10 files changed, 360 insertions, 0 deletions
diff --git a/packages/sol-trace/.npmignore b/packages/sol-trace/.npmignore
new file mode 100644
index 000000000..037786e46
--- /dev/null
+++ b/packages/sol-trace/.npmignore
@@ -0,0 +1,6 @@
+.*
+yarn-error.log
+/src/
+/scripts/
+tsconfig.json
+/lib/src/monorepo_scripts/
diff --git a/packages/sol-trace/CHANGELOG.json b/packages/sol-trace/CHANGELOG.json
new file mode 100644
index 000000000..223400eae
--- /dev/null
+++ b/packages/sol-trace/CHANGELOG.json
@@ -0,0 +1,11 @@
+[
+    {
+        "version": "1.0.0",
+        "changes": [
+            {
+                "note": "Initial release as a separate package. For historical entries see @0x/sol-tracing-utils",
+                "pr": 1492
+            }
+        ]
+    }
+]
diff --git a/packages/sol-trace/README.md b/packages/sol-trace/README.md
new file mode 100644
index 000000000..86ca2cbd6
--- /dev/null
+++ b/packages/sol-trace/README.md
@@ -0,0 +1,75 @@
+## @0x/sol-trace
+
+Prints a stack trace when a revert is encountered.
+
+### Read the [Documentation](https://0xproject.com/docs/sol-trace).
+
+## Installation
+
+```bash
+yarn add @0x/sol-trace
+```
+
+**Import**
+
+```javascript
+import { RevertTraceSubprovider } from '@0x/sol-trace';
+```
+
+or
+
+```javascript
+var RevertTraceSubprovider = require('@0x/sol-trace').RevertTraceSubprovider;
+```
+
+## 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-trace yarn build
+```
+
+Or continuously rebuild on change:
+
+```bash
+PKG=@0x/sol-trace yarn watch
+```
+
+### Clean
+
+```bash
+yarn clean
+```
+
+### Lint
+
+```bash
+yarn lint
+```
+
+### Run Tests
+
+```bash
+yarn test
+```
diff --git a/packages/sol-trace/package.json b/packages/sol-trace/package.json
new file mode 100644
index 000000000..3013be6f9
--- /dev/null
+++ b/packages/sol-trace/package.json
@@ -0,0 +1,52 @@
+{
+    "name": "@0x/sol-trace",
+    "version": "1.0.0",
+    "engines": {
+        "node": ">=6.12"
+    },
+    "description": "Prints stack trace on Solidity revert",
+    "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-trace/README.md",
+    "dependencies": {
+        "@0x/subproviders": "^2.1.8",
+        "@0x/typescript-typings": "^3.0.6",
+        "@0x/sol-tracing-utils": "^2.1.16",
+        "ethereum-types": "^1.1.4",
+        "ethereumjs-util": "^5.1.1",
+        "lodash": "^4.17.5",
+        "loglevel": "^1.6.1"
+    },
+    "devDependencies": {
+        "@0x/tslint-config": "^2.0.0",
+        "@types/loglevel": "^1.5.3",
+        "@types/node": "*",
+        "npm-run-all": "^4.1.2",
+        "shx": "^0.2.2",
+        "tslint": "5.11.0",
+        "typescript": "3.0.1"
+    },
+    "publishConfig": {
+        "access": "public"
+    }
+}
diff --git a/packages/sol-trace/src/globals.d.ts b/packages/sol-trace/src/globals.d.ts
new file mode 100644
index 000000000..e799b3529
--- /dev/null
+++ b/packages/sol-trace/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-trace/src/index.ts b/packages/sol-trace/src/index.ts
new file mode 100644
index 000000000..120c0d0a9
--- /dev/null
+++ b/packages/sol-trace/src/index.ts
@@ -0,0 +1,24 @@
+export {
+    AbstractArtifactAdapter,
+    TruffleArtifactAdapter,
+    SolCompilerArtifactAdapter,
+    ContractData,
+} from '@0x/sol-tracing-utils';
+
+export { RevertTraceSubprovider } from './revert_trace_subprovider';
+
+export {
+    JSONRPCRequestPayload,
+    Provider,
+    JSONRPCErrorCallback,
+    JSONRPCResponsePayload,
+    JSONRPCResponseError,
+} from 'ethereum-types';
+
+export {
+    JSONRPCRequestPayloadWithMethod,
+    NextCallback,
+    ErrorCallback,
+    OnNextCompleted,
+    Callback,
+} from '@0x/subproviders';
diff --git a/packages/sol-trace/src/revert_trace_subprovider.ts b/packages/sol-trace/src/revert_trace_subprovider.ts
new file mode 100644
index 000000000..31067a402
--- /dev/null
+++ b/packages/sol-trace/src/revert_trace_subprovider.ts
@@ -0,0 +1,167 @@
+import {
+    AbstractArtifactAdapter,
+    constants,
+    ContractData,
+    EvmCallStack,
+    getRevertTrace,
+    getSourceRangeSnippet,
+    parseSourceMap,
+    SourceRange,
+    SourceSnippet,
+    TraceCollectionSubprovider,
+    utils,
+} from '@0x/sol-tracing-utils';
+import { stripHexPrefix } from 'ethereumjs-util';
+import * as _ from 'lodash';
+import { getLogger, levels, Logger } from 'loglevel';
+
+/**
+ * This class implements the [web3-provider-engine](https://github.com/MetaMask/provider-engine) subprovider interface.
