Critical Update

Vitae version 4.4.0 release contains urgent fixes to prevent a potential exploit that allows a malicious actor to amplify their staking weight and also spam invalid blocks to nodes. This release also contains other fixes and improvements. Please see release notes for a full overview.

Change List:

• Fix a runtime issue when run with option -debug
• [CRITICAL] Fix block spam exploit issue.
  • More information may be found here: https://medium.com/@dsl_uiuc/fake-stake-attacks-on-chain-based-proof-of-stake-cryptocurrencies-b8b05723f806
• Fix rare case that causes infinite loop in the staking thread.
• Fix multisend UI display error in QT
• Remove no longer needed debug messages
• Fix masternode protocol version check.
  • Add and fix masternode SPORK control variable. Implement SPORK_21
  • Fix issue with compatibility of masternodes between different protocol versions. This eases the impact of updates to the network by not knocking all outdated masternodes offline.
• Fix edge case issue with autocombinerewards getting stuck..
• Implement BIP65 Support - Check Lock Time Verify (CLTV).
  • Additional information: https://github.com/bitcoin/bips/blob/master/bip-0065.mediawiki
  • Set OP_CHECKLOCKTIMEVERIFY (BIP65) activation threshold to 95% consensus. Requires 95% of the network to be updated before feature enables.
  • Adjust softfork consensus threshold to about 7 days
• Add additional info to getblockchaininfo rpc command to show softforks
• Adjust seed peers and include additional nodes.
• Fix masternode count issue
• Implement getmasternodestatus rpc command
• Update copyright year.
• Update version tags for release