From 55b00ab3809973e385b6baffd9c44d6db5540b12 Mon Sep 17 00:00:00 2001
From: Fabio Berger <me@fabioberger.com>
Date: Tue, 30 May 2017 12:28:07 +0200
Subject: Add setProvider method to 0x.js that updates the web3 provider and
 invalidates any contractInstances instantiated with the old provider

---
 src/0x.js.ts        | 8 ++++++++
 src/web3_wrapper.ts | 3 +++
 2 files changed, 11 insertions(+)

diff --git a/src/0x.js.ts b/src/0x.js.ts
index 11dbe3058..4b7edc0e9 100644
--- a/src/0x.js.ts
+++ b/src/0x.js.ts
@@ -133,6 +133,14 @@ export class ZeroEx {
         this.web3Wrapper = new Web3Wrapper(web3);
         this.exchange = new ExchangeWrapper(this.web3Wrapper);
     }
+    /**
+     * Sets a new provider for the web3 instance used by 0x.js internally and invalidates any instantiated
+     * contract instances created with the old provider.
+     */
+    public setProvider(provider: Web3.Provider) {
+        this.web3Wrapper.setProvider(provider);
+        this.exchange.invalidateExchangeContract();
+    }
     /**
      * Signs an orderHash and returns it's elliptic curve signature
      * This method currently supports TestRPC, Geth and Parity above and below V1.6.6
diff --git a/src/web3_wrapper.ts b/src/web3_wrapper.ts
index 97d04db8c..a532085ce 100644
--- a/src/web3_wrapper.ts
+++ b/src/web3_wrapper.ts
@@ -9,6 +9,9 @@ export class Web3Wrapper {
         this.web3 = new Web3();
         this.web3.setProvider(web3.currentProvider);
     }
+    public setProvider(provider: Web3.Provider) {
+        this.web3.setProvider(provider);
+    }
     public isAddress(address: string): boolean {
         return this.web3.isAddress(address);
     }
-- 
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