aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorLeonid Logvinov <logvinov.leon@gmail.com>2018-12-15 04:55:50 +0800
committerLeonid Logvinov <logvinov.leon@gmail.com>2018-12-19 22:41:48 +0800
commitc5632490f25efd409472ca4727ee22b5bf0c763a (patch)
tree3abe13758c11d75fdf11c232118f0130920176f6
parent89ea7b2a2d4e3af995ee08988b64a617e7b89aee (diff)
downloaddexon-sol-tools-c5632490f25efd409472ca4727ee22b5bf0c763a.tar
dexon-sol-tools-c5632490f25efd409472ca4727ee22b5bf0c763a.tar.gz
dexon-sol-tools-c5632490f25efd409472ca4727ee22b5bf0c763a.tar.bz2
dexon-sol-tools-c5632490f25efd409472ca4727ee22b5bf0c763a.tar.lz
dexon-sol-tools-c5632490f25efd409472ca4727ee22b5bf0c763a.tar.xz
dexon-sol-tools-c5632490f25efd409472ca4727ee22b5bf0c763a.tar.zst
dexon-sol-tools-c5632490f25efd409472ca4727ee22b5bf0c763a.zip
Refactor most of the sol-compiler methods into helper functions in utils and make resolver pluggable into them
-rw-r--r--packages/sol-compiler/src/compiler.ts205
-rw-r--r--packages/sol-compiler/src/utils/compiler.ts216
-rw-r--r--packages/sol-compiler/src/utils/constants.ts3
3 files changed, 237 insertions, 187 deletions
diff --git a/packages/sol-compiler/src/compiler.ts b/packages/sol-compiler/src/compiler.ts
index 85df8209e..45cbf527b 100644
--- a/packages/sol-compiler/src/compiler.ts
+++ b/packages/sol-compiler/src/compiler.ts
@@ -8,24 +8,24 @@ import {
Resolver,
URLResolver,
} from '@0x/sol-resolver';
-import { fetchAsync, logUtils } from '@0x/utils';
-import chalk from 'chalk';
+import { logUtils } from '@0x/utils';
import { CompilerOptions, ContractArtifact, ContractVersionData, StandardOutput } from 'ethereum-types';
-import * as ethUtil from 'ethereumjs-util';
import * as fs from 'fs';
import * as _ from 'lodash';
import * as path from 'path';
-import * as requireFromString from 'require-from-string';
import * as semver from 'semver';
import solc = require('solc');
import { compilerOptionsSchema } from './schemas/compiler_options_schema';
import { binPaths } from './solc/bin_paths';
import {
+ addHexPrefixToContractBytecode,
+ compile,
createDirIfDoesNotExistAsync,
getContractArtifactIfExistsAsync,
- getNormalizedErrMsg,
- parseDependencies,
+ getSolcAsync,
+ getSourcesWithDependencies,
+ getSourceTreeHash,
parseSolidityVersionRange,
} from './utils/compiler';
import { constants } from './utils/constants';
@@ -35,7 +35,6 @@ import { utils } from './utils/utils';
type TYPE_ALL_FILES_IDENTIFIER = '*';
const ALL_CONTRACTS_IDENTIFIER = '*';
const ALL_FILES_IDENTIFIER = '*';
-const SOLC_BIN_DIR = path.join(__dirname, '..', '..', 'solc_bin');
const DEFAULT_CONTRACTS_DIR = path.resolve('contracts');
const DEFAULT_ARTIFACTS_DIR = path.resolve('artifacts');
// Solc compiler settings cannot be configured from the commandline.
