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DropBit: Bitcoin Wallet

Latest release: 3.2.7 ( 28th January 2020 ) 🔍 Last analysed 21st July 2021 . Not reproducible from source provided Not functioning anymore
2.3 ★★★★★
205 ratings
10 thousand
1st August 2018

Jump to verdict 

Help spread awareness for build reproducibility

Please help us spread the word, asking DropBit: Bitcoin Wallet to support reproducible builds  via their Twitter!

Do your own research!

Try out searching for "lost bitcoins", "stole my money" or "scammers" together with the wallet's name, even if you think the wallet is generally trustworthy. For all the bigger wallets you will find accusations. Make sure you understand why they were made and if you are comfortable with the provider's reaction.

If you find something we should include, you can create an issue or edit this analysis yourself and create a merge request for your changes.

The Analysis 

Update 2021-07-21: Our issues on the repository got no reply, the server’s certificate expired last year and there is no update from the provider in years. Although available on the Play Store, this app is no more and probably for good. People have been loosing money and we strongly recommend to not use this app.

DropBit: Bitcoin Wallet was a custodial lightning wallet and appears to still be a non-custodial on-chain bitcoin wallet. As all funds on the lightning side are locked up with no comment from the provider (who apparently is in jail), we mark this wallet as defunct for now.

Verdict Explained

We could not verify that the provided code matches the binary!

As part of our Methodology, we ask:

Is the published binary matching the published source code? If not, we tag it Unreproducible!

Published code doesn’t help much if it is not what the published binary was built from. That is why we try to reproduce the binary. We

  1. obtain the binary from the provider
  2. compile the published source code using the published build instructions into a binary
  3. compare the two binaries
  4. we might spend some time working around issues that are easy to work around

If this fails, we might search if other revisions match or if we can deduct the source of the mismatch but generally consider it on the provider to provide the correct source code and build instructions to reproduce the build, so we usually open a ticket in their code repository.

In any case, the result is a discrepancy between the binary we can create and the binary we can find for download and any discrepancy might leak your backup to the server on purpose or by accident.

As we cannot verify that the source provided is the source the binary was compiled from, this category is only slightly better than closed source but for now we have hope projects come around and fix verifiability issues.

But we also ask:

Is the product still supported by the still existing provider? If not, we tag it Defunct!

Discontinued products or worse, products of providers that are not active anymore, are problematic, especially if they were not formerly reproducible and well audited to be self-custodial following open standards. If the provider hasn’t answered inquiries for a year but their server is still running or similar circumstances might get this verdict, too.