These changes are for allowing devices to be shipped with an interim blockchain config & genesis block, running with "main-net" settings, prior to launch.
At launch, an "auto-update" will be broadcast to replace blockchain config & genesis block with the final, launch version.
When updated nodes restart (immediately after auto-update) they should notice their existing genesis blocks are invalid and hence wipe their blockchains,
effectively starting the final, launch blockchain.
To this end, genesis block signatures have been changed to better incorporate values that are likely to change at launch, e.g. block timestamp and transaction data.
Added Crypto.dupDigest(), which is effectively Bytes.concat(digest(msg), digest(msg)).
No need for HSQLDB repository to backup, or wipe, non-existent files for "in-memory" databases!
New interim blockchain config/genesis block.
**NOTE** These changes are being committed but require testing. However the auto-update suite requires a pushed commit in order to build an update file!
Now reward-shares with zero percent are valid, to allow the 'recipient' party to gain
"number of minted blocks" but no actual block reward.
Correspondly, the special zero share used to cancel reward-shares has been changed to
be any negative value.
Block rewards, founder 'leftovers': if founder is minter account in any online
reward shares, then the per-founder-share is spread across their online reward-shares,
otherwise it's simply/wholy given to that founder.
Created a new DB table to hold "next block height", updated via triggers on Blocks.
This is so various sub-queries can simply read the next-block-height value instead
of complex IFNULL(MAX(height),0)+1 or SELECT height FROM Blocks ORDER BY height DESC.
Prior code was also broken in edge cases, e.g. no genesis block, or ran slow.
Added tests to cover above.
Deleted BTC tests as they're obsolete.
Added/improved other tests.
*** WARNING ***
Possible block reward bug in this commit. Further investigation needed.
Reverted AccountBalances back to height-less form.
Added HistoricAccountBalances table that is populated via trigger on AccountBalances.
This saves work when performing common requests for latest/confirmed balances,
shunting the extra work to when requesting height-related account balances.
Unified API call GET /addresses/balance/{address} by having address/assetId/height as
query params.
Simpler call for fetching legacy QORA holders during block rewarding.
Improved SQL for fetching asset balances, in all conditions,
e.g. with/without filtering addresses, with/without filtering assetIds,
etc.
Unit test for above to make sure query execution is fast enough.
(At one point, some SQL query was taking 6 seconds!)
Added optional 'height' Integer to AccountBalanceData, but this
is not populated/used very often.
HSQLDBAccountRepository.save(AccountBalanceData) now checks zero balance saves
to see if the row can be deleted instead. This fixes a lot of unhappy tests
that complain that there are residual account balance rows left after
post-test orphaning back to genesis block.
Yet more tests.
Removed very old 'TransactionTests' which are mostly covered in more specific tests elsewhere.
Added cancel-sell-name test from above.
Fixed AssetsApiTests to check for QORT not QORA!
Changed hard-coded assetIDs in test.common.AssetUtils in light of new LEGACY_QORA & QORT_FROM_QORA genesis assets.
Some test blockchain config changes.
Also:
RewardShareKeys app now supports only one arg (minter private key)
in self-reward-share mode, where recipient public key is derived
from minter private key.
Added methods to Account for returning 'effective' minting level
where minting level for founders is read from blockchain config.
(Or returns zero if unable to mint).
Changed two Block constructors into static methods that return
a new Block as there was way too much work being done to really
be called a constructor, especially with all the opportunities
to throw an exception too.
Main blockchain config updated to reflect near-launch version.
Added/changed blockchain weight tests to check block winning
based on higher account levels.
Added Transaction.isFeeValid() to allow transaction subclasses to override and allow zero fees, etc.
Added tests to cover self-reward-shares, including zero fee scenario.
Set 'dilbert' test account to level 8 in test genesis block.
Removed leftover mention of "previous_level" from HSQLDBAccountLevelTransactions,
and AccountLevelTransactionData. (Previous level makes no sense as ACCOUNT_LEVEL
transactions are genesis-block only).
