Method encode

src/microReticulum/Persistence/DestinationEntry.cpp:31–71

Encodes a DestinationEntry as a 7-element MsgPack array: [timestamp, hops, expires, received_from, random_blobs, receiving_interface, announce_packet] random_blobs is itself an array of length-prefixed binary blobs, tail-trimmed to PERSIST_RANDOM_BLOBS to bound on-disk size. Adding new fields in the future is a matter of bumping the outer array length and appending; old decoders see the extra ele

// is a matter of bumping the outer array length and appending; old decoders see
// the extra elements as trailing array members they can ignore.
/*static*/ std::vector<uint8_t> microStore::Codec<DestinationEntry>::encode(const DestinationEntry& entry) {

	// If invalid/empty entry then return empty
	if (!entry) return {};

	MsgPack::Packer p;
	p.packArraySize(7);

	// timestamp
	p.packFloat64(entry._timestamp);

	// hops
	p.serialize(entry._hops);

	// expires
	p.packFloat64(entry._expires);

	// received_from
	p.packBinary(entry._received_from.data(), entry._received_from.size());

	// random_blobs -- write only the tail-newest PERSIST_RANDOM_BLOBS entries
	const size_t persist_cap = Type::Transport::PERSIST_RANDOM_BLOBS;
	const size_t total_blobs = entry._random_blobs.size();
	const size_t persist_n   = (total_blobs > persist_cap) ? persist_cap : total_blobs;
	const size_t start_idx   = total_blobs - persist_n;
	p.packArraySize(persist_n);
	for (size_t i = start_idx; i < total_blobs; i++) {
		const auto& blob = entry._random_blobs[i];
		p.packBinary(blob.data(), blob.size());
	}

	// receiving_interface (hash only; the live Interface is re-bound on decode)
	Bytes interface_hash(entry._receiving_interface.get_hash());
	p.packBinary(interface_hash.data(), interface_hash.size());

	// announce_packet (raw bytes, including header)
	const Bytes& raw = entry._announce_packet.raw();
	p.packBinary(raw.data(), raw.size());

	return std::vector<uint8_t>(p.data(), p.data() + p.size());
}

/*static*/ bool microStore::Codec<DestinationEntry>::decode(const std::vector<uint8_t>& data, DestinationEntry& entry)
{