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Feat/dyn tier thresholds #699

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Aug 9, 2024
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Feat/dyn tier thresholds #699

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Update protocol-parameters.md
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20 changes: 12 additions & 8 deletions docs/learn/dapp-staking/dapp-staking-protocol.md
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Expand Up @@ -273,7 +273,7 @@ Since number of slots is dynamic, so has to be the threshold to allow for more r
It's not fair to define the same threshold for entering a tier if there are 50 slots or 500 slots since the
staked amount will be more diluted between various dApps.

The formula for adjusting tier entry threshold:
The formula for adjusting tier entry threshold with dApps slot changes:

$\Delta\%_{threshold} = (\frac{100\%}{100\% + \Delta\%_{dApps}} - 1) * 100\%$

Expand All @@ -282,16 +282,20 @@ The comparison is always done between the _baseline_ number of slots and the new

$new\_threshold = base\_threshold * (1 + \Delta\%_{threshold})$

At the moment, there are two types of tier entry thresholds:
There are now two types of tier entry thresholds:

* `Dynamic` - adjusts the threshold based on the aforementioned formula.
* `Fixed` - defines a static, fixed threshold which doesn't adapt.
* `Dynamic` - A percentage of the total issuance as staked funds that can change between periods. It includes a minimum percentage that the threshold cannot fall below. This type is used for _higher_ tiers.
* `Fixed` - A constant percentage of the total issuance as staked funds, which does not change between periods. Used for the _lowest_ tier, and defines a static value.

The `Dynamic` threshold is used for _higher_ tiers, and also defines the minimum amount to which the threshold can fall.
E.g. a threshold might define _current_ value as **1,000,000 ASTR**. Since this can be decreased if number of slots goes up,
it also defines a minimum amount the threshold can take, e.g. **500,000 ASTR**.
These percentages are calculated based on a total issuance of **8.4 billion ASTR** tokens when dApp Staking V3 was launched. As the total issuance changes (e.g. burn events), the dynamic thresholds will adjust accordingly, ensuring a fair and adaptive staking environment. However, the fixed threshold for the *lowest* tier remains constant.
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The `Fixed` threshold is used for the _lowest tier_, and defines a static value.
For example, suppose the total issuance is **8.4 billion** ASTR tokens. For **Tier 1**, the dynamic threshold percentage is set at **3.57%** (*approximately 299,880,000 ASTR*), with a minimum required percentage of **2.38%** (*approximately 199,920,000 ASTR*). If the total issuance decreases due to a burn event, the threshold adjusts accordingly. For example, if the total issuance drops to **8.0 billion** ASTR, the **Tier 1** threshold adjusts to:

$new\_threshold = 3.57\% * 8.0 billion = 285,600,000\ ASTR$

If the number of slots changes, the threshold is further adjusted based on the delta percentage formula.

*Refer to the [dApp staking parameters](/docs/learn/dapp-staking/protocol-parameters#network-values) page to find out more about the percentage values for each network.*

#### Tier Rewards

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46 changes: 23 additions & 23 deletions docs/learn/dapp-staking/protocol-parameters.md
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Expand Up @@ -65,11 +65,11 @@ E.g. `[5%, 15%, 20%, 60%]` means that `5%` of the total slots are assigned for *

### Tier Thresholds

The threshold that dApp has to satisfy, essentially the total staked amount, in order to be eligible to enter a tier.
There are two types of thresholds:
The threshold a dApp must meet, based on a percentage of the total issuance staked, to enter a tier.
There are two types of threshold percentages:

* `Fixed` - threshold has a fixed value and doesn't change
* `Dynamic` - threshold has an initial value, which changes dynamically as the number of slots change, but also has a minimum allowed value.
* `Fixed` - A fixed percentage of the total issuance as staked funds, constant and unchanging between periods.
* `Dynamic` - A percentage of the total issuance as staked funds that can change between periods, with a minimum percentage *minimum_required_percentage* that cannot be reduced below.
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### Price Aggregation Duration

Expand All @@ -81,22 +81,22 @@ Length of the circular buffer used to implement the _moving-average_ solution.