Fixed some incorrect uses of PrivateKeyAccount.getSharedSecret() to
PrivateKeyAccount.getRewardSharePrivateKey() in tests.
Unified terminology from block "generator", "forger", etc. to "minter"
Unified terminology "proxy forger" to "reward share" as it was
incorrect, or at least highly ambiguous, which account had which role.
AccountRepository.findRewardShares() has different arg order!
Account.canMint() now returns true if account has 'founder' flag set.
Added Account.canRewardShare() which returns whether acocunt can create
a reward-share (e.g. level 5+ or founder).
Fixed HSQLDBAssetRepository.getAllAssets() which had incorrect
resultSet column indexes.
Removed old traces of EnableForging transaction.
ACCOUNT_LEVEL and ACCOUNT_FLAGS (genesis-block-only transaction types)
now set target account's last-reference. This is allow later REWARD_SHARE
transactions in genesis block and post-genesis transactions by that account.
REWARD_SHARE transactions are now FREE, but only if minter is also recipient.
If a self-reward-share already exists, then unless share-percent is zero (to
terminate reward-share), any subsequent self-reward-share is invalid.
Updated SysTray i18n properties file.
BlockChain config file requires 'minAccountLevelToRewardShare' and optional
'minAccountLevelToMint'.
Added potential, but currently unused, memory-hard PoW algorithm.
Fixed/removed/disabled some unit tests.
BlockMinter.generateTestingBlock asks Controller to pretend mintingAccount is 'online'.
More testing needed!
Rename Asset.QORA to Asset.QORT so we can also have Asset.LEGACY_QORA
as another hard-coded asset.
Add "is unspendable" aspect to assets where only the asset owner can
transfer/pay asset to other people. Asset trading is barred regardless,
as is use of asset for ATs.
Added "initial level" to account data in preparation for accounts levelling
up from generating blocks.
Added distribution/removal of block reward based on legacy-QORA held.
Removed "previous level" from ACCOUNT_LEVEL transactions as they're
only ever valid in genesis block and so previous level is never needed.
Synchronizer incorrectly tried to compare chain weights in the case
where we had no extra blocks after common block, and thus no blocks
to actually compare.
During chain compare, when more block summaries are needed from peer,
the block signature sent to peer wasn't updated from the last batch
and so the same common block signature was sent. This caused the
code to incorrectly bail out with
"Peer respond with invalid block summary" error as the block heights
didn't match.
Post chain-compare/orphan (if any), and when fetching block signatures,
the code referenced peerBlockSummaries where it should have been
referencing peerBlockSignatures instead. This caused to code to incorrectly
bail out with the "Peer failed to respond with more block signatures..."
error.
Updated pom.xml.
Updated dependencies, including various minor code mods, esp. bitcoin-related.
Starts up and talks to Java 8 nodes!
Dev environment should be at least Eclipse 4.11 with m2e 1.9.1+
API call GET /addresses/online reports online accounts,
including both addresses relating to the proxy-forge public key.
New PeerChainTipData class to replace the broken "peer data lock"
that was supposed to make sure peer's last height/blockSig/timestamp
were all in sync. Now peer's chain tip data is a single object
reference that can be replaced in one go.
Removed pointless API calls /blocks/time and /blocks/{generatingbalance}.
Various changes, mostly in Block class, to do with switching to BlockTimingByHeight
from old min/max block time.
New block 'weight' based on number of online accounts
and 'distance' of perturbed generator public key from 'ideal' public key
(for that particular block's height).
New sub-chain 'weight' based on accumulating block weights,
currently by shifting previous accumulator left by 8 bits then
adding next block's weight.
More validation of BlockChain config. Helpful for debugging, probably
not very useful to end-users.
BlockGenerator now uses unified Peer predicates from Controller, like:
Controller.hasMisbehaved, Controller.hasNoRecentBlock, etc.
Controller now keeps a list of chain-tip signatures that are for inferior
chains, so it doesn't try to synchronize with peers with inferior chains.
(This list is wiped when node's blockchain changes/block is generated).
