Build a service that :

• gathers new delegations made on the Tezos protocol,
• exposes them through a public API.

The original assignement document can be viewed here.

Using Docker-compose, you can execute the following commands :

docker-compose up -d

• Using a local install of Go, you can execute the following commands :

cp .env.dist .env

• Set up your Environement Variables, then :

cd app/indexer
go build . -o indexer
./indexer

cd app/api
go build . -o api
./api

• The service will poll the new delegations from this Tzkt API endpoint: https://api.tzkt.io/#operation/Operations_GetDelegations
• For each delegation, save the following information: sender's address, timestamp, amount, and block.
• Expose the collected data through a public API at the endpoint /xtz/delegations.

  • The expected response format is:

    {
    "data": [ 
        {
            "timestamp": "2022-05-05T06:29:14Z",
            "amount": "125896",
            "delegator": "tz1a1SAaXRt9yoGMx29rh9FsBF4UzmvojdTL",
            "block": "2338084"
        },
        {
            "timestamp": "2021-05-07T14:48:07Z",
            "amount": "9856354",
            "delegator": "KT1JejNYjmQYh8yw95u5kfQDRuxJcaUPjUnf",
            "block": "1461334"
        }
    ],
    }

  • The sender’s address is the delegator.

  • The delegations must be listed most recent first.

  • The endpoint takes one optional query parameter year , which is specified in the format YYYY and will result in the data being filtered for that year only.

• Ensure the service is production-ready, considering factors like performance, scalability, error handling, and reliability.