/*
* Block uses some special handling for lazy parsing and retention of cached bytes. Parsing and serializing the
* block header and the transaction list are both non-trivial so there are good efficiency gains to be had by
* separating them. There are many cases where a user may need access to access or change one or the other but not both.
*
* With this in mind we ignore the inherited checkParse() and unCache() methods and implement a separate version
* of them for both header and transactions.
*
* Serializing methods are also handled in their own way. Whilst they deal with separate parts of the block structure
* there are some interdependencies. For example altering a tx requires invalidating the Merkle root and therefore
* the cached header bytes.
*/
private void maybeParseHeader() {
if (headerParsed || bytes == null) return;
parseHeader();
if (!(headerBytesValid || transactionBytesValid)) bytes = null;
}
void parse() throws ProtocolException {
parseHeader();
parseTransactions();
length = cursor - offset;
}