add extension filtered account subscriptions (#1063)

* add  extension filtered account subscriptions

* fix floating promise

* add extensions filter as account option

* Update packages/extension-dapp/src/bundle.ts

Co-authored-by: Jaco <jacogr@gmail.com>

* fix lint issue

Co-authored-by: Jaco <jacogr@gmail.com>

packages/extension-dapp/src/bundle.ts

@@ -109,7 +109,7 @@ export function web3Enable (originName: string, compatInits: (() => Promise<bool
 }
 
 // retrieve all the accounts across all providers
-export async function web3Accounts ({ accountType, ss58Format }: Web3AccountsOptions = {}): Promise<InjectedAccountWithMeta[]> {
+export async function web3Accounts ({ accountType, extensions, ss58Format }: Web3AccountsOptions = {}): Promise<InjectedAccountWithMeta[]> {
   if (!web3EnablePromise) {
     return throwError('web3Accounts');
   }
@@ -118,7 +118,9 @@ export async function web3Accounts ({ accountType, ss58Format }: Web3AccountsOpt
   const injected = await web3EnablePromise;
 
   const retrieved = await Promise.all(
-    injected.map(async ({ accounts, name: source }): Promise<InjectedAccountWithMeta[]> => {
+    injected.filter(
+      ({ name: source }) => !extensions || extensions.includes(source)
+    ).map(async ({ accounts, name: source }): Promise<InjectedAccountWithMeta[]> => {
       try {
         const list = await accounts.get();
 
@@ -141,7 +143,7 @@ export async function web3Accounts ({ accountType, ss58Format }: Web3AccountsOpt
   return accounts;
 }
 
-export async function web3AccountsSubscribe (cb: (accounts: InjectedAccountWithMeta[]) => void | Promise<void>, { ss58Format }: Web3AccountsOptions = {}): Promise<Unsubcall> {
+export async function web3AccountsSubscribe (cb: (accounts: InjectedAccountWithMeta[]) => void | Promise<void>, { extensions, ss58Format }: Web3AccountsOptions = {}): Promise<Unsubcall> {
   if (!web3EnablePromise) {
     return throwError('web3AccountsSubscribe');
   }
@@ -160,7 +162,9 @@ export async function web3AccountsSubscribe (cb: (accounts: InjectedAccountWithM
       )
     );
 
-  const unsubs = (await web3EnablePromise).map(
+  const unsubs = (await web3EnablePromise).filter(
+    ({ name: source }) => !extensions || extensions.includes(source)
+  ).map(
     ({ accounts: { subscribe }, name: source }): Unsubcall =>
       subscribe((result): void => {
         accounts[source] = result;

packages/extension-inject/src/types.ts

@@ -113,5 +113,6 @@ export type InjectOptions = InjectedExtensionInfo;
 
 export interface Web3AccountsOptions {
   ss58Format?: number,
-  accountType?: KeypairType[]
+  accountType?: KeypairType[],
+  extensions?: string[]
 }