feat: add vm.getChain(chainAlias)

crates/cheatcodes/spec/src/lib.rs

@@ -83,6 +83,7 @@ impl Cheatcodes<'static> {
                 Vm::Wallet::STRUCT.clone(),
                 Vm::FfiResult::STRUCT.clone(),
                 Vm::ChainInfo::STRUCT.clone(),
+                Vm::Chain::STRUCT.clone(),
                 Vm::AccountAccess::STRUCT.clone(),
                 Vm::StorageAccess::STRUCT.clone(),
                 Vm::Gas::STRUCT.clone(),

crates/cheatcodes/spec/src/vm.rs

@@ -207,6 +207,18 @@ interface Vm {
         uint256 chainId;
     }
 
+    /// Information about a blockchain.
+    struct Chain {
+        /// The chain name.
+        string name;
+        /// The chain's Chain ID.
+        uint256 chainId;
+        /// The chain's alias. (i.e. what gets specified in `foundry.toml`).
+        string chainAlias;
+        /// A default RPC endpoint for this chain.
+        string rpcUrl;
+    }
+
     /// The storage accessed during an `AccountAccess`.
     struct StorageAccess {
         /// The account whose storage was accessed.
@@ -967,6 +979,10 @@ interface Vm {
     #[cheatcode(group = Testing, safety = Safe)]
     function rpcUrlStructs() external view returns (Rpc[] memory urls);
 
+    /// Returns a Chain struct for specific alias
+    #[cheatcode(group = Testing, safety = Safe)]
+    function getChain(string calldata chainAlias) external view returns (Chain memory chain);
+
     /// Suspends execution of the main thread for `duration` milliseconds.
     #[cheatcode(group = Testing, safety = Safe)]
     function sleep(uint256 duration) external;