add ensure_transaction_root_valid method for SealedBlock

[tcoratger]

Description

This pull request introduces a new method, ensure_transaction_root_valid, for the SealedBlock type. The method checks whether the transaction root in the block header is valid. The transaction root is verified by comparing it with the calculated Keccak 256-bit hash of the root node of the trie structure populated with each transaction in the transactions list portion of the block.

Changes Made

• Added ensure_transaction_root_valid method to the SealedBlock type.

Usage

The new method returns a Result<(), GotExpected<B256>>, where success (Ok(())) indicates a valid transaction root, and an error (Err) contains details about the unexpected root.

Example

// Assuming `block` is an instance of `SealedBlock`
match block.ensure_transaction_root_valid() {
    Ok(()) => println!("Transaction root is valid."),
    Err(error) => println!("Transaction root check failed: {:?}", error),
}

[mattsse]

sweet!

tysm!