Since Hyperledger Iroha is moving toward its final release, the team of maintainers would like to have someone to help integrate Solidity VM from Hyperledger Burrow. It order to support the vision of Iroha as a simple and straightforward platform we want to build a visual language over Solidity in the future, similarly to Lego Mindstorm EV3 or Scratch environment:
We want users to be able to create decentralized applications securely and hassle-free.
Intern would get experience in virtual machines, Hyperledger Iroha internals, C++ and other technologies.
Integrated HL Burrow VM to Iroha
Relation to Hyperledger
Former experience with C++. Would be nice to have Solidity and VM skills/experience.
Build a visual programming language over the integrated virtual machine.
Preferred Hours and Length of Internship
Full- or part-time.
Mentor(s) Names and Contact Info
Andrei Lebedev, email@example.com, Soramitsu
Mentee Name and Contact Info
Ivan Tyulyandin, firstname.lastname@example.org, SPbU, Ivan Tyulyandin
The main purpose of this internship is to create an environment for smart contracts. Hyperledger Iroha developers would like to try different smart contract engines. One of them is Ethereum Virtual Machine from Hyperledger Burrow project. Intern Ivan Tyulyandin is working on the integration of it into Iroha.
- Add interaction with Burrow EVM using CGO and Golang compiler buildmode option
- Add new command inside Iroha to pass parameters to Burrow VM
- Develop a wrapper to connect Iroha and Burrow EVM
- Write EVM storage inside the wrapper
- Simulate EVM storage structure inside Iroha Postgres
- Develop C API to get data from Iroha
- Implement interaction between Burrow EVM and Postgres in the wrapper using the C API.
- Tests and integration
- Tests for the new command and data processing inside it
- Tests for interaction between Iroha and Burrow VM
- Integration tests
Since Burrow is written in Golang, there is the option to compile the source code of EVM (which is part of the Burrow project) into static library and C header file. It will be possible to use the header and the library inside Iroha C++ code. At this step, all data related to EVM is stored inside the wrapper.
Next milestone is to remove the EVM data storage from the wrapper to Iroha Postgres. It will let users perform queries about EVM state from Iroha.
Next steps (keep working on them):
- More integration tests (ERC-20 for example)
- User guide