bug(anvil): anvil_reset seems to not reset the addresses contract code

[Raiden1411]

Component

Anvil

Have you ensured that all of these are up to date?

• Foundry
• Foundryup

What version of Foundry are you on?

No response

What command(s) is the bug in?

anvil -f "FORK_URL" --port PORT --fork-block-number BLOCK_NUMBER

Operating System

Linux

Describe the bug

Running anvil_reset doesn't seem to reset the addresses contract code.

For example say that I ran anvil -f "FORK_URL" --port PORT --fork-block-number BLOCK_NUMBER where the FORK_URL is some eth mainnet endpoint and then running

curl -X POST \
      -H "Content-Type: application/json" \
      --data '{"jsonrpc":"2.0","method":"eth_call","params": [{"to": "0x16Fc5058F25648194471939df75CF27A2fdC48BC", "data": "0x54fd4d50"}, "latest"],"id":69}' \
      "http://localhost:6969/"

This results is {"jsonrpc":"2.0","id":69,"result":"0x"}

This is expected since 0x16Fc5058F25648194471939df75CF27A2fdC48BC is the portalAddress contract on Mainnet Sepolia.

However when running anvil_reset and then running the above curl command the result is the same {"jsonrpc":"2.0","id":69,"result":"0x"}

curl -X POST \
            -H "Content-Type: application/json" \
            --data '{"jsonrpc": "2.0", "id": 31337, "method": "anvil_reset", "params": [{"forking": {"jsonRpcUrl": "MAIN_NET_SEPOLIA_URL", "blockNumber":"6511079" }}]}' \
            "http://localhost:6969/"

This seems to be working as expected with Hardhat when using hardhat_reset where the result is instead
{"jsonrpc":"2.0","id":69,"result":"0x00000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000000000000000006332e31302e300000000000000000000000000000000000000000000000000000"} as it's the expected outcome when querying the contract on sepolia.

The address 0x16Fc5058F25648194471939df75CF27A2fdC48BC on mainnet doesn't contain contract code but then on Sepolia it does and I believe that this code is not being updated on the reset call.

This can be check with

curl -X POST \
           -H "Content-Type: application/json" \
           --data '{"jsonrpc": "2.0", "id": 31337, "method": "eth_getCode", "params": ["0x16Fc5058F25648194471939df75CF27A2fdC48BC", "latest"]}' \
           "http://localhost:6969"/

This results is {"jsonrpc":"2.0","id":31337,"result":"0x"}

I believe it might be because the fork creates a default storage but not entirely sure.

Not sure this is the intended behavior, but it would be great to have a similar behavior as hardhat_reset