ProviderError: Transaction gas limit is 30000000 and exceeds transaction gas cap of 16777216

[Amxx]

Version of Hardhat

2.27.1

What happened?

Using

• "hardhat": "^2.27.1"
• setting evm version to osaka

Whenever doing a operation (deploying a contract, sending a transaction, performing a call), without manually setting the gasLimit, the provider somehow sets the gasLimit to 30 million, which is no longer allowed since fusaka limits the size of every single transaction to 2**24.

Minimal reproduction steps

• set evm version to osaka
• start a hardhat node

npx hardhat node

• send an eth_estimateGas rpc call:

curl http://127.0.0.1:8545 -X POST -H "Content-Type: application/json" --data '{"method":"eth_estimateGas","params":[{"from":"0x8D97689C9818892B700e27F316cc3E41e17fBeb9","to":"0xd3CdA913deB6f67967B99D67aCDFa1712C293601"}],"id":1,"jsonrpc":"2.0"}'

output is

{"jsonrpc":"2.0","id":1,"error":{"code":-32000,"message":"transaction gas limit (30000000) is greater than the cap (16777216)","data":{"message":"transaction gas limit (30000000) is greater than the cap (16777216)","data":null}}}

Alternativelly

• Use this branch https://github.com/Amxx/openzeppelin-contracts/pull/new/update/use-0.8.31-clz
• npm ci
• npm test

Search terms

edr, osaka, gasLimit

[michalbrabec]

Hi Hadrien, thanks for the report, Hardhat 2 and 3 already support the Fusaka hardfork, but there is a bug in our runtime (EDR) we are fixing right now. We are also setting Fusaka as the default hardfork. We are preparing a bug fix release, the plan is to release today, but there are solc and revm dependencies we do not control which might delay us a bit. You can avoid this issue for the time being by sticking with prague hardfork, but that blocks you from using the CLZ opcode unfortunately.

[Amxx]

As soon as I was able to replicate the issue using curl on a node, I guessed it was probably on the EDR side and not an issue in the hardhat provider stack.

Good to know that a fix is comming, because on my end we are really looking toward testing the new opcode.

[michalbrabec]

There is a workaround that you can use, you can set the blockGasLimit: 16000000 for the network you are using. I have run your tests with this in place and all succeeded for me locally. The issue is caused by Hardhat setting the transaction gasLimit to blockGasLimit by default, EDR should override it for Osaka, but there is an issue we are fixing. Like so:

  networks: {
    hardhat: {
      hardfork: argv.evm,
      blockGasLimit: 16000000,
      // Exposed contracts often exceed the maximum contract size. For normal contract,
      // we rely on the `code-size` compiler warning, that will cause a compilation error.
      allowUnlimitedContractSize: true,
      initialBaseFeePerGas: argv.coverage ? 0 : undefined,
      enableRip7212: true,
    },
  },

[kanej]

The fix has been released: https://github.com/NomicFoundation/hardhat/releases/tag/hardhat%402.28.0