Dear community,

This referendum seeks to adjust the invulnerable collator set of Polkadot Coretime.

The main objective is to make the invulnerable set better aligned with the risk profile and importance of the respective System Chain, while also keeping the assignment process efficient and consistent across the programme.

The curators also considered the historical assignment of slots across the System Chains. Where possible, the revised assignments favour operators with longer tenure and a demonstrated record of providing reliable service. At the same time, the changes are intended to help even the field for operators who have shown capability and interest in supporting additional System Chains.

Finally, this referendum adjusts the number of permissionless collator slots to ensure that permissionless collators do not outweigh the intended invulnerable set.

To support this, the curators applied a tiering model where each System Chain is categorised from Tier 1 to Tier 3, based on its perceived importance and risk profile. Under this model, Polkadot Coretime is categorised as a Tier-2 chain, with 4 funded community invulnerable collators.

For Polkadot Coretime, the proposed configuration is:

• Tier: Tier 2
• Community-funded invulnerable collators: 4
• Permissionless collator slots: 2

This referendum performs the following changes.

Collators being added

• Chris-Staking — 14fbxKv81FF9wxyidiD4jrYokbF428KJBrB5DsgipQp6Yrmm
• MegaTron / Eric — 13oz8fEwz7TmpoAnozbHAfCG2L5uWdVmDq7cjY5Aw2CBW5Cj
• HYPERSPEED — 15cu9qomrRvnqkvnSMhPPkBp9359QDbGBy1bVo3tseozxhj

Collators being removed

• MathCrypto — 112FKz5UNxjXqe3Wowe73a8FHnR5B4R9qi2pbMaXJczGNJsx
• Previous invulnerable — 1k4vuCxwbNcHfsNdQ3MgTGixwvrT7wbLc2XiZj68Gru6bLM
• openbitlab — 12iho9gjSMvF9smJjnihmn9j9Qqr3S1LFD97e8Lkcw4R6Yeb
• Stakeworld — 13Jpq4n3PXXaSAbJTMmFD78mXAzs8PzgUUQd5ve8saw7HQS5

Collators retained

The following community invulnerable is already in place and remains part of the final Coretime set:

• STKD — 173Wc3mSdXa9ja9nv7C1z6GQHEBK4HZ9U4NGhHnvmTfJaJb

Final community invulnerable set

• STKD — 173Wc3mSdXa9ja9nv7C1z6GQHEBK4HZ9U4NGhHnvmTfJaJb
• Chris-Staking — 14fbxKv81FF9wxyidiD4jrYokbF428KJBrB5DsgipQp6Yrmm
• MegaTron / Eric — 13oz8fEwz7TmpoAnozbHAfCG2L5uWdVmDq7cjY5Aw2CBW5Cj
• HYPERSPEED — 15cu9qomrRvnqkvnSMhPPkBp9359QDbGBy1bVo3tseozxhj

Best Regards,
Will | Paradox | ParaNodes.io