public static void write(FileChannel channel, StoredBlock block) throws IOException {
ByteBuffer buf = ByteBuffer.allocate(Record.SIZE);
buf.putInt(block.getHeight());
byte[] chainWorkBytes = block.getChainWork().toByteArray();
checkState(
chainWorkBytes.length <= CHAIN_WORK_BYTES, "Ran out of space to store chain work!");
if (chainWorkBytes.length < CHAIN_WORK_BYTES) {
// Pad to the right size.
buf.put(EMPTY_BYTES, 0, CHAIN_WORK_BYTES - chainWorkBytes.length);
}
buf.put(chainWorkBytes);
buf.put(block.getHeader().cloneAsHeader().feathercoinSerialize());
buf.position(0);
channel.position(channel.size());
if (channel.write(buf) < Record.SIZE) throw new IOException("Failed to write record!");
channel.position(channel.size() - Record.SIZE);
}
