Client Overview:

Liminal, a leading self-custody solution provider, embarked on a transformative journey to enhance its existing system by adding chain support for various prominent blockchain networks. The objective was to integrate multi-signature wallets using hardware solutions like Ledger and AWS, alongside single signature mobile wallets using MPC (Secure Multi-Party Computation) for chains like Ripple, TRON, Polkadot, and Cosmos.

Project Scope:

Liminal aimed to expand its self-custody platform to support four diverse blockchain networks—Ripple, TRON, Polkadot, and Cosmos. The project included the integration of multi-signature wallets with hardware support, AWS integration, and the addition of single-signature mobile wallets using MPC.

Blockchains used in Liminal Chain

I. Ripple Integration:


  • Multisignature wallets with Ledger hardware support and AWS integration.
  • Single signature mobile wallets using MPC with a Half signing method for Ripple chain.

Challenges Faced:

  • Hardware Wallet UI Support: The team encountered challenges in integrating Ledger hardware support seamlessly into the user interface, ensuring a user-friendly experience.
  • Transaction-Based Signing: Implementing transaction-based signing in the backend posed challenges, requiring meticulous attention to security and functionality.

II. TRON Integration:


  • Extending multisignature wallets to support TRON with Ledger hardware and AWS integration.
  • Single signature mobile wallets using MPC with a Half signing method specific to TRON.

Challenges Faced:

  • Ledger Integration Issues: The team faced substantial challenges during the integration of Ledger with TRON due to discrepancies in supporting libraries.
  • Mobile Signing with MPC: Integrating mobile signing from devices with algorithm support for TRON presented complexities that needed to be addressed.

III. Polkadot Integration:


  • Multisignature wallets supporting Polkadot with Ledger hardware and AWS integration.
  • Single signature mobile wallets using MPC, featuring a Half signing method for Polkadot.

Challenges Faced:

  • Library Changes: Issues arose post Polkadot chain integration as the existing library underwent updates, leading to changes in weight calculations and discontinued support for weight management.
  • Transaction Structure Changes: The team had to adapt to alterations in the transaction structure resulting from library updates.

IV. Cosmos Integration:


  • Multisignature wallets supporting Cosmos with Ledger hardware and AWS integration.
  • Single signature mobile wallets using MPC, featuring a Half signing method for Cosmos.

Challenges Faced:

  • Smooth Integration: Fortunately, the team faced minimal challenges during Cosmos chain integration, owing to the well-documented nature of the chain and the team's comprehensive understanding.

Results and Impact:

  • Overcoming UI and backend challenges, Liminal successfully integrated Ripple chain support, providing users with secure multisignature and single signature wallet options.
  • Despite facing Ledger integration issues and complexities in mobile signing, the team achieved successful TRON chain integration, expanding the platform's versatility.
  • Adapting to library changes, Liminal successfully integrated Polkadot chain support, demonstrating resilience in overcoming challenges related to library updates.
  • Benefiting from a well-documented chain, the Cosmos integration was seamless, further reinforcing Liminal's commitment to providing diverse blockchain support.


Liminal's journey in integrating support for Ripple, TRON, Polkadot, and Cosmos chains showcases the company's dedication to evolving its self-custody solution. Despite facing challenges inherent to blockchain integration, the Seven Bits Technologies team's expertise, adaptability, and commitment resulted in a successful implementation, broadening the capabilities of Liminal's self-custody platform and providing users with enhanced blockchain support.

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