10 files changed, 291 insertions, 0 deletions
diff --git a/packages/sol-profiler/.npmignore b/packages/sol-profiler/.npmignore
new file mode 100644
index 000000000..037786e46
--- /dev/null
+++ b/packages/sol-profiler/.npmignore
@@ -0,0 +1,6 @@
+.*
+yarn-error.log
+/src/
+/scripts/
+tsconfig.json
+/lib/src/monorepo_scripts/
diff --git a/packages/sol-profiler/CHANGELOG.json b/packages/sol-profiler/CHANGELOG.json
new file mode 100644
index 000000000..ca6048d99
--- /dev/null
+++ b/packages/sol-profiler/CHANGELOG.json
@@ -0,0 +1,12 @@
+[
+    {
+        "version": "1.0.0",
+        "changes": [
+            {
+                "note":
+                    "Initial release as a separate package. For historic entries check @0x/sol-trace-based-tools-common",
+                "pr": 1492
+            }
+        ]
+    }
+]
diff --git a/packages/sol-profiler/README.md b/packages/sol-profiler/README.md
new file mode 100644
index 000000000..44fa29e3f
--- /dev/null
+++ b/packages/sol-profiler/README.md
@@ -0,0 +1,75 @@
+## @0x/sol-profiler
+
+Solidity line-by-line gas profiler.
+
+### Read the [Documentation](https://0xproject.com/docs/sol-profiler).
+
+## Installation
+
+```bash
+yarn add @0x/sol-profiler
+```
+
+**Import**
+
+```javascript
+import { ProfilerSubprovider } from '@0x/sol-profiler';
+```
+
+or
+
+```javascript
+var ProfilerSubprovider = require('@0x/sol-profiler').ProfilerSubprovider;
+```
+
+## Contributing
+
+We welcome improvements and fixes from the wider community! To report bugs within this package, please create an issue in this repository.
+
+Please read our [contribution guidelines](../../CONTRIBUTING.md) before getting started.
+
+### Install dependencies
+
+If you don't have yarn workspaces enabled (Yarn < v1.0) - enable them:
+
+```bash
+yarn config set workspaces-experimental true
+```
+
+Then install dependencies
+
+```bash
+yarn install
+```
+
+### Build
+
+To build this package and all other monorepo packages that it depends on, run the following from the monorepo root directory:
+
+```bash
+PKG=@0x/sol-profiler yarn build
+```
+
+Or continuously rebuild on change:
+
+```bash
+PKG=@0x/sol-profiler yarn watch
+```
+
+### Clean
+
+```bash
+yarn clean
+```
+
+### Lint
+
+```bash
+yarn lint
+```
+
+### Run Tests
+
+```bash
+yarn test
+```
diff --git a/packages/sol-profiler/package.json b/packages/sol-profiler/package.json
new file mode 100644
index 000000000..03b421b0e
--- /dev/null
+++ b/packages/sol-profiler/package.json
@@ -0,0 +1,50 @@
+{
+    "name": "@0x/sol-profiler",
+    "version": "1.0.0",
+    "engines": {
+        "node": ">=6.12"
+    },
+    "description": "Generate profiler reports for Solidity code",
+    "main": "lib/src/index.js",
+    "types": "lib/src/index.d.ts",
+    "scripts": {
+        "build": "tsc -b",
+        "build:ci": "yarn build",
+        "lint": "tslint --format stylish --project .",
+        "clean": "shx rm -rf lib src/artifacts generated_docs",
+        "docs:json": "typedoc --excludePrivate --excludeExternals --target ES5 --tsconfig typedoc-tsconfig.json --json $JSON_FILE_PATH $PROJECT_FILES"
+    },
+    "config": {
+        "postpublish": {
+            "assets": []
