User Data

Urn - Cdp state

Urn records hold current Cdp state for a given user (address) and collateral type (Ilk)

• ink - Locked collateral (Gem)
• art - Debt on issue (Dai)

Vat.urns[ilk][user] 

Gem - Available collateral

User balances for collateral tokens added to the system via join are accounted for in the Vat as Gem according to collateral type Ilk.

Vat.gem[ilk][user]    // Free collateral (Gem)

Dai - Collateral-backed debt

Cdp debt balances are accounted for in the Vat as Dai.

Vat.dai[user]         // Dai balance for a given user (Dai)

Pie - Savings Dai

User balances for Dai which has been allocated to savings is accounted for in the Pot as Pie.

Pot.pie[user]         // Savings Dai balance for a given user 

Sin - Bad debt

Un-backed debt i.e. debt seized from liquidated Cdps is accounted for in the Vat as Sin. (In practice, the Vow is the only user with a non-zero Sin balance.)

Vat.sin[user]         // Bad debt (Sin)