32 Bit Architecture NTP Sync Hotfix

NavCoin v4.2.1 Release Notes

Hot Fix:

• The wallet will try to synchronize clock every 30 seconds on launch until it succeds instead of just checking once and exiting if it fails.
• Enforces 32-bit data type for the buffer when reading from the NTP Server socket, fixing some compatibiity issues with 32-bit systems like Raspberry Pi.
• Reduce NTP connection timeout to 5 seconds.

SHA256 Hashes

To check the validity of the hashes, visit the navcoin-sigs repository

navcoin-4.2.1-aarch64-linux-gnu.tar.gz

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navcoin-4.2.1-arm-linux-gnueabihf.tar.gz

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navcoin-4.2.1-i686-pc-linux-gnu.tar.gz

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navcoin-4.2.1-osx.dmg

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navcoin-4.2.1-osx64.tar.gz

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navcoin-4.2.1-win32-setup.exe

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navcoin-4.2.1-win32.zip

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navcoin-4.2.1-win64-setup.exe

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navcoin-4.2.1-win64.zip

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navcoin-4.2.1-x86_64-linux-gnu.tar.gz

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navcoin-4.2.1.tar.gz

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NTP Sync and Community Fund Accumulation

Introduces two new Soft Forks:

Community Fund - Accumulation of coins, signalled by version bit 7:

• Reduction of the staking rewards to 4%.
• Inclusion of an additional output in the Coinstake transaction contributing 0.25NAV to the Community Fund
• Consensus validation of the previous rule.
• Uses a separate DB on disk to store data about the Community Fund, increasing performance.

NTP Sync - Signaled by version bit number 8 of staked blocks:

• Requires mandatory clock sync against an NTP server for every node on launch.
• New consensus rule where no blocks in the past can exist, and maximal drift in the future for a block is 60 seconds.
• Peers whose clock drifts more than 30 seconds are disconnected.
• Clock change attempts are automatically readjusted.
• New log category "ntp".
• New multi-argument -ntpserver= to allow the user to manually specify servers.
• New argument -ntpminmeasures= to allow the user to specify the req. min. of measures.
• New argument -ntptimeout= to allow the user to specify how many seconds should we wait for the response of an ntp server.
• New argument -maxtimeoffset= to set the max tolerated clock drift for peers.

An additional network "devnet" is added.

• Default p2p port: 18886
• Default rpc port: 44446
• Default datadir: OS_DATADIR/devnet
• Enabled through argument -devnet=1

Core Wallet GUI Fixes:

• Fixes wrong pixel density on HiDPI screens.
• Menu option to export private key of an address and master private key.
• Accepts URI to sign messages.
  • URIs of the format navcoin:http://domain/something/?a=navcoin_address&m=some_message will make the wallet to sign "some_message" and return the produced signature as a POST request to the URL specified in the URI.
• Shows and categorizes correctly contributions to the Community Fund and payments received from it.
• Does not show Orphan Stakes on the Transaction List.
• Removes Community Fund voting popup.

Other Fixes/Notes

• Ignores Coinstake Output when calculating the Witness Merkle Root, fixing a bug related to Segregated Witness transactions.
• Bans nodes with obsolete versions.
• Removes some recurring log messages.
• Updates the package version of some dependencies, solving compatibilities issues with some operating systems.
• Bundles some dependency libraries with the binaries.
• Updates the seed nodes.
• Fixes some of the test units.
• navcoin-tx tool has been updated to use NavCoin's own transaction structure

SHA256 Hashes

To check the validity of the hashes, visit the navcoin-sigs repository

navcoin-4.2.0-aarch64-linux-gnu.tar.gz

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navcoin-4.2.0-arm-linux-gnueabihf.tar.gz

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navcoin-4.2.0-i686-pc-linux-gnu.tar.gz

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navcoin-4.2.0-x86_64-linux-gnu.tar.gz

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navcoin-4.2.0-osx64.tar.gz

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navcoin-4.2.0-osx.dmg

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navcoin-4.2.0-win32-setup.exe

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navcoin-4.2.0-win32.zip

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navcoin-4.2.0-win64-setup.exe

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navcoin-4.2.0-win64.zip

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navcoin-4.2.0.tar.gz

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NavTech & Block Version Bit Hot Fix

This is a minor update to NavCoin Core wallet including the following fixes:

NavTech GUI Send

Coins sent through a private payment using the GUI were returned to sender under certain conditions. This patch ensures the anon destination data meets the structure expected by a NavTech server.

