https://blobs4every1.vercel.app/

In celebration of Dencun, I give you Blobs 4 Every 1

Note, this is as minimal a web app as I can build, cuz I'm a "core dev", not a "web dev".

It only works on Holesky, so please make sure you set your injected wallet to that testnet.

If you need some Holesky ETH, you can earn some here -

If you need some Holesky ETH, you can earn some here - https://holesky-faucet.pk910.de/

Since Metamask (and presumably all wallets) do not yet support blob transactions, this app has to do things in a kind of weird way

1.  Generate a blob transaction (using the input from the user as the blob)

2. Generate a signature for a brand new wallet (not private keys but the actual signature) - think of it as a one shot address/wallet

4. Submit the blob transaction to the network

5. Monitor the beacon chain and try to verify the blob is stored by a beacon node

Note, this doesn't always work exactly right, mainly because I'm not a master of calculating gas costs but it works end to end about 6 out of 10 times.

For best results, open your browser's dev console and watch the logs to follow the action.

The only really interesting thing about this web app is that it lets you post blobs from the browser, so if you want to run a rollup entirely manually where your blobs are just strings of text, this is for you

3. Prompts user to send enough ETH to the new address to hopefully cover the blob transaction