Kusama Parameters
Many of these parameter values can be updated via on-chain governance. If you require absolute certainty of these parameter values, it is recommended you directly check the constants by looking at the chain state and/or storage.
Periods of common actions and attributes
NOTE: Kusama generally runs 4x as fast as Polkadot, except in the time slot duration itself. See Polkadot Parameters for more details on how Kusama's parameters differ from Polkadot's.
- Slot: 6 seconds *(generally one block per slot, although see note below)
- Epoch: 1 hour (600 slots x 6 seconds)
- Session: 1 hour (6 sessions per Era)
- Era: 6 hours (3600 slots x 6 seconds)
| Kusama | Time | Slots* |
|---|---|---|
| Slot | 6 seconds | 1 |
| Epoch | 1 hour | 600 |
| Session | 1 hour | 600 |
| Era | 6 hours | 3_600 |
*A maximum of one block per slot can be in a canonical chain. Occasionally, a slot will be without a block in the chain. Thus, the times given are estimates. See Consensus for more details.
Accounts, Identity and Crowdloans
- The Existential Deposit is
- The deposit required to set an Identity is
- The minimum contribution required to participate in a crowdloan is
Governance
| Democracy | Time | Slots | Description |
|---|---|---|---|
| Voting period | 7 days | 100_800 | How long the public can vote on a referendum. |
| Launch period | 7 days | 100_800 | How long the public can select which proposal to hold a referendum on, i.e., every week, the highest-weighted proposal will be selected to have a referendum. |
| Enactment period | 8 days | 115_200 | Time it takes for a successful referendum to be implemented on the network. |
| Council | Time | Slots | Description |
|---|---|---|---|
| Term duration | 1 day | 14_400 | The length of a council member's term until the next election round. |
| Voting period | 1 day | 14_400 | The council's voting period for motions. |
The Kusama Council consists of up to 19 members and up to 19 runners up.
| Technical committee | Time | Slots | Description |
|---|---|---|---|
| Cool-off period | 7 days | 604_800 | The time a veto from the technical committee lasts before the proposal can be submitted again. |
| Emergency voting period | 3 hours | 1_800 | The voting period after the technical committee expedites voting. |
Staking, Validating, and Nominating
A maximum of validators can be nominated by a nominator on Kusama.
| Kusama | Time | Slots | Description |
|---|---|---|---|
| Term duration | 6 hours | 3_600 | The time for which a validator is in the set after being elected. Note, this duration can be shortened in the case the a validator misbehaves. |
| Nomination period | 6 hours | 3_600 | How often a new validator set is elected. |
| Bonding duration | 7 days | 604_800 | How long until your funds will be transferrable after unbonding. Note that the bonding duration is defined in eras, not directly by slots. |
| Slash defer duration | 7 days | 604_800 | Prevents overslashing and validators "escaping" and getting their nominators slashed with no repercussions to themselves. Note that the bonding duration is defined in eras, not directly by slots. |
Treasury
| Treasury | Time | Slots | Description |
|---|---|---|---|
| Periods between spends | 6 days | 86_400 | When the treasury can spend again after spending previously. |
Burn percentage is currently 0.20%, though instead of being burned this amount is temporarily
redirected into the Society's treasury to
fund growth.
Precision
KSM have 12 decimals of precision. In other words, 1e12 (1_000_000_000_000, or one trillion) Plancks make up a single KSM.