@@ -82,49 +81,6 @@ export class Compiler {
private readonly _artifactsDir: string;
private readonly _solcVersionIfExists: string | undefined;
private readonly _specifiedContracts: string[] | TYPE_ALL_FILES_IDENTIFIER;
- private static async _getSolcAsync(
- solcVersion: string,
- ): Promise<{ solcInstance: solc.SolcInstance; fullSolcVersion: string }> {
- const fullSolcVersion = binPaths[solcVersion];
- if (_.isUndefined(fullSolcVersion)) {
- throw new Error(`${solcVersion} is not a known compiler version`);
- }
- const compilerBinFilename = path.join(SOLC_BIN_DIR, fullSolcVersion);
- let solcjs: string;
- if (await fsWrapper.doesFileExistAsync(compilerBinFilename)) {
- solcjs = (await fsWrapper.readFileAsync(compilerBinFilename)).toString();
- } else {
- logUtils.warn(`Downloading ${fullSolcVersion}...`);
- const url = `${constants.BASE_COMPILER_URL}${fullSolcVersion}`;
- const response = await fetchAsync(url);
- const SUCCESS_STATUS = 200;
- if (response.status !== SUCCESS_STATUS) {
- throw new Error(`Failed to load ${fullSolcVersion}`);
- }
- solcjs = await response.text();
- await fsWrapper.writeFileAsync(compilerBinFilename, solcjs);
- }
- if (solcjs.length === 0) {
- throw new Error('No compiler available');
- }
- const solcInstance = solc.setupMethods(requireFromString(solcjs, compilerBinFilename));
- return { solcInstance, fullSolcVersion };
- }
- private static _addHexPrefixToContractBytecode(compiledContract: solc.StandardContractOutput): void {
- if (!_.isUndefined(compiledContract.evm)) {
- if (!_.isUndefined(compiledContract.evm.bytecode) && !_.isUndefined(compiledContract.evm.bytecode.object)) {
- compiledContract.evm.bytecode.object = ethUtil.addHexPrefix(compiledContract.evm.bytecode.object);
- }
- if (
- !_.isUndefined(compiledContract.evm.deployedBytecode) &&
- !_.isUndefined(compiledContract.evm.deployedBytecode.object)
- ) {
- compiledContract.evm.deployedBytecode.object = ethUtil.addHexPrefix(
- compiledContract.evm.deployedBytecode.object,
- );
- }
- }
- }
/**
* Instantiates a new instance of the Compiler class.
* @param opts Optional compiler options
@@ -158,7 +114,7 @@ export class Compiler {
*/
public async compileAsync(): Promise<void> {
await createDirIfDoesNotExistAsync(this._artifactsDir);
- await createDirIfDoesNotExistAsync(SOLC_BIN_DIR);
+ await createDirIfDoesNotExistAsync(constants.SOLC_BIN_DIR);
await this._compileContractsAsync(this._getContractNamesToCompile(), true);
}
/**
@@ -201,12 +157,14 @@ export class Compiler {
for (const contractName of contractNames) {
const contractSource = this._resolver.resolve(contractName);
+ const sourceTreeHashHex = getSourceTreeHash(
+ this._resolver,
+ path.join(this._contractsDir, contractSource.path),
+ ).toString('hex');
const contractData = {
contractName,
currentArtifactIfExists: await getContractArtifactIfExistsAsync(this._artifactsDir, contractName),
- sourceTreeHashHex: `0x${this._getSourceTreeHash(
- path.join(this._contractsDir, contractSource.path),
- ).toString('hex')}`,
+ sourceTreeHashHex: `0x${sourceTreeHashHex}`,
};
if (!this._shouldCompile(contractData)) {
continue;
@@ -244,9 +202,8 @@ export class Compiler {
}) with Solidity v${solcVersion}...`,
);
- const { solcInstance, fullSolcVersion } = await Compiler._getSolcAsync(solcVersion);
-
- const compilerOutput = this._compile(solcInstance, input.standardInput);
+ const { solcInstance, fullSolcVersion } = await getSolcAsync(solcVersion);
+ const compilerOutput = compile(this._resolver, solcInstance, input.standardInput);
compilerOutputs.push(compilerOutput);
for (const contractPath of input.contractsToCompile) {
@@ -259,7 +216,7 @@ export class Compiler {
);
}
- Compiler._addHexPrefixToContractBytecode(compiledContract);
+ addHexPrefixToContractBytecode(compiledContract);
if (shouldPersist) {
await this._persistCompiledContractAsync(
@@ -301,7 +258,11 @@ export class Compiler {
// contains listings for for every contract compiled during the compiler invocation that compiled the contract
// to be persisted, which could include many that are irrelevant to the contract at hand. So, gather up only
// the relevant sources:
- const { sourceCodes, sources } = this._getSourcesWithDependencies(contractPath, compilerOutput.sources);
+ const { sourceCodes, sources } = getSourcesWithDependencies(
+ this._resolver,
+ contractPath,
+ compilerOutput.sources,
+ );
const contractVersion: ContractVersionData = {
compilerOutput: compiledContract,
@@ -336,130 +297,4 @@ export class Compiler {
await fsWrapper.writeFileAsync(currentArtifactPath, artifactString);
logUtils.warn(`${contractName} artifact saved!`);
}
- /**
- * For the given @param contractPath, populates JSON objects to be used in the ContractVersionData interface's
- * properties `sources` (source code file names mapped to ID numbers) and `sourceCodes` (source code content of
- * contracts) for that contract. The source code pointed to by contractPath is read and parsed directly (via
- * `this._resolver.resolve().source`), as are its imports, recursively. The ID numbers for @return `sources` are
- * taken from the corresponding ID's in @param fullSources, and the content for @return sourceCodes is read from
- * disk (via the aforementioned `resolver.source`).
