`remix-debugger`

(Remix debugger has been deprecated and is not maintained anymore - the `remix-debug` module can be used to build your own debugger)

The Remix Debugger is a webapp to debug the Ethereum VM and transactions.

git clone https://github.com/ethereum/remix
cd remix/remix-debugger
npm install

This will build the debugger. Start it by opening index.html in your browser.

Run npm run start_dev to start a local webserver, accessible at http://127.0.0.1:8080. Your browser will reload when files are updated.

Once Remix is connected to a node, you will be able to debug transactions.

You can do that:

After loading the transaction succeeded, the hash, from and to field will show up. The VM trace is then loaded.

The debugger itself contains several controls that allow stepping over the trace and seing the current state of a selected step:

The slider allows to move quickly from a state to another.

Stepping actions are:

Step Into Back
Step Over Back
Step Over Forward
Step Into Forward
Jump Next Call: this will select the next state that refers to a context changes - CALL, CALLCODE, DELEGATECALL, CREATE.

The upper right panel contains basic informations about the current step:

The other 6 panels describe the current selected state:

Instructions list: list of all the instruction that defines the current executing code.
Stack
Storage Changes
Memory
Call Data$
Call Stack

To run unit tests, run npm test.
For local headless browser tests:
- To install selenium: npm run selenium-install
- Every time you want to run local browser tests, run: npm run test-browser