From ab1e38701d40692be0f0e3f2939fda90084564af Mon Sep 17 00:00:00 2001
From: Leonid Logvinov <logvinov.leon@gmail.com>
Date: Mon, 9 Jul 2018 10:46:15 +0200
Subject: Add revert reason parsing to error handling decorator

---
 packages/contract-wrappers/src/utils/constants.ts  | 1 +
 packages/contract-wrappers/src/utils/decorators.ts | 5 +++++
 2 files changed, 6 insertions(+)

(limited to 'packages/contract-wrappers/src')

diff --git a/packages/contract-wrappers/src/utils/constants.ts b/packages/contract-wrappers/src/utils/constants.ts
index 76d805cac..039475b7f 100644
--- a/packages/contract-wrappers/src/utils/constants.ts
+++ b/packages/contract-wrappers/src/utils/constants.ts
@@ -4,6 +4,7 @@ export const constants = {
     NULL_ADDRESS: '0x0000000000000000000000000000000000000000',
     TESTRPC_NETWORK_ID: 50,
     INVALID_JUMP_PATTERN: 'invalid JUMP at',
+    REVERT: 'revert',
     OUT_OF_GAS_PATTERN: 'out of gas',
     INVALID_TAKER_FORMAT: 'instance.taker is not of a type(s) string',
     // tslint:disable-next-line:custom-no-magic-numbers
diff --git a/packages/contract-wrappers/src/utils/decorators.ts b/packages/contract-wrappers/src/utils/decorators.ts
index ccb4c6e11..6e77450e8 100644
--- a/packages/contract-wrappers/src/utils/decorators.ts
+++ b/packages/contract-wrappers/src/utils/decorators.ts
@@ -1,3 +1,4 @@
+import { RevertReason } from '@0xproject/types';
 import * as _ from 'lodash';
 
 import { AsyncMethod, ContractWrappersError, SyncMethod } from '../types';
@@ -13,6 +14,10 @@ const contractCallErrorTransformer = (error: Error) => {
     if (_.includes(error.message, constants.OUT_OF_GAS_PATTERN)) {
         return new Error(ContractWrappersError.OutOfGas);
     }
+    if (_.includes(error.message, constants.REVERT)) {
+        const revertReason = error.message.split(constants.REVERT)[1].trim();
+        return new Error(revertReason);
+    }
     return error;
 };
 
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