1 files changed, 11 insertions, 6 deletions
diff --git a/packages/sol-compiler/src/compiler.ts b/packages/sol-compiler/src/compiler.ts
index 2ebc5228e..1d5bdb940 100644
--- a/packages/sol-compiler/src/compiler.ts
+++ b/packages/sol-compiler/src/compiler.ts
@@ -1,3 +1,4 @@
+import { assert } from '@0xproject/assert';
 import {
     ContractSource,
     ContractSources,
@@ -22,6 +23,7 @@ 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 {
     createDirIfDoesNotExistAsync,
@@ -80,16 +82,19 @@ export class Compiler {
      * Instantiates a new instance of the Compiler class.
      * @return An instance of the Compiler class.
      */
-    constructor(opts: CompilerOptions) {
+    constructor(opts?: CompilerOptions) {
+        assert.doesConformToSchema('opts', opts, compilerOptionsSchema);
         // TODO: Look for config file in parent directories if not found in current directory
         const config: CompilerOptions = fs.existsSync(CONFIG_FILE)
             ? JSON.parse(fs.readFileSync(CONFIG_FILE).toString())
             : {};
-        this._contractsDir = opts.contractsDir || config.contractsDir || DEFAULT_CONTRACTS_DIR;
-        this._solcVersionIfExists = opts.solcVersion || config.solcVersion;
-        this._compilerSettings = opts.compilerSettings || config.compilerSettings || DEFAULT_COMPILER_SETTINGS;
-        this._artifactsDir = opts.artifactsDir || config.artifactsDir || DEFAULT_ARTIFACTS_DIR;
-        this._specifiedContracts = opts.contracts || config.contracts || ALL_CONTRACTS_IDENTIFIER;
+        const passedOpts = opts || {};
+        assert.doesConformToSchema('compiler.json', config, compilerOptionsSchema);
+        this._contractsDir = passedOpts.contractsDir || config.contractsDir || DEFAULT_CONTRACTS_DIR;
+        this._solcVersionIfExists = passedOpts.solcVersion || config.solcVersion;
+        this._compilerSettings = passedOpts.compilerSettings || config.compilerSettings || DEFAULT_COMPILER_SETTINGS;
+        this._artifactsDir = passedOpts.artifactsDir || config.artifactsDir || DEFAULT_ARTIFACTS_DIR;
+        this._specifiedContracts = passedOpts.contracts || config.contracts || ALL_CONTRACTS_IDENTIFIER;
         this._nameResolver = new NameResolver(path.resolve(this._contractsDir));
         const resolver = new FallthroughResolver();
         resolver.appendResolver(new URLResolver());