feat(constant): add PRODUCT_IDS constant for price feed products

packages/constants/src/lib/constants/mappers.ts

@@ -11,9 +11,9 @@ const deprecated = depd('lit-js-sdk:constants:mappers');
  */
 export const NETWORK_CONTEXT_BY_NETWORK: {
   [key in LIT_NETWORK_VALUES]:
-    | typeof datilDev
-    | typeof datilTest
-    | typeof datil;
+  | typeof datilDev
+  | typeof datilTest
+  | typeof datil;
 } = {
   'datil-dev': datilDev,
   'datil-test': datilTest,
@@ -31,3 +31,16 @@ export const GLOBAL_OVERWRITE_IPFS_CODE_BY_NETWORK: {
   datil: false,
   custom: false,
 };
+
+/**
+ * Product IDs used for price feed and node selection
+ * 
+ * - DECRYPTION (0): Used for decryption operations
+ * - SIGN (1): Used for signing operations 
+ * - LA (2): Used for Lit Actions execution
+ */
+export const PRODUCT_IDS = {
+  DECRYPTION: 0, // For decryption operations
+  SIGN: 1, // For signing operations
+  LA: 2, // For Lit Actions execution
+} as const;

packages/contracts-sdk/src/lib/contracts-sdk.ts

@@ -65,6 +65,7 @@ import {
   ParamsMissingError,
   InvalidArgumentException,
   TransactionError,
+  PRODUCT_IDS,
 } from '@lit-protocol/constants';
 import { LogManager, Logger } from '@lit-protocol/logger';
 import { TokenInfo } from '@lit-protocol/types';
@@ -1254,9 +1255,11 @@ export class LitContracts {
   }) => {
     if (!productIds || productIds.length === 0) {
       log('No product IDs provided. Defaulting to 0');
-
-      // You should use all [0,1,2] because we fetch the price first to connect to the cheapest node. And after that the user calls the actual function
-      productIds = [0, 1, 2];
+      productIds = [
+        PRODUCT_IDS.DECRYPTION,
+        PRODUCT_IDS.LA,
+        PRODUCT_IDS.SIGN,
+      ]
     }
 
     const priceFeedContract = await LitContracts.getPriceFeedContract(