Invalid value undefined supplied to : RpcBlockWithTransactions | null/totalDifficulty: QUANTITY

[0xmichalis]

Version of Hardhat

2.19.5

What happened?

Forking a Base Sepolia node has started failing with the following error:

Errors: Invalid value undefined supplied to : RpcBlockWithTransactions | null/totalDifficulty: QUANTITY

Minimal reproduction steps

git clone https://github.com/0xmichalis/hardhat-5986-repro
cd hardhat-5986-repro
npm i
npx hardhat test

Search terms

No response

[0xmichalis]

Seems to work fine with the latest Hardhat version (2.22.16)

[0xmichalis]

This has started happening since today. It'd be great to understand whether there is a workaround we can apply without changing versions as it's hard to do that at the moment (upgrading breaks our tests for some reason).

[aspiers]

Wild guess this is the same as #5816 which was fixed in v2.22.14.

[aspiers]

See also #2106 and #2313 although those are much older and no longer valid.

[aspiers]

Looks like OpenZeppelin Defender just got bitten with the same issue 😆

[aspiers]

Although to be more precise, they can't be relying on hardhat from within their frontend. I'm guessing that the commonality is maybe NomicFoundation/edr#696, since the hardhat fix was just to bump EDR to 0.6.4 to incorporate a fix for that.