4 files changed, 32 insertions, 2 deletions
diff --git a/packages/web3-wrapper/CHANGELOG.json b/packages/web3-wrapper/CHANGELOG.json
index 624ad7151..f8b1dab85 100644
--- a/packages/web3-wrapper/CHANGELOG.json
+++ b/packages/web3-wrapper/CHANGELOG.json
@@ -1,6 +1,16 @@
 [
     {
         "timestamp": 1529397769,
+        "version": "0.7.2",
+        "changes": [
+            {
+                "note": "Add `getNodeTypeAsync` method",
+                "pr": 812
+            }
+        ]
+    },
+    {
+        "timestamp": 1529397769,
         "version": "0.7.1",
         "changes": [
             {
diff --git a/packages/web3-wrapper/package.json b/packages/web3-wrapper/package.json
index f12142d3c..2084cce73 100644
--- a/packages/web3-wrapper/package.json
+++ b/packages/web3-wrapper/package.json
@@ -68,7 +68,7 @@
         "@0xproject/typescript-typings": "^0.4.1",
         "@0xproject/utils": "^0.7.1",
         "bn.js": "^4.11.8",
-        "ethereum-types": "^0.0.1",
+        "ethereum-types": "^0.0.2",
         "ethereumjs-util": "^5.1.1",
         "ethers": "3.0.22",
         "lodash": "^4.17.4",
diff --git a/packages/web3-wrapper/src/index.ts b/packages/web3-wrapper/src/index.ts
index b14fa7406..66ef0a784 100644
--- a/packages/web3-wrapper/src/index.ts
+++ b/packages/web3-wrapper/src/index.ts
@@ -1,2 +1,2 @@
-export { Web3Wrapper, uniqueVersionIds } from './web3_wrapper';
+export { Web3Wrapper, uniqueVersionIds, NodeType } from './web3_wrapper';
 export { Web3WrapperErrors } from './types';
diff --git a/packages/web3-wrapper/src/web3_wrapper.ts b/packages/web3-wrapper/src/web3_wrapper.ts
index 29adb18ff..e56b99366 100644
--- a/packages/web3-wrapper/src/web3_wrapper.ts
+++ b/packages/web3-wrapper/src/web3_wrapper.ts
@@ -39,6 +39,12 @@ export const uniqueVersionIds = {
     ganache: 'EthereumJS TestRPC',
 };
 
+// NodeType represents the type of the backing Ethereum node.
+export enum NodeType {
+    Geth = 'GETH',
+    Ganache = 'GANACHE',
+}
+
 /**
  * An alternative to the Web3.js library that provides a consistent, clean, promise-based interface.
  */
@@ -595,6 +601,20 @@ export class Web3Wrapper {
         assert.isNumber('blockNumber', blockNumber);
         await this._sendRawPayloadAsync<void>({ method: 'debug_setHead', params: [web3Utils.toHex(blockNumber)] });
     }
+    /**
+     * Returns either NodeType.Geth or NodeType.Ganache depending on the type of
+     * the backing Ethereum node. Throws for any other type of node.
+     */
+    public async getNodeTypeAsync(): Promise<NodeType> {
+        const version = await this.getNodeVersionAsync();
+        if (_.includes(version, uniqueVersionIds.geth)) {
+            return NodeType.Geth;
+        } else if (_.includes(version, uniqueVersionIds.ganache)) {
+            return NodeType.Ganache;
+        } else {
+            throw new Error(`Unknown client version: ${version}`);
+        }
+    }
     private async _sendRawPayloadAsync<A>(payload: Partial<JSONRPCRequestPayload>): Promise<A> {
         const sendAsync = this._provider.sendAsync.bind(this._provider);
         const payloadWithDefaults = {