chore(middleware): update credential provider to memoized provider interface

Author: AllanZhengYP

packages/credential-provider-node/src/defaultProvider.ts

@@ -6,7 +6,7 @@ import { fromSSO, FromSSOInit } from "@aws-sdk/credential-provider-sso";
 import { fromTokenFile, FromTokenFileInit } from "@aws-sdk/credential-provider-web-identity";
 import { chain, CredentialsProviderError, memoize } from "@aws-sdk/property-provider";
 import { loadSharedConfigFiles } from "@aws-sdk/shared-ini-file-loader";
-import { CredentialProvider } from "@aws-sdk/types";
+import { Credentials, MemoizedProvider } from "@aws-sdk/types";
 import { ENV_PROFILE } from "@aws-sdk/util-credentials";
 
 import { remoteProvider } from "./remoteProvider";
@@ -47,7 +47,7 @@ import { remoteProvider } from "./remoteProvider";
  */
 export const defaultProvider = (
   init: FromIniInit & RemoteProviderInit & FromProcessInit & FromSSOInit & FromTokenFileInit = {}
-): CredentialProvider => {
+): MemoizedProvider<Credentials> => {
   const options = {
     profile: process.env[ENV_PROFILE],
     ...init,

packages/middleware-endpoint-discovery/src/resolveEndpointDiscoveryConfig.ts

@@ -1,11 +1,11 @@
 import { EndpointCache } from "@aws-sdk/endpoint-cache";
-import { Credentials, Provider } from "@aws-sdk/types";
+import { Credentials, MemoizedProvider, Provider } from "@aws-sdk/types";
 
 export interface EndpointDiscoveryInputConfig {}
 
 export interface PreviouslyResolved {
   isCustomEndpoint: boolean;
-  credentials: Provider<Credentials>;
+  credentials: MemoizedProvider<Credentials>;
   endpointDiscoveryEnabledProvider: Provider<boolean | undefined>;
 }
 

packages/middleware-sdk-ec2/src/index.ts

@@ -9,14 +9,15 @@ import {
   InitializeHandlerOptions,
   InitializeHandlerOutput,
   InitializeMiddleware,
+  MemoizedProvider,
   MetadataBearer,
   Pluggable,
   Provider,
 } from "@aws-sdk/types";
 import { formatUrl } from "@aws-sdk/util-format-url";
 
 interface PreviouslyResolved {
-  credentials: Provider<Credentials>;
+  credentials: MemoizedProvider<Credentials>;
   endpoint: Provider<Endpoint>;
   region: Provider<string>;
   sha256: HashConstructor;

packages/middleware-sdk-rds/src/index.ts

@@ -9,6 +9,7 @@ import {
   InitializeHandlerOptions,
   InitializeHandlerOutput,
   InitializeMiddleware,
+  MemoizedProvider,
   MetadataBearer,
   Pluggable,
   Provider,
@@ -28,7 +29,7 @@ const sourceIdToCommandKeyMap: { [key: string]: string } = {
 const version = "2014-10-31";
 
 interface PreviouslyResolved {
-  credentials: Provider<Credentials>;
+  credentials: MemoizedProvider<Credentials>;
   endpoint: Provider<Endpoint>;
   region: Provider<string>;
   sha256: HashConstructor;

packages/middleware-signing/src/configurations.ts

@@ -4,6 +4,7 @@ import {
   Credentials,
   HashConstructor,
   Logger,
+  MemoizedProvider,
   Provider,
   RegionInfo,
   RegionInfoProvider,
@@ -97,7 +98,7 @@ export interface AwsAuthResolvedConfig {
   /**
    * Resolved value for input config {@link AwsAuthInputConfig.credentials}
    */
-  credentials: Provider<Credentials>;
+  credentials: MemoizedProvider<Credentials>;
   /**
    * Resolved value for input config {@link AwsAuthInputConfig.signer}
    */
@@ -211,7 +212,9 @@ const normalizeProvider = <T>(input: T | Provider<T>): Provider<T> => {
   return input as Provider<T>;
 };
 
-const normalizeCredentialProvider = (credentials: Credentials | Provider<Credentials>): Provider<Credentials> => {
+const normalizeCredentialProvider = (
+  credentials: Credentials | Provider<Credentials>
+): MemoizedProvider<Credentials> => {
   if (typeof credentials === "function") {
     return memoize(
       credentials,