Move compiler URL to constants

packages/deployer/src/compiler.ts

@@ -196,7 +196,7 @@ export class Compiler {
             solcjs = fs.readFileSync(compilerBinFilename).toString();
         } else {
             utils.consoleLog(`Downloading ${fullSolcVersion}...`);
-            const url = `https://ethereum.github.io/solc-bin/bin/${fullSolcVersion}`;
+            const url = `${constants.BASE_COMPILER_URL}${fullSolcVersion}`;
             const response = await fetch(url);
             if (response.status !== 200) {
                 throw new Error(`Failed to load ${fullSolcVersion}`);

packages/deployer/src/utils/constants.ts

@@ -1,3 +1,4 @@
 export const constants = {
     SOLIDITY_FILE_EXTENSION: '.sol',
+    BASE_COMPILER_URL: 'https://ethereum.github.io/solc-bin/bin/',
 };