Controller now asks Gui to display error box if it can't parse Settings.
Controller.potentiallySynchronize() does more filtering of potential peers
before calling actuallySynchronize(). (Mostly moved from Synchronizer,
so now we expect actuallySynchronize() to do something rather than bail
out because it doesn't like the peer after all).
If synchronization discovers that peer has an inferior chain,
then Controller notifies that peer of our superior chain, to help keep
the network in sync.
Renamed OnlineAccount to OnlineAccountData, as it is in package org.qora.data
after all...
Synchronizer reworked to request block summaries so it can judge which chain
is better, and hence whether to sync with peer or abort.
Slight optimization of Peer.readChannel() to exit earlier if no more network
messages can be extracted from buffer.
More tests.
Improved documentation and logging.
Block.MAX_BLOCK_BYTES now BlockChain.getMaxBlockSize()
Network.MAXIMUM_MESSAGE_SIZE now Network.getMaxMessageSize() as
it depends on block size (above).
Block data now includes number of online accounts, as encoded online account indexes can't be
validated by ConciseSet it seems.
Corresponding changes to repository, transformer, block validation, data object, block summaries...
Block timestamps are now calculated using parent block data and generator's public key,
instead of old qora1 generating balance code.
Generators are valid to forge if they have forging flag enabled. This will probably change
to an account-level check in the near future.
Added trimming of old online accounts signatures from blocks.
Tidied up SysTray/BlockGenerator generation enabled/possible flag.
Although we perform online accounts tasks (currently) every 10 seconds,
only broadcast our online accounts every 60 seconds.
In Controller.main(), if args are present then use first as a filename to
settings JSON file (overriding the default filename).
Still to do: change Block/BlockChain/Synchronizer to prefer blocks with more online accounts,
failing that use generator nearest 'ideal', etc.
Safety commit in case of data loss!
Lots of changes to do with "online accounts", including:
* networking
+ GET_ONLINE_ACCOUNTS * ONLINE_ACCOUNTS messages & handling
+ Changes to serialization of block data to include online accounts info
* block-related
+ Adding online accounts info when generating blocks
+ Validating online accounts info in block data
+ Repository changes to store online accounts info
* Controller
+ Managing in-memory cache of online accounts
+ Updating/broadcasting our online accounts
* BlockChain config
Added "account levels", so new code/changes required in the usual places, like:
* transaction data object
* repository
* transaction transformer
* transaction processing
Orphaning a BUY_NAME transaction would not reinstate the
sale price. Sale price could be nullified by (e.g.) orphaning
a SELL_NAME transaction.
Also added test case to cover above and other test-related support,
e.g. test-mode in NTP.
Added "volatile" to more fields, for thread-safety on reads.
Changes to field values are done inside synchronized blocks
so no need for AtomicInteger/AtomicBoolean. (Could be changed
in the future to show intention/readability though).
Added more statistics (tasks produced/consumed).
Limited Network's EPC executor to 10 threads max.
Some asset-related transactions (CREATE_ASSET_ORDER and TRANSFER_ASSET)
also try to fetch asset names at the same time.
If one of these transactions, and a corresponding ISSUE_ASSET transaction,
have been orphaned then it's possible that the asset no longer exists.
Thus the SQL "JOIN" fails during transaction retrieval, causing an error.
Changing the table-join to "LEFT OUTER JOIN" makes the asset name aspect
optional. Repercussions might be nameless assets when fetching transaction
info via API.
Transaction expiry wasn't happening. Use NTP.getTime to check whether
transactions have expired. Also reject expired transactions when trying
to add them to unconfirmed pool.
Sometimes producing a task took way too long, causing massive
spikes in the number of threads and peer disconnections.
This is down to a repository pool exhaustion, so
RepositoryManager.getRepository() would block (for up to 5 minutes).
The key method at fault was Network.getConnectablePeer().
Various fixes:
NetworkProcessor's executor now reaps old threads after only 10 seconds
instead of the usual 60 seconds.
