Build your own storagecoin - Group11 #3239

PauluzzNL · 2017-11-21T09:50:06Z

Project H: Build your own Storagecoin

You will make your own storagecoin within this project. Filecoin is the largest ICO in the history of cybercurrency, see our analysis. A total of $257 million is given to a project without any running code. The big idea of your project and Filecoin is to turn any storage device into a cash generation machine. Key target is expanding an existing system with mobility of mined storage coins. Your code will allow send credits to another Android wallet. First task is to understand the Trustchain fabric by TUDelft, our 12 years of ledger prototyping and Android implementation. See project A for starting point with coding. Second task is to enable Android-to-Android transfer of coins. Finally, implement private key importing within your Android code and exporting using QR codes from the Tribler credit mining system.

@devbridie
@PauluzzNL
@mitchellolsthoorn
@RoelofSol
@DavidGSB

RoelofSol · 2017-11-21T16:08:51Z

Our first milestone is:

Extend Tribler with the feature to generate a QR code from a key pair ( pybip38 )
This QR code can be picked up by a mobile phone using a version of the TrustChain Android app .
The Android app can transfer credits to a second phone without using wifi. ( bluetooth/NFC/QR-codes/audio)

Our first week objective:

Have local builds of Tribler and Android and get acquainted with their code base.

RoelofSol · 2017-11-24T09:55:47Z

Meeting - Friday - 24 Nov
We heard that there are problems with the available Android app.
We hope to get a POC QR exchange between PC and Android working.

Tasks:

Activate the Tribler market? and extract the key pair ( @DavidGSB & @PauluzzNL & @mitchellolsthoorn )
Use Python to generate QR codes and display in Qt5 ( @RoelofSol )
POC Android app to scan and display QR Codes ( @devbridie )

RoelofSol · 2017-11-28T12:42:24Z

QR generation examples

RoelofSol · 2017-11-28T12:57:18Z

Meeting with Pouwelse - Tuesday - 28 Nov

We discussed the progress so far, and came to the conclusion that we should start communicating with the other group and TA that is working on the Android App.

Update existing android app with QR scan to import the key to android ( @devbridie , @PauluzzNL )
Export QR code button in Tribler ( @mitchellolsthoorn ) .
Contact Overlay app group & student assistants (@RoelofSol )
Checkout Qt native QR code geneneration ( @RoelofSol )
Setup Android & Tribler Dev environment ( @Davidgsr)

mitchellolsthoorn · 2017-12-02T13:49:25Z

Progress on key export in Tribler, code can be found in PR #3267 :

The individual buttons export the three different key pairs present in the session state of Tribler.

RoelofSol · 2017-12-05T12:52:34Z

The goal will be changed to wallet management, and no transactions

Tribler uses libsodium to generate dual key format keys. The problem is that the crypto libraries in Android (bouncycastle) does not support these dual format keys.

Possible TODO:

phone - phone import and export solution
phone -> pc export
tribler import
Use libsodium in Android?

devos50 · 2017-12-05T12:57:41Z

We already compiled libsodium for Android.

To use it, you should add the following code to your build.gradle:

sodium {
                binaries.withType(SharedLibraryBinary) {
                    sharedLibraryFile = file("src/main/jniLibs/armeabi-v7a/libsodium.so")
                }
            }

Note that it's only compiled for armv7 so it cannot be loaded on Intel-based devices. Also, you probably have to write some glue code (bindings) using JNI (or SWIG) to invoke methods in the libsodium.so file.

libsodium.so.zip

UPDATE: https://github.com/joshjdevl/libsodium-jni seems exactly what you want here 👍

RoelofSol · 2017-12-05T13:27:39Z

Meeting - Dec 5

We changed our Goal. We will transfer money from a PC to an Android

TODO

ONHOLD Pull request QR Code Backup system
Libsodium working on android.
Trustchain - Android chain Compatibility ( http://trustchain-android.readthedocs.io/en/latest/database.html )
Give all money Payment request PC -> Android

synctext · 2017-12-05T13:30:10Z

Sprint goal: empty a PC wallet to a fresh Android Trustchain wallet with protection against man-in-the-middle attacks.
Assume PC shows it's public IPv4:port and is connectable.

