0g-chain/x/earn/keeper/vault.go
Derrick Lee 88d4868316
Implement Hard strategy for Earn vaults (#1278)
* Simplify strategies to lend and savings

* Add hard and savings keepers

* Add ctx to strategy interface, fill in lend strategy

* Rename lend strategy to hard

* Fix hard deposit query, fix withdraw bank send

* Fix misleading borrow instead of withdraw for hard

* Remove liquidateall strategy method

* Withdraw tests

* Add hard gs to testutil suite

* Update withdraw tests with working hard strategy, clean strategy interface methods

* Check allowed denom for strategy

* Update GetVaultTotalValue doc note

* Update error wrap message for unsupported denom

* Remove unnecessary viewvault keeper

* Withdraw amount from account value, not supplied value

* Test value > supplied withdraw

* Use dec when dividing for withdrawAmountPercent

* Use the correct store prefix for vault shares

* Update swap references to earn

* Simplify vault shares, use a single share for all coins per address
2022-07-28 09:39:57 -07:00

194 lines
5.8 KiB
Go

package keeper
import (
"github.com/cosmos/cosmos-sdk/store/prefix"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/kava-labs/kava/x/earn/types"
)
// GetVaultTotalSupplied returns the total balance supplied to the vault. This
// may not necessarily be the current value of the vault, as it is the sum
// of the supplied denom and the value may be higher due to accumulated APYs.
func (k *Keeper) GetVaultTotalSupplied(
ctx sdk.Context,
denom string,
) (sdk.Coin, error) {
vault, found := k.GetVaultRecord(ctx, denom)
if !found {
return sdk.Coin{}, types.ErrVaultRecordNotFound
}
return vault.TotalSupply, nil
}
// GetTotalValue returns the total **value** of all coins in this vault,
// i.e. the realizable total value denominated by GetDenom() if the vault
// were to liquidate its entire strategies.
//
// **Note:** This does not include the tokens held in bank by the module
// account. If it were to be included, also note that the module account is
// unblocked and can receive funds from bank sends.
func (k *Keeper) GetVaultTotalValue(
ctx sdk.Context,
denom string,
) (sdk.Coin, error) {
enabledVault, found := k.GetAllowedVault(ctx, denom)
if !found {
return sdk.Coin{}, types.ErrVaultRecordNotFound
}
strategy, err := k.GetStrategy(enabledVault.VaultStrategy)
if err != nil {
return sdk.Coin{}, types.ErrInvalidVaultStrategy
}
return strategy.GetEstimatedTotalAssets(ctx, enabledVault.Denom)
}
// GetVaultAccountSupplied returns the supplied amount for a single address
// within a vault.
func (k *Keeper) GetVaultAccountSupplied(
ctx sdk.Context,
acc sdk.AccAddress,
) (sdk.Coins, error) {
vaultShareRecord, found := k.GetVaultShareRecord(ctx, acc)
if !found {
return sdk.Coins{}, types.ErrVaultShareRecordNotFound
}
return vaultShareRecord.AmountSupplied, nil
}
// GetVaultAccountValue returns the value of a single address within a vault
// if the account were to withdraw their entire balance.
func (k *Keeper) GetVaultAccountValue(
ctx sdk.Context,
denom string,
acc sdk.AccAddress,
) (sdk.Coin, error) {
totalSupplied, err := k.GetVaultTotalSupplied(ctx, denom)
if err != nil {
return sdk.Coin{}, err
}
accSupplied, err := k.GetVaultAccountSupplied(ctx, acc)
if err != nil {
return sdk.Coin{}, err
}
vaultTotalValue, err := k.GetVaultTotalValue(ctx, denom)
if err != nil {
return sdk.Coin{}, err
}
// Percent of vault account ownership = accountSupply / totalSupply
