5 files changed, 28 insertions, 1 deletions
diff --git a/packages/contract-wrappers/CHANGELOG.json b/packages/contract-wrappers/CHANGELOG.json
index f66be3f0a..c3d986b4a 100644
--- a/packages/contract-wrappers/CHANGELOG.json
+++ b/packages/contract-wrappers/CHANGELOG.json
@@ -37,6 +37,14 @@
                 "note":
                     "Removed ContractNotFound errors. Checking for this error was somewhat ineffecient. Relevant methods/functions now return the default error from web3-wrapper, which we feel provides enough information.",
                 "pr": 1105
+            },
+            {
+                "note": "Add `ForwarderWrapperError` to public interface",
+                "pr": 1147
+            },
+            {
+                "note": "Add `ContractWrapperError.SignatureRequestDenied` to public interface",
+                "pr": 1147
             }
         ],
         "timestamp": 1539871071
diff --git a/packages/contract-wrappers/src/index.ts b/packages/contract-wrappers/src/index.ts
index a38bd122b..d66ff5c9c 100644
--- a/packages/contract-wrappers/src/index.ts
+++ b/packages/contract-wrappers/src/index.ts
@@ -39,6 +39,7 @@ export { TransactionEncoder } from './utils/transaction_encoder';
 
 export {
     ContractWrappersError,
+    ForwarderWrapperError,
     IndexedFilterValues,
     BlockRange,
     ContractWrappersConfig,
diff --git a/packages/contract-wrappers/src/types.ts b/packages/contract-wrappers/src/types.ts
index 60750179f..5a5bdd530 100644
--- a/packages/contract-wrappers/src/types.ts
+++ b/packages/contract-wrappers/src/types.ts
@@ -18,6 +18,10 @@ export enum ExchangeWrapperError {
     AssetDataMismatch = 'ASSET_DATA_MISMATCH',
 }
 
+export enum ForwarderWrapperError {
+    CompleteFillFailed = 'COMPLETE_FILL_FAILED',
+}
+
 export enum ContractWrappersError {
     ContractNotDeployedOnNetwork = 'CONTRACT_NOT_DEPLOYED_ON_NETWORK',
     InsufficientAllowanceForTransfer = 'INSUFFICIENT_ALLOWANCE_FOR_TRANSFER',
@@ -30,6 +34,7 @@ export enum ContractWrappersError {
     SubscriptionAlreadyPresent = 'SUBSCRIPTION_ALREADY_PRESENT',
     ERC721OwnerNotFound = 'ERC_721_OWNER_NOT_FOUND',
     ERC721NoApproval = 'ERC_721_NO_APPROVAL',
+    SignatureRequestDenied = 'SIGNATURE_REQUEST_DENIED',
 }
 
 export enum InternalContractWrappersError {
diff --git a/packages/contract-wrappers/src/utils/constants.ts b/packages/contract-wrappers/src/utils/constants.ts
index 9ff61f62a..b89438592 100644
--- a/packages/contract-wrappers/src/utils/constants.ts
+++ b/packages/contract-wrappers/src/utils/constants.ts
@@ -14,4 +14,5 @@ export const constants = {
     ZERO_AMOUNT: new BigNumber(0),
     ONE_AMOUNT: new BigNumber(1),
     ETHER_TOKEN_DECIMALS: 18,
+    METAMASK_DENIED_SIGNATURE_PATTERN: 'MetaMask Tx Signature: User denied transaction signature',
 };
diff --git a/packages/contract-wrappers/src/utils/decorators.ts b/packages/contract-wrappers/src/utils/decorators.ts
index e17246015..932b11785 100644
--- a/packages/contract-wrappers/src/utils/decorators.ts
+++ b/packages/contract-wrappers/src/utils/decorators.ts
@@ -29,6 +29,14 @@ const schemaErrorTransformer = (error: Error) => {
     return error;
 };
 
+const signatureRequestErrorTransformer = (error: Error) => {
+    if (_.includes(error.message, constants.METAMASK_DENIED_SIGNATURE_PATTERN)) {
+        const errMsg = ContractWrappersError.SignatureRequestDenied;
+        return new Error(errMsg);
+    }
+    return error;
+};
+
 /**
  * Source: https://stackoverflow.com/a/29837695/3546986
  */
@@ -87,7 +95,11 @@ const syncErrorHandlerFactory = (errorTransformer: ErrorTransformer) => {
 };
 
 // _.flow(f, g) = f ∘ g
-const zeroExErrorTransformer = _.flow(schemaErrorTransformer, contractCallErrorTransformer);
+const zeroExErrorTransformer = _.flow(
+    schemaErrorTransformer,
+    contractCallErrorTransformer,
+    signatureRequestErrorTransformer,
+);
 
 export const decorators = {
     asyncZeroExErrorHandler: asyncErrorHandlerFactory(zeroExErrorTransformer),