## Network Values

| Parameter name | Astar | Shiden | Shibuya |
| ------------------------------ | --------------------- | --------------------- | -------------------- |
| Era Reward Span Length | 16 | 16 | 16 |
| Reward Retention In Periods | 4 | 3 | 2 |
| Max Number Of Contracts | 500 | 500 | 500 |
| Max Unlocking Chunks | 8 | 8 | 8 |
| Minimum Locked Amount | 500 ASTR | 50 SDN | 5 SBY |
| Unlocking Period | 9 | 4 | 4 |
| Max Number Of Staked Contracts | 16 | 16 | 8 |
| Minimum Stake Amount | 500 ASTR | 50 SDN | 5 SBY |
| Number Of Tiers | 4 | 4 | 4 |
| Reward Distribution | [25%, 47%, 25%, 3%] | [25%, 47%, 25%, 3%] | [40%, 30%, 20%, 10%] |
| Slot Portions | [5%, 20%, 30%, 45%] | [5%, 20%, 30%, 45%] | [10%, 20%, 30%, 40%] |
| Tier 1 Threshold | Dynamic(300M/200M ASTR) | Dynamic(3M/2M SDN) | Dynamic(3000/2500 SBY) |
| Tier 2 Threshold | Dynamic(75M/50M ASTR) | Dynamic(750k/500k SDN)| Dynamic(2000/1500 SBY) |
| Tier 3 Threshold | Dynamic(20M/15M ASTR) | Dynamic(200k/150k SDN)| Dynamic(800/500 SBY) |
| Tier 4 Threshold | Fixed(1.5M ASTR) | Fixed(50k SDN) | Fixed(200 SBY) |
| Price Aggregation Duration | 7200 blocks | 7200 blocks | 7200 blocks |
| Circular Buffer Length | 7 | 7 | 7 |
| Parameter name | Astar | Shiden | Shibuya |
| ----------------------------------- | ---------------------- | ---------------------- | -------------------------- |
| Era Reward Span Length | 16 | 16 | 16 |
| Reward Retention In Periods | 4 | 3 | 2 |
| Max Number Of Contracts | 500 | 500 | 500 |
| Max Unlocking Chunks | 8 | 8 | 8 |
| Minimum Locked Amount | 500 ASTR | 50 SDN | 5 SBY |
| Unlocking Period | 9 | 4 | 4 |
| Max Number Of Staked Contracts | 16 | 16 | 8 |
| Minimum Stake Amount | 500 ASTR | 50 SDN | 5 SBY |
| Number Of Tiers | 4 | 4 | 4 |
| Reward Distribution | [25%, 47%, 25%, 3%] | [25%, 47%, 25%, 3%] | [40%, 30%, 20%, 10%] |
| Slot Portions | [5%, 20%, 30%, 45%] | [5%, 20%, 30%, 45%] | [10%, 20%, 30%, 40%] |
| Tier 1 Threshold (total issuance %) | Dynamic(3.57%/2.38%) | Dynamic(3.57%/2.38%) | Dynamic(0.0020%/0.0017%) |
| Tier 2 Threshold (total issuance %) | Dynamic(0.89%/0.6%) | Dynamic(0.89%/0.6%) | Dynamic(0.0013%/0.0010%) |
| Tier 3 Threshold (total issuance %) | Dynamic(0.238%/0.179%) | Dynamic(0.238%/0.179%) | Dynamic(0.00054%/0.00034%) |
| Tier 4 Threshold (total issuance %) | Fixed(0.02%) | Fixed(0.06%) | Fixed(0.00014%) |
| Price Aggregation Duration | 7200 blocks | 7200 blocks | 7200 blocks |
| Circular Buffer Length | 7 | 7 | 7 |
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