- */
- private _getSourcesWithDependencies(
- contractPath: string,
- fullSources: { [sourceName: string]: { id: number } },
- ): { sourceCodes: { [sourceName: string]: string }; sources: { [sourceName: string]: { id: number } } } {
- const sources = { [contractPath]: { id: fullSources[contractPath].id } };
- const sourceCodes = { [contractPath]: this._resolver.resolve(contractPath).source };
- this._recursivelyGatherDependencySources(
- contractPath,
- sourceCodes[contractPath],
- fullSources,
- sources,
- sourceCodes,
- );
- return { sourceCodes, sources };
- }
- private _recursivelyGatherDependencySources(
- contractPath: string,
- contractSource: string,
- fullSources: { [sourceName: string]: { id: number } },
- sourcesToAppendTo: { [sourceName: string]: { id: number } },
- sourceCodesToAppendTo: { [sourceName: string]: string },
- ): void {
- const importStatementMatches = contractSource.match(/\nimport[^;]*;/g);
- if (importStatementMatches === null) {
- return;
- }
- for (const importStatementMatch of importStatementMatches) {
- const importPathMatches = importStatementMatch.match(/\"([^\"]*)\"/);
- if (importPathMatches === null || importPathMatches.length === 0) {
- continue;
- }
-
- let importPath = importPathMatches[1];
- // HACK(ablrow): We have, e.g.:
- //
- // importPath = "../../utils/LibBytes/LibBytes.sol"
- // contractPath = "2.0.0/protocol/AssetProxyOwner/AssetProxyOwner.sol"
- //
- // Resolver doesn't understand "../" so we want to pass
- // "2.0.0/utils/LibBytes/LibBytes.sol" to resolver.
- //
- // This hack involves using path.resolve. But path.resolve returns
- // absolute directories by default. We trick it into thinking that
- // contractPath is a root directory by prepending a '/' and then
- // removing the '/' the end.
- //
- // path.resolve("/a/b/c", ""../../d/e") === "/a/d/e"
- //
- const lastPathSeparatorPos = contractPath.lastIndexOf('/');
- const contractFolder = lastPathSeparatorPos === -1 ? '' : contractPath.slice(0, lastPathSeparatorPos + 1);
- if (importPath.startsWith('.')) {
- /**
- * Some imports path are relative ("../Token.sol", "./Wallet.sol")
- * while others are absolute ("Token.sol", "@0x/contracts/Wallet.sol")
- * And we need to append the base path for relative imports.
- */
- importPath = path.resolve(`/${contractFolder}`, importPath).replace('/', '');
- }
-
- if (_.isUndefined(sourcesToAppendTo[importPath])) {
- sourcesToAppendTo[importPath] = { id: fullSources[importPath].id };
- sourceCodesToAppendTo[importPath] = this._resolver.resolve(importPath).source;
-
- this._recursivelyGatherDependencySources(
- importPath,
- this._resolver.resolve(importPath).source,
- fullSources,
- sourcesToAppendTo,
- sourceCodesToAppendTo,
- );
- }
- }
- }
- private _compile(solcInstance: solc.SolcInstance, standardInput: solc.StandardInput): solc.StandardOutput {
- const compiled: solc.StandardOutput = JSON.parse(
- solcInstance.compileStandardWrapper(JSON.stringify(standardInput), importPath => {
- const sourceCodeIfExists = this._resolver.resolve(importPath);
- return { contents: sourceCodeIfExists.source };
- }),
- );
- if (!_.isUndefined(compiled.errors)) {
- const SOLIDITY_WARNING = 'warning';
- const errors = _.filter(compiled.errors, entry => entry.severity !== SOLIDITY_WARNING);
- const warnings = _.filter(compiled.errors, entry => entry.severity === SOLIDITY_WARNING);
- if (!_.isEmpty(errors)) {
- errors.forEach(error => {
- const normalizedErrMsg = getNormalizedErrMsg(error.formattedMessage || error.message);
- logUtils.warn(chalk.red(normalizedErrMsg));
- });
- throw new Error('Compilation errors encountered');
- } else {
- warnings.forEach(warning => {
- const normalizedWarningMsg = getNormalizedErrMsg(warning.formattedMessage || warning.message);
- logUtils.warn(chalk.yellow(normalizedWarningMsg));
- });
- }
- }
- return compiled;
- }
- /**
- * Gets the source tree hash for a file and its dependencies.
