> + return q.poll().toString();
> + }
> +
> + /**
> + * Build the Hash and the TreeHash values of the payload.
> + */
> + public void buildHashes() throws IOException {
> + InputStream is = payload.openStream();
> + Hasher hasher = Hashing.sha256().newHasher();
> + Queue<HashCode> q = Lists.newLinkedList();
> +
> + //Divide the payload in chunks and queue them.
> + byte[] buffer = new byte[CHUNK_SIZE];
> + int bytesRead;
> + while ((bytesRead = is.read(buffer)) >= 0) {
> + q.offer(Hashing.sha256().hashBytes(buffer, 0, bytesRead));
Can you rewrite this with `HashingInputStream` to avoid buffering `CHUNK_SIZE`
bytes?
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