Trustee Wallet - best bitcoin and crypto wallet

13 minute read

Published:

Wallet Logo

This app was first launched on 1st May 2019 and currently has more than 50000 downloads, a 4.3 stars rating from 480 users and the latest APK is version 1.30.424.

Our last analysis was done on 24th January 2020 based on data found in their Google Play description and their website and their source repository. We discuss verification with the provider in this issue.

We found these ways of contacting the developers:

Older reviews

Disclaimer

The following Analysis is not a full code review! We plan to make code reviews available in the future but even then it will never be a stamp of approval but rather a list of incidents and bad coding practice. We cannot find and tell you all the dark secrets the wallet providers might have.

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.

The Analysis

They asked us to re-evaluate, so … here we go:

On Google Play the version is 1.29.347 yet on their git repository’s full history we find no such version:

$ git log
commit b599fb71548ccc40f9293b5557c6cee8377a2b2e (HEAD -> master, origin/master, origin/HEAD)
Author: Roman Hrusha <rhrusha@gmail.com>
Date:   Thu Jan 23 11:44:09 2020 +0200

    v1.29.362

commit a9e88887dec507ee5354c5d9df7f565c40966149
Author: Roman Hrusha <rhrusha@gmail.com>
Date:   Sat Jan 11 03:11:06 2020 +0200

    v1.29

commit 5e3541825f80dd6cf7031647ddcf21924ac79dac (tag: v1.2)
Author: Roman Hrusha <rhrusha@gmail.com>
Date:   Wed Dec 18 16:48:23 2019 +0200

    v1.2

commit 7700db0616649050a7a95220f1f5eb51392f8a04
Author: ksu <ksu.zhytomirsky@gmail.com>
Date:   Thu Sep 19 14:28:09 2019 +0300

    v1.0

Anyway, lets see if the build instructions now get us further than before:

root@33be2e484ec3:/mnt/android# apt update
root@33be2e484ec3:/mnt/android# apt install python make gcc g++ -y
root@33be2e484ec3:/mnt/android# npm install
...
npm WARN deprecated core-js@2.6.11: core-js@<3 is no longer maintained and not recommended for usage due to the number of issues. Please, upgrade your dependencies to the actual version of core-js@3.
npm WARN deprecated core-js@1.2.7: core-js@<3 is no longer maintained and not recommended for usage due to the number of issues. Please, upgrade your dependencies to the actual version of core-js@3.
npm WARN deprecated fs-promise@2.0.3: Use mz or fs-extra^3.0 with Promise Support
npm WARN deprecated tar.gz@1.0.7: ⚠️  WARNING ⚠️ tar.gz module has been deprecated and your application is vulnerable. Please use tar module instead: https://npmjs.com/tar
...
root@33be2e484ec3:/mnt/android# python ./__hacks__/makeX.py
root@33be2e484ec3:/mnt/android# rm -f shim.js
root@33be2e484ec3:/mnt/android# ./node_modules/.bin/rn-nodeify --hack --install
root@33be2e484ec3:/mnt/android# cd ./android
root@33be2e484ec3:/mnt/android# yes | /opt/android/tools/bin/sdkmanager "build-tools;28.0.3"
root@33be2e484ec3:/mnt/android# ./gradlew assembleRelease
...
BUILD SUCCESSFUL in 13m 1s
903 actionable tasks: 903 executed
root@33be2e484ec3:/mnt/android# ll app/build/outputs/apk/release/
total 48476
drwxr-xr-x 2 root root     4096 Jan 24 11:45 ./
drwxr-xr-x 3 root root     4096 Jan 24 11:45 ../
-rw-r--r-- 1 root root 49621818 Jan 24 11:45 app-release.apk
-rw-r--r-- 1 root root      241 Jan 24 11:45 output.json
root@33be2e484ec3:/mnt/android# exit
$ diff --brief --recursive from*
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Files fromBuild/smali_classes2/com/trusteewallet/BuildConfig.smali and fromGoogle/smali_classes2/com/trusteewallet/BuildConfig.smali differ

No surprise to get a diff here given the version is different. We remain with our verdict: not verifiable.

Verdict Explained

Not verifiable: The provided Source Code could not be verified to match the app released on Google Play.

This verdict means that the provider did share some source code but that we could not verify that this source code matches the released app. This might be due to the source being released later than the app or due to the provided instructions on how to compile the app not being sufficient or due to the provider excluding parts from the public source code. In any case, the result is a discrepancy between the app we can create and the app we can find on GooglePlay 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 app 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.

The app cannot be independently verified. If the provider puts your funds at risk on purpose or by accident, you will probably not know about the issue before people start losing money. If the provider is more criminally inclined he might have collected all the backups of all the wallets, ready to be emptied at the press of a button. The app might have a formidable track record but out of distress or change in management turns out to be evil from some point on, with nobody outside ever knowing before it is too late.