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zkBob is a zk-based privacy application that works with the BOB stablecoin. We’ve introduced a new Direct Deposit functionality into zkBob, where BOB can be sent directly from a smart contract on Polygon or Optimism into the privacy pool.


We want you to use direct deposits to build out use cases where responsible privacy is preferred 🔥

  • 🥇 1st prize - 5,000 BOB
  • 🥈 2nd prize - 2,000 BOB
  • 🏅 Notable projects: pool of 3,000 BOB will be evenly distributed among all other notable submissions

Ideas for implementations

  • Integration within open-source wallets
  • Apps for DAO accounting
  • Browser extension for zkBob
  • Donation/fundraising/tipping apps
  • Privacy for P2P micro-transactions
  • Integration with DEXs/bridges/aggregators

We are also open to novel use cases which make sense for privacy-preserving transactions

Acceptance Criteria

  • Creativity, novelty, usefulness for end users and implementation quality.
  • Importance of zkBob integration to the overall application/product (i.e. is it integral to app functionality, usefulness and purpose or is it an add-on without a lot of added value).
  • Coherent integrations between zkBob and other existing protocols/dApps are appreciated
  • Alignment with the BOB and zkBob ecosystem values of on-chain privacy protection within accepted limits.
  • Incorporate some UI functionality so that users can send BOB privately through a browser or mobile based application.
  • *extra credit will apply to solutions using other zkBob components on top of integration with direct deposits (zkBob SDK libraries, gift cards, compliance tooling, deep smart contract integrations, etc.)


This workshop is happening in-person
Integrating zkBob privacy into DeFi workflows
Time: 05:00 PM JST – Apr 14, 2023
Location: 5th Floor | Workshop Room 3