0g-chain/x/bep3/keeper/asset.go
2020-05-15 15:43:52 -07:00

116 lines
4.4 KiB
Go

package keeper
import (
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
"github.com/kava-labs/kava/x/bep3/types"
)
// IncrementCurrentAssetSupply increments an asset's supply by the coin
func (k Keeper) IncrementCurrentAssetSupply(ctx sdk.Context, coin sdk.Coin) error {
supply, found := k.GetAssetSupply(ctx, []byte(coin.Denom))
if !found {
return sdkerrors.Wrap(types.ErrAssetNotSupported, coin.Denom)
}
// Resulting current supply must be under asset's limit
if supply.SupplyLimit.IsLT(supply.CurrentSupply.Add(coin)) {
return sdkerrors.Wrapf(types.ErrExceedsSupplyLimit, "increase %s, asset supply %s, limit %s", coin, supply.CurrentSupply, supply.SupplyLimit)
}
supply.CurrentSupply = supply.CurrentSupply.Add(coin)
k.SetAssetSupply(ctx, supply, []byte(coin.Denom))
return nil
}
// DecrementCurrentAssetSupply decrement an asset's supply by the coin
func (k Keeper) DecrementCurrentAssetSupply(ctx sdk.Context, coin sdk.Coin) error {
supply, found := k.GetAssetSupply(ctx, []byte(coin.Denom))
if !found {
return sdkerrors.Wrap(types.ErrAssetNotSupported, coin.Denom)
}
// Resulting current supply must be greater than or equal to 0
// Use sdk.Int instead of sdk.Coin to prevent panic if true
if supply.CurrentSupply.Amount.Sub(coin.Amount).IsNegative() {
return sdkerrors.Wrapf(types.ErrInvalidCurrentSupply, "decrease %s, asset supply %s", coin, supply.CurrentSupply)
}
supply.CurrentSupply = supply.CurrentSupply.Sub(coin)
k.SetAssetSupply(ctx, supply, []byte(coin.Denom))
return nil
}
// IncrementIncomingAssetSupply increments an asset's incoming supply
func (k Keeper) IncrementIncomingAssetSupply(ctx sdk.Context, coin sdk.Coin) error {
supply, found := k.GetAssetSupply(ctx, []byte(coin.Denom))
if !found {
return sdkerrors.Wrap(types.ErrAssetNotSupported, coin.Denom)
}
// Result of (current + incoming + amount) must be under asset's limit
totalSupply := supply.CurrentSupply.Add(supply.IncomingSupply)
if supply.SupplyLimit.IsLT(totalSupply.Add(coin)) {
return sdkerrors.Wrapf(types.ErrExceedsSupplyLimit, "increase %s, asset supply %s, limit %s", coin, totalSupply, supply.SupplyLimit)
}
supply.IncomingSupply = supply.IncomingSupply.Add(coin)
k.SetAssetSupply(ctx, supply, []byte(coin.Denom))
return nil
}
// DecrementIncomingAssetSupply decrements an asset's incoming supply
func (k Keeper) DecrementIncomingAssetSupply(ctx sdk.Context, coin sdk.Coin) error {
supply, found := k.GetAssetSupply(ctx, []byte(coin.Denom))
if !found {
return sdkerrors.Wrap(types.ErrAssetNotSupported, coin.Denom)
}
// Resulting incoming supply must be greater than or equal to 0
// Use sdk.Int instead of sdk.Coin to prevent panic if true
if supply.IncomingSupply.Amount.Sub(coin.Amount).IsNegative() {
return sdkerrors.Wrapf(types.ErrInvalidIncomingSupply, "decrease %s, incoming supply %s", coin, supply.IncomingSupply)
}
supply.IncomingSupply = supply.IncomingSupply.Sub(coin)
k.SetAssetSupply(ctx, supply, []byte(coin.Denom))
return nil
}
// IncrementOutgoingAssetSupply increments an asset's outoing supply
func (k Keeper) IncrementOutgoingAssetSupply(ctx sdk.Context, coin sdk.Coin) error {
supply, found := k.GetAssetSupply(ctx, []byte(coin.Denom))
if !found {
return sdkerrors.Wrap(types.ErrAssetNotSupported, coin.Denom)
}
// Result of (outgoing + amount) must be less than current supply
if supply.CurrentSupply.IsLT(supply.OutgoingSupply.Add(coin)) {
return sdkerrors.Wrapf(types.ErrExceedsAvailableSupply, "swap amount %s, available supply %s", coin,
supply.CurrentSupply.Amount.Sub(supply.OutgoingSupply.Amount))
}
supply.OutgoingSupply = supply.OutgoingSupply.Add(coin)
k.SetAssetSupply(ctx, supply, []byte(coin.Denom))
return nil
}
// DecrementOutgoingAssetSupply decrements an asset's outoing supply
func (k Keeper) DecrementOutgoingAssetSupply(ctx sdk.Context, coin sdk.Coin) error {
supply, found := k.GetAssetSupply(ctx, []byte(coin.Denom))
if !found {
return sdkerrors.Wrap(types.ErrAssetNotSupported, coin.Denom)
}
// Resulting outgoing supply must be greater than or equal to 0
// Use sdk.Int instead of sdk.Coin to prevent panic if true
if supply.OutgoingSupply.Amount.Sub(coin.Amount).IsNegative() {
return sdkerrors.Wrapf(types.ErrInvalidOutgoingSupply, "decrease %s, outgoing supply %s", coin, supply.OutgoingSupply)
}
supply.OutgoingSupply = supply.OutgoingSupply.Sub(coin)
k.SetAssetSupply(ctx, supply, []byte(coin.Denom))
return nil
}