Change logging in Network to help diagnose disconnection and repository
issues.
RepositoryManager now has a tryRepository() call that is non-blocking
and returns null if repository pool is exhausted.
Repository pool size increased from default (10) to 100.
Pruning peers is now opportunistic, using tryRepository(), and returns
early if repository pool is exhausted.
getConnectablePeer() is now opportunistic, using tryRepository(), and
returns null (no peer candidate for connection) if repository pool
is exhausted.
Merging peers is not opportunistic, using tryRepository().
Peer ping interval increased from 8s to 20s.
HSQLDBRepositoryFactory now logs when getConnection() takes over 1000ms.
Added more trace-level logging to ExecuteProduceConsume to
highlight slow produceTask() calls.
Symptoms were on Ubuntu with 8u222:
Exception in thread "Controller" java.awt.AWTError: Assistive Technology not found: org.GNOME.Accessibility.AtkWrapper
at java.awt.Toolkit.loadAssistiveTechnologies(Toolkit.java:807)
at java.awt.Toolkit.getDefaultToolkit(Toolkit.java:886)
at java.awt.SystemTray.isSupported(SystemTray.java:219)
at org.qora.gui.SysTray.<init>(SysTray.java:50)
at org.qora.gui.SysTray.getInstance(SysTray.java:249)
at org.qora.controller.Controller.updateSysTray(Controller.java:480)
at org.qora.controller.Controller.run(Controller.java:368)
(Underlying cause not known)
This would cause Controller thread to silently exit, and so no
synchronization would occur. Node would still have connections
and thus happily generate its own blocks on its on fork.
Maybe other peers would try to sync with this node but would
likely reject this node's chain after a short while.
New NTP class now runs as a simplistic NTP client, repeatedly polling
several NTP servers and maintaining a more accurate time independent
of operating system.
Several occurrences of System.currentTimeMillis() replaced with NTP.getTime()
particularly where block/transaction/networking is involved.
GET /admin/info now includes "currentTimestamp" as reported from NTP.
Added support for block timestamps determined by generator, instead of
supplied by clock. (BlockChain.newBlockTimestampHeight - not yet activated).
Incorrect timestamps will produce a TIMESTAMP_INCORRECT Block.ValidationResult.
Block.calcMinimumTimestamp repurposed as Block.calcTimestamp for above.
Block timestamps are now allowed to be max 2000ms in the future,
was previously max 500ms.
Block generation prohibited until initial NTP sync.
Instead of deleting INVALID unconfirmed transactions in BlockGenerator,
Controller now deletes EXPIRED unconfirmed transactions every so often.
This also fixes persistent expired unconfirmed transactions on nodes
that do not generate blocks, as BlockGenerator.deleteInvalidTransactions()
was never reached.
Abbreviated block sigs added to log entries declaring a new block is generated
in BlockGenerator.
Controller checks for NTP sync much faster during start-up and SysTray's
tooltip text starts as "Synchronizing clock" until NTP sync occurs.
After NTP sync, Controller logs NTP offset every so often (currently every 5 mins).
When considering synchronizing, Controller skips peers that have the same block sig
as last time when synchronization resulted in no action, e.g. INFERIOR_CHAIN,
NOTHING_TO_DO and also OK. OK is included as another sync attempt would result in
NOTHING_TO_DO.
Previously this skipping check only happened after prior INFERIOR_CHAIN.
During inbound peer handshaking, if we receive a peer ID that matches an existing inbound
peer then send peer ID of all zeros, then close connection.
Remote end should detect this and cleanly close connection instead of waiting for handshake timeout.
Randomly generated peer IDs have lowest bit set to avoid all zeros.
Might need further work.
Networking doesn't connect, or accept, until NTP has synced.
Transaction validation can fail with CLOCK_NOT_SYNCED if NTP not synced.
It seems unachievable for nodes to keep their clocks accurate to
within 500ms. It is unclear whether this is due to Windows'
implementation of client NTP or because of terrible network
conditions in China.