RoelofSol · 2017-12-05T13:35:20Z

Options

Generate Identity on PC, transfer money on pc ( spin up second dispensery) and Move it to the android.
Move PC identity to Android and generate new Identity
Create a transfer from PC to Android

RoelofSol · 2017-12-12T10:13:06Z

We are focusing on option 1.
( We are using the chain as a tool and are not ensuring the security/consistency of a specific usecase. )
The tickets are :

Spin up a second Tribler core
- create identity
- create exchange ( the Bandwidth currency )
Tribler: generate QR code with Key+Chain
Android: Chain + Key compatibility
- Android libsodium key
- Tribler libsodium key
Android: Read and save Key + Chain

PauluzzNL · 2017-12-12T13:02:32Z

Current Progress:

libsodium is integrated into the Android application (jni).
Old bouncycastle crypto implementation replaced.
Keys exported and re-imported in the application via QR.
Key importing should still be tested
Currently working on getting a second wallet to transfer the keys to on the computer.

Solved roadblocks:

QR encoding character set can be problematic when using binary data
Libsodium keys pulled out from dual key format
Android implementation rewritten to use libsodium at all callsites.

PauluzzNL · 2017-12-12T13:23:29Z

Progress for upcoming weeks:

Transfer identity to a new wallet
Import identity to Android phone
Export keys from Android to Android
Export identity from Android to Android

synctext · 2017-12-12T13:26:53Z

Status:

ToDo: Create new keypair in Tribler, sign coin transfer, and generate QR code
ToDo: Merge Android app enhancements with QR reading and private key replacement
Future sprints: Android-to-Android transfers like a wallet in Android app

RoelofSol · 2017-12-19T10:00:21Z

Dec 19
Done :

Create new keypair in Tribler, sign coin transfer, and generate QR code
Merge Android app enhancements with QR reading and private key replacement ( https://github.com/wkmeijer/CS4160-trustchain-android/pull/54 )
Future sprints: Android-to-Android transfers like a wallet in Android app

TODO :
Integration test Tribler -> Android

synctext · 2017-12-19T10:11:49Z

Progress:

QR code to scan with
- genesis block to create fresh chain on Android
- both private key and public key in QR
- replace existing chain on phone
- transaction "1" to fill it with funds from PC
{optionally fancy} GUI and android-to-android transfer
future sprint: use the QR code as a transport wallet
- no longer overwrite existing chain
- move incoming funds into local chain
- transaction "2" to fully empty transport wallet into existing Android wallet

RoelofSol · 2018-01-08T18:53:44Z

We are now tracking progress on https://github.com/orgs/blockchain-storage/projects/1

PauluzzNL · 2018-01-08T20:48:49Z

After importing the current QR code the block is currently directly inserted into the chain and the private key is overridden. Currently the 'chain' becomes 'corrupted' because of this, because the genesis block is missing (for now). So the history of previous blocks is now incorrect, as they were from a different keypair.

The better approach and first next goal is to actually transfer the transaction from the 'temporary block/identity' to the already existing wallet on the phone.

devbridie · 2018-01-08T21:21:50Z

For transactions that have associated coin data, an Activity has been created displaying the transaction data.

PauluzzNL · 2018-01-09T09:37:39Z

Current concept:

Create a new identity in Tribler and transfer the funds to the new identity. Replace the identity on the phone with the new identity. There are currently a few issues with this approach.

New Approach:

Create a temporary identity on the computer called 'temp'. Transfer the funds from the computer to this identity. Send the identity + transaction to the phone. On the phone, transfer the funds from the 'temp' identity to the identity of the phone.

synctext · 2018-01-09T10:56:08Z

Remarks and progress :

Binary QR codes are not easy. Is it UTF8, ANSI or Unicode? No compatibility between apps
The JSON high-density QR is quite a bit of size: 675 Byte with medium error correction.
Most time is spend understanding existing code and discussion in the team which design is best
Coding of solution is merely 10%. Design and debug is vast majority
External constrains are the big time-sink (QR, Android, Tribler, LibSodium, Dispersy, TriblerChain).
Merging upstream into main TrustChain app is still pending
impossible to do test-driven development:
- unknown where to go or how to do it at the project start
- original project description was too vage
- the solution is only discovered during (re-)development and multiple itterations
Stanford deadline: your work will be presented in some form on 26Jan.
ToDo next week: pretty transport transaction and transport identity

synctext · 2018-01-09T15:55:40Z

Final documentation is contribution to: http://trustchain-android.readthedocs.io/

PauluzzNL · 2018-01-11T12:46:36Z

Short overview of the block structure used for the throwaway transfer identity.

mitchellolsthoorn · 2018-01-11T13:45:31Z

Schematic overview of offline transaction with throw-away identity

We do not send all information of the zeroth block of the C node, because it will make the QR to big too display on a mobile phone.

