Frozen Markets and Reserves

How is a reserve or market frozen?

A reserve on the Spark Protocol can be frozen by calling the setReserveFreeze function on the PoolConfigurator contract, which is deployed for each Spark market. This function is callable by addresses with the RiskAdmin or PoolAdmin role, which is owned by Maker Governance (or Guardian multisig on networks without governance bridge), and can also be granted this role.

What is a frozen reserve?

A reserve is frozen by calling one which does not allow any new supply, borrow, or rate swap (variable/stable). Repay, withdraw, liquidations, and interest accrual (stable rate rebalances).

Can a reserve or market be unfrozen?

Yes, the same process and smart contract function can be used to unfreeze as well if conditions are suitable for reserves to be reinstated for supply and borrow.

Spark Market Reserve Configurations

The table below shows which functions are callable depending on the state of the reserve.

For example, when a reserve is not frozen or paused, if the reserve is active, it is still possible to supply() assets.

Function	Active	Frozen	Paused	Borrowing Enabled	Stable Borrowing Enabled
Supply	Yes	No	No
Withdraw	Yes		No
Borrow	Yes	No	No	Yes	Depends on the mode
Repay	Yes		No
SwapRateMode	Yes	No	No		Depends on the mode
RebalanceStableBorrowRate	Yes		No
SetUseReserveAsCollateral	Yes		No
Flashloan	Yes		No
Liquidate	Yes		No
spToken Transfer			No

The role emergencyAdmin can pause a specific reserve.