feat(core): Utility to detect Shanghai-enabled chains

ethers-core/src/types/chain.rs

@@ -360,6 +360,17 @@ impl Chain {
         }
     }
 
+    /// Returns whether the chain supports the `PUSH0` opcode or not.
+    ///
+    /// For more information, see EIP-3855:
+    /// `<https://eips.ethereum.org/EIPS/eip-3855>`
+    pub const fn supports_push0(&self) -> bool {
+        match self {
+            Chain::Mainnet | Chain::Goerli | Chain::Sepolia => true,
+            _ => false,
+        }
+    }
+
     /// Returns the chain's blockchain explorer and its API (Etherscan and Etherscan-like) URLs.
     ///
     /// Returns `(API_URL, BASE_URL)`