/** Returns the merkle root in big endian form, calculating it from transactions if necessary. */
public Sha256Hash getMerkleRoot() {
maybeParseHeader();
if (merkleRoot == null) {
// TODO check if this is really necessary.
unCacheHeader();
merkleRoot = calculateMerkleRoot();
}
return merkleRoot;
}
private void unCacheTransactions() {
maybeParseTransactions();
transactionBytesValid = false;
if (!headerBytesValid) bytes = null;
// Current implementation has to uncache headers as well as any change to a tx will alter the
// merkle root. In
// future we can go more granular and cache merkle root separately so rest of the header does
// not need to be
// rewritten.
unCacheHeader();
// Clear merkleRoot last as it may end up being parsed during unCacheHeader().
merkleRoot = null;
}
void setNonce(long nonce) {
unCacheHeader();
this.nonce = nonce;
this.hash = null;
this.scryptHash = null;
}
void setDifficultyTarget(long compactForm) {
unCacheHeader();
this.difficultyTarget = compactForm;
this.hash = null;
this.scryptHash = null;
}
void setTime(long time) {
unCacheHeader();
this.time = time;
this.hash = null;
this.scryptHash = null;
}
void setPrevBlockHash(Sha256Hash prevBlockHash) {
unCacheHeader();
this.prevBlockHash = prevBlockHash;
this.hash = null;
this.scryptHash = null;
}
/** Exists only for unit testing. */
void setMerkleRoot(Sha256Hash value) {
unCacheHeader();
merkleRoot = value;
hash = null;
}