The next hard fork is scheduled.

Friday 26th of January 2018 at block 69500 a hard fork is scheduled. This hard fork will enable a new difficulty algorithm so Iridium will be protected from differents possible attacks.

You can download the latest wallet version now, you will be ready for Friday. After this hard fork, current wallet version will stop working. No worry, your coins are kept safe in the blockchain but to access them, you have to run the latest version.

Installation instructions

  • 3) Install your newly fresh downloaded release :
    • MacOs : Double-clic on the Iridium_Wallet.MacOs.2.1.3.dmg, copy the Iridium_Wallet.2.1.3 to your application folder.
    • Linux : Decompress the Iridium_Wallet.Linux.2.1.3.tar.bz2 file.
    • Windows : Decompress the Iridium Wallet 2.1.3 Windows  installer.zip, run the installer, read instructions.
  • 4) Launch your new wallet :
    • MacOs : Double-clic on Iridium_Wallet.2.1.3
    • Linux :  Double clic on the Iridium_Wallet-x86_64.AppImage
    • Windows : Double clic on the Iridium Wallet shortcut.
      If you receive any error related to Microsoft Visual C++ Redistributable Package, install the MS Visual C++ runtime,  the installer is in the Iridium installation folder : C:\Program Files (x86)\Iridium Wallet\vcredist_x64.exe

You can verify that you are running the expected version in “About Iridium menu”, you should read Iridium Version 2.1.3-“something”. That’s it, you’re ready

About the new difficulty algorithm

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LW-WMA (Linearly Weighted, Weighted Harmonic Mean)

link of Zawy original algorithm : https://github.com/zawy12/difficulty-algorithms/issues/3
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– No delay of reaction.
– It is weighted by the latests found blocks in decending order (most recent weight more than the previous, etc…)
– Window size of 60 blocks, so this algorithm has to take care that a bloc is found every 175 seconds (Iridium specification) on a moving window of the latests 60 blocks.

Briefly,  if an attack occurs, the difficulty will go up just after the found bloc aiming always this 175 secondes target. After this, the difficulty will go down at the same speed to the same goal.