// Value of vault account ownership = percentOwned * totalValue
vaultShare := accSupplied.AmountOf(denom).ToDec().Quo(totalSupplied.Amount.ToDec())
shareValueDec := vaultTotalValue.Amount.ToDec().Mul(vaultShare)
return sdk.NewCoin(denom, shareValueDec.TruncateInt()), nil
}
// ----------------------------------------------------------------------------
// VaultRecord -- vault total supplies
// GetVaultRecord returns the vault record for a given denom.
func (k *Keeper) GetVaultRecord(
ctx sdk.Context,
vaultDenom string,
) (types.VaultRecord, bool) {
store := prefix.NewStore(ctx.KVStore(k.key), types.VaultRecordKeyPrefix)
bz := store.Get(types.VaultKey(vaultDenom))
if bz == nil {
return types.VaultRecord{}, false
}
var record types.VaultRecord
k.cdc.MustUnmarshal(bz, &record)
return record, true
}
// UpdateVaultRecord updates the vault record in state for a given denom. This
// deletes it if the supply is zero and updates the state if supply is non-zero.
func (k *Keeper) UpdateVaultRecord(
ctx sdk.Context,
vaultRecord types.VaultRecord,
) {
if vaultRecord.TotalSupply.IsZero() {
k.DeleteVaultRecord(ctx, vaultRecord.Denom)
} else {
k.SetVaultRecord(ctx, vaultRecord)
}
}
// DeleteVaultRecord deletes the vault record for a given denom.
func (k *Keeper) DeleteVaultRecord(ctx sdk.Context, vaultDenom string) {
store := prefix.NewStore(ctx.KVStore(k.key), types.VaultRecordKeyPrefix)
store.Delete(types.VaultKey(vaultDenom))
}
// SetVaultRecord sets the vault record for a given denom.
func (k *Keeper) SetVaultRecord(ctx sdk.Context, record types.VaultRecord) {
store := prefix.NewStore(ctx.KVStore(k.key), types.VaultRecordKeyPrefix)
bz := k.cdc.MustMarshal(&record)
store.Set(types.VaultKey(record.Denom), bz)
}
// ----------------------------------------------------------------------------
// VaultShare -- user shares per vault
// GetVaultShareRecord returns the vault share record for a given denom and
// account.
func (k *Keeper) GetVaultShareRecord(
ctx sdk.Context,
acc sdk.AccAddress,
) (types.VaultShareRecord, bool) {
store := prefix.NewStore(ctx.KVStore(k.key), types.VaultShareRecordKeyPrefix)
bz := store.Get(types.DepositorVaultSharesKey(acc))
if bz == nil {
return types.VaultShareRecord{}, false
}
var record types.VaultShareRecord
k.cdc.MustUnmarshal(bz, &record)
return record, true
}
// UpdateVaultShareRecord updates the vault share record in state for a given
// denom and account. This deletes it if the supply is zero and updates the
// state if supply is non-zero.
func (k *Keeper) UpdateVaultShareRecord(
ctx sdk.Context,
record types.VaultShareRecord,
) {
if record.AmountSupplied.IsZero() {
k.DeleteVaultShareRecord(ctx, record.Depositor)
} else {
k.SetVaultShareRecord(ctx, record)
}
}
// DeleteVaultShareRecord deletes the vault share record for a given denom and
// account.
func (k *Keeper) DeleteVaultShareRecord(
ctx sdk.Context,
acc sdk.AccAddress,
) {
store := prefix.NewStore(ctx.KVStore(k.key), types.VaultShareRecordKeyPrefix)
store.Delete(types.DepositorVaultSharesKey(acc))
}
// SetVaultShareRecord sets the vault share record for a given denom and account.
func (k *Keeper) SetVaultShareRecord(
ctx sdk.Context,
record types.VaultShareRecord,
) {
store := prefix.NewStore(ctx.KVStore(k.key), types.VaultShareRecordKeyPrefix)
bz := k.cdc.MustMarshal(&record)
store.Set(types.DepositorVaultSharesKey(record.Depositor), bz)
}