Add additional HttpAuthScheme interfaces for auth scheme resolution

.changeset/gorgeous-rabbits-collect.md

@@ -0,0 +1,5 @@
+---
+"@smithy/experimental-identity-and-auth": patch
+---
+
+Add additional `HttpAuthScheme` interfaces for auth scheme resolution

packages/experimental-identity-and-auth/src/HttpAuthScheme.ts

@@ -38,3 +38,12 @@ export interface HttpAuthOption {
   identityProperties?: Record<string, unknown>;
   signingProperties?: Record<string, unknown>;
 }
+
+/**
+ * @internal
+ */
+export interface SelectedHttpAuthScheme {
+  httpAuthOption: HttpAuthOption;
+  identity: Identity;
+  signer: HttpSigner;
+}

packages/experimental-identity-and-auth/src/HttpAuthSchemeProvider.ts

@@ -0,0 +1,27 @@
+import { HandlerExecutionContext } from "@smithy/types";
+
+import { HttpAuthOption } from "./HttpAuthScheme";
+
+/**
+ * @internal
+ */
+export interface HttpAuthSchemeParameters {
+  operation?: string;
+}
+
+/**
+ * @internal
+ */
+export interface HttpAuthSchemeProvider<TParameters extends HttpAuthSchemeParameters = HttpAuthSchemeParameters> {
+  (authParameters: TParameters): HttpAuthOption[];
+}
+
+/**
+ * @internal
+ */
+export interface HttpAuthSchemeParametersProvider<
+  C extends object = object,
+  T extends HttpAuthSchemeParameters = HttpAuthSchemeParameters
+> {
+  (config: C, context: HandlerExecutionContext): Promise<T>;
+}

packages/experimental-identity-and-auth/src/index.ts

@@ -1,4 +1,5 @@
 export * from "./HttpAuthScheme";
+export * from "./HttpAuthSchemeProvider";
 export * from "./HttpSigner";
 export * from "./IdentityProviderConfig";
 export * from "./SigV4Signer";