refactor storageRangeWeb3Call

libs/remix-debug/src/storage/storageResolver.js

@@ -91,10 +91,8 @@ class StorageResolver {
       if (cached && cached.storage[slotKey]) { // we have the current slot in the cache and maybe the next 1000...
         return resolve(cached.storage)
       }
-      this.storageRangeWeb3Call(tx, address, slotKey, self.maxSize, (error, storage, nextKey) => {
+      this.storageRangeWeb3Call(tx, address, slotKey, self.maxSize).then((result) => {
-        if (error) {
+        const [storage, nextKey] = result
-          return reject(error)
-        }
         if (!storage[slotKey] && slotKey !== self.zeroSlot) { // we don't cache the zero slot (could lead to inconsistency)
           storage[slotKey] = {
             key: slotKey,
@@ -106,7 +104,7 @@ class StorageResolver {
           self.storageByAddress[address].complete = true
         }
         return resolve(storage)
-      })
+      }).catch(reject)
     })
   }
 
@@ -136,9 +134,10 @@ class StorageResolver {
     self.storageByAddress[address].storage = Object.assign(self.storageByAddress[address].storage || {}, storage)
   }
 
-  storageRangeWeb3Call (tx, address, start, maxSize, callback) {
+  storageRangeWeb3Call (tx, address, start, maxSize) {
+    return new Promise((resolve, reject) => {
       if (traceHelper.isContractCreation(address)) {
-      callback(null, {}, null)
+        resolve([{}, null])
       } else {
         this.web3.debug.storageRangeAt(
           tx.blockHash, tx.transactionIndex === undefined ? tx.hash : tx.transactionIndex,
@@ -147,14 +146,15 @@ class StorageResolver {
           maxSize,
           (error, result) => {
             if (error) {
-            callback(error)
+              reject(error)
             } else if (result.storage) {
-            callback(null, result.storage, result.nextKey)
+              resolve([result.storage, result.nextKey])
             } else {
-            callback('the storage has not been provided')
+              reject('the storage has not been provided')
             }
           })
       }
+    })
   }
 }