Any content produced by the Bonfida Foundation, or developer resources that the Bonfida Foundation provides, are for educational and inspiration purposes only. Bonfida does not encourage, induce or sanction the deployment of any such applications in violation of applicable laws or regulations.
- iOS: https://apps.apple.com/hk/app/jab-bonfida/id1593196027?l=en
- Android: https://play.google.com/store/apps/details?id=com.bonfida.jab
The app is built with Expo
To install the Expo:
yarn global add expo-cli
To launch the local environment
yarn && yarn start
The smart contract can be found here: Jab smart contract
The secret key is stored using expo-secure-store https://docs.expo.dev/versions/latest/sdk/securestore/
On the mobile versions, transactions don't need to be approved, they are automatically approved.
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DMs: For DMs (i.e 1 on 1 conversations) all messages are encrypted end to end using Diffie-Hellman keys. The encryption happens on the mobile before sending the message on-chain. For images, videos and audios, the file is encrypted using Diffie-Hellman, uploaded on IPFS, then the IPFS hash is encrypted and sent on-chain.
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Groups: Groups are unencrypted at the moment. This means that the entire group chat history is visible on-chain. If you want to contribute to the repo to add group encryption using Double Ratchet please reach out to us, grants are available.
Gas cost will depend on the length of your message
| Message length (characters) | Transaction fee (SOL) |
|---|---|
| 100 | ~0.002 |
| 200 | ~0.0026 |
| 500 | ~0.00469 |
| 1,000 | ~0.0082 |
| 2,000 | ~0.015 |
For files, the gas cost does not depend on the size of the file because only the IPFS hash is sent on-chain.