So increasing max NTP offset to allow block generation from
500ms to 30s. Correspondingly increasing max peer timestamp
delta from 5s to 30s.
The block consensus algorithm will need to change in the near
future to address clock issues.
Controller batches SysTray updates into one per second.
Block generation only allowed by Controller is clock
known to be accurate. ('not sure' stops generation).
NTP MAX_STDDEV increased from 25ms to 125ms to cater
for poorly connected nodes.
Controller sends peers list over outbound peer connections,
requests peers list from inbound peer connections.
When peer handshake completes, Network & Controller only send
initial messages over outbound peer connections.
This is to fix HEIGHT_V2 messages being processed out-of-order
breaking handshaking, as indicated by log entries like:
2019-07-26 16:16:35 DEBUG Network:702 - Unexpected HEIGHT_V2 message from xx.xxx.xx.xx:pppp, expected PROOF
2019-07-26 16:16:35 DEBUG Network:840 - Handshake completed with peer xx.xxx.xx.xx:pppp
Increased connection failure backoff from 1 minute to 5 minutes,
as handshake timeout is 1 minute and then nodes would immediately reconnect.
Changed default NTP servers from asia to cn.
Controller performs NTP check on startup (and every 5 minutes)
which determines whether block generation is allowed.
System Tray tooltip updated to reflect generating status.
Plus new translations.
Improved GuiTests.
BlockGenerator fetches forging accounts first, and sleeps
if none configured, which is less work than processing peer lists.
Now uses several NTP servers to determine mean offset from
system clock to internet time.
If abs(offset) > 500ms or NTP service not running then
user is 'nagged' via system tray pop-up notification
with instructions on how to fix.
Also improved system tray translations!
SysTray pop-up menu now includes entry for launching https://time.is
so node owners can check their system clocks against internet time.
Windows installs also have additional systray menu entry which
runs ntpcfg.bat script, included in resources.
Also available as download via node-UI servlet,
e.g. http://localhost:9880/downloads/ntpcfg.bat
ntpcfg.bat reconfigures Windows Time Service with many NTP servers,
restarts the service, and also makes sure it auto-starts on boot.
Added DEBUG-level logging when rejecting nodes due to excessive
time difference (during PROOF handshake stage).
Bumped default settings values for minOutboundPeers from 10 to 20.
Bumped default settings values for maxPeers from 30 to 50.
Defer the clearing of hasThreadPending flag until about to produce a task,
inside synchronized block.
This gives a new thread a chance to produce at least once before other threads
decide to spawn new threads.
Previously there could be an excessive number of unncessary threads,
all waiting for their initial attempt to produce a task.
Reworked networking execute-produce-consume threading.
Some networking task were wrongly performed during 'produce' phase,
and some producing was happening in 'consume' phase (also corrected).
Peer connection tasks are rate-limited to 1 per second to reduce CPU thrashing.
Show P2P listen port in logs on startup.
Tests for general purpose ExecuteProduceConsume class to cover both
random task scenario and mass-ping scenario.
Instead of 3 threads per peer:
1. peer main thread
2. peer's unsolicited messages processor
3. peer pinger
We now use a Jetty-style Execute-Produce-Consume server threading model.
For 60 connected peers, we no longer have 180 threads but typically only
the usual ~6 threads.
Also in this commit:
* merging peers locking changed from lock() to tryLock()
* PROOF handshake maximum time difference increased from 2000ms to 5000ms
* Peers still handshaking after 60s are considered stuck and hence disconnected
* We now use NIO SocketChannels instead of raw sockets
Change AutoUpdate to use 'quick' backup.
For HSQLDBRepository.backup, don't perform CHECKPOINT DEFRAG while repository in use
as it never completes.
Similarly, use BACKUP DATABASE ... NOT BLOCKING.
Controller requests 'quick' repository backup every 123 minutes.
On start-up, if repository fails to load, recovery is attempted using
backup (if present).
AutoUpdate also requests 'slow' repository backup just before
calling ApplyUpdate. ('Slow' means perform "CHECKPOINT DEFRAG" first).
