allowance before anything gets executed. This way, we steer clear of post-operation charging patterns that could lead to issues. Check out more details here.
• Deterministic validation only: We stick to using only deterministic reads--so, no BLOCKHASH or anything that’s non-deterministic. It’s all about keeping a strict simulation parity with your backend risk engine. For additional info, dive into the details here.

Unity SDKs and Game Engines

• Immutable Passport Unity SDK (Windows/macOS/iOS/Android; PKCE OAuth; deep-link redirects). We’ve got some handy IL2CPP notes and WebView tips for you. Check it out here: docs.immutable.com.
• WalletConnect/Thirdweb/Sequence Unity SDKs are perfect for cross-wallet compatibility and embedding wallets with TEE+AA. Dive into the details at walletconnect.com.

ZK‑Powered Compliance

• We're leveraging Polygon ID for age and country proofs. Plus, we've got zkEmail and zkVerify on deck for email ownership verification--all at super-friendly costs for Layer 2. Check it out on GitHub!

Security and Procurement

• It's best to go with vendors that have SOC2 Type II or ISO 27001 certifications (like Fireblocks WaaS). We take their attestations and match them up with your vendor due-diligence checklist and SLAs (aiming for at least 99.9%). Check it out at fireblocks.com.

Example: player signup flow (web + mobile)

1. When the player hits “Play,” we set up some cool conditional UI for passkeys. If those aren’t supported, we’ll show options to “Continue with Google/Apple” and throw in a magic link as a backup. This helps reduce the help-desk load by a whopping 93%! (businesswire.com)
2. The first time a user takes an action that requires chain state, we create a smart EOA session using 7702 and direct interactions through 4337. We’ve got a paymaster ready to cover the gas for the tutorial. (blog.ethereum.org)
3. While the player is in the game, a session key lets them claim drops and craft items up to a limit--no annoying prompts over and over. And don’t worry, the session will auto-expire when it’s done. (docs.erc4337.io)
4. If a user finds themselves needing recovery, they can use a passkey, an MPC shard, and optional ZK email proof to regain access--no need to submit support tickets! (fireblocks.com)

Emerging best practices (2026)

• Start with passkeys and keep an eye on your “Auth‑to‑Play” time; let’s shoot for that sub‑10s median. FIDO’s benchmarks suggest around 8.5s is doable. (businesswire.com)
• Roll out 7702 and 4337 at the same time; think of 7702 as a boost for the EOA UX and 4337 as your go-to “execution rail” for handling paymasters, batching, and analytics. (blog.ethereum.org)
• Get on board the 4337 Shared Mempool and team up with multi‑home bundlers; if not, you'll end up with a single‑relay failure scenario. (etherspot.io)
• Skip the post‑operation paymaster charging; consider pre-funding or escrow during validation to avoid deposit headaches. (osec.io)
• For iOS users in the U.S., make sure to allow external purchase links; keep the IAP experience consistent elsewhere, and have those feature flags ready just in case policies change. (9to5mac.com)
• Utilize ZK credentials for age or country checks to steer clear of PII storage issues; both your DPA and GDPR profiles will be grateful. (github.com)

Proof: GTM and ROI you can forecast

• Immutable’s real-world A/B test showed that signing up with Passport more than doubled the completion rate compared to the email + wallet method. In 2024, several titles even hit over 4 million signups thanks to Passport’s super easy “one-click” onboarding. This isn't just some lab result; it’s the real deal in broad reach. (immutable.com)
• According to FIDO’s Passkey Index, we’re seeing a 93% success rate and logins happening 73% faster. If you're currently sitting at about 65% sign-in success and you can boost that to 93%, you're looking at a 43% lift in your funnel right from the start. With a $4 cost-per-install (CPI), this translates to roughly a 30% reduction in customer acquisition cost (CAC), all while keeping your media spend the same. (businesswire.com)
• There are operational perks too! Organizations that have switched to passkeys are seeing a major drop in help-desk tickets--like a 77-81% reduction in login-related issues--which means their community and support teams have more bandwidth for live operations. (auth0alternatives.com)
• Plus, there’s a policy boost on the horizon: with iOS allowing external links in the U.S., you can guide high-intent users to quicker, smoother checkouts. This means you can enjoy a measurable increase in average revenue per paying user (ARPPU) without running afoul of App Review rules. (9to5mac.com)

We connect these to a straightforward KPI plan:

• Auth metrics: passkey enroll rate, login success rate, median Auth-to-Play seconds
• On-chain metrics: sponsored gas per DAU, session-key success rate, 4337 bundle inclusion latency
• Commercial metrics: signup completion rate, FTUE conversion, D7 retention, CAC payback period

90‑Day pilot: milestones and deliverables

Weeks 0-2: Discovery + Security Readiness

• We kicked things off with a platform audit, identifying the target chains and laying down policy constraints based on each store and region. We also put together a short-list of vendors that meet the SOC2 and ISO standards.
• Drafted up a procurement package to keep everything organized.
• Established baseline KPIs for the pilot and set up some “Auth-to-Play” synthetic tests for monitoring.

Weeks 3-4: Passkeys + Fallback Auth

• We're diving into WebAuthn paired with platform keychain integration, along with hybrid app bridges. Plus, keep an eye out for feature flags for iOS in the U.S. storefront for those external links. Check out more details here: (9to5mac.com)

Weeks 5-6: 7702 Smart EOAs + 4337 Backbone

• We’ve got EIP‑7702 up and running, along with the integration of EntryPoint for 4337. Additionally, our Shared Mempool bundlers are now multi-homed, plus we've laid some solid groundwork for analytics. Check out more details over at (blog.ethereum.org).

Weeks 7-8: Paymaster with Anti-Griefing

• We’re diving into pre-execution charging, which means we’ll be working on budget throttles, deposit monitors, and running chaos tests to tackle issues like replay and gas grief. You can read more about it here.

Weeks 9-10: ZK Compliance Gates

• We’ve got Polygon ID age and country proofs coming in; plus, there’s an option for zkEmail recovery. The DPA has been updated to emphasize that there's “zero PII on-chain.” Check it out here: (github.com)

Weeks 11-12: Unity SDK Integration & Scale Testing

• Working with Immutable, WalletConnect, and Sequence SDKs; testing with 10,000 concurrent synthetic users. We’ve set our Service Level Objectives (SLOs) for login times under 10 seconds and bundle inclusion to be less than 2 blocks. Check out the details here: (docs.immutable.com)

We provide top-notch, production-ready code along with documentation that your legal and security teams will love to approve. Need extra support? Check out our web3 development services and security audit services - they're fully packaged and ready to go!

What this means for your roadmap

• Faster time‑to‑fun: Say goodbye to seed phrases, annoying network popups, and relayers that get stuck--just hop in and start playing.
• Lower CAC, higher retention: Getting double the signup completion rate means you’re scoring the best user acquisition deal around. Check out more on this at (immutable.com).
• Fewer tickets, fewer fire drills: With passkeys, login failures are a thing of the past, and the Shared Mempool cuts down on those frustrating "it didn’t go through" messages. More info on this can be found here: (businesswire.com).
• Procurement-friendly: Thanks to SOC2/ISO vendors and data-minimized ZK flows, security reviews are quicker and smoother. For details, check out (fireblocks.com).

If you're looking for a wallet that's completely invisible--one that your CFO, CISO, and Executive Producer can all agree on--this is your go-to guide.

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