Key Takeaways:

• Built on Fuel's native multi-asset support, Bako enables seamless transactions across all assets without the UX friction of token approvals or multiple signing steps.

• The wallet's support for multiple signature schemes (Secp256r1 and Secp256k1) ensures compatibility across different blockchain ecosystems while maintaining a consistent user experience.

• Fuel's predicate system allows Bako to offer unlimited free multi-signature vaults without smart contract deployments, revolutionizing how users can secure their assets.

• The wallet has already attracted over 8,000 users, with 40% using its innovative passwordless authentication.

In the world of crypto wallets, there's often an inverse relationship between security and usability. Want maximum protection for your assets? Get ready to juggle seed phrases, manage multiple applications, and navigate complex interfaces. Want something simple? You might have to compromise on security features. The team at Bako looked at this trade-off and asked: What if we didn't have to choose?

For the team behind Bako, this wasn't just a theoretical question. Since 2018, they've been building complex fintech solutions—from AI tools for communication companies to white-label digital banks—at their venture builder in Brazil. This deep experience led them to a crucial insight: "The future isn't about choosing between Web2 and Web3, but finding the sweet spot where they meet," explains Fabio, Bako's CMO.

Even the name reflects this philosophy of elegant solutions to complex problems. "Bako" comes from Himitsu-Bako, the Japanese puzzle boxes renowned for their intricate security mechanisms. These masterpieces of craftsmanship hide their complexity behind seamless wooden faces, opening only when a precise sequence of movements reveals the secret compartment within. It's a fitting metaphor for what the team aimed to create: sophisticated security that feels effortless to use.

Native Multi-Asset Support: A Better Way to Manage Assets

One of the most frustrating experiences in traditional crypto wallets is the constant need to approve token transactions and navigate multiple signing steps. Bako eliminates these pain points by leveraging Fuel's native multi-asset support. All assets on the network are treated as first-class citizens, enabling users to handle multiple tokens and destinations in a single transaction without additional approvals or complex signing processes.

The UTXO model underpinning this system enables efficient transaction handling while maintaining robust security. Users can seamlessly manage their entire portfolio through a unified interface, whether they're making daily transactions or managing institutional-grade vaults. This native support also extends to Bako's multi-signature functionality, allowing vault owners to manage multiple assets without the complexity typically associated with multi-sig treasury management.

Cross-Ecosystem Compatibility Through Multiple Signature Schemes

Bako's support for multiple signature schemes marks a significant advancement in wallet interoperability. The system works with both Secp256r1 and Secp256k1 curves, enabling seamless integration with various blockchain ecosystems and WebAuthn systems. This flexibility eliminates the need for users to juggle different wallets for different networks while maintaining robust security standards.

The implementation showcases the power of Fuel's architecture. Bako's system supports up to 10 signers and allows flexible configuration of the minimum signatures required for transaction approval. Each predicate includes a random hash to ensure uniqueness, even when configured with identical parameters. This scalable architecture is designed to support future signature schemes, positioning Bako as a bridge between different blockchain ecosystems.

Like the puzzle boxes that inspired its name, the complexity of this system is hidden beneath a simple interface. Users don't need to understand the intricacies of different signature schemes—they just experience a wallet that works seamlessly across their entire digital asset portfolio.

Predicates: Unlocking New Possibilities for Multi-Sig

The numbers tell an interesting story about how users interact with Bako. Of their 8,000+ users, 40% entered through their innovative account abstraction feature—using just a username and biometric authentication, no external wallet required. This isn't just a convenience feature; it's a fundamental rethinking of how users should be able to enter the crypto ecosystem.

Traditional multi-signature wallets rely on complex smart contracts, each deployment adding to chain bloat and user costs. Bako's predicate-based approach fundamentally reimagines how multi-signature security can work. "It's really simple and elegant," says Fabio. "You just provide the transaction and the signatories. You don't need to rely on very complex smart contract logic."

The predicate system allows users to create unlimited secure vaults without deployment costs. The Sway bytecode contains all validation logic, handling signature verification and transaction approval based on predefined rules. This security model has been audited by Quill and found to be "impossible to hack" when combined with PassKey security.

While only 10% of users currently utilize multi-signature features, the seamless integration means these advanced security options are always just a click away. "It's supposed to be with you for your whole journey throughout Fuel," Fabio explains, "from the moment you onboard using the easiest login you have, until you're holding your bags in the most secure way in a multi-sig."

Building for the Future

In Japanese culture, the safe itself is considered as valuable as what it protects—the craftsmanship of security is an art form. Bako brings this same philosophy to digital asset management. Their work on EVM compatibility will soon allow users to create Bako accounts with popular tools like MetaMask. Hardware wallet integration is in development, and a new mobile-first UI is in the making.

The team sees particular potential for impact in economically challenged regions. "In economically disadvantaged regions like LATAM, low-value transactions are far more common, and anything that simplifies onboarding while reducing transaction costs makes a tremendous difference," explains Fabio. "Fuel's experience from onboarding to costs and speed feels remarkably close to Web2, significantly reducing the friction of self-custody. This opens the doors to a global decentralized finance market, providing real financial opportunities for these communities."

Perhaps most intriguing is how Bako is positioning itself within the broader Fuel ecosystem. Their PassKey solution isn't just for their own users—it's being designed so other developers can integrate it into their applications. When users create accounts through these integrations, they'll automatically have access to Bako's full feature set, creating a network effect that could reshape how users interact with the entire ecosystem.