Block version

Version bit used to signal Segregated Witness activation is now correctly set.

SHA256 Hashes

navcoin-4.1.1-aarch64-linux-gnu.tar.gz

b748309ab3c9f9cab62e5cdbf17c335c63c1edf070a7e8b67e56456c6014d289

navcoin-4.1.1-arm-linux-gnueabihf.tar.gz

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navcoin-4.1.1-i686-pc-linux-gnu.tar.gz

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navcoin-4.1.1-x86_64-linux-gnu.tar.gz

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navcoin-4.1.1-osx.dmg

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navcoin-4.1.1-osx64.tar.gz

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navcoin-4.1.1-win32-setup.exe

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navcoin-4.1.1-win32.zip

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navcoin-4.1.1-win64-setup.exe

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navcoin-4.1.1-win64.zip

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navcoin-4.1.1.tar.gz

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Community Fund Testnet & Security Updates

Community Fund Enabled on the Testnet

The community fund which we are voting to implement has been implemented to the NavCoin testnet for everyone to try. The testnet stake rewards are reduced to 4% and there is 0.25 NAV per block generated by the staker and sent to the Community Fund Smart Contract.

You can help us to test the proposal, voting and redemption smart contract features we have proposed to implement on the mainnet. We have created a new genesis block for the testnet, so if you’ve been using it previously, please re-sync once you’ve downloaded the 4.1.0 wallet.

New Majority Version Alert

We have added a feature which allows the wallet to track the version number of the other wallets on the network. If your wallet detects a majority of wallets to be on a greater version number than its own version number, it will alert you that a new update is available.

Security Updates

Aside from the early access features, the main priority for this release is to secure the network. Bittrex alerted us to some reported instability of the blockchain they were seeing and after some thorough investigation and we were able to find the cause and we have included a preventative security patch in this latest version of the wallet.

The main changes have been to make improvements to the script check methods and we have also added the nTime & strDzeel parameters to the signature hash. This security patch will prevent the recently seen network instabilities moving forward and resolve the issues Bittrex have reported. It will also make these changes compatible with NavPay which we are still on schedule to release later this month.

Making these security improvements to the script check is a change to the consensus mechanism and requires a majority consensus to be accepted on the network. We have decided the best course of action is to implement the security patch as a mandatory hard fork instead of waiting for a majority consensus to be organically achieved.

The network will reject blocks and transactions from versions older than 4.1.0 from 11 December 2017 @ 11:00am GMT.

The network will take some time to stabilize after the fork occurs, so we suggest not sending any NAV for up to 48 hours after the hard fork time. We will post a message to the community once we see the network is stable and we are starting to bring the exchanges back online for deposits and withdrawals.

To help stabilize the network, please update to the new client before the fork time and stake your coins to mint blocks.

Install Instructions

To have a smooth transition to the new version, please download 4.1.0 and install it before the hard fork time is reached. If you're using the GUI you will be prompted to allow the wallet to rebuild the database. If you've running the daemon, you will need to run it with the -reindex flag before you will be able to use the new daemon.

If you're using the NavPi there are some extra steps to get up and running with the new version.

From the control panel page, click the update button and update the UI from GitHub.
Run the updater script located at /home/stakebox/UI/libs/updater.sh or wait for the autoupdater to run if you are on version 1.0.3 or later.
When you see the notice on the homepage of your NavPi stating that a new update has been installed, click the button to reboot the device.
When your device has rebooted, go back to the control page and click the Reindex button and reindex the blockchain.

Note that in some instances, it will be unable to reindex the blockchain and the wallet will unfortunately be required to resync the blockchain which can take some time.