- * @param fileName Name of contract file.
- */
- private _getSourceTreeHash(importPath: string): Buffer {
- const contractSource = this._resolver.resolve(importPath);
- const dependencies = parseDependencies(contractSource);
- const sourceHash = ethUtil.sha3(contractSource.source);
- if (dependencies.length === 0) {
- return sourceHash;
- } else {
- const dependencySourceTreeHashes = _.map(dependencies, (dependency: string) =>
- this._getSourceTreeHash(dependency),
- );
- const sourceTreeHashesBuffer = Buffer.concat([sourceHash, ...dependencySourceTreeHashes]);
- const sourceTreeHash = ethUtil.sha3(sourceTreeHashesBuffer);
- return sourceTreeHash;
- }
- }
}
diff --git a/packages/sol-compiler/src/utils/compiler.ts b/packages/sol-compiler/src/utils/compiler.ts
index cda67a414..034f72f8d 100644
--- a/packages/sol-compiler/src/utils/compiler.ts
+++ b/packages/sol-compiler/src/utils/compiler.ts
@@ -1,9 +1,16 @@
-import { ContractSource } from '@0x/sol-resolver';
-import { logUtils } from '@0x/utils';
+import { ContractSource, Resolver } from '@0x/sol-resolver';
+import { fetchAsync, logUtils } from '@0x/utils';
+import chalk from 'chalk';
import { ContractArtifact } from 'ethereum-types';
+import * as ethUtil from 'ethereumjs-util';
import * as _ from 'lodash';
import * as path from 'path';
+import * as requireFromString from 'require-from-string';
+import * as solc from 'solc';
+import { binPaths } from '../solc/bin_paths';
+
+import { constants } from './constants';
import { fsWrapper } from './fs_wrapper';
/**
@@ -106,3 +113,208 @@ export function parseDependencies(contractSource: ContractSource): string[] {
});
return dependencies;
}
+
+/**
+ * Compiles the contracts and prints errors/warnings
+ * @param resolver Resolver
+ * @param solcInstance Instance of a solc compiler
+ * @param standardInput Solidity standard JSON input
+ */
+export function compile(
+ resolver: Resolver,
+ solcInstance: solc.SolcInstance,
+ standardInput: solc.StandardInput,
+): solc.StandardOutput {
+ const standardInputStr = JSON.stringify(standardInput);
+ const standardOutputStr = solcInstance.compileStandardWrapper(standardInputStr, importPath => {
+ const sourceCodeIfExists = resolver.resolve(importPath);
+ return { contents: sourceCodeIfExists.source };
+ });
+ const compiled: solc.StandardOutput = JSON.parse(standardOutputStr);
+ if (!_.isUndefined(compiled.errors)) {
+ printCompilationErrorsAndWarnings(compiled.errors);
+ }
+ return compiled;
+}
+/**
+ * Separates errors from warnings, formats the messages and prints them. Throws if there is any compilation error (not warning).
+ * @param solcErrors The errors field of standard JSON output that contains errors and warnings.
