Rename and move crypto.IBootstrapCrossSigningOpts (#3352)

* Define `UIAuthCallback` type and use in `IBootstrapCrossSigningOpts`

* Move `IBootstrapCrossSigningOpts` to `crypto-api` and rename

* Replace uses of `IBootstrapCrossSigningOpts`

... with `BootstrapCrossSigningOpts`

* Update src/crypto-api.ts

src/interactive-auth.ts

@@ -20,6 +20,7 @@ import { logger } from "./logger";
 import { MatrixClient } from "./client";
 import { defer, IDeferred } from "./utils";
 import { MatrixError } from "./http-api";
+import { UIAResponse } from "./@types/uia";
 
 const EMAIL_STAGE_TYPE = "m.login.email.identity";
 const MSISDN_STAGE_TYPE = "m.login.msisdn";
@@ -118,6 +119,16 @@ export class NoAuthFlowFoundError extends Error {
     }
 }
 
+/**
+ * The type of an application callback to perform the user-interactive bit of UIA.
+ *
+ * It is called with a single parameter, `makeRequest`, which is a function which takes the UIA parameters and
+ * makes the HTTP request.
+ *
+ * The generic parameter `T` is the type of the response of the endpoint, once it is eventually successful.
+ */
+export type UIAuthCallback<T> = (makeRequest: (authData: IAuthDict) => Promise<UIAResponse<T>>) => Promise<T>;
+
 interface IOpts {
     /**
      * A matrix client to use for the auth process