Aug 21, 2026
CARDZ.GAME’s new Card Upgrader is live. Choose cards from your Backpack, select a target and review the success chance before you start. After the upgrade, you can check how the system calculated your result.
Players should have access to the calculation behind a result, along with the records needed to repeat it. We have published the upgrade algorithm and a guide to checking your own rounds.
Card Upgrader uses HMAC-SHA256 to calculate a number called the Roll from a Server seed, Client seed and Nonce. The round succeeds when the Roll falls inside its recorded Winning range.
You can repeat that calculation on JACKZ.AI. Copy the data from a completed upgrade, enter it in the verifier and compare the recalculated Roll and outcome with your CARDZ.GAME record. The calculation runs in your browser.
For a full check, save the Server seed hash before the round. After seed rotation reveals the old Server seed, you can check that it matches the hash you saved, then recalculate the result. Successful and failed upgrades can both be checked.
The step-by-step verification guide shows the fields to copy and how to read the result. You can follow it without writing code.
CARDZ.GAME’s on-chain infrastructure uses Sui. It provides ownership records for the real trading cards held on the platform, giving collectors a public record they can trace.
We use these records alongside the published upgrade calculation. The verification guide explains how to check an individual round from its seeds, Roll and Winning range.
You can also look up CARDZ.GAME on DeFiLlama. Its dashboard reports card pack sales, buybacks and protocol revenue, with a published methodology explaining how the figures are calculated.
Players can inspect a completed upgrade. Collectors and anyone following CARDZ.GAME can also review the platform’s reported activity over time. We want these checks to be a routine part of using CARDZ.GAME.
Card Upgrader is available now. Review the cards and success chance on the upgrade page, and keep your round’s record if you want to verify it afterwards.
