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Abhishek Yadav
@abhixh
How do you calculate maxFeePerGas on Scroll and Mantle because they do not return maxFeePerGas and maxPriorityFeePerGas when fetching fee data?
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Steve
@stevedylandev.eth
Following this one; I haven’t been able to use scroll reliably on testnet so far :(
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Abhishek Yadav
@abhixh
Figured how to make it work on Scroll, Mantle not yet.
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Steve
@stevedylandev.eth
What’s the key?? 👀👀
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Abhishek Yadav
@abhixh
Started with the bare basics: maxFeePerGas = baseFeePerGas + maxPriorityFeePerGas if we know the two right hand side variables then we can calculate maxFeePerGas.
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Abhishek Yadav
@abhixh
The problem was since the RPC doesn’t return any value it’s difficult to even estimate baseFeePerGas which should be of the preceding block.
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Abhishek Yadav
@abhixh
But the network is live and blocks are being processed which means it’s the RPC that’s at fault. We decided to fetch baseFeePerGas from a different method. This was interesting https://github.com/ethers-io/ethers.js/discussions/3601
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Abhishek Yadav
@abhixh
“it simply multiplies the base fee by 2 and then adds the miner’s tip (maxPriorityFeePerGas)” Since the networks are actually working lastBaseFeePerGas cannot be null. Or unless the RPCs do not have a way to deconstruct the original equation and get the different values back.
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