> For the complete documentation index, see [llms.txt](https://docs.bitcoinos.build/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.bitcoinos.build/technical-documentation/grail-pro-charms-zkbtc/technical-overview/grail-pro/grail-pro-system-architecture/front-end.md).

# Front End

Role: Provides a user-friendly interface for managing transaction flows, sign-offs, and real-time tracking within the Grail ecosystem. Integrates with users' blockchain wallets.

Trust Model: Users trust the frontend due to custodian branding, audited open-source code, and simplicity. It queries operators for public keys to generate Taproot deposit addresses with timelocks for refunds.

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