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deposit.go
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deposit.go
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package keeper
import (
"errors"
errorsmod "cosmossdk.io/errors"
sdkmath "cosmossdk.io/math"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
"github.com/kava-labs/kava/x/hard/types"
)
// Deposit deposit
func (k Keeper) Deposit(ctx sdk.Context, depositor sdk.AccAddress, coins sdk.Coins) error {
// Set any new denoms' global supply index to 1.0
for _, coin := range coins {
_, foundInterestFactor := k.GetSupplyInterestFactor(ctx, coin.Denom)
if !foundInterestFactor {
_, foundMm := k.GetMoneyMarket(ctx, coin.Denom)
if foundMm {
k.SetSupplyInterestFactor(ctx, coin.Denom, sdk.OneDec())
}
}
}
// Call incentive hook
existingDeposit, hasExistingDeposit := k.GetDeposit(ctx, depositor)
if hasExistingDeposit {
k.BeforeDepositModified(ctx, existingDeposit)
}
// Sync any outstanding interest
k.SyncSupplyInterest(ctx, depositor)
err := k.ValidateDeposit(ctx, coins)
if err != nil {
return err
}
err = k.bankKeeper.SendCoinsFromAccountToModule(ctx, depositor, types.ModuleAccountName, coins)
if err != nil {
if errors.Is(err, sdkerrors.ErrInsufficientFunds) {
acc := k.accountKeeper.GetAccount(ctx, depositor)
accCoins := k.bankKeeper.SpendableCoins(ctx, acc.GetAddress())
for _, coin := range coins {
_, isNegative := accCoins.SafeSub(coin)
if isNegative {
return errorsmod.Wrapf(types.ErrBorrowExceedsAvailableBalance,
"insufficient funds: the requested deposit amount of %s exceeds the total available account funds of %s%s",
coin, accCoins.AmountOf(coin.Denom), coin.Denom,
)
}
}
}
}
if err != nil {
return err
}
interestFactors := types.SupplyInterestFactors{}
currDeposit, foundDeposit := k.GetDeposit(ctx, depositor)
if foundDeposit {
interestFactors = currDeposit.Index
}
for _, coin := range coins {
interestFactorValue, foundValue := k.GetSupplyInterestFactor(ctx, coin.Denom)
if foundValue {
interestFactors = interestFactors.SetInterestFactor(coin.Denom, interestFactorValue)
}
}
// Calculate new deposit amount
var amount sdk.Coins
if foundDeposit {
amount = currDeposit.Amount.Add(coins...)
} else {
amount = coins
}
// Update the depositer's amount and supply interest factors in the store
deposit := types.NewDeposit(depositor, amount, interestFactors)
if deposit.Amount.Empty() {
k.DeleteDeposit(ctx, deposit)
} else {
k.SetDeposit(ctx, deposit)
}
k.IncrementSuppliedCoins(ctx, coins)
if !foundDeposit { // User's first deposit
k.AfterDepositCreated(ctx, deposit)
} else {
k.AfterDepositModified(ctx, deposit)
}
ctx.EventManager().EmitEvent(
sdk.NewEvent(
types.EventTypeHardDeposit,
sdk.NewAttribute(sdk.AttributeKeyAmount, coins.String()),
sdk.NewAttribute(types.AttributeKeyDepositor, deposit.Depositor.String()),
),
)
return nil
}
// ValidateDeposit validates a deposit
func (k Keeper) ValidateDeposit(ctx sdk.Context, coins sdk.Coins) error {
for _, depCoin := range coins {
_, foundMm := k.GetMoneyMarket(ctx, depCoin.Denom)
if !foundMm {
return errorsmod.Wrapf(types.ErrInvalidDepositDenom, "money market denom %s not found", depCoin.Denom)
}
}
return nil
}
// GetTotalDeposited returns the total amount deposited for the input deposit type and deposit denom
func (k Keeper) GetTotalDeposited(ctx sdk.Context, depositDenom string) (total sdkmath.Int) {
macc := k.accountKeeper.GetModuleAccount(ctx, types.ModuleAccountName)
return k.bankKeeper.GetBalance(ctx, macc.GetAddress(), depositDenom).Amount
}
// IncrementSuppliedCoins increments the total amount of supplied coins by the newCoins parameter
func (k Keeper) IncrementSuppliedCoins(ctx sdk.Context, newCoins sdk.Coins) {
suppliedCoins, found := k.GetSuppliedCoins(ctx)
if !found {
if !newCoins.Empty() {
k.SetSuppliedCoins(ctx, newCoins)
}
} else {
k.SetSuppliedCoins(ctx, suppliedCoins.Add(newCoins...))