+ * It is used to report call stack traces whenever a revert occurs.
+ */
+export class RevertTraceSubprovider extends TraceCollectionSubprovider {
+    // Lock is used to not accept normal transactions while doing call/snapshot magic because they'll be reverted later otherwise
+    private _contractsData!: ContractData[];
+    private readonly _artifactAdapter: AbstractArtifactAdapter;
+    private readonly _logger: Logger;
+
+    /**
+     * Instantiates a RevertTraceSubprovider 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: true,
+            shouldCollectCallTraces: true,
+        };
+        super(defaultFromAddress, traceCollectionSubproviderConfig);
+        this._artifactAdapter = artifactAdapter;
+        this._logger = getLogger('sol-trace');
+        this._logger.setLevel(isVerbose ? levels.TRACE : levels.ERROR);
+    }
+    // tslint:disable-next-line:no-unused-variable
+    protected async _recordTxTraceAsync(address: string, data: string | undefined, txHash: string): Promise<void> {
+        await this._web3Wrapper.awaitTransactionMinedAsync(txHash, 0);
+        const trace = await this._web3Wrapper.getTransactionTraceAsync(txHash, {
+            disableMemory: true,
+            disableStack: false,
+            disableStorage: true,
+        });
+        const evmCallStack = getRevertTrace(trace.structLogs, address);
+        if (evmCallStack.length > 0) {
+            // if getRevertTrace returns a call stack it means there was a
+            // revert.
+            await this._printStackTraceAsync(evmCallStack);
+        }
+    }
+    private async _printStackTraceAsync(evmCallStack: EvmCallStack): Promise<void> {
+        const sourceSnippets: SourceSnippet[] = [];
+        if (_.isUndefined(this._contractsData)) {
+            this._contractsData = await this._artifactAdapter.collectContractsDataAsync();
+        }
+        for (const evmCallStackEntry of evmCallStack) {
+            const isContractCreation = evmCallStackEntry.address === constants.NEW_CONTRACT;
+            if (isContractCreation) {
+                this._logger.error('Contract creation not supported');
+                continue;
+            }
+            const bytecode = await this._web3Wrapper.getContractCodeAsync(evmCallStackEntry.address);
+            const contractData = utils.getContractDataIfExists(this._contractsData, bytecode);
+            if (_.isUndefined(contractData)) {
+                const errMsg = isContractCreation
+                    ? `Unknown contract creation transaction`
+                    : `Transaction to an unknown address: ${evmCallStackEntry.address}`;
+                this._logger.warn(errMsg);
+                continue;
+            }
+            const bytecodeHex = stripHexPrefix(bytecode);
+            const sourceMap = isContractCreation ? contractData.sourceMap : contractData.sourceMapRuntime;
+
+            const pcToSourceRange = parseSourceMap(
+                contractData.sourceCodes,
+                sourceMap,
+                bytecodeHex,
+                contractData.sources,
+            );
+            // tslint:disable-next-line:no-unnecessary-initializer
+            let sourceRange: SourceRange | undefined = undefined;
+            let pc = evmCallStackEntry.structLog.pc;
+            // Sometimes there is not a mapping for this pc (e.g. if the revert
+            // actually happens in assembly). In that case, we want to keep
+            // searching backwards by decrementing the pc until we find a
+            // mapped source range.
