Welcome to the next Stacks Builders Challenge! This is a 1-week, online innovation sprint focused on deepening Bitcoin utility through embedded wallets on Stacks. Running from October 6th to October 13th, 2025, this contest invites developers globally to build an embedded wallet integration around sBTC using Turnkey’s SDK. We’re excited to partner with Turnkey, who will provide elevated transaction limits for participants and offer a Pro subscription to the winner, plus follow-on work for the SDK itself. > “Turnkey is proud to support the Embedded Wallet Challenge. We’re empowering builders on Stacks to deliver secure, seamless wallet experiences that improve usability and drive adoption.” -- Bryce Ferguson, CEO & Co-Founder at Turnkey ## The Challenge ### Build an sBTC App with Turnkey Embedded Wallet SDK Your task: build a minimal viable product (MVP) application that integrates Turnkey’s embedded wallet SDK and enables users to transact in sBTC on Stacks. Focus on enabling a smooth, intuitive flow within an embedded wallet experience. The core deliverable is the integration + working sBTC transactions in your app. The goal: show a compelling example of how embedded wallets can unlock frictionless Bitcoin-native experiences on Stacks. Note: The winner will be eligible for a follow-up grant (e.g. $3,000 in STX) to contribute toward integrating deeper Stacks support (e.g. into Turnkey’s SDK itself) after the contest. ## How It Works The contest runs one week: Oct 6 – Oct 13, 2025 You build your submission for the embedded wallet + sBTC app track The winner is selected based on execution, UX, robustness, and creativity After winning, you may be offered a grant to work with Turnkey in officially adding/improving Stacks support in their SDK ## Requirements - Working MVP - The app must integrate with Turnkey’s embedded wallet SDK (e.g. via @turnkey/react-wallet-kit or equivalent) ([Turnkey](https://docs.turnkey.com/sdks/react?utm_source=chatgpt.com)) - The app must demonstrate sBTC transactions on Stacks - It should operate end-to-end in testnet mode ## Submission Package Public, live demo or deployed proof GitHub repo (open-source, with documentation) Demo video (≤ 5 minutes) showing core flows ## Prize & Next Steps $2,000 STX awarded to the winner of the embedded wallet + sBTC app Winner becomes eligible for a follow-on $3,000 STX grant to help build or extend Turnkey’s SDK with native Stacks support Winner will receive Turnkey Pro subscription and promotional amplifications ## Resources [Turnkey Embedded Wallet docs](https://docs.turnkey.com/embedded-wallets/overview) [Stacks docs](https://docs.stacks.co/) [How to integrate sBTC in apps](https://www.hiro.so/blog/how-to-integrate-sbtc-into-your-application) [TurnKey’s dedicated Stacks guide](https://docs.turnkey.com/networks/stacks) [Understanding transaction signing in Stacks](https://www.hiro.so/blog/dissecting-a-transaction-signature-on-stacks) ## Timeline - Hackathon Start — Oct 6, 2025 (00:00 UTC) - Submission Deadline — Oct 13, 2025 (23:59 UTC) - Judging Period — Oct 14 – Oct 16, 2025 - Winner Announcement — Oct 17, 2025 ## Additional Notes - Fully online and global - Open to all levels (no prior Stacks or Turnkey experience required) - All submissions should be original work - Use of AI is allowed so long as your team understands and validates it - Submissions that do not show working sBTC integration will be disqualified Stacks transaction signing and address generation is currently not natively supported out-of-the-box in TurnKey’s SDKs, but there are workarounds that you’ll have to figure out. Check out the resources provided for examples. ### Submission & Communication Submit via DoraHacks before the deadline Join our [Telegram](https://t.me/+tdhAoFHAtdk0MGVh) for community support, Q&A, mentorship hours Stacks developers will be available for technical assistance during the challenge