If you are very committed to the standard of self-custody of sats and feel that ecash sats do not meet this standard, how about maintaining a balance of only 100 ecash sats? 

When the balance exceeds 100 sats, you can melt them back into Lightning Network sats. If the balance falls below 100 sats, you can mint some ecash sats from Lightning Network sats.

This is why we added mint and melt operations here. nostr:note1spv99eg2l4y4k59qghx8gqlq3hrtuze552n2s67jj9v84y0u8znqfyf0sp 

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 when keychat beta ? 

 We are still developing the application; it will take a few more weeks to release the code and the Android APK. 

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 Can you add a little color to the integration of ecash into the app? 

 Our initial goal was to use Bitcoin ecash as postage for messages. Later, we thought about implementing various bots on Keychat, such as AI question-and-answer bots, where users can ask questions by paying ecash sats. Therefore, small payments might also be something users need. As a result, we are enhancing the functionality of the ecash wallet, and have already implemented Cashu v1.