feat: Add BSC constants (#1000)

Signed-off-by: Gerhard Steenkamp <gerhard@umaproject.org>
Co-authored-by: nicholaspai <npai.nyc@gmail.com>

Author: gsteenkamp89

src/utils/Multicall.ts

@@ -29,7 +29,7 @@ const NON_DETERMINISTIC_MULTICALL_ADDRESSES = {
 const DETERMINISTIC_MULTICALL_CHAINS = [
   CHAIN_IDs.ALEPH_ZERO,
   CHAIN_IDs.ARBITRUM,
-  CHAIN_IDs.BNB,
+  CHAIN_IDs.BSC,
   CHAIN_IDs.LINEA,
   CHAIN_IDs.MAINNET,
   CHAIN_IDs.POLYGON,

src/utils/NetworkUtils.ts

@@ -1,3 +1,4 @@
+import { CCTP_NO_DOMAIN } from "@across-protocol/constants";
 import { ChainFamily, CHAIN_IDs, MAINNET_CHAIN_IDs, PUBLIC_NETWORKS, TESTNET_CHAIN_IDs } from "../constants";
 
 export const hreNetworks: Record<number, string> = {
@@ -115,6 +116,15 @@ export function chainIsLinea(chainId: number): boolean {
   return [CHAIN_IDs.LINEA].includes(chainId);
 }
 
+/**
+ * Determines whether a chain ID is a BSC implementation.
+ * @param chainId Chain ID to evaluate.
+ * @returns True if chainId is a BSC chain, otherwise false.
+ */
+export function chainIsBSC(chainId: number): boolean {
+  return [CHAIN_IDs.BSC].includes(chainId);
+}
+
 /**
  * Determines whether a chain ID has a corresponding hub pool contract.
  * @param chainId Chain ID to evaluate.
@@ -149,19 +159,7 @@ export function chainIsSvm(chainId: number): boolean {
  * @returns True if chainId is a CCTP-bridging enabled chain, otherwise false.
  */
 export function chainIsCCTPEnabled(chainId: number): boolean {
-  return [
-    // Mainnets
-    CHAIN_IDs.ARBITRUM,
-    CHAIN_IDs.BASE,
-    CHAIN_IDs.OPTIMISM,
-    CHAIN_IDs.POLYGON,
-    CHAIN_IDs.UNICHAIN,
-    // Testnets
-    CHAIN_IDs.BASE_SEPOLIA,
-    CHAIN_IDs.OPTIMISM_SEPOLIA,
-    CHAIN_IDs.ARBITRUM_SEPOLIA,
-    CHAIN_IDs.POLYGON_AMOY,
-  ].includes(chainId);
+  return PUBLIC_NETWORKS?.[chainId]?.cctpDomain !== CCTP_NO_DOMAIN;
 }
 
 /**