Back-end developer tech assignment

In this tech assignment your task is to create an API-server for blockchain indexes.

Base item is Group (Solidity smart contract code):

struct Group {
    string name;
    uint256[] indexes;
}

Group contains a list of ids. Each id represents index:

struct Index {
    uint256 id;
    string name;
    uint256 ethPriceInWei;
    uint256 usdPriceInCents;
    uint256 usdCapitalization;
    uint256 percentageChange;
}

You should deploy a smart contract on Sepolia (ETH test network) and create an API-server that will allow you to interact with the smart contract.

Contract ABI’s serve as an interface to the smart contract: https://github.com/HvrlK/abi-contract

You contract address should be like: 0xA655555555555555555555555555555555555555

You should implement next methods:

• GET groups/ (getGroupIds method in smart contract)
• GET groups/{groupId} (getGroup(groupId) method in smart contract)
• GET indexes/{indexId} (getIndex(indexId) method in smart contract)
• GET blocks/{BlockNumber | BlockHash | “latest“} (get block info from Sepolia)

Use fiber or any other golang framework. Create Swagger documentation.

The task was completed:

1. Deploy Smart Contract on Sepolia Testnet using Alchemy

See README.md in index_manager directory.

2. Blockchain API

API-server for blockchain indexes

Solution notes

• 🔱 clean architecture (handler->service->repository)
• 📖 standard Go project layout (well, more or less 😊)
• 💿 github CI/CD + docker compose + Makefile included
• ✅ handler tests with mocks included
• ❤️ Swagger auto-generated on make generate included

HOWTO

• 🏃‍♂️ run app in docker-compose with make dc
• 🧪 run tests with make test
• 🪙 generate contract from abi file with make abigen
• 🌻 run linter with make lint

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