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Description

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In Hyperledger Iroha 1 has a great , while presenting a robust set of commands and queries, but some useful the absence of certain pertinent commands and queries are missing. Iroha 1 blockchain can be the core of banking systems, because it supports transactions, multiple currencies, etc. Nevertheless, advanced filtering of transactions is only partially available in Iroha 1, and it is necessary for banking systems. Currently to filter transactions, we need to return many of them and filter with our code - it is much heavier for both has been identified. As Hyperledger Iroha 1 positions itself as a foundational element for banking systems due to its support for transactions and multiple currencies, the current implementation exhibits limited advanced filtering capabilities for transactions, a crucial requirement for robust banking systems. Presently, the process of filtering transactions involves retrieving a substantial number of them and subsequently applying filters within our codebase. This approach, however, proves to be resource-intensive for both C++ Iroha's node and the Python client application.

During the As part of an ongoing internship project, queries should be extended with there is a strategic initiative to enhance the query functionality by introducing optional arguments:

Probably the most important param.. Probably the most important param creatorAccount This parameter is probably the easiest to implement.GetAccountTransactions

what	which queries	extra information	reason
Add optional argument, description	GetAccountAssetTransaction	Not present in the WSV database.		Sometimes we need to find transactions containing some text/words. It would be great if it would be possible to have multiple fragments in the query (e.g. when we want to find transactions in the bank, we use some words which we think would be there, but we are not sure what order).
Add optional argument, destinationAccount	GetAccountAssetTransaction	Not present in the WSV database	.	Sometimes we need to check all transactions sent to a specific account.
Add optional argument, sourceAccount	GetAccountAssetTransaction	Not present in the WSV database.	Sometimes we need to check all transactions sent from a specific account.
Add an optional argument,		GetAccountAssetTransaction, GetAccountTransactions	Send Title in AddAssetQuantity	Not present in the WSV database.	It is allowed to grant permission using can_transfer_my_asset. Also, the root user can transfer something from one account to another. We want to be able to list such transactions with a creatorAccount call.	Add optional argument, commandName		Introduce an optional title parameter to the AddAssetQuantity, enhancing functionality within Iroha Core for improved message communication. Ensure corresponding handling capabilities in Iroha CLI for seamless integration.
Add an optional argument, title	Send Title in SubtractAssetQuantity	Not present in the WSV database.	Sometimes we need to get a history of a specific command, e.g. AddAssetQuantity, GrantPermission.	Introduce an optional title parameter to the SubtractAssetQuantity, enhancing functionality within Iroha Core for improved message communication. Ensure corresponding handling capabilities in Iroha CLI for seamless integration.

GetAccountAssetTransaction has a parameter GetAccountAssetTransaction has a parameter account_id, which returns all transactions for the account; it is currently impossible to specify only the destination/source/tx creator account, so it needs to be fixed.

Optionally - there is a bug in Iroha 1 when we use ordering. However, this internship is connected to querying databases, so the mentee may be able to fix it.

If the mentee is unable to implement queries, they can add an An optional description to commands as an alternative: AddAssetQuantity and SubtractAssetQuantity ;can be implemented. Currently the information on why it was added or subtracted is unavailable. It can be hard to get help, though: HL Iroha 1 is not under active development.

After applying changes to queries/commands, Iroha client libraries should also be updated (probably regenerate code from the protocol buffers).
Client libraries:

• Iroha-python library
• Iroha-java library
• Iroha-javascript library
• Iroha-ios as a client library
• Iroha-cpp (embedded in Iroha core repository)

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• the core repository
• Iroha CLI as a command line interface

Additional Information

• Hyperledger Iroha 1 and 2 (documentation, wiki, source code, API documentation)
• Iroha-python library
• Iroha-java library
• Iroha-javascript library
• Iroha-ios library
• Iroha-cpp library
• Iroha 1 is not under active development anymore. It is not sure if the project will be active after a year. Iroha 1 has a community that is using the framework.

Learning Objectives

The mentee will be able to learn the following:

• the architecture of Iroha (1.x),
• work in the true spirit of open-source, communicating with the Iroha community, joining calls, etc.
• writing documentation,
• following rules of the open-source code of Hyperledger Iroha
• creating automatic tests of code

Expected Outcome

• Implementation according to description and plan of documentation and tests.
• Added the possibility of running modified queries from Iroha's client libraries.
• Present changes during the Iroha bi-weekly meeting at the end of the internship.

Relation to Hyperledger 

Hyperledger Iroha (documentation, wiki)

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Internship project which was adding extra command and queries in 2020: Making HL Iroha Data Model Modular for Interoperability with Other Projects

Mentee Skills

• Reading English documentation
• C++ advanced
• Git
• basic knowledge of Protobuf
• CMake
• Python, Java or JavaScript
• JSON
• Postgres and RocksDB

Mentee Open Source Contribution Experience

This project is dedicated to C++ developers, so candidates should attach a short video where they would say something about one of their previous projects.

Future plans

Adding those optional arguments would make it easier for future mentees to modify existing commands and queries or add more to Iroha 1.

Links

"Iroha 1: extend queries with optional arguments" mentorship page on the LFX platform.

Mentor(s) Names and Contact Info

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Grzegorz Bazior (AGH University of Science and Technology and Yonix Digital Systems)
email: bazior[you know what]agh.edu.pl
Telegram: @baziorek - preferred
Discord: baziorek#9186

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Aleksandr Petrosyan
email: petrosyan@soramitsu.co.jp
Telegram: @m3lcore

Andrzej Gruntowski
email: andrzejggru@gmail.com
Discord: Byte#5828