move/refactor getBalanceInEther to their own providers

src/blockchain/blockchain.js

@@ -404,26 +404,7 @@ class Blockchain {
 
   /** Get the balance of an address, and convert wei to ether */
   getBalanceInEther (address, cb) {
-    address = stripHexPrefix(address)
-
-    if (!this.executionContext.isVM()) {
-      return this.executionContext.web3().eth.getBalance(address, (err, res) => {
-        if (err) {
-          return cb(err)
-        }
-        cb(null, Web3.utils.fromWei(res.toString(10), 'ether'))
-      })
-    }
-    if (!this.providers.vm.accounts) {
-      return cb('No accounts?')
-    }
-
-    this.executionContext.vm().stateManager.getAccount(Buffer.from(address, 'hex'), (err, res) => {
-      if (err) {
-        return cb('Account not found')
-      }
-      cb(null, Web3.utils.fromWei(new BN(res.balance).toString(10), 'ether'))
-    })
+    this.getCurrentProvider().getBalanceInEther(address, cb)
   }
 
   pendingTransactionsCount () {

src/blockchain/providers/injected.js

+const Web3 = require('web3')
 
 class InjectedProvider {
 
@@ -11,6 +12,16 @@ class InjectedProvider {
 
   resetEnvironment () {
   }
+
+  getBalanceInEther (address, cb) {
+    address = stripHexPrefix(address)
+    this.executionContext.web3().eth.getBalance(address, (err, res) => {
+      if (err) {
+        return cb(err)
+      }
+      cb(null, Web3.utils.fromWei(res.toString(10), 'ether'))
+    })
+  }
 }
 
 module.exports = InjectedProvider

src/blockchain/providers/node.js

+const Web3 = require('web3')
 
 class NodeProvider {
 
@@ -15,6 +16,16 @@ class NodeProvider {
 
   resetEnvironment () {
   }
+
+  getBalanceInEther(address, cb) {
+    address = stripHexPrefix(address)
+    this.executionContext.web3().eth.getBalance(address, (err, res) => {
+      if (err) {
+        return cb(err)
+      }
+      cb(null, Web3.utils.fromWei(res.toString(10), 'ether'))
+    })
+  }
 }
 
 module.exports = NodeProvider

src/blockchain/providers/vm.js

+const Web3 = require('web3')
 const { privateToAddress, toChecksumAddress } = require('ethereumjs-util')
 
 class VMProvider {
@@ -42,6 +43,16 @@ class VMProvider {
     this.accounts[toChecksumAddress('0x' + address.toString('hex'))] = { privateKey, nonce: 0 }
   }
 
+  getBalanceInEther (address, cb) {
+    address = stripHexPrefix(address)
+
+    this.executionContext.vm().stateManager.getAccount(Buffer.from(address, 'hex'), (err, res) => {
+      if (err) {
+        return cb('Account not found')
+      }
+      cb(null, Web3.utils.fromWei(new BN(res.balance).toString(10), 'ether'))
+    })
+  }
 }
 
 module.exports = VMProvider