This EIP renames the SELFDESTRUCT opcode to SENDALL, and replaces its functionality. The new functionality will be only to send all Ether in the account to the caller.
The SELFDESTRUCT opcode requires large changes to the state of an account, in particular removing all code and storage. This will not be possible in the future with Verkle trees: Each account will be stored in many different account keys, which will not be obviously connected to the root account.
This EIP implements this change. Applications that only use SELFDESTRUCT to retrieve funds will still work.
SELFDESTRUCT opcode is renamed to SENDALL, and now only immediately moves all ETH in the account to the target; it no longer destroys code or storage or alters the nonceSELFDESTRUCT are removedGetting rid of the SELFDESTRUCT opcode has been considered in the past, and there are currently no strong reasons to use it. Disabling it will be a requirement for statelessness.
This EIP requires a hard fork, since it modifies consensus rules.
Few applications are affected by this change. The only use that breaks is where a contract is re-created at the same address using CREATE2 (after a SELFDESTRUCT).
The following applications of SELFDESTRUCT will be broken and applications that use it in this way are not safe anymore:
SELFDESTRUCT is used to burn non-ETH token balances, such as EIP-20), inside a contract. We do not know of any such use (since it can easily be done by sending to a burn address this seems an unlikely way to use SELFDESTRUCT)CREATE2 is used to redeploy a contract in the same place. There are two ways in which this can fail:SELFDESTRUCT is used at the end of an operation to prevent others from doing this. This type of operation can easily be modified to not depend on SELFDESTRUCT.SELFDESTRUCT operation is used in order to make a contract upgradable. This is not supported anymore and delegates should be used.Copyright and related rights waived via CC0.