[fix] allow asset importers to define which content they can load

script/crypto-assets-importer/importers/ethereum-plugins.js

@@ -1,4 +1,5 @@
 const path = require("path");
+const fs = require('fs');
 const isEqual = require("lodash/isEqual");
 const { readFileJSON } = require("../utils");
 
@@ -34,6 +35,11 @@ module.exports = {
 
   outputTemplate: (data) => JSON.stringify(data, null, 2),
 
+  shouldLoad: ({ folder, id }) => {
+    const b2cFilePath = path.join(folder, id, "b2c.json");
+    return fs.existsSync(b2cFilePath);
+  },
+
   loader: async ({ signatureFolder, folder, id }) => {
     const [signatures, bare] = await Promise.all([
       readFileJSON(path.join(signatureFolder, id, "b2c_signatures.json")),

script/crypto-assets-importer/index.js

@@ -34,9 +34,10 @@ axios
           const folder = path.join(inputFolder, "assets", p);
           const signatureFolder = path.join(inputFolder, "signatures/prod/", p);
           const items = fs.readdirSync(folder);
+          const shouldLoad = ((id) => imp.shouldLoad ? imp.shouldLoad({ folder, id }) : !id.endsWith(".json"));
           return promiseAllBatched(
             50,
-            items.sort().filter((a) => !a.endsWith(".json")),
+            items.sort().filter(shouldLoad),
             (id) =>
               Promise.resolve()
                 .then(() => imp.loader({ signatureFolder, folder, id }))