Implement eth_feeHistory RPC method

[acolytec3]

We should implement the eth_feeHistory RPC method so that our client will be fully compatible with the testnet faucets which use feeHistory to construct their transactions. The Alchemy documentation is up to date so don't rely on the Ethereum.org RPC spec as it doesn't include the GasUsedRatio property in the response.

A stub implementation was included in #2316 to allow the Shandong testnet to proceed.

[scorbajio]

Does eth_feeHistory still need to be implemented? This ticket hasn't been updated in a while, is there any new context around this issue?

[acolytec3]

I'd say it's still open. We don't have an inventory need for it but always good to fill out missing rpc endpoints. May 30, 2023 7:48:15 PM Scorbajio ***@***.***>:

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Does *eth_feeHistory* still need to be implemented? This ticket hasn't been updated in a while, is there any new context around this issue? — Reply to this email directly, view it on GitHub[#2359 (comment)], or unsubscribe[https://github.com/notifications/unsubscribe-auth/AEENFXHEWM3U5JACPHADLJ3XI2BL7ANCNFSM6AAAAAARFN2WJM]. You are receiving this because you authored the thread.[Tracking image][https://github.com/notifications/beacon/AEENFXBIZB4HDQOIDAEMFY3XI2BL7A5CNFSM6AAAAAARFN2WJOWGG33NNVSW45C7OR4XAZNMJFZXG5LFINXW23LFNZ2KUY3PNVWWK3TUL5UWJTS5RFUAA.gif]

[holgerd77]

Closed by #3295