blob-storage

Repo for BLOB storage (archive and serve data)

how to run ?

Prerequisite is to have docker engine up and running.

1. Start the mongoDB

cd local_docker && docker-compose up -d

2. Start the blob-catcher

cd cmd/blob_catcher && go run .

By default the above command starts the app from the latest block height. If we want to specifiy a previous blockheight, we can run it like:

cd cmd/blob_catcher && go run . -past_events=true -start_block=117452

2. Start the server - by default it listens on port 27001 (sets in config.go)

cd cmd/server && go run .

It uses the config from internal/logic/config.go.

how to test / use ?

When the DB, blob-catcher and server is running, the blob-catcher is outputting the blobHash to the terminal (with the networkName variable too, tho it is not written into the DB). Use that blobHash (including the 0x) in

1. Either in a curl command like this (you can query multiple blobHashes - comma separated - with one go and the result will be a respective array):

curl -X GET "http://localhost:27001/getBlob?blobHash=0x01a2a1cdc7ad221934061642a79a760776a013d0e6fa1a1c6b642ace009c372a,0xWRONG_HASH"

The result will be something like this:

{"data":[{"blob":"0x123...00","kzg_commitment":"0xabd68b406920aa74b83cf19655f1179d373b5a8cba21b126b2c18baf2096c8eb9ab7116a89b375546a3c30038485939e"}, {"blob":"NOT_FOUND","kzg_commitment":"NOT_FOUND"}]}

2. Or to backtest, use the simple python script below, after overwriting the blob_hash variable:

python3 python_query.py

todos

What is still missing is:

• small refinements and DevOps (prod-grade DB with creditentials, proper containerization)