feat(types/chain): is_legacy helper

moving this into ethers-rs from foundry so it can be more easily use elsewhere
gakonst · Jan 27, 2022 · a36cee5 · a36cee5
1 parent a97526d
commit a36cee5
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/ethers-core/src/types/chain.rs b/ethers-core/src/types/chain.rs
@@ -110,3 +110,12 @@ impl FromStr for Chain {
         })
     }
 }
+
+impl Chain {
+    /// Helper function for checking if a chainid corresponds to a legacy chainid
+    /// without eip1559
+    pub fn is_legacy(&self) -> bool {
+        // TODO: Add other chains which do not support EIP1559.
+        matches!(self, Chain::Optimism | Chain::OptimismKovan | Chain::Fantom | Chain::FantomTestnet)
+    }
+}