chore(types): update BodyLengthCalculator to return number

Author: trivikr

packages/middleware-flexible-checksums/src/configuration.ts

@@ -10,7 +10,7 @@ export interface PreviouslyResolved {
   /**
    * A function that can calculate the length of a body.
    */
-  bodyLengthChecker: (body: any) => number | undefined;
+  bodyLengthChecker: (body: any) => number;
 
   /**
    * A function that returns Readable Stream which follows aws-chunked encoding stream.

packages/types/src/stream.ts

@@ -3,7 +3,7 @@ import { Encoder } from "./util";
 
 export interface GetAwsChunkedEncodingStreamOptions {
   base64Encoder?: Encoder;
-  bodyLengthChecker: (body: any) => number | undefined;
+  bodyLengthChecker: (body: any) => number;
   checksumAlgorithmFn?: HashConstructor;
   checksumLocationName?: string;
   streamHasher?: StreamHasher;

packages/types/src/util.ts

@@ -51,7 +51,7 @@ export interface Provider<T> {
  * the size of the file.
  */
 export interface BodyLengthCalculator {
-  (body: any): number | undefined;
+  (body: any): number;
 }
 
 /**