fix external provider

apps/remix-ide/src/app/providers/abstract-provider.tsx

@@ -102,17 +102,15 @@ export abstract class AbstractProvider extends Plugin implements IProvider {
   sendAsync(data: JsonDataRequest): Promise<JsonDataResult> {
     // eslint-disable-next-line no-async-promise-executor
     return new Promise(async (resolve, reject) => {
-      if (!this.provider) return reject({ jsonrpc: '2.0', id: data.id, error: { message: 'provider node set', code: -32603 } } as JsonDataResult)
+      if (!this.provider) return reject({ jsonrpc: '2.0', id: data.id, error: { message: 'provider not set', code: -32603 } } as JsonDataResult)
       this.sendAsyncInternal(data, resolve, reject)
     })
   }
 
   private async switchAway(showError: boolean, msg: string) {
     if (!this.provider) return
-    this.provider = null
-    this.connected = false
     if (showError) {
-      this.call('notification', 'toast', 'Error while querying the provider: ' + msg)
+      this.call('terminal', 'log', { type: 'error', value: 'Error while querying the provider: ' + msg })
     }
     return
   }
@@ -138,10 +136,8 @@ export abstract class AbstractProvider extends Plugin implements IProvider {
           } catch (error) {
             this.switchAway(true, error.message ? error.message : error.error ? error.error : error)
           }
-
         }
-        error.code = -32603
-        reject({ jsonrpc: '2.0', error, id: data.id })
+        reject({ jsonrpc: '2.0', error: { message: error.message, code: -32603 }, id: data.id })
       }
     } else {
       const result = data.method === 'net_listening' ? 'canceled' : []

apps/remix-ide/src/app/udapp/run-tab.tsx

@@ -194,24 +194,7 @@ export class RunTab extends ViewPlugin {
             if (options['fork']) this.fork = options['fork']
           }
         },
-        provider: {
-          sendAsync (payload) {
-            return udapp.call(name, 'sendAsync', payload)
-          },
-          request (payload) {
-            return new Promise<any>((resolve, reject) => {
-              udapp.call(name, 'sendAsync', payload).then((response) => {
-                if (response.error) {
-                  reject(response.error.message)
-                } else {
-                  resolve(response)
-                }
-              }).catch((err) => {
-                reject(err)
-              })
-            })
-          }
-        }
+        provider: new Provider(udapp, name)
       })
     }
 
@@ -304,3 +287,43 @@ export class RunTab extends ViewPlugin {
     this.addInstance(address, contractObject.abi, contractObject.name)
   }
 }
+
+class Provider {
+  udapp: RunTab
+  name: string
+  constructor(udapp, name) {
+    this.udapp = udapp
+    this.name = name
+  }
+  sendAsync (payload) {
+    return this.udapp.call(this.name, 'sendAsync', payload)
+  }
+  request (payload): Promise<any> {
+    return new Promise((resolve, reject) => {
+      this.udapp.call(this.name, 'sendAsync', payload).then((response) => {
+        if (response.error) {
+          reject(response.error.message)
+        } else {
+          resolve(response)
+        }
+      }).catch((err) => {
+        if (typeof err === 'string') {
+          reject(err)
+        } else if (err.error && err.error.message) {
+          reject(err.error.message)
+        } else if (err.error && typeof err.error === 'string') {
+          reject(err.error)
+        } else {
+          let e
+          try {
+            e = JSON.stringify(err)            
+          } catch (e) {
+            reject('unknown error')
+            return
+          }
+          reject(e)
+        }
+      })
+    })
+  }
+}