Data sent:

sequence number
block_hash
private_key
Tx

mitchellolsthoorn · 2018-01-16T10:17:44Z

Beta version of the documentation: https://drive.google.com/open?id=1bQvnE0p48Zd2m9tBiCfNTQtZnYXVR4yS

This will be uploaded to the read the docs of the android app and put into the issue

mitchellolsthoorn · 2018-01-16T10:36:15Z

To be done/improved

Documentation (token, not currency)
Merge PR on android side
Merge PR on Tribler side
Change button name to 'Fully or Partial Empty funds into another account'
Change Warning to 'This is an one-way action and cannot be revered, if the QR code is not scanned the funds will be lost'
Tribler partial emptying in GUI
Android to Android offline emptying

The current PR's are #3358
https://github.com/wkmeijer/CS4160-trustchain-android/pull/54

synctext · 2018-01-16T10:39:02Z

wish list :

Stanford release PR
2 pictures for .PPT (16:9 aspect ratio)
stable .APK
final report and release
Android-to-Android coin transfer wallet-like

Final grading doc; PR to read-the-docs which should not exceed 5 pages including introduction with proper references, problem statement, high level description of the system, and reason for certain critical choices made in the design.

PauluzzNL · 2018-01-16T10:39:35Z

QR code to test the android functionality.

mitchellolsthoorn · 2018-01-16T10:43:34Z

Ideas for the pictures for the Stanford talk:

Android-to-Android offline transaction (showing the phone scanning the QR-code)
Tribler with the emptying button and the QR visible

devbridie · 2018-01-16T10:47:07Z

https://github.com/blockchain-storage/app/releases/tag/funds-preprealpha

mitchellolsthoorn · 2018-01-17T22:05:57Z

Screenshot of new partial emptying support on Tribler, new confirmation screens and changed wording

mitchellolsthoorn · 2018-01-17T22:11:19Z

Presentation image:

synctext · 2018-01-23T11:59:47Z

Stauts

nice refactoring of critical crypto code
offline Android-to-Android token transfer works
Final meeting: https://doodle.com/poll/ha9q5n8un4ftanec

RoelofSol · 2018-01-23T12:17:12Z

mitchellolsthoorn · 2018-01-23T12:24:28Z

Discovered problem during last sprint:

Verification on Android was not working because of the dualsecret key issues from changing the crypto library
(SOLVED: Because the old crypto system only used one key pair, instead of the current implementation's two, a special key format had to be applied, that not only contained the public key of the crypto key pair, but also the public key (verify key) from the signing key pair.)
Database constraint error from the double inserted blocks, because of failed connections
(SOLVED: using database check, to verify existence of block)

RoelofSol · 2018-01-23T14:57:55Z

Prettier usage gif

PauluzzNL · 2018-02-02T19:54:19Z

Here is our process report which also includes the technical information. We'll have one final pull request with documentation changes to the android master.

synctext · 2018-02-05T12:19:37Z

Quick comments used for final grading:

"you can see it, you can steal it" security model
code and engineering excellence
- devised an elegant solution to the QR transfer problem
- implemented an atomic single-QR code with throw-away identity
- identities of both sender and receiver are stable
- operational demo and double spending
- went through battle of the PRs
- replaced core crypto lib
- when scanning 1 QR code for second time, double spending attack detected, refuses to accept it, but no clear specific error.
documentation of Android seems to be stuck
readthedocs should auto-update, yet latest docs seem to be outdated
quality assurance
- normally it seems readthedocs is auto-updated
- code coverage for Android and Tribler
- Little Android testing, very GUI focussed
- Due to time constraint, no big mocking of JSON struct/QR down to see that valid blocks are created
- suggested future work: QR double spending checks when coming online

devos50 added the type: MSc course work label Nov 21, 2017

synctext assigned mitchellolsthoorn and PauluzzNL Nov 21, 2017

devos50 assigned RoelofSol, devbridie, mitchellolsthoorn, PauluzzNL and DavidGSB and unassigned mitchellolsthoorn and PauluzzNL Nov 21, 2017

mitchellolsthoorn mentioned this issue Dec 2, 2017

WIP: Added ability to export chain keys #3267

Closed

PauluzzNL closed this as completed Dec 12, 2017

PauluzzNL reopened this Dec 12, 2017

devos50 closed this as completed Mar 7, 2018

synctext mentioned this issue Mar 3, 2022

Blockchain Engineering - class of 2022 - Team FROST #6788

Closed

Build your own storagecoin - Group11 #3239

Build your own storagecoin - Group11 #3239

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