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)
*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
|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.|
|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.
|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.
|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.|
|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
KSM have 12 decimals of precision. In other words, 1e12 (1_000_000_000_000, or one trillion) Plancks make up a single KSM.