}
}
// DecrementSuppliedCoins decrements the total amount of supplied coins by the coins parameter
func (k Keeper) DecrementSuppliedCoins(ctx sdk.Context, coins sdk.Coins) error {
suppliedCoins, found := k.GetSuppliedCoins(ctx)
if !found {
return errorsmod.Wrapf(types.ErrSuppliedCoinsNotFound, "cannot withdraw if no coins are deposited")
}
updatedSuppliedCoins, isNegative := suppliedCoins.SafeSub(coins...)
if isNegative {
coinsToSubtract := sdk.NewCoins()
for _, coin := range coins {
if suppliedCoins.AmountOf(coin.Denom).LT(coin.Amount) {
if suppliedCoins.AmountOf(coin.Denom).GT(sdk.ZeroInt()) {
coinsToSubtract = coinsToSubtract.Add(sdk.NewCoin(coin.Denom, suppliedCoins.AmountOf(coin.Denom)))
}
} else {
coinsToSubtract = coinsToSubtract.Add(coin)
}
}
updatedSuppliedCoins = suppliedCoins.Sub(coinsToSubtract...)
}
k.SetSuppliedCoins(ctx, updatedSuppliedCoins)
return nil
}
// GetSyncedDeposit returns a deposit object containing current balances and indexes
func (k Keeper) GetSyncedDeposit(ctx sdk.Context, depositor sdk.AccAddress) (types.Deposit, bool) {
deposit, found := k.GetDeposit(ctx, depositor)
if !found {
return types.Deposit{}, false
}
return k.loadSyncedDeposit(ctx, deposit), true
}
// loadSyncedDeposit calculates a user's synced deposit, but does not update state
func (k Keeper) loadSyncedDeposit(ctx sdk.Context, deposit types.Deposit) types.Deposit {
totalNewInterest := sdk.Coins{}
newSupplyIndexes := types.SupplyInterestFactors{}
for _, coin := range deposit.Amount {
interestFactorValue, foundInterestFactorValue := k.GetSupplyInterestFactor(ctx, coin.Denom)
if foundInterestFactorValue {
// Locate the interest factor by coin denom in the user's list of interest factors
foundAtIndex := -1
for i := range deposit.Index {
if deposit.Index[i].Denom == coin.Denom {
foundAtIndex = i
break
}
}
// Calculate interest that will be paid to user for this asset
if foundAtIndex != -1 {
storedAmount := sdk.NewDecFromInt(deposit.Amount.AmountOf(coin.Denom))
userLastInterestFactor := deposit.Index[foundAtIndex].Value
coinInterest := (storedAmount.Quo(userLastInterestFactor).Mul(interestFactorValue)).Sub(storedAmount)
totalNewInterest = totalNewInterest.Add(sdk.NewCoin(coin.Denom, coinInterest.TruncateInt()))
}
}
supplyIndex := types.NewSupplyInterestFactor(coin.Denom, interestFactorValue)
newSupplyIndexes = append(newSupplyIndexes, supplyIndex)
}
return types.NewDeposit(deposit.Depositor, deposit.Amount.Add(totalNewInterest...), newSupplyIndexes)
}