web3ninja on Warpcast

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https://blobs4every1.vercel.app/ In celebration of Dencun, I give you Blobs 4 Every 1

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

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

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

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

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

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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

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

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4. Submit the blob transaction to the network

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

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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.

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

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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

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