> + public String apply(String input) {
> + return input.toLowerCase();
> + }
> + }));
> + }
> +
> + private String sha256(byte[] unhashedBytes) {
> + return Hashing.sha256().hashBytes(unhashedBytes).toString();
> + }
> +
> + private String buildHashedPayload(HttpRequest request) {
> + String hashedPayload = "";
> + try {
> + byte[] unhashedBytes = request.getPayload() == null ? "".getBytes()
> : ByteStreams.toByteArray(request
> + .getPayload().getInput());
> + hashedPayload = sha256(unhashedBytes);
Return the result of ```sha256``` instead of using the local variable.
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