+ */
+function printCompilationErrorsAndWarnings(solcErrors: solc.SolcError[]): void {
+ const SOLIDITY_WARNING = 'warning';
+ const errors = _.filter(solcErrors, entry => entry.severity !== SOLIDITY_WARNING);
+ const warnings = _.filter(solcErrors, entry => entry.severity === SOLIDITY_WARNING);
+ if (!_.isEmpty(errors)) {
+ errors.forEach(error => {
+ const normalizedErrMsg = getNormalizedErrMsg(error.formattedMessage || error.message);
+ logUtils.warn(chalk.red(normalizedErrMsg));
+ });
+ throw new Error('Compilation errors encountered');
+ } else {
+ warnings.forEach(warning => {
+ const normalizedWarningMsg = getNormalizedErrMsg(warning.formattedMessage || warning.message);
+ logUtils.warn(chalk.yellow(normalizedWarningMsg));
+ });
+ }
+}
+
+/**
+ * Gets the source tree hash for a file and its dependencies.
+ * @param fileName Name of contract file.
+ */
+export function getSourceTreeHash(resolver: Resolver, importPath: string): Buffer {
+ const contractSource = resolver.resolve(importPath);
+ const dependencies = parseDependencies(contractSource);
+ const sourceHash = ethUtil.sha3(contractSource.source);
+ if (dependencies.length === 0) {
+ return sourceHash;
+ } else {
+ const dependencySourceTreeHashes = _.map(dependencies, (dependency: string) =>
+ getSourceTreeHash(resolver, dependency),
+ );
+ const sourceTreeHashesBuffer = Buffer.concat([sourceHash, ...dependencySourceTreeHashes]);
+ const sourceTreeHash = ethUtil.sha3(sourceTreeHashesBuffer);
+ return sourceTreeHash;
+ }
+}
+
+/**
+ * For the given @param contractPath, populates JSON objects to be used in the ContractVersionData interface's
+ * properties `sources` (source code file names mapped to ID numbers) and `sourceCodes` (source code content of
+ * contracts) for that contract. The source code pointed to by contractPath is read and parsed directly (via
+ * `resolver.resolve().source`), as are its imports, recursively. The ID numbers for @return `sources` are
+ * taken from the corresponding ID's in @param fullSources, and the content for @return sourceCodes is read from
+ * disk (via the aforementioned `resolver.source`).
+ */
+export function getSourcesWithDependencies(
+ resolver: Resolver,
+ contractPath: string,
+ fullSources: { [sourceName: string]: { id: number } },
+): { sourceCodes: { [sourceName: string]: string }; sources: { [sourceName: string]: { id: number } } } {
+ const sources = { [contractPath]: { id: fullSources[contractPath].id } };
+ const sourceCodes = { [contractPath]: resolver.resolve(contractPath).source };
+ recursivelyGatherDependencySources(
+ resolver,
+ contractPath,
+ sourceCodes[contractPath],
+ fullSources,
+ sources,
+ sourceCodes,
+ );
+ return { sourceCodes, sources };
+}
+
+function recursivelyGatherDependencySources(
+ resolver: Resolver,
+ contractPath: string,
+ contractSource: string,
+ fullSources: { [sourceName: string]: { id: number } },
+ sourcesToAppendTo: { [sourceName: string]: { id: number } },
+ sourceCodesToAppendTo: { [sourceName: string]: string },
+): void {
+ const importStatementMatches = contractSource.match(/\nimport[^;]*;/g);
+ if (importStatementMatches === null) {
+ return;
+ }
+ for (const importStatementMatch of importStatementMatches) {
+ const importPathMatches = importStatementMatch.match(/\"([^\"]*)\"/);
+ if (importPathMatches === null || importPathMatches.length === 0) {
+ continue;
+ }
+
+ let importPath = importPathMatches[1];
+ // HACK(ablrow): We have, e.g.:
+ //
+ // importPath = "../../utils/LibBytes/LibBytes.sol"
+ // contractPath = "2.0.0/protocol/AssetProxyOwner/AssetProxyOwner.sol"
+ //
+ // Resolver doesn't understand "../" so we want to pass
+ // "2.0.0/utils/LibBytes/LibBytes.sol" to resolver.
+ //
+ // This hack involves using path.resolve. But path.resolve returns
+ // absolute directories by default. We trick it into thinking that
+ // contractPath is a root directory by prepending a '/' and then
+ // removing the '/' the end.
+ //
+ // path.resolve("/a/b/c", ""../../d/e") === "/a/d/e"
+ //
+ const lastPathSeparatorPos = contractPath.lastIndexOf('/');
+ const contractFolder = lastPathSeparatorPos === -1 ? '' : contractPath.slice(0, lastPathSeparatorPos + 1);
+ if (importPath.startsWith('.')) {
+ /**
+ * Some imports path are relative ("../Token.sol", "./Wallet.sol")
+ * while others are absolute ("Token.sol", "@0x/contracts/Wallet.sol")
+ * And we need to append the base path for relative imports.
