Hey, aka!
So cool you’re interested in Taiko tokenomics, thank you so much for that!
I’ll try to answer some of your questions, provide some resources, and we can continue the discussion further.
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“where the L1 tx fee” – it is calculated on Ethereum
To post a block to L1 and to post a proof of this block to L1, L2 uses regular L1 txs. So its cost is defined independently of L2 (in the same manner if you just want to make an L1 tx on your own in your wallet). -
Prover fee depends on specific prover design. For currently used stake-based tokenomics, the prover reward is defined by prover. That is, before joining as a prover, it claims “I am ready to generate proofs at this reward per gas R”.
However, R should be not less than 0.75% * F and not larger than 1.25% * F, where F is the current fee per gas, calculated as an average based on historical values.
You can check the detailed description of this design in section “Staking based proving design (Eldfell L3, Alpha-4 testnet)”.
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On your screenshot, green box is L2 tx fee, not L1.
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The diagram from whitepaper might be not very up-to-date already, as a lot of experiments with tokenomics take place. The note linked in the previous paragraph seems to be the most relevant right now. And we will do our best to provide more documentation soon
If you are interested in proving designs in general, check also this note.