wip: clear delegations for anvil default accounts #10747
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yash-atreya
commented
Jun 10, 2025
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| if is_default_anvil_acc(address) && code.starts_with(&[0xef, 0x01, 0x00]) { | ||
| return Ok(Bytes::new()) | ||
| } | ||
| return Ok(code) |
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Returns empty bytes in case of eth_getCode
yash-atreya
commented
Jun 10, 2025
Comment on lines
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| if let Some(to) = request.to() { | ||
| if is_default_anvil_acc(to) { | ||
| // Applies StateOverride for default anvil account to wipe the delegation set on the | ||
| // forked chain. | ||
| let acc_override = | ||
| AccountOverride { code: Some(Bytes::new()), state: None, ..Default::default() }; | ||
| return Ok(self | ||
| .provider() | ||
| .call(request.clone()) | ||
| .block(block.into()) | ||
| .account_override(to, acc_override) | ||
| .await?) |
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Applies StateOverrides to eth_call request that reset the account code
grandizzy
reviewed
Jun 11, 2025
| let code = fork.get_code(address, number).await?; | ||
| // Resets the 7702 delegation code set on the default anvil account | ||
| if is_default_anvil_acc(address) && code.starts_with(&[0xef, 0x01, 0x00]) { | ||
| return Ok(Bytes::new()) |
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wouldn't be better to return the in memory self.backend.get_code(address, Some(block_request)).await one?
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Motivation
Since the advent of 7702, anvil default accounts have been delegated to drainers such as https://etherscan.io/address/0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266#authlist7702
This spoils DevX when users are running anvil in fork mode and use one of the default accounts.
This affects RPC calls such as
eth_getCode,eth_call, and any other account-related calls.Solution
WIP
This is encountered only when the RPC request
block_numberpredates thefork_block_number. Hence, every time we encounter such a scenario involving one of the default accounts, we can manually reset the code wiping the delegation or apply state overrides in case ofeth_call.Still some cleanup to do and also apply this to other RPC methods, but opening this for feedback on the approach.
cc @mattsse @grandizzy
PR Checklist