+        }
+    },
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/0xProject/0x-monorepo.git"
+    },
+    "license": "Apache-2.0",
+    "bugs": {
+        "url": "https://github.com/0xProject/0x-monorepo/issues"
+    },
+    "homepage": "https://github.com/0xProject/0x-monorepo/packages/sol-profiler/README.md",
+    "dependencies": {
+        "@0x/subproviders": "^2.1.8",
+        "@0x/typescript-typings": "^3.0.6",
+        "@0x/sol-trace-based-tools-common": "^2.1.16",
+        "ethereum-types": "^1.1.4",
+        "lodash": "^4.17.5"
+    },
+    "devDependencies": {
+        "@0x/tslint-config": "^2.0.0",
+        "@types/node": "*",
+        "npm-run-all": "^4.1.2",
+        "shx": "^0.2.2",
+        "tslint": "5.11.0",
+        "typedoc": "0.13.0",
+        "typescript": "3.0.1"
+    },
+    "publishConfig": {
+        "access": "public"
+    }
+}
diff --git a/packages/sol-profiler/src/globals.d.ts b/packages/sol-profiler/src/globals.d.ts
new file mode 100644
index 000000000..e799b3529
--- /dev/null
+++ b/packages/sol-profiler/src/globals.d.ts
@@ -0,0 +1,7 @@
+// tslint:disable:completed-docs
+declare module '*.json' {
+    const json: any;
+    /* tslint:disable */
+    export default json;
+    /* tslint:enable */
+}
diff --git a/packages/sol-profiler/src/index.ts b/packages/sol-profiler/src/index.ts
new file mode 100644
index 000000000..b36ed5baa
--- /dev/null
+++ b/packages/sol-profiler/src/index.ts
@@ -0,0 +1,25 @@
+export {
+    AbstractArtifactAdapter,
+    SolCompilerArtifactAdapter,
+    TruffleArtifactAdapter,
+    ContractData,
+} from '@0x/sol-trace-based-tools-common';
+
+// HACK: ProfilerSubprovider is a hacky way to do profiling using coverage tools. Not production ready
+export { ProfilerSubprovider } from './profiler_subprovider';
+
+export {
+    JSONRPCRequestPayload,
+    Provider,
+    JSONRPCErrorCallback,
+    JSONRPCResponsePayload,
+    JSONRPCResponseError,
+} from 'ethereum-types';
+
+export {
+    JSONRPCRequestPayloadWithMethod,
+    NextCallback,
+    ErrorCallback,
+    OnNextCompleted,
+    Callback,
+} from '@0x/subproviders';
diff --git a/packages/sol-profiler/src/profiler_subprovider.ts b/packages/sol-profiler/src/profiler_subprovider.ts
new file mode 100644
index 000000000..61dc25b6b
--- /dev/null
+++ b/packages/sol-profiler/src/profiler_subprovider.ts
@@ -0,0 +1,98 @@
+import * as _ from 'lodash';
+
+import {
+    AbstractArtifactAdapter,
+    collectCoverageEntries,
+    ContractData,
+    Coverage,
+    SingleFileSubtraceHandler,
+    SourceRange,
+    Subtrace,
+    TraceCollector,
+    TraceInfo,
+    TraceInfoSubprovider,
+    utils,
+} from '@0x/sol-trace-based-tools-common';
+
+/**
+ * This class implements the [web3-provider-engine](https://github.com/MetaMask/provider-engine) subprovider interface.
+ * ProfilerSubprovider is used to profile Solidity code while running tests.
+ */
+export class ProfilerSubprovider extends TraceInfoSubprovider {
+    private readonly _profilerCollector: TraceCollector;
+    /**
+     * Instantiates a ProfilerSubprovider instance
+     * @param artifactAdapter Adapter for used artifacts format (0x, truffle, giveth, etc.)
