protocol/packages/dev-tools-pages/ts/pages/profiler.tsx

import * as React from 'react';
import { hydrate, render } from 'react-dom';
import * as Loadable from 'react-loadable';

import { context } from 'ts/context/profiler';

import { Base } from 'ts/components/base';
import { Breakout } from 'ts/components/breakout';
import { Code } from 'ts/components/code';
import { Content } from 'ts/components/content';
import { ContentBlock } from 'ts/components/content-block';
import { Hero } from 'ts/components/hero';
import { InlineCode } from 'ts/components/inline-code';
import { Intro, IntroAside, IntroLead } from 'ts/components/intro';
import { List, ListItem } from 'ts/components/list';
import { TabBlock, Tabs } from 'ts/components/tabs';

const Animation = Loadable({
    loader: () => System.import(/* webpackChunkName: 'profiler-animation' */ 'ts/components/animations/profiler'),
    loading: () => <div />,
    delay: 1000,
    render(loadable: { ProfilerAnimation: any }): React.ReactNode {
        const Component = loadable.ProfilerAnimation;
        return <Component />;
    },
});

const Profiler: React.StatelessComponent<{}> = () => (
    <Base context={context}>
        <Hero>
            <Animation />
        </Hero>
        <Intro>
            <IntroLead title="Outline gas usage">
                <p>
                    Sol-profiler gathers line-by-line gas usage for any transaction submitted through your provider.
                    This will help you find unexpected inefficiencies in parts of your smart contract, and take a
                    data-driven approach to optimizing it.
                </p>
            </IntroLead>
            <IntroAside>
                <Code
                    language="javascript"
                    isDiff={true}
                    gutterLength={6}
                    gutter={[15, 15, undefined, 21747, 20303, 1435]}
                >
                    {`+function() public payable {
+    deposit();
}
+function deposit() public payabble {
+    balanceOf[msg.sender] += msg.value;
+    Deposit(msg.sender, msg.value);
}
-function withdraw(uint wad) public {
-    require(balanceOf[msg.sender] >= wad);
-    balanceOf[msg.sender] -= wad;
-    msg.sender.transfer(wad);
-    Withdrawal(msg.sender, wad);
}`}
                </Code>
            </IntroAside>
        </Intro>
        <Content>
            <ContentBlock main={true} title="Get started" />
            <ContentBlock title="Prerequisites">
                <List>
                    <ListItem>
                        Use <a href="#">ganache-cli</a> as a backing node.
                    </ListItem>
                    <ListItem>
                        Understand and use <a href="#">web3-provider-engine</a>.
                    </ListItem>
                </List>
            </ContentBlock>
            <ContentBlock title="Installation">
                <Breakout>
                    <Code>npm install @0x/sol-trace --save</Code>
                </Breakout>

                <p>
                    Sol-trace is a subprovider that needs to be prepended to your <a href="#">provider engine</a>.
                    Depending on your project setup, you will need to use a specific ArtifactAdapter. Sol-trace ships
                    with the <InlineCode>SolCompilerArtifactAdapter</InlineCode> for use with{' '}
                    <a href="#">Sol-compiler</a> and <InlineCode>TruffleArtifactAdapter</InlineCode> for use with the{' '}
                    <a href="#">Truffle framework</a>. You can also write your own and support any artifact format.
                </p>

                <Tabs>
                    <TabBlock title="Sol-compiler">
                        <Code language="javascript">
                            {`import { SolCompilerArtifactAdapter } from '@0x/sol-trace';

// Both artifactsDir and contractsDir are optional and will be fetched from compiler.json if not passed in
const artifactAdapter = new SolCompilerArtifactAdapter(artifactsDir, contractsDir);`}
                        </Code>
                    </TabBlock>
                    <TabBlock title="Truffle">
                        <Code language="javascript">
                            {`import { TruffleArtifactAdapter } from '@0x/sol-trace';

const projectRoot = '.';
const solcVersion = '0.4.24';
const artifactAdapter = new TruffleArtifactAdapter(projectRoot, solcVersion);`}
                        </Code>
                    </TabBlock>
                    <TabBlock title="Custom">
                        <Code language="javascript">
                            {`import { AbstractArtifactAdapter } from '@0x/sol-trace';

class YourCustomArtifactsAdapter extends AbstractArtifactAdapter {...};
const artifactAdapter = new YourCustomArtifactsAdapter(...);`}
                        </Code>
                    </TabBlock>
                </Tabs>
                <p>
                    Now that we have an <InlineCode>artifactAdapter</InlineCode>, we can create a{' '}
                    <InlineCode>RevertTraceSubprovider</InlineCode> and append it to our provider engine.
                </p>

                <Breakout>
                    <Code language="javascript">
                        {`import { ProviderEngine, RpcSubprovider } from 'web3-provider-engine';
import { RevertTraceSubprovider } from '@0x/sol-cov';

const defaultFromAddress = "..."; // Some ethereum address with test funds
const revertTraceSubprovider = new RevertTraceSubprovider(artifactAdapter, defaultFromAddress);

const providerEngine = new ProviderEngine();
providerEngine.addProvider(revertTraceSubprovider);
providerEngine.addProvider(new RpcSubprovider({rpcUrl: 'http://localhost:8545'}));
providerEngine.start();`}
                    </Code>
                </Breakout>
            </ContentBlock>
        </Content>
    </Base>
);

const root = document.getElementById('app');

if (root.hasChildNodes()) {
    hydrate(<Profiler />, root);
} else {
    render(<Profiler />, root);
}