If you need to resync the blockchain, you can find a bootstrap to speed the process up here:

https://build.nav.community/bootstrap

Full list of updates

• New genesis block for the testnet.
• Community fund enabled on the testnet.
• New block version structure. Rejects blocks with wrong version.
• Blocks will still signal version bits even after activation.
• Nodes with obsolete protocol versions get their messages rejected instead of being banned.
• Improvements in the Script check methods.
• Reason for messages being rejected are now registered in the log file.
• Signature Hash now includes nTime and strDZeel.
• Wallet is able to track other wallet’s versions and displays a warning when a majority has updated to a new version.
• New format of stake voting. Votings can be dynamically be pushed into the network. New RPC method ‘stakervote’.
• Adds ‘donatefund’ RPC method to donate to the community fund.
• Moved many consensus related parameters to chainparams.cpp
• Fixes a bug where a transaction could have a timestamp earlier than the outputs it spent.
• Fixes a bug where the staker thread could be interrupted.
• Fixes a bug which prevents node to start syncing at boot under some circumstances.

SHA256 Hashes

navcoin-4.1.0-osx.dmg

4fe674e873fecdf20c2307ff0ce7d39e4c6a986f88b3149d80b17b8bf871a67e

navcoin-4.1.0-osx64.tar.gz

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e1abad93238d1468ea9a60751a9dfc6a1182f6ecd5ae859f25a595ec2b424216 navcoin-4.1.0-win32-setup.exe

navcoin-4.1.0-win32.zip

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navcoin-4.1.0-win64-setup.exe

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navcoin-4.1.0-win64.zip

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navcoin-4.1.0-aarch64-linux-gnu.tar.gz

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navcoin-4.1.0-arm-linux-gnueabihf.tar.gz

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navcoin-4.1.0-i686-pc-linux-gnu.tar.gz

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navcoin-4.1.0-x86_64-linux-gnu.tar.gz

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navcoin-4.1.0.tar.gz

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Nav Community Fund Vote + Hotfix

This version enables the network vote on implementing the Nav Coin Community Fund into the consensus model and fixes a bug where orphaned transactions could be selected for staking crashing the daemon.

SHA256 Hashes

navcoin-4.0.6-win64.zip

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navcoin-4.0.6-win32.zip

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navcoin-4.0.6-win64-setup.exe

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navcoin-4.0.6-win32-setup.exe

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navcoin-4.0.6-osx64.tar.gz

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navcoin-4.0.6-osx.dmg

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navcoin-4.0.6-x86_64-linux-gnu.tar.gz

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navcoin-4.0.6-i686-pc-linux-gnu.tar.gz

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navcoin-4.0.6-aarch64-linux-gnu.tar.gz

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navcoin-4.0.6-arm-linux-gnueabihf.tar.gz

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Minor Fixes to UI & Conversions

• fixes a bug which could cause crashes on some systems after longs periods of activity
• fixes a bug which could show imprecise amounts when converting between units
• improves compatibility with some 4k displays

SHA256 Hashes:

navcoin-4.0.5-aarch64-linux-gnu.tar.gz

cac65e78ca8c09b273879dbdf7ef96488e49eacaf183313dd9793358ede0816a

navcoin-4.0.5-arm-linux-gnueabihf.tar.gz:

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navcoin-4.0.5-i686-pc-linux-gnu.tar.gz:

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navcoin-4.0.5-osx64.tar.gz:

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navcoin-4.0.5-osx.dmg:

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navcoin-4.0.5.tar.gz:

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navcoin-4.0.5-win32-setup.exe:

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navcoin-4.0.5-win32.zip:

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navcoin-4.0.5-win64-setup.exe:

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navcoin-4.0.5-win64.zip:

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navcoin-4.0.5-x86_64-linux-gnu.tar.gz:

ca7e31442a01d3e440f43dca22e48cf44e2c110356c68eb2cb48b605816aef9d

NavCoin Core v4.0.4

Merge pull request #77 from NAVCoin/v4.0.4

V4.0.4

NavCoin Core v4.0.3

Merge pull request #77 from NAVCoin/v4.0.4

V4.0.4

NavCoin Core v4.0.2

voting: sets final date

NavCoin Core v4.0.1

compat: rollback commits