subprovider - rename web3 to provider

subproviders/provider.js

@@ -0,0 +1,20 @@
+const inherits = require('util').inherits
+const Subprovider = require('./subprovider.js')
+
+// wraps a provider in a subprovider interface
+
+module.exports = ProviderSubprovider
+
+inherits(ProviderSubprovider, Subprovider)
+
+function ProviderSubprovider(provider){
+  this.provider = provider
+}
+
+ProviderSubprovider.prototype.handleRequest = function(payload, next, end){
+  this.provider.sendAsync(payload, function(err, response) {
+    if (err) return end(err)
+    if (response.error) return end(new Error(response.error.message))
+    end(null, response.result)
+  })
+}