Pactus 1.13.0 (Tallinn) Released

April 4, 2026
Pactus 1.13.0 (Tallinn) Released

Overview

Pactus Blockchain Version 1.13.0 (Tallinn) 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.

Highlights

Version Tallinn introduces a major protocol upgrade, adding support for validator delegation. Validator delegation allows a Pactus validator to operate on behalf of stake owners and share block rewards with them. The full specification is described in PIP-49.

This is a protocol-level upgrade. Once activated, older versions will no longer be able to participate in block production and therefore will not receive any block rewards. We strongly encourage all users to upgrade to this version as soon as possible.

The upgrade will be automatically activated once the majority of validators adopt the new version.

This release also introduces new tabs in the Pactus GUI for Validators, Committee and Network. These features allow node operators to easily monitor their validators and the network, helping ensure smooth operation.

Pactus GUI

To learn how to connect your local GUI to a remote node, see this tutorial: Connect GUI to Remote Node

In addition, this upgrade includes performance improvements and several minor bug fixes.

Download

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.

Software Development Kits

Software Development Kits are available in JavaScript and Python:

Change log

This version includes several changes and improvements, such as:

Feat

  • grpc: update validator object to support delegation (#2117)
  • cmd: add delegation flags for bond and unbond transactions (#2106)
  • other: implement PIP-49 (#2101)
  • gtk: add network info tab (#2098)
  • gtk: add committee info tab (#2096)

Fix

  • sync: update the latest support version (#2125)
  • state: fix delegate reward on boundaries (#2120)
  • state: check subsidy transaction for delegated reward (#2119)
  • types: check decode size for validator (#2116)
  • cmd: set protocol version for localnet (#2114)
  • gtk: set percentage of protocol versions (#2113)
  • gtk: set public key for known validators (#2112)
  • wallet: ignore delegation on normal bond tx (#2111)
  • state: set subsidy for delegated reward (#2109)
  • execution: check delegation for withdraw execution (#2108)
  • execution: check delegation for unbond execution (#2107)
  • types: set delegation-owner for unbond transaction (#2105)
  • types: fix bond encoding issue (#2104)
  • wallet: set remote provider if not specified (#2097)

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