+            while (_.isUndefined(sourceRange) && pc > 0) {
+                sourceRange = pcToSourceRange[pc];
+                pc -= 1;
+            }
+            if (_.isUndefined(sourceRange)) {
+                this._logger.warn(
+                    `could not find matching sourceRange for structLog: ${JSON.stringify(
+                        _.omit(evmCallStackEntry.structLog, 'stack'),
+                    )}`,
+                );
+                continue;
+            }
+
+            const fileIndex = contractData.sources.indexOf(sourceRange.fileName);
+            const sourceSnippet = getSourceRangeSnippet(sourceRange, contractData.sourceCodes[fileIndex]);
+            if (sourceSnippet !== null) {
+                sourceSnippets.push(sourceSnippet);
+            }
+        }
+        const filteredSnippets = filterSnippets(sourceSnippets);
+        if (filteredSnippets.length > 0) {
+            this._logger.error('\n\nStack trace for REVERT:\n');
+            _.forEach(_.reverse(filteredSnippets), snippet => {
+                const traceString = getStackTraceString(snippet);
+                this._logger.error(traceString);
+            });
+            this._logger.error('\n');
+        } else {
+            this._logger.error('REVERT detected but could not determine stack trace');
+        }
+    }
+}
+
+// removes duplicates and if statements
+function filterSnippets(sourceSnippets: SourceSnippet[]): SourceSnippet[] {
+    if (sourceSnippets.length === 0) {
+        return [];
+    }
+    const results: SourceSnippet[] = [sourceSnippets[0]];
+    let prev = sourceSnippets[0];
+    for (const sourceSnippet of sourceSnippets) {
+        if (sourceSnippet.type === 'IfStatement') {
+            continue;
+        } else if (sourceSnippet.source === prev.source) {
+            prev = sourceSnippet;
+            continue;
+        }
+        results.push(sourceSnippet);
+        prev = sourceSnippet;
+    }
+    return results;
+}
+
+function getStackTraceString(sourceSnippet: SourceSnippet): string {
+    let result = `${sourceSnippet.fileName}:${sourceSnippet.range.start.line}:${sourceSnippet.range.start.column}`;
+    const snippetString = getSourceSnippetString(sourceSnippet);
+    if (snippetString !== '') {
+        result += `:\n        ${snippetString}`;
+    }
+    return result;
+}
+
+function getSourceSnippetString(sourceSnippet: SourceSnippet): string {
+    switch (sourceSnippet.type) {
+        case 'ContractDefinition':
+            return `contract ${sourceSnippet.name}`;
+        case 'FunctionDefinition':
+            return `function ${sourceSnippet.name}`;
+        default:
+            return `${sourceSnippet.source}`;
+    }
+}
diff --git a/packages/sol-trace/tsconfig.json b/packages/sol-trace/tsconfig.json
new file mode 100644
index 000000000..233008d61
--- /dev/null
+++ b/packages/sol-trace/tsconfig.json
@@ -0,0 +1,8 @@
+{
+    "extends": "../../tsconfig",
+    "compilerOptions": {
+        "outDir": "lib",
+        "rootDir": "."
+    },
+    "include": ["./src/**/*"]
+}
diff --git a/packages/sol-trace/tslint.json b/packages/sol-trace/tslint.json
new file mode 100644
index 000000000..dd9053357
--- /dev/null
+++ b/packages/sol-trace/tslint.json
@@ -0,0 +1,3 @@
+{
+    "extends": ["@0x/tslint-config"]
+}
diff --git a/packages/sol-trace/typedoc-tsconfig.json b/packages/sol-trace/typedoc-tsconfig.json
new file mode 100644
index 000000000..a4c669cb6
--- /dev/null
+++ b/packages/sol-trace/typedoc-tsconfig.json
@@ -0,0 +1,7 @@
+{
+    "extends": "../../typedoc-tsconfig",
+    "compilerOptions": {
+        "outDir": "lib"
+    },
+    "include": ["./src/**/*"]
+}