Update tooling/types to incorporate chainID in domain separators.

packages/order-utils/src/constants.ts

@@ -100,12 +100,13 @@ export const constants = {
     INFINITE_TIMESTAMP_SEC: new BigNumber(2524604400), // Close to infinite
     ZERO_AMOUNT: new BigNumber(0),
     EXCHANGE_DOMAIN_NAME: '0x Protocol',
-    EXCHANGE_DOMAIN_VERSION: '2',
+    EXCHANGE_DOMAIN_VERSION: '3.0.0',
     DEFAULT_DOMAIN_SCHEMA: {
         name: 'EIP712Domain',
         parameters: [
             { name: 'name', type: 'string' },
             { name: 'version', type: 'string' },
+            { name: 'chainId', type: 'uint256' },
             { name: 'verifyingContract', type: 'address' },
         ],
     },

packages/order-utils/src/eip712_utils.ts

@@ -40,6 +40,7 @@ export const eip712Utils = {
             domain: {
                 name: domain.name === undefined ? constants.EXCHANGE_DOMAIN_NAME : domain.name,
                 version: domain.version === undefined ? constants.EXCHANGE_DOMAIN_VERSION : domain.version,
+                chainId: domain.chainId,
                 verifyingContract: domain.verifyingContractAddress,
             },
             message,

packages/types/src/index.ts

@@ -782,5 +782,6 @@ export interface PackageJSON {
 export interface EIP712DomainWithDefaultSchema {
     name?: string;
     version?: string;
+    chainId: number;
     verifyingContractAddress: string;
 }