Merge branch 'v2-prototype' into feature/website/wallet-flex-box

* v2-prototype: (95 commits)
  Add missing dep to website
  Upgrade solidity parser
  Fix trace test
  Fix linter issues
  Move contract utils
  Fix prettier
  Fix NameResolver
  Fix prettier
  Remove 0x.js as a dependency from website
  Enable 0x.js tests
  Fix small bug in order-utils
  Address feedback
  Fix Tslint error caused by "PromiseLike" value
  Fix Tslint error caused by "PromiseLike" value
  Update dogfood url
  fix contract-wrappers version
  Parse compiler.json in SolCompilerArtifactsAdapter
  Fix TokenTransferProxy artifact name since it's now suffixed with _v1
  Update yarn.lock
  Fix signature verification test
  ...

3 files changed, 13 insertions, 5 deletions

diff --git a/packages/sol-compiler/src/compiler.ts b/packages/sol-compiler/src/compiler.ts
index efb30091b..2ebc5228e 100644
--- a/packages/sol-compiler/src/compiler.ts
+++ b/packages/sol-compiler/src/compiler.ts
@@ -74,6 +74,7 @@ export class Compiler {
     private _contractsDir: string;
     private _compilerSettings: solc.CompilerSettings;
     private _artifactsDir: string;
+    private _solcVersionIfExists: string | undefined;
     private _specifiedContracts: string[] | TYPE_ALL_FILES_IDENTIFIER;
     /**
      * Instantiates a new instance of the Compiler class.
@@ -85,6 +86,7 @@ export class Compiler {
             ? 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;
@@ -139,9 +141,12 @@ export class Compiler {
         if (!shouldCompile) {
             return;
         }
-        const solcVersionRange = parseSolidityVersionRange(contractSource.source);
-        const availableCompilerVersions = _.keys(binPaths);
-        const solcVersion = semver.maxSatisfying(availableCompilerVersions, solcVersionRange);
+        let solcVersion = this._solcVersionIfExists;
+        if (_.isUndefined(solcVersion)) {
+            const solcVersionRange = parseSolidityVersionRange(contractSource.source);
+            const availableCompilerVersions = _.keys(binPaths);
+            solcVersion = semver.maxSatisfying(availableCompilerVersions, solcVersionRange);
+        }
         const fullSolcVersion = binPaths[solcVersion];
         const compilerBinFilename = path.join(SOLC_BIN_DIR, fullSolcVersion);
         let solcjs: string;
@@ -152,7 +157,8 @@ export class Compiler {
             logUtils.log(`Downloading ${fullSolcVersion}...`);
             const url = `${constants.BASE_COMPILER_URL}${fullSolcVersion}`;
             const response = await fetch(url);
-            if (response.status !== 200) {
+            const SUCCESS_STATUS = 200;
+            if (response.status !== SUCCESS_STATUS) {
                 throw new Error(`Failed to load ${fullSolcVersion}`);
             }
             solcjs = await response.text();
@@ -228,7 +234,7 @@ export class Compiler {
             sourceTreeHashHex,
             compiler: {
                 name: 'solc',
-                version: solcVersion,
+                version: fullSolcVersion,
                 settings: this._compilerSettings,
             },
         };
diff --git a/packages/sol-compiler/src/index.ts b/packages/sol-compiler/src/index.ts
index 4b4c51de2..15c166992 100644
--- a/packages/sol-compiler/src/index.ts
+++ b/packages/sol-compiler/src/index.ts
@@ -1,2 +1,3 @@
 export { Compiler } from './compiler';
+export { CompilerOptions } from './utils/types';
 export { ContractArtifact, ContractNetworks } from './utils/types';
diff --git a/packages/sol-compiler/src/utils/types.ts b/packages/sol-compiler/src/utils/types.ts
index b12a11b79..d43347fa6 100644
--- a/packages/sol-compiler/src/utils/types.ts
+++ b/packages/sol-compiler/src/utils/types.ts
@@ -55,6 +55,7 @@ export interface CompilerOptions {
     artifactsDir?: string;
     compilerSettings?: solc.CompilerSettings;
     contracts?: string[] | '*';
+    solcVersion?: string;
 }
 
 export interface ContractSourceData {