The eth_feeHistory called by default when calling eth_sendTransaction returns undefined

[sunchengzhu]

I noticed that when I use hardhat to call eth_sendTransaction, such as contract.deploy, if it is sent to a node that supports eip 1559(local hardhat node or goerli) , it will call eth_feeHistory, but it returns undefined.

The corresponding code logic is in _suggestEip1559FeePriceValues() of gas-providers.ts

[github-actions]

This issue is also being tracked on Linear.

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LINEAR-ID: 454495df-a38f-4d4b-9e0b-0374cc0cedcb

[fvictorio]

Hi @sunchengzhu, I'm not sure I understand the issue here. Is the Hardhat endpoint returning undefined for an eth_feeHistory call? Or is Hardhat sending an eth_feeHistory to another node, and getting undefined?

[sunchengzhu]

Hi @fvictorio,I mean eth_feeHistory in _suggestEip1559FeePriceValues() will return undefined when I send transaction to local hardhat node or goerli node
_suggestEip1559FeePriceValues() is called when using hardhat to send transactions, such as deploying contracts.

It is feasible to send eth_feeHistory to the node directly through the curl command

curl -X POST --data '{ "id": 1337, "jsonrpc": "2.0", "method": "eth_feeHistory", "params": ["0x1", "latest", []] }' http://127.0.0.1:8545

{"jsonrpc":"2.0","id":1337,"result":{"oldestBlock":"0x0","baseFeePerGas":["0x3b9aca00","0x342770c0"],"gasUsedRatio":[0]}}

[fvictorio]

Thanks a lot @sunchengzhu, this helped me find a very subtle bug.

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