ICS28: Setting CCV parameters

[mpoke]

For CCV v1, starting a consumer chain requires a governance proposal to be passed on the provider chain. This proposal can be seen as a contract between the provider and consumer chains, i.e., "The provider chain agrees to provide security to the consumer chain in certain conditions".

These conditions are described by some CCV parameters, i.e.,

• UnbondingPeriod - the period that must elapsed on the consumer chain before bonded tokens can be unlocked;
• SlashingFractions - the percentages of the stake slashed for different infractions;
• JailDurations - the period a validator is jailed for different infractions;
• DistributionFraction - the percentage of rewards accumulated on the consumer chain that are transferred to the provider chain (as payment for providing security).

The first three parameters affect the state of the provider chain. The fourth parameter affects the earnings of the provider chain. The consumer chain should not be able to change them without the consent of the provider chain, i.e., a change should entail a renegotiation of the contract. Thus, these parameters should be part of the governance proposal to spawn a new consumer chain and the consumer chain should not be able to modify them through a consumer governance proposal.

[mpoke]

What other parameters that are usually modified via governance can have an impact on the provider chain?

• block time ?

@jtremback

[jtremback]

@okwme Is there a way to dump all parameters? I guess we can also just search for them in the code

[mpoke]

CCV will use the SlashingFraction and JailDuration set on the provider; the consumer will not be able to choose its own. See https://github.com/cosmos/ibc/issues/726

[mpoke]

The consumer should also use the UnbondingPeriod set on the provider. See discussion on the implementation side https://github.com/cosmos/interchain-security/issues/80

[mpoke]

Regarding the DistributionFraction, see discussion on the implementation side https://github.com/cosmos/interchain-security/issues/81