dev-tools-truffle-example

An example truffle project showing how to use 0x dev tools with the Truffle framework.

Intro

First run yarn or npm i to install the dependencies.

This project contains two contracts. MetaCoin and SafeMath. MetaCoin is a coin-like contract where the owner of it initially has 1 token. SafeMath is called by MetaCoin to perform addition and substraction safely.

Tests

There is a single test that tries to send 2 tokens from the owner. Owner doesn't have enough tokens so it reverts.

Now we're ready to run the tests:

yarn test

They will fail and we'll get an error:

     Error: Transaction: 0x012d87cbbd7799ef361872571e75d37b7e53192161a1955ef5d6c97f1531d613 exited with an error (status 0).
     Please check that the transaction:
     - satisfies all conditions set by Solidity `require` statements.
     - does not trigger a Solidity `revert` statement.

Not very helpful. Now let's run it using @0x/sol-trace

Sol-trace

yarn trace

dev-tools-truffle-example/contracts/SafeMath.sol:12:8:
        require(b <= a)
dev-tools-truffle-example/contracts/MetaCoin.sol:13:25:
        SafeMath(safeMath).sub(balances[msg.sender], amount)

That's better. Now we don't need to check all the require and revert statements but we know exactly which one reverted and who called it.

Sol-coverage

yarn coverage

It will generate the HTML report and open it in the default browser. You can use any other istanbul reporter too. (text, json, etc.).

Sol-profiler

yarn profile

Sol-compiler

To test sol-compiler run

yarn sol-compiler

yarn sol-compiler:watch

Licence

Apache 2.0

alex-ppg/dev-tools-truffle-example