Add Hybrid Inflation to Shiden

[PierreOssun]

Pull Request Summary

• Add Hybrid Inflation to Shiden + migration
• Removed Migration from Shibua

Updated Reward Model

Current blockReward: 2,664 SDN

collatorReward = 0,0689 SDN (100x less than Astar)
treasuryReward = 0,1076 SDN (100x less than Astar)

Stakers and dApp reward should be the same on absolute value:

dAppRewards = 15.00% * 2,664 = 0,3996 SDN
baseStakerPercent = 20.00% * 2,664 = 0,5328 SDN
adjustablePercent = 45.00% * 2,664 = 1,1988 SDN

So new max reward (sum of all) = 2,3077 SDN

New percentages (based on this new block reward const):

{
  // 4.662_651
  treasuryPercent: 4.669%
  // 23.087_923
  baseStakerPercent: 23.09%
  // 17.315_942
  dappsPercent: 17.32%
  // 2.985_656
  collatorsPercent: 2.99%
  // 51.947_830
  adjustablePercent: 51.95%
  // unchanged
  idealDappsStakingTvl: 60.00%
}

Check list

• added migration for Shiden
• removed (already applied) migration for Shibuya

[Dinonard]

The overall code is good!

However, I believe the approach to Shiden has to be different than to Shibuya.
There it was fine to set parameters calculated way before for Astar, since it's not like anyone cares about Shibuya.

But for Shiden & Astar we need to be more precise.
The new inflation model will have 7% yearly inflation, and 3.2% of that will go towards collators, and 5% towards the treasury.

So for both Shiden & Astar, when PR is being prepared:

inflation = total_issuance * 0.07;
collator_reward_per_block = inflation * 0.032 / (7200 * 365)
treasury_reward_per_block = inflation * 0.05 / (7200 * 365)

According to this, collators should get around 0,071244 SDN per block.

[PierreOssun]

71244

Based on today issuance 83596484670898374984051349 the 7% inflation is 5851753926962886248883594 calc here

collator_reward_per_block = inflation * 0.032 / (7200 * 365) = 0.0712542335 calc here
treasury_reward_per_block = inflation * 0.05 / (7200 * 365) = 0.1113347398 calc here

Stakers and dApp reward should be the same on absolute value:

dAppRewards = 15.00% * 2,664 = 0,3996 SDN
baseStakerPercent = 20.00% * 2,664 = 0,5328 SDN
adjustablePercent = 45.00% * 2,664 = 1,1988 SDN

So new max reward (sum of all) = 2.313789 SDN calc here

New percentages (based on this new block reward const):

{
  // 0.048117931
  treasuryPercent: 4.81%
  // 0.230271645
  baseStakerPercent: 23.03%
  // 0.172703734
  dappsPercent: 17.27%
  // 0.030795475
  collatorsPercent: 3.08%
  // 0.518111202
  adjustablePercent: 51.81%
  // unchanged
  idealDappsStakingTvl: 60.00%
}

[Dinonard]

@PierreOssun the numbers look good to me! 👍

[github-actions]

Package	Line Rate	Branch Rate	Health
chain-extensions/types/xvm/src	0%	0%	❌
chain-extensions/types/unified-accounts/src	0%	0%	❌
precompiles/utils/src	55%	0%	➖
pallets/block-rewards-hybrid/src	87%	0%	✔
chain-extensions/unified-accounts/src	0%	0%	❌
chain-extensions/dapps-staking/src	0%	0%	❌
pallets/dynamic-evm-base-fee/src	81%	0%	✔
pallets/dapps-staking/src	81%	0%	✔
pallets/unified-accounts/src	84%	0%	✔
primitives/src	65%	0%	➖
primitives/src/xcm	66%	0%	➖
chain-extensions/types/assets/src	0%	0%	❌
pallets/xvm/src	40%	0%	❌
precompiles/xvm/src	75%	0%	➖
chain-extensions/xvm/src	0%	0%	❌
precompiles/utils/src/testing	38%	0%	❌
pallets/block-reward/src	85%	0%	✔
pallets/dapps-staking/src/pallet	85%	0%	✔
pallets/xc-asset-config/src	53%	0%	➖
precompiles/xcm/src	75%	0%	➖
pallets/contracts-migration/src	0%	0%	❌
pallets/ethereum-checked/src	48%	0%	❌
pallets/collator-selection/src	69%	0%	➖
chain-extensions/pallet-assets/src	0%	0%	❌
precompiles/dapps-staking/src	93%	0%	✔
precompiles/sr25519/src	79%	0%	➖
precompiles/assets-erc20/src	77%	0%	➖
precompiles/substrate-ecdsa/src	78%	0%	➖
precompiles/utils/macro/src	0%	0%	❌
chain-extensions/types/dapps-staking/src	0%	0%	❌
Summary	57% (2278 / 4017)	0% (0 / 0)	➖

Minimum allowed line rate is 50%