Add maxInitCodeSize txpool test

[Rjected]

Describe the feature

An edge case in geth's txpool implementation was recently found, and fixed in go-ethereum#26504. We should create a test for this case.

The intended behavior of the txpool is to reject transactions where the transaction is a contract creation and the tx.data exceeds maxInitCodeSize.

The maxInitCodeSize and maxCodeSize, a related constant, are listed in geth here:

	MaxCodeSize     = 24576           // Maximum bytecode to permit for a contract
	MaxInitCodeSize = 2 * MaxCodeSize // Maximum initcode to permit in a creation transaction and create instructions

Additional context

No response

[jinsankim]

I'm interested in taking this one.

[mattsse]

great,

there's a function that performs these checks:

reth/crates/transaction-pool/src/pool/txpool.rs

Lines 777 to 783 in 78ffd0a

	/// Additional checks for a new transaction.
	///
	/// This will enforce all additional rules in the context of this pool, such as:
	/// - Spam protection: reject new non-local transaction from a sender that exhausted its slot
	/// capacity.
	/// - Gas limit: reject transactions if they exceed a block's maximum gas.
	fn ensure_valid(

[onbjerg]

We need to make sure that the max_init_size is configurable for other networks

[mattsse]

good point, this should be part of the TransactionValidator impl trait, never the less we can use this as standalone function

[jinsankim]

Do I have to implement to check if initcode size is exceeded?
When I read the issue first, I thought this issue is just writing a test case. Of course, I'm still interested in it. I'm just like to get confirm whether I understand correctly.

[mattsse]

we'll likely move this check into the TransactionValidator trait, which is intended for protocol specific validation.

since maxInitCodeSize will always be checked, it should be a standalone function that is basically just pub fn ensure_max_init_code_size(code: Bytes, max)-> Result

so this should be pretty straight forward. It should go into the validate.rs file