/**
* Takes a Msg and encodes it into a single byte[], in a way that is compatible with the way that
* PyBitmessage does. This payload can then be sent to a server to be disseminated across the
* network. The payload is stored as a Payload object.
*
* @param encMsg - A msg Object containing the message data used to create the payload.
* @param powDone - A boolean value indicating whether or not POW has been done for this message
* @param toPubkey - A Pubkey object containing the data for the Pubkey of the address that this
* message is being sent to
* @return A Payload object containing the message payload
*/
private Payload constructMsgPayloadForDissemination(
BMObject encMsg, boolean powDone, Pubkey toPubkey) {
// Create a new Payload object to hold the payload data
Payload msgPayload = new Payload();
msgPayload.setBelongsToMe(true);
msgPayload.setPOWDone(powDone);
msgPayload.setType(Payload.OBJECT_TYPE_MSG);
// Encode the POW nonce, expiration time, object type, object version, and stream number values
// into byte form
byte[] powNonceBytes = ByteUtils.longToBytes(encMsg.getPOWNonce());
byte[] expirationTimeBytes = ByteUtils.longToBytes(encMsg.getExpirationTime());
byte[] objectTypeBytes = ByteUtils.intToBytes(OBJECT_TYPE_MSG);
byte[] objectVersionBytes = VarintEncoder.encode(OBJECT_VERSION_MSG);
byte[] streamNumberBytes = VarintEncoder.encode(encMsg.getStreamNumber());
byte[] payload = null;
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
try {
if (powDone) {
outputStream.write(powNonceBytes);
}
outputStream.write(expirationTimeBytes);
outputStream.write(objectTypeBytes);
outputStream.write(objectVersionBytes);
outputStream.write(streamNumberBytes);
outputStream.write(encMsg.getPayload());
payload = outputStream.toByteArray();
outputStream.close();
} catch (IOException e) {
throw new RuntimeException(
"IOException occurred in DataProcessor.constructMsgPayloadForDissemination()", e);
}
msgPayload.setPayload(payload);
// Save the Payload object to the database
PayloadProvider payProv = PayloadProvider.get(App.getContext());
long msgPayloadId = payProv.addPayload(msgPayload);
// Finally, set the msg payload ID to the one generated by the SQLite database
msgPayload.setId(msgPayloadId);
return msgPayload;
}
/**
* Takes a Msg and constructs the payload needed to do POW for it.
*
* @param msg - The msg Object to construct the POW payload for
* @return The POW payload
*/
private byte[] constructMsgPayloadForPOW(BMObject msg) {
try {
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
outputStream.write(
ByteUtils.longToBytes(
msg.getExpirationTime())); // This conversion results in a byte[] of length 8, which
// is what we want
outputStream.write(ByteUtils.intToBytes(OBJECT_TYPE_MSG));
outputStream.write(VarintEncoder.encode(OBJECT_VERSION_MSG));
outputStream.write(VarintEncoder.encode(msg.getStreamNumber()));
outputStream.write(msg.getPayload());
return outputStream.toByteArray();
} catch (IOException e) {
throw new RuntimeException(
"IOException occurred in OutgoingMessageProcessor.constructMsgPayloadForPOW()", e);
}
}
