Pactus 1.1.5 (Cape Town) Released


Pactus Blockchain Version 1.1.5 (Cape Town) is now available for download. This release includes the following applications:

  • Pactus GUI: The graphical user interface (GUI) for the Pactus node that is suitable for both beginners and experienced users.

  • Pactus Daemon: The command-line interface (CLI) for the Pactus node that is suitable for experienced users.

  • Pactus Shell: The command-line tool that allows users to interact with a Pactus node.

  • Pactus Wallet: The wallet software that allows users to manage their wallet and send transactions without the need to sync the entire blockchain.


Rate limit

This version applies a rate limit to the messages in the general topics including blocks and transactions. This will help nodes to manage the network traffic in times of network congestion or spam attacks.

Dynamic fee

To prevent attackers from sending spam transactions, a dynamic fee model is introduced in this patch. Each node can define a minimum fee that is defaulted to 0.000001 PAC. However, if the transaction pool becomes full, the transaction fee can increase up to 1 PAC.

To ensure network stability and security, it is recommended that all validators upgrade to this version as soon as they can.


To start using Pactus blockchain, download the latest version from the download page and join the Mainnet.

How to Upgrade

If you are running an older version, close it first. Then uninstall the previous version and install the newer version. If you are using the archived version, simply replace it with the new version .

Change log

This version includes several changes and improvements, such as:


  • add dynamic fee (#1290)
  • network: define config for rate limit threshold (#1284)
  • network: ratelimit gossip for prevent spamming (#1283)


  • change CalculateFee to be backward compatible (#1291)
  • proposal basic checks deferred to consensus (#1288)
  • rejected spam tx for same from and to (#1287)

You can find the full list of changes on Github, as well as the source code