Discuss the version without the irregular state change

spec/eof.md

@@ -115,8 +115,6 @@ Introduce new transaction type `InitcodeTransaction` which extends EIP-1559 (typ
 
 The `initcodes` can only be accessed via the `TXCREATE` instruction (see below), therefore `InitcodeTransactions` are intended to be sent to contracts including `TXCREATE` in their execution.
 
-We introduce a standardised Creator Contract (i.e. written in EVM, but existing at a known address, such as precompiles), which eliminates the need to have create transactions with empty `to`. Deployment of the Creator Contract will require an irregular state change at EOF activation block. Note that such introduction of the Creator Contract is needed, because only EOF contracts can create EOF contracts. See the appendix below for Creator Contract code.
-
 Under transaction validation rules `initcodes` are not validated for conforming to the EOF specification. They are only validated when accessed via `TXCREATE`. This avoids potential DoS attacks of the mempool. If during the execution of an `InitcodeTransaction` no `TXCREATE` instruction is called, such transaction is still valid.
 
 `initcodes` data is similar to calldata for two reasons:
@@ -165,11 +163,29 @@ Code executing within an EOF environment will behave differently than legacy cod
 - The instruction `JUMPDEST` is renamed to `NOP` and remains charging 1 gas without any effect.
     - Note: jumpdest-analysis is not performed anymore.
 - EOF contract may not deploy legacy code (it is naturally rejected on the code validation stage)
-- Legacy creation transactions (any tranactions with empty `to`) are invalid in case `data` contains EOF code (starts with `EF00` magic)
 - If instructions `CREATE` and `CREATE2` have EOF code as initcode (starting with `EF00` magic)
     - deployment fails (returns 0 on the stack)
     - caller's nonce is not updated and gas for initcode execution is not consumed
 
+#### Creation transactions
+
+Creation transactions (tranactions with empty `to`), with `data` containing EOF code (starting with `EF00` magic) are interpreted as having an EOF `initcontainer` in the `data` and:
+
+- intrinsic gas cost rules and limits defined in EIP-3860 for legacy creation transaction apply. The entire `initcontainer` is treated as initcode
+- **the initcontainer and all its subcontainers are validated recursively**
+- it is checked if the initcode container has its `len(data_section)` equal to `data_size`, i.e. data section content is exactly as the size declared in the header (see [Data section lifecycle](#data-section-lifecycle))
+- transaction fails if any of those checks were invalid (gas for initcode execution is not consumed. Only intrinsic creation transaction costs were consumed)
+- execute the container in "initcode-mode" and deduct gas for execution
+    - calldata is empty for this execution frame
+    - calculate `new_address` as `keccak256(sender || sender_nonce)[12:]`
+    - a successful execution ends with initcode executing `RETURNCONTRACT{deploy_container_index}(aux_data_offset, aux_data_size)` instruction (see below). After that:
+        - load deploy EOF subcontainer at `deploy_container_index` in the container from which `RETURNCONTRACT` is executed
+        - concatenate data section with `(aux_data_offset, aux_data_offset + aux_data_size)` memory segment and update data size in the header
+        - if updated deploy container size exceeds `MAX_CODE_SIZE` instruction exceptionally aborts
+        - set `state[new_address].code` to the updated deploy container
+    - `RETURN` and `STOP` are not allowed in "initcode-mode" (abort execution)
+- deduct `200 * deployed_code_size` gas
+
 **NOTE** Legacy contract and legacy creation transactions may not deploy EOF code, that is behavior from [EIP-3541](https://eips.ethereum.org/EIPS/eip-3541) is not modified.
 
 ### New Behavior
@@ -252,7 +268,8 @@ The following instructions are introduced in EOF code:
     - loads `uint8` immediate `deploy_container_index`
     - pops two values from the stack: `aux_data_offset`, `aux_data_size` referring to memory section that will be appended to deployed container's data
     - cost 0 gas + possible memory expansion for aux data
-    - ends initcode frame execution and returns control to `EOFCREATE` or `TXCREATE` caller frame where `deploy_container_index` and `aux_data` are used to construct deployed contract (see above)
+    - ends initcode frame execution and returns control to `EOFCREATE` or `TXCREATE` caller frame (unless called in the topmost frame of a creation transaction).
+    - `deploy_container_index` and `aux_data` are used to construct deployed contract (see above)
     - instruction exceptionally aborts if after the appending, data section size would overflow the maximum data section size or underflow (i.e. be less than data section size declared in the header)
     - instruction exceptionally aborts if invoked not in "initcode-mode"
 - `DATALOAD (0xd0)` instruction
@@ -354,37 +371,6 @@ The following instructions are introduced in EOF code:
 
 Annotated examples of EOF formatted containers demonstrating several key features of EOF can be found in [this test file within the `evmone` project repository](https://github.com/ethereum/evmone/blob/eof-examples/test/unittests/eof_example_test.cpp).
 
-## Appendix: Creator Contract
-
-```solidity
-{
-/// Takes [index][salt][init_data] as input,
-/// creates contract and returns the address or failure otherwise
-
-/// init_data.length can be 0, but the first 2 words are mandatory
-let size := calldatasize()
-if lt(size, 64) { revert(0, 0) }
-
-let tx_initcode_index := calldataload(0)
-let salt := calldataload(32)
-
-let init_data_size := sub(size, 64)
-calldatacopy(0, 64, init_data_size)
-
-let ret := txcreate(tx_initcode_index, callvalue(), salt, 0, init_data_size)
-if iszero(ret) { revert(0, 0) }
-
-mstore(0, ret)
-return(0, 32)
-
-// Helper to compile this with existing Solidity (with --strict-assembly mode)
-function txcreate(a, b, c, d, e) -> f {
-    f := verbatim_5i_1o(hex"ed", a, b, c, d, e)
-}
-    
-}
-```
-
 ## Appendix: Original EIPs
 
 These are the individual EIPs which evolved into this spec.