3 files changed, 18 insertions, 49 deletions
diff --git a/packages/sol-compiler/src/utils/compiler.ts b/packages/sol-compiler/src/utils/compiler.ts
index 968fcc5b2..c153beb0f 100644
--- a/packages/sol-compiler/src/utils/compiler.ts
+++ b/packages/sol-compiler/src/utils/compiler.ts
@@ -1,10 +1,10 @@
 import { ContractSource } from '@0xproject/sol-resolver';
 import { logUtils } from '@0xproject/utils';
+import { ContractArtifact } from 'ethereum-types';
 import * as _ from 'lodash';
 import * as path from 'path';
 
 import { fsWrapper } from './fs_wrapper';
-import { ContractArtifact } from './types';
 
 /**
  * Gets contract data on network or returns if an artifact does not exist.
@@ -26,7 +26,7 @@ export async function getContractArtifactIfExistsAsync(
         contractArtifact = JSON.parse(contractArtifactString);
         return contractArtifact;
     } catch (err) {
-        logUtils.log(`Artifact for ${contractName} does not exist`);
+        logUtils.warn(`Artifact for ${contractName} does not exist`);
         return undefined;
     }
 }
@@ -37,7 +37,7 @@ export async function getContractArtifactIfExistsAsync(
  */
 export async function createDirIfDoesNotExistAsync(dirPath: string): Promise<void> {
     if (!fsWrapper.doesPathExistSync(dirPath)) {
-        logUtils.log(`Creating directory at ${dirPath}...`);
+        logUtils.warn(`Creating directory at ${dirPath}...`);
         await fsWrapper.mkdirpAsync(dirPath);
     }
 }
diff --git a/packages/sol-compiler/src/utils/fs_wrapper.ts b/packages/sol-compiler/src/utils/fs_wrapper.ts
index cc7b06175..8d6800276 100644
--- a/packages/sol-compiler/src/utils/fs_wrapper.ts
+++ b/packages/sol-compiler/src/utils/fs_wrapper.ts
@@ -10,4 +10,19 @@ export const fsWrapper = {
     doesPathExistSync: fs.existsSync,
     rmdirSync: fs.rmdirSync,
     removeFileAsync: promisify<undefined>(fs.unlink),
+    statAsync: promisify<fs.Stats>(fs.stat),
+    appendFileAsync: promisify<undefined>(fs.appendFile),
+    accessAsync: promisify<boolean>(fs.access),
+    doesFileExistAsync: async (filePath: string): Promise<boolean> => {
+        try {
+            await fsWrapper.accessAsync(
+                filePath,
+                // node says we need to use bitwise, but tslint says no:
+                fs.constants.F_OK | fs.constants.R_OK, // tslint:disable-line:no-bitwise
+            );
+        } catch (err) {
+            return false;
+        }
+        return true;
+    },
 };
diff --git a/packages/sol-compiler/src/utils/types.ts b/packages/sol-compiler/src/utils/types.ts
index 4321a2235..b211cfcbc 100644
--- a/packages/sol-compiler/src/utils/types.ts
+++ b/packages/sol-compiler/src/utils/types.ts
@@ -1,5 +1,3 @@
-import * as solc from 'solc';
-
 export enum AbiType {
     Function = 'function',
     Constructor = 'constructor',
@@ -7,54 +5,10 @@ export enum AbiType {
     Fallback = 'fallback',
 }
 
-export interface ContractArtifact extends ContractVersionData {
-    schemaVersion: string;
-    contractName: string;
-    networks: ContractNetworks;
-}
-
-export interface ContractVersionData {
-    compiler: {
-        name: 'solc';
-        version: string;
-        settings: solc.CompilerSettings;
-    };
-    sources: {
-        [sourceName: string]: {
-            id: number;
-        };
-    };
-    sourceCodes: {
-        [sourceName: string]: string;
-    };
-    sourceTreeHashHex: string;
-    compilerOutput: solc.StandardContractOutput;
-}
-
-export interface ContractNetworks {
-    [networkId: number]: ContractNetworkData;
-}
-
-export interface ContractNetworkData {
-    address: string;
-    links: {
-        [linkName: string]: string;
-    };
-    constructorArgs: string;
-}
-
 export interface SolcErrors {
     [key: string]: boolean;
 }
 
-export interface CompilerOptions {
-    contractsDir?: string;
-    artifactsDir?: string;
-    compilerSettings?: solc.CompilerSettings;
-    contracts?: string[] | '*';
-    solcVersion?: string;
-}
-
 export interface ContractSourceData {
     [contractName: string]: ContractSpecificSourceData;
 }