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gmb_burn.go
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/
gmb_burn.go
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package keeper
import (
gmd "github.com/QuadrateOrg/core/x/stable/gmb"
"github.com/QuadrateOrg/core/x/stable/types"
sdk "github.com/cosmos/cosmos-sdk/types"
)
func (k Keeper) GMB_ExecuteBurn(ctx sdk.Context, msg *types.MsgBurn, pair types.Pair) (error, sdk.Coin) {
ReserveFundAddress := k.GetReserveFundAddress(ctx)
BurningFundAddress := k.GetBurningFundAddress(ctx)
atomPrice, err := k.GetAtomPrice(ctx, pair)
if err != nil {
return err, sdk.Coin{}
}
if k.AddressEmptyCheck(ctx) {
return types.ErrBurningFundAddressEmpty, sdk.Coin{}
}
qm, ar := pair.Qm, pair.Ar
backing_ratio, err = k.CalculateBackingRatio(qm, ar, atomPrice)
if err != nil {
return err, sdk.Coin{}
}
burningFee, err := gmd.CalculateBurningFee(backing_ratio)
if err != nil {
return err, sdk.Coin{}
}
sender, err := sdk.AccAddressFromBech32(msg.Creator)
if err != nil {
return err, sdk.Coin{}
}
amountIntCoins, err := sdk.ParseCoinsNormalized(msg.AmountIn)
if err != nil {
return err, sdk.Coin{}
}
err = VerificationBurnDenomCoins(amountIntCoins, pair)
if err != nil {
return err, sdk.Coin{}
}
amountInt := amountIntCoins.AmountOf(pair.AmountOutMetadata.DenomUnits[0].Denom)
err = k.bankKeeper.SendCoinsFromAccountToModule(ctx, sender, types.ModuleName, amountIntCoins)
if err != nil {
return err, sdk.Coin{}
}
amountOutToSend := k.CalculateAmountToSend(amountInt, atomPrice, burningFee)
if amountOutToSend.IsNil() {
return types.ErrSdkIntError, sdk.Coin{}
}
pair = k.ReduceReserve(ctx, amountOutToSend, amountInt, pair)
if err != nil {
return err, sdk.Coin{}
}
amountOut := sdk.NewCoin(pair.AmountInMetadata.DenomUnits[0].Denom, amountOutToSend)
err = k.bankKeeper.SendCoinsFromAccountToModule(ctx, ReserveFundAddress, types.ModuleName, sdk.NewCoins(amountOut))
if err != nil {
return err, sdk.Coin{}
}
err = k.bankKeeper.BurnCoins(ctx, types.ModuleName, amountIntCoins)
if err != nil {
return err, sdk.Coin{}
}
if !burningFee.IsZero() {
fee := k.CalculateBurningFeeForBurningFund(amountInt, atomPrice, burningFee)
err = k.bankKeeper.SendCoinsFromAccountToModule(ctx, ReserveFundAddress, types.ModuleName, types.CreateCoins(pair.AmountInMetadata.DenomUnits[0].Denom, fee))
if err != nil {
return err, sdk.Coin{}
}
err = k.bankKeeper.SendCoinsFromModuleToAccount(ctx, types.ModuleName, BurningFundAddress, types.CreateCoins(pair.AmountInMetadata.DenomUnits[0].Denom, fee))
if err != nil {
return err, sdk.Coin{}
}
}
err = k.bankKeeper.SendCoinsFromModuleToAccount(ctx, types.ModuleName, sender, sdk.NewCoins(amountOut))
if err != nil {
return err, sdk.Coin{}
}
k.SetPair(ctx, pair)
return nil, amountOut
}