0g-chain/x/cdp/genesis.go
Kevin Davis 535094df96
Fix: Avoid panics when adding cdp collaterals via governance (#329)
* fix: remove unnecessary accumulator key

* fix: correct test comment

* fix: avoid panic when cdp collateral type added
2020-01-23 15:41:45 -05:00

83 lines
2.3 KiB
Go

package cdp
import (
"fmt"
sdk "github.com/cosmos/cosmos-sdk/types"
)
// InitGenesis sets initial genesis state for cdp module
func InitGenesis(ctx sdk.Context, k Keeper, pk PricefeedKeeper, gs GenesisState) {
if err := gs.Validate(); err != nil {
panic(fmt.Sprintf("failed to validate %s genesis state: %s", ModuleName, err))
}
// validate denoms - check that any collaterals in the params are in the pricefeed,
// pricefeed MUST call InitGenesis before cdp
collateralMap := make(map[string]int)
ap := pk.GetParams(ctx)
for _, a := range ap.Markets {
collateralMap[a.MarketID] = 1
}
for _, col := range gs.Params.CollateralParams {
_, found := collateralMap[col.MarketID]
if !found {
panic(fmt.Sprintf("%s collateral not found in pricefeed", col.Denom))
}
}
k.SetParams(ctx, gs.Params)
// set the per second fee rate for each collateral type
for _, cp := range gs.Params.CollateralParams {
for _, dp := range gs.Params.DebtParams {
k.SetTotalPrincipal(ctx, cp.Denom, dp.Denom, sdk.ZeroInt())
}
}
// add cdps
for _, cdp := range gs.CDPs {
if cdp.ID == gs.StartingCdpID {
panic(fmt.Sprintf("starting cdp id is assigned to an existing cdp: %s", cdp))
}
k.SetCDP(ctx, cdp)
k.IndexCdpByOwner(ctx, cdp)
ratio := k.CalculateCollateralToDebtRatio(ctx, cdp.Collateral, cdp.Principal.Add(cdp.AccumulatedFees))
k.IndexCdpByCollateralRatio(ctx, cdp.Collateral[0].Denom, cdp.ID, ratio)
k.IncrementTotalPrincipal(ctx, cdp.Collateral[0].Denom, cdp.Principal)
}
k.SetNextCdpID(ctx, gs.StartingCdpID)
k.SetDebtDenom(ctx, gs.DebtDenom)
k.SetGovDenom(ctx, gs.GovDenom)
for _, d := range gs.Deposits {
k.SetDeposit(ctx, d)
}
// only set the previous block time if it's different than default
if !gs.PreviousBlockTime.Equal(DefaultPreviousBlockTime) {
k.SetPreviousBlockTime(ctx, gs.PreviousBlockTime)
}
}
// ExportGenesis export genesis state for cdp module
func ExportGenesis(ctx sdk.Context, k Keeper) GenesisState {
params := k.GetParams(ctx)
cdps := k.GetAllCdps(ctx)
cdpID := k.GetNextCdpID(ctx)
previousBlockTime, found := k.GetPreviousBlockTime(ctx)
if !found {
previousBlockTime = DefaultPreviousBlockTime
}
debtDenom := k.GetDebtDenom(ctx)
return GenesisState{
Params: params,
StartingCdpID: cdpID,
CDPs: cdps,
PreviousBlockTime: previousBlockTime,
DebtDenom: debtDenom,
}
}