feat: relax chainspec bounds on NodeBuilder and rpc types (#11160)

crates/ethereum-forks/src/hardforks/ethereum.rs

@@ -52,6 +52,9 @@ pub trait EthereumHardforks: Hardforks {
         }
     }
 
+    /// Returns the final total difficulty if the Paris hardfork is known.
+    fn get_final_paris_total_difficulty(&self) -> Option<U256>;
+
     /// Returns the final total difficulty if the given block number is after the Paris hardfork.
     ///
     /// Note: technically this would also be valid for the block before the paris upgrade, but this

crates/ethereum-forks/src/hardforks/mod.rs

@@ -14,7 +14,7 @@ use alloc::{boxed::Box, vec::Vec};
 
 /// Generic trait over a set of ordered hardforks
 #[auto_impl::auto_impl(&, Arc)]
-pub trait Hardforks: Default + Clone {
+pub trait Hardforks: Clone {
     /// Retrieves [`ForkCondition`] from `fork`. If `fork` is not present, returns
     /// [`ForkCondition::Never`].
     fn fork<H: Hardfork>(&self, fork: H) -> ForkCondition;