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Hyperledger Solang is a Solidity compiler written in Rust. It currently targets Substrate contracts pallet (pallet-contractsPolkadot) and Solana smart contract runtimes. After successful compilation, users need to upload the compiled contract artifacts to a blockchain node, so it can be interacted with. At the time of writing, this needs to be done manually via third-party web front-ends. Which results in an inefficient and tiring process during iterative contract development.

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• Gather requirements and outline a generic interface that will be usable for both supported targets (Substrate and Solana).
• Implement the CLI as a sub-command commands for Solang:.
  
  • For the Substrate target;  cargo-contract already provides a CLI for node interactions (Substrate target), however it does not yet support Solidity contracts.
  • For the Solana target
• Describe the CLI in Solang's documentation.

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• Designing re-usable interfaces
• Analyzing and understanding code bases of reasonable sizes
• Refactoring existing components and implementing new features in Rust
• Contributing maintainable code to open source projects
• Getting proficient in working with tools like git

Additionally, students will learn about smart contracts, Substrate and Solana in general.

Expected Outcome

• Solang provides a working and documented CLI for node interactions with Substrate and Solana. Options for sub-commands (like RPC end-point, account to use, dry-run flag, gas limits, verbosity and other specific options) must be configurable by the user.
  
  • A sub-command for uploading contracts.
  • A sub-command for instantiating contracts.
  • A sub-command for calling contract functions. This command must correctly encode transaction input, display and show the calls output and debug output as well as emitted events.
  • A sub-command for listening to emitted events.
• The student should factor the relevant parts of cargo-contract out into a dedicated library (crate) to make it usable in Solang.
• Developed source code is of adequate quality, merged in the projects upstream repositories and have undergone common Pull Request processes.

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