1 files changed, 22 insertions, 0 deletions
diff --git a/packages/contracts/src/utils/web3_wrapper.ts b/packages/contracts/src/utils/web3_wrapper.ts
index df9bf88c8..c475d96a9 100644
--- a/packages/contracts/src/utils/web3_wrapper.ts
+++ b/packages/contracts/src/utils/web3_wrapper.ts
@@ -1,8 +1,10 @@
 import { devConstants, env, EnvVars, web3Factory } from '@0xproject/dev-utils';
 import { prependSubprovider } from '@0xproject/subproviders';
+import { logUtils } from '@0xproject/utils';
 import { Web3Wrapper } from '@0xproject/web3-wrapper';
 
 import { coverage } from './coverage';
+import { profiler } from './profiler';
 
 enum ProviderType {
     Ganache = 'ganache',
@@ -45,9 +47,29 @@ const providerConfigs = testProvider === ProviderType.Ganache ? ganacheConfigs :
 
 export const provider = web3Factory.getRpcProvider(providerConfigs);
 const isCoverageEnabled = env.parseBoolean(EnvVars.SolidityCoverage);
+const isProfilerEnabled = env.parseBoolean(EnvVars.SolidityProfiler);
+if (isCoverageEnabled && isProfilerEnabled) {
+    throw new Error(
+        `Unfortunately for now you can't enable both coverage and profiler at the same time. They both use coverage.json file and there is no way to configure that.`,
+    );
+}
 if (isCoverageEnabled) {
     const coverageSubprovider = coverage.getCoverageSubproviderSingleton();
     prependSubprovider(provider, coverageSubprovider);
 }
+if (isProfilerEnabled) {
+    if (testProvider === ProviderType.Ganache) {
+        logUtils.warn(
+            "Gas costs in Ganache traces are incorrect and we don't recommend using it for profiling. Please switch to Geth",
+        );
+        process.exit(1);
+    }
+    const profilerSubprovider = profiler.getProfilerSubproviderSingleton();
+    logUtils.log(
+        "By default profilerSubprovider is stopped so that you don't get noise from setup code. Don't forget to start it before the code you want to profile and stop it afterwards",
+    );
+    profilerSubprovider.stop();
+    prependSubprovider(provider, profilerSubprovider);
+}
 
 export const web3Wrapper = new Web3Wrapper(provider);