+ */
+ importPath = path.resolve(`/${contractFolder}`, importPath).replace('/', '');
+ }
+
+ if (_.isUndefined(sourcesToAppendTo[importPath])) {
+ sourcesToAppendTo[importPath] = { id: fullSources[importPath].id };
+ sourceCodesToAppendTo[importPath] = resolver.resolve(importPath).source;
+
+ recursivelyGatherDependencySources(
+ resolver,
+ importPath,
+ resolver.resolve(importPath).source,
+ fullSources,
+ sourcesToAppendTo,
+ sourceCodesToAppendTo,
+ );
+ }
+ }
+}
+
+/**
+ * Gets the solidity compiler instance and full version name. If the compiler is already cached - gets it from FS,
+ * otherwise - fetches it and caches it.
+ * @param solcVersion The compiler version. e.g. 0.5.0
+ */
+export async function getSolcAsync(
+ solcVersion: string,
+): Promise<{ solcInstance: solc.SolcInstance; fullSolcVersion: string }> {
+ const fullSolcVersion = binPaths[solcVersion];
+ if (_.isUndefined(fullSolcVersion)) {
+ throw new Error(`${solcVersion} is not a known compiler version`);
+ }
+ const compilerBinFilename = path.join(constants.SOLC_BIN_DIR, fullSolcVersion);
+ let solcjs: string;
+ if (await fsWrapper.doesFileExistAsync(compilerBinFilename)) {
+ solcjs = (await fsWrapper.readFileAsync(compilerBinFilename)).toString();
+ } else {
+ logUtils.warn(`Downloading ${fullSolcVersion}...`);
+ const url = `${constants.BASE_COMPILER_URL}${fullSolcVersion}`;
+ const response = await fetchAsync(url);
+ const SUCCESS_STATUS = 200;
+ if (response.status !== SUCCESS_STATUS) {
+ throw new Error(`Failed to load ${fullSolcVersion}`);
+ }
+ solcjs = await response.text();
+ await fsWrapper.writeFileAsync(compilerBinFilename, solcjs);
+ }
+ if (solcjs.length === 0) {
+ throw new Error('No compiler available');
+ }
+ const solcInstance = solc.setupMethods(requireFromString(solcjs, compilerBinFilename));
+ return { solcInstance, fullSolcVersion };
+}
+
+/**
+ * Solidity compiler emits the bytecode without a 0x prefix for a hex. This function fixes it if bytecode is present.
+ * @param compiledContract The standard JSON output section for a contract. Geth modified in place.
+ */
+export function addHexPrefixToContractBytecode(compiledContract: solc.StandardContractOutput): void {
+ if (!_.isUndefined(compiledContract.evm)) {
+ if (!_.isUndefined(compiledContract.evm.bytecode) && !_.isUndefined(compiledContract.evm.bytecode.object)) {
+ compiledContract.evm.bytecode.object = ethUtil.addHexPrefix(compiledContract.evm.bytecode.object);
+ }
+ if (
+ !_.isUndefined(compiledContract.evm.deployedBytecode) &&
+ !_.isUndefined(compiledContract.evm.deployedBytecode.object)
+ ) {
+ compiledContract.evm.deployedBytecode.object = ethUtil.addHexPrefix(
+ compiledContract.evm.deployedBytecode.object,
+ );
+ }
+ }
+}
diff --git a/packages/sol-compiler/src/utils/constants.ts b/packages/sol-compiler/src/utils/constants.ts
index df2ddb3b2..433897f8a 100644
--- a/packages/sol-compiler/src/utils/constants.ts
+++ b/packages/sol-compiler/src/utils/constants.ts
@@ -1,5 +1,8 @@
+import * as path from 'path';
+
export const constants = {
SOLIDITY_FILE_EXTENSION: '.sol',
BASE_COMPILER_URL: 'https://ethereum.github.io/solc-bin/bin/',
LATEST_ARTIFACT_VERSION: '2.0.0',
+ SOLC_BIN_DIR: path.join(__dirname, '..', '..', 'solc_bin'),
};