Synpress - e2e testing framework for dApps

Project Name: Synpress

Project Description:

Synpress is a free and open-source end-to-end (E2E) testing library designed specifically for Web3 decentralized applications (dApps). It empowers developers to build robust, reliable, and secure dapps by simplifying complex testing scenarios involving:

  • Wallet Integrations: Seamlessly test interactions with popular Web3 wallets like MetaMask, ensuring smooth user experiences.
  • Smart Contract Interactions: Validate dApp interactions with smart contracts directly, verifying correct functionality and preventing costly errors.
  • Blockchain Events: Test how dApps respond to events on the blockchain, such as transaction confirmations or state changes.

Synpress as a Public Good:

Synpress aligns with the principles of a public good through its:

  • Open-Source Nature: Synpress is 100% open-source, making it freely accessible to everyone.
  • Focus on dApp Quality: By simplifying E2E testing, Synpress contributes to the creation of higher-quality dApps - that are more resistant to bugs, security vulnerabilities, and usability issues, ultimately benefiting the entire Web3 ecosystem.
  • Empowerment of Developers: Synpress removes complexities from dApp testing, making it accessible to a wider range of developers and QA Engineers.

Main Project Funding Sources:

Synpress primary (and only) funding source is grants. It has never received any other type of funding.

Grant Funding:

  • Synpress has received approximately 90,000 OP tokens from both RetroPGF #2 and RetroPGF #3.

Project Roadmap:

Milestones Achieved:

  • Full Playwright Integration: Synpress is deeply integrated with Playwright, a leading modern E2E testing framework, leveraging its power while adding Web3-specific capabilities.
  • Extensive MetaMask Support: A robust API enables testing a wide range of MetaMask interactions, from wallet importing and network additions to transaction confirmations and message signing.
  • Mocked Wallet Functionality (EthereumWalletMock): Allows for testing dApp logic without a real wallet, speeding up tests and improving isolation.
  • Wallet Cache: Caches pre-configured browser contexts with different wallet states for faster test execution.
  • Anvil Integration: Built-in support for Anvil, a local Ethereum testing environment, simplifies testing against a test blockchain.
  • TypeScript Support: Synpress is written in TypeScript, providing a strongly typed API and enhanced developer experience.

Future Milestones:

  • Broader Framework Support: Integrate with Cypress and potentially other testing frameworks (TestCafe,
  • Enhanced Wallet Interactions: Support additional wallets (Phantom, Keplr, Coinbase Wallet, etc.) and explore deeper wallet API integrations for more comprehensive testing scenarios.
  • Improved Developer Experience: Simplify wallet setup, enhance debugging tools, and provide more real-world examples and tutorials.
  • Staying Ahead of the Curve: Support both EVM and non-EVM blockchains and adapt to new Web3 standards and technologies.
  • Community Building: Grow the contributor base and foster a thriving Synpress community.

Funding Goal:

Synpress is seeking funding to achieve its goals of becoming the leading Web3 dApp testing solution. The funds will be used to support the development of the milestones described above.


  • Jakub: Project manager and core developer, active in Web3 since 2020, full-stack engineer at Nash, core contributor at Synthetix (GitHub profile, Twitter)
  • Mateusz: Core developer, active in Web3 since 2022, full-stack engineer at Spectra (GitHub profile)
  • Sero: Core developer, active in Web3 since 2022, full-stack engineer, contractor across various Web3 projects (GitHub profile, Twitter)

Social Credibility:

Project Links:

Contact Information:

  • Discord: jakubsynthetix
  • Telegram: DRPTBL