cosmscan/cosmscan-rs

(WIP) Cosmscan is indexer for cosmos based blockchain.

cosmscan-rs's Issues

Change server framework `hyper` to `actix-web`

we should change the hyper to actix-web for more productivity.

Use hyper uri parsing

url::Url::parse() func cannot parse uri string without base endpoint

Use `sqlx` instead of `diesel-rs`

After few days using diesel in our data store.

I feels that I cannot fully control what will happens to our database.

I decided to migrate from diesel-rs to sqlx

Serve REST API

• /block/{hash}
• /blocks?start=2&limit=50&sort=desc
• /blocks?top=50
• /txes_in_block/{hash}
• /tx/{hash}

Tendermint에는 기록되었는데 Cosmos에는 아직 기록되지 않은 시차 발생

Tendermint에 블록이 생성되자마자 블록에 담긴 트랜잭션을 코스모스 gRPC로 질의하면 에러가 나는 경우가 있음
원칙적으로는 Tendermint는 블록체인의 하위 레이어에 해당하고 코스모스는 상위레이어이니 이 둘 사이에 동기화 되는 시차가 약간 있는듯

Periodically fetch validator set

First Milestone API Server Implementation

Endpoints to be implemented.

• GET /api/chains

---

• GET /api/block/by_height/{height}
• GET /api/block/latest_height
• GET /api/block/list?skip=0&limit=50

---

• GET /api/transaction/{hash}
  • the response includes messages and events
• GET /api/transaction/list/by_height/{height}

e2e test environment

Provide a simpler way to test the services (engine and api-server) like below.

$ cd e2e
$ docker-compose up

Then it starts all the component we need to test.

Change concurrency package `tokio` -> `crossbeam`

Periodically fetch summary info from the blockchain

• Total Supply
• Ratio of Bonded / Unbonded
• Inflation rate
• Community pool size
• Number of active validators

Find a way to determine whether the transaction is succeeded or not

We could store the result of transaction which is categorized as succeded and failed.

Rename engine -> indexer

Configure CORS policy to be accessed from the different host

Background

API server is inherently designed as standalone server
It wouldn't contains any frontend sources

So, if frontend website is needed to access to our server
We must allow different host to access to the api server

Details

• Add allowed_host to the config.toml
  • "*" means any website, if specific host is needed, then wite hostname like http://localhost:3000/
• Write response with header Access-Control-Allow-Origin for each api handlers.