+     * @param defaultFromAddress default from address to use when sending transactions
+     * @param isVerbose If true, we will log any unknown transactions. Otherwise we will ignore them
+     */
+    constructor(artifactAdapter: AbstractArtifactAdapter, defaultFromAddress: string, isVerbose: boolean = true) {
+        const traceCollectionSubproviderConfig = {
+            shouldCollectTransactionTraces: true,
+            shouldCollectGasEstimateTraces: false,
+            shouldCollectCallTraces: false,
+        };
+        super(defaultFromAddress, traceCollectionSubproviderConfig);
+        this._profilerCollector = new TraceCollector(artifactAdapter, isVerbose, profilerHandler);
+    }
+    protected async _handleTraceInfoAsync(traceInfo: TraceInfo): Promise<void> {
+        await this._profilerCollector.computeSingleTraceCoverageAsync(traceInfo);
+    }
+    /**
+     * Write the test profiler results to a file in Istanbul format.
+     */
+    public async writeProfilerOutputAsync(): Promise<void> {
+        await this._profilerCollector.writeOutputAsync();
+    }
+}
+
+/**
+ * Computed partial coverage for a single file & subtrace for the purposes of
+ * gas profiling.
+ * @param contractData      Contract metadata (source, srcMap, bytecode)
+ * @param subtrace          A subset of a transcation/call trace that was executed within that contract
+ * @param pcToSourceRange   A mapping from program counters to source ranges
+ * @param fileIndex         Index of a file to compute coverage for
+ * @return Partial istanbul coverage for that file & subtrace
+ */
+export const profilerHandler: SingleFileSubtraceHandler = (
+    contractData: ContractData,
+    subtrace: Subtrace,
+    pcToSourceRange: { [programCounter: number]: SourceRange },
+    fileIndex: number,
+): Coverage => {
+    const absoluteFileName = contractData.sources[fileIndex];
+    const profilerEntriesDescription = collectCoverageEntries(contractData.sourceCodes[fileIndex]);
+    const gasConsumedByStatement: { [statementId: string]: number } = {};
+    const statementIds = _.keys(profilerEntriesDescription.statementMap);
+    for (const statementId of statementIds) {
+        const statementDescription = profilerEntriesDescription.statementMap[statementId];
+        const totalGasCost = _.sum(
+            _.map(subtrace, structLog => {
+                const sourceRange = pcToSourceRange[structLog.pc];
+                if (_.isUndefined(sourceRange)) {
+                    return 0;
+                }
+                if (sourceRange.fileName !== absoluteFileName) {
+                    return 0;
+                }
+                if (utils.isRangeInside(sourceRange.location, statementDescription)) {
+                    return structLog.gasCost;
+                } else {
+                    return 0;
+                }
+            }),
+        );
+        gasConsumedByStatement[statementId] = totalGasCost;
+    }
+    const partialProfilerOutput = {
+        [absoluteFileName]: {
+            ...profilerEntriesDescription,
+            path: absoluteFileName,
+            f: {}, // I's meaningless in profiling context
+            s: gasConsumedByStatement,
+            b: {}, // I's meaningless in profiling context
+        },
+    };
+    return partialProfilerOutput;
+};
diff --git a/packages/sol-profiler/tsconfig.json b/packages/sol-profiler/tsconfig.json
new file mode 100644
index 000000000..233008d61
--- /dev/null
+++ b/packages/sol-profiler/tsconfig.json
@@ -0,0 +1,8 @@
+{
+    "extends": "../../tsconfig",
+    "compilerOptions": {
+        "outDir": "lib",
+        "rootDir": "."
+    },
+    "include": ["./src/**/*"]
+}
diff --git a/packages/sol-profiler/tslint.json b/packages/sol-profiler/tslint.json
new file mode 100644
index 000000000..dd9053357
--- /dev/null
+++ b/packages/sol-profiler/tslint.json
@@ -0,0 +1,3 @@
+{
+    "extends": ["@0x/tslint-config"]
+}
diff --git a/packages/sol-profiler/typedoc-tsconfig.json b/packages/sol-profiler/typedoc-tsconfig.json
new file mode 100644
index 000000000..a4c669cb6
--- /dev/null
+++ b/packages/sol-profiler/typedoc-tsconfig.json
@@ -0,0 +1,7 @@
+{
+    "extends": "../../typedoc-tsconfig",
+    "compilerOptions": {
+        "outDir": "lib"
+    },
+    "include": ["./src/**/*"]
+}