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Generic sybil-resistant faucet

  • Team Name: MB Karolio reikalai
  • Payment Address: 0xc3e6eFA4D0847203dD4E19B7D114516Eb45840EC (DAI)
  • Level: 1

Project Overview πŸ“„β€‹


Sybil-resistant faucet is a generic browser-based faucet solution that can be used on any existing parachain (substrate-based chain, either pallets or ink! smart contracts).

Project Details​



Technology stack​

  • Next.js
  • TypeScript
  • Tailwind
  • Redis
  • @polkadot{.js}




To make the faucet generic, it will store its configuration settings in .env file which will include the following settings:

  • DRIP_CAP - how many tokens to send per drip
  • DRIP_DELAY - how often user's can request to drip tokens (in ms)
  • REDIS_ENDPOINT - Redis instance endpoint
  • RPC_ENDPOINT - Substrate node endpoint
  • PORT - Substrate node port
  • FAUCET_ACCOUNT_MNEMONIC - mnemonic of faucet's wallet
  • NEXTAUTH_ENDPOINT - authentication endpoint
  • NEXTAUTH_JWT_SECRET - used to encrypt JWT tokens
  • TWITTER_CLIENT_ID - Twitter client ID
  • TWITTER_CLIENT_SECRET - Twitter client secret
  • GITHUB_CLIENT_ID - GitHub client ID
  • GITHUB_CLIENT_SECRET - GitHub client secret

Ecosystem Fit​

Many dApps are facing an issue where it’s difficult to onboard new users. Thus, the goal is to simplify the process by making it easier for parachain and dApp developers to spin up their own faucets, and give users free tokens without people exploiting the system. In order to make the system sybil-resistant, centralised solutions like Twitter or GitHub login will be integrated, that will uniquely identify users, and enable dripping tokens to the account only once per given time period.

Some similar projects include:

Team πŸ‘₯​

Team members​

  • Karolis Ramanauskas: full-stack developer & product designer


  • Registered Address: LiepΕ³ g. 83, KlaipΔ—da 92195
  • Registered Legal Entity: MB Karolio reikalai

Team's experience​

Karolis is product-minded software engineer who enjoys the challenge of creating pleasant, easy-to-use user experiences. He has worked on large-scale projects for his employers, as well as side-projects of his own. Some of the most notable experiences include building observability tools used by thousands of engineers at Uber that alert and help resolve new incidents, and enable to build more reliable services. He has also worked on a design system for Volvo Cars, and then became responsible for building tools to replace existing translation processes at the company to make them more effective.

Team Code Repos​

Team LinkedIn Profiles​

Development Roadmap πŸ”©β€‹


  • Total Estimated Duration: 1 month
  • Full-Time Equivalent (FTE): 1 FTE
  • Total Costs: 4,000 USD

Milestone 1 β€” Implement the Faucet​

  • Estimated duration: 1 month
  • FTE: 1
  • Costs: 4,000 USD
0a.LicenseApache 2.0
0b.DocumentationI will provide both inline documentation of the code and a tutorial that explains how a developer can spin up his/her own faucet.
0c.Testing GuideCore functions will be fully covered by unit tests to ensure functionality and robustness. In the guide, I will describe how to run these tests.
0d.ArticleI will publish an article that explains how the faucet works, why it was created, and how it can be used by developers.
1.User InterfaceI will create faucet UI with Tailwind. It will include address form, login buttons, as well as error and success states.
2.AuthenticationI will create a module for 0Auth user authentication that will uniquely identify users and make faucet sybil-resistant.
3.User statusI will create a module for checking whether user is eligible to receive free tokens.
4.Faucet dripI wil create a module that will send user free tokens if eligible.

Future Plans​

  • Keep adding additional 0Auth options or other features if needed.
  • Keep maintaining the project in case of potential issues.

Additional Information βž•β€‹

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