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keeper.go
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keeper.go
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package keeper
import (
"fmt"
"github.com/cometbft/cometbft/libs/log"
"cosmossdk.io/math"
"github.com/cosmos/cosmos-sdk/codec"
storetypes "github.com/cosmos/cosmos-sdk/store/types"
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/CosmosContracts/juno/v22/x/mint/types"
)
// Keeper of the mint store
type Keeper struct {
cdc codec.BinaryCodec
storeKey storetypes.StoreKey
stakingKeeper types.StakingKeeper
accountKeeper types.AccountKeeper
bankKeeper types.BankKeeper
feeCollectorName string
// the address capable of executing a MsgUpdateParams message. Typically, this
// should be the x/gov module account.
authority string
}
// NewKeeper creates a new mint Keeper instance
func NewKeeper(
cdc codec.BinaryCodec,
key storetypes.StoreKey,
sk types.StakingKeeper,
ak types.AccountKeeper,
bk types.BankKeeper,
feeCollectorName string,
authority string,
) Keeper {
// ensure mint module account is set
if addr := ak.GetModuleAddress(types.ModuleName); addr == nil {
panic(fmt.Sprintf("the x/%s module account has not been set", types.ModuleName))
}
return Keeper{
cdc: cdc,
storeKey: key,
stakingKeeper: sk,
bankKeeper: bk,
accountKeeper: ak,
feeCollectorName: feeCollectorName,
authority: authority,
}
}
// ______________________________________________________________________
// GetAuthority returns the x/mint module's authority.
func (k Keeper) GetAuthority() string {
return k.authority
}
// Logger returns a module-specific logger.
func (k Keeper) Logger(ctx sdk.Context) log.Logger {
return ctx.Logger().With("module", "x/"+types.ModuleName)
}
// get the minter
func (k Keeper) GetMinter(ctx sdk.Context) (minter types.Minter) {
store := ctx.KVStore(k.storeKey)
bz := store.Get(types.MinterKey)
if bz == nil {
panic("stored minter should not have been nil")
}
k.cdc.MustUnmarshal(bz, &minter)
return
}
// set the minter
func (k Keeper) SetMinter(ctx sdk.Context, minter types.Minter) {
store := ctx.KVStore(k.storeKey)
bz := k.cdc.MustMarshal(&minter)
store.Set(types.MinterKey, bz)
}
// ______________________________________________________________________
// SetParams sets the x/mint module parameters.
func (k Keeper) SetParams(ctx sdk.Context, p types.Params) error {
if err := p.Validate(); err != nil {
return err
}
store := ctx.KVStore(k.storeKey)
bz := k.cdc.MustMarshal(&p)
store.Set(types.ParamsKey, bz)
return nil
}
// GetParams returns the current x/mint module parameters.
func (k Keeper) GetParams(ctx sdk.Context) (p types.Params) {
store := ctx.KVStore(k.storeKey)
bz := store.Get(types.ParamsKey)
if bz == nil {
return p
}
k.cdc.MustUnmarshal(bz, &p)
return p
}
func (k Keeper) GetAccountKeeper() types.AccountKeeper {
return k.accountKeeper
}
// ______________________________________________________________________
// StakingTokenSupply implements an alias call to the underlying staking keeper's
// StakingTokenSupply to be used in BeginBlocker.
func (k Keeper) StakingTokenSupply(ctx sdk.Context) math.Int {
return k.stakingKeeper.StakingTokenSupply(ctx)
}
// TokenSupply implements an alias call to the underlying bank keeper's
// TokenSupply to be used in BeginBlocker.
func (k Keeper) TokenSupply(ctx sdk.Context, denom string) math.Int {
return k.bankKeeper.GetSupply(ctx, denom).Amount
}
// GetBalance implements an alias call to the underlying bank keeper's
// GetBalance to be used in BeginBlocker.
func (k Keeper) GetBalance(ctx sdk.Context, address sdk.AccAddress, denom string) math.Int {
return k.bankKeeper.GetBalance(ctx, address, denom).Amount
}
// BondedRatio implements an alias call to the underlying staking keeper's
// BondedRatio to be used in BeginBlocker.
func (k Keeper) BondedRatio(ctx sdk.Context) sdk.Dec {
return k.stakingKeeper.BondedRatio(ctx)
}
// MintCoins implements an alias call to the underlying supply keeper's
// MintCoins to be used in BeginBlocker.
func (k Keeper) MintCoins(ctx sdk.Context, newCoins sdk.Coins) error {
if newCoins.Empty() {
// skip as no coins need to be minted
return nil
}
return k.bankKeeper.MintCoins(ctx, types.ModuleName, newCoins)
}
func (k Keeper) ReduceTargetSupply(ctx sdk.Context, burnCoin sdk.Coin) error {
params := k.GetParams(ctx)
if burnCoin.Denom != params.MintDenom {
return fmt.Errorf("tried reducing target supply with non staking token")
}
minter := k.GetMinter(ctx)
minter.TargetSupply = minter.TargetSupply.Sub(burnCoin.Amount)
k.SetMinter(ctx, minter)
return nil
}
// AddCollectedFees implements an alias call to the underlying supply keeper's
// AddCollectedFees to be used in BeginBlocker.
func (k Keeper) AddCollectedFees(ctx sdk.Context, fees sdk.Coins) error {
return k.bankKeeper.SendCoinsFromModuleToModule(ctx, types.ModuleName, k.feeCollectorName, fees)
}