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pool.go
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pool.go
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package keeper
import (
"fmt"
sdk "github.com/cosmos/cosmos-sdk/types"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
gogotypes "github.com/gogo/protobuf/types"
authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
"github.com/c-osmosis/osmosis/x/gamm/types"
)
func (k Keeper) MarshalPool(pool types.PoolI) ([]byte, error) {
return k.cdc.MarshalInterface(pool)
}
func (k Keeper) UnmarshalPool(bz []byte) (types.PoolI, error) {
var acc types.PoolI
return acc, k.cdc.UnmarshalInterface(bz, &acc)
}
func (k Keeper) GetPool(ctx sdk.Context, poolId uint64) (types.PoolI, error) {
store := ctx.KVStore(k.storeKey)
poolKey := types.GetKeyPrefixPools(poolId)
if !store.Has(poolKey) {
return nil, fmt.Errorf("pool with ID %d does not exist", poolId)
}
bz := store.Get(poolKey)
pool, err := k.UnmarshalPool(bz)
if err != nil {
return nil, err
}
pool.PokeTokenWeights(ctx.BlockTime())
return pool, nil
}
func (k Keeper) SetPool(ctx sdk.Context, pool types.PoolI) error {
bz, err := k.MarshalPool(pool)
if err != nil {
return err
}
store := ctx.KVStore(k.storeKey)
poolKey := types.GetKeyPrefixPools(pool.GetId())
store.Set(poolKey, bz)
return nil
}
// newPool is an internal function that creates a new Pool object with the provided
// parameters, initial assets, and future governor.
func (k Keeper) newPool(ctx sdk.Context, poolParams types.PoolParams, assets []types.PoolAsset, futureGovernor string) (types.PoolI, error) {
poolId := k.getNextPoolNumber(ctx)
pool, err := types.NewPool(poolId, poolParams, assets, futureGovernor, ctx.BlockTime())
if err != nil {
return nil, err
}
acc := k.accountKeeper.GetAccount(ctx, pool.GetAddress())
if acc != nil {
return nil, sdkerrors.Wrapf(types.ErrPoolAlreadyExist, "pool %d already exist", poolId)
}
err = k.SetPool(ctx, pool)
if err != nil {
return nil, err
}
// Create and save corresponding module account to the account keeper
acc = k.accountKeeper.NewAccount(ctx, authtypes.NewModuleAccount(
authtypes.NewBaseAccountWithAddress(
pool.GetAddress(),
),
pool.GetAddress().String(),
))
k.accountKeeper.SetAccount(ctx, acc)
return pool, nil
}
// getNextPoolNumber returns the next pool number
func (k Keeper) getNextPoolNumber(ctx sdk.Context) uint64 {
var poolNumber uint64
store := ctx.KVStore(k.storeKey)
bz := store.Get(types.KeyNextGlobalPoolNumber)
if bz == nil {
// initialize the pool id numbers
poolNumber = 1
} else {
val := gogotypes.UInt64Value{}
err := k.cdc.UnmarshalBinaryBare(bz, &val)
if err != nil {
panic(err)
}
poolNumber = val.GetValue()
}
bz = k.cdc.MustMarshalBinaryBare(&gogotypes.UInt64Value{Value: poolNumber + 1})
store.Set(types.KeyNextGlobalPoolNumber, bz)
return poolNumber
}
func (k Keeper) getPoolAndInOutAssets(
ctx sdk.Context, poolId uint64,
tokenInDenom string,
tokenOutDenom string) (
pool types.PoolI,
inAsset types.PoolAsset,
outAsset types.PoolAsset,
err error,
) {
pool, err = k.GetPool(ctx, poolId)
if err != nil {
return
}
inAsset, err = pool.GetPoolAsset(tokenInDenom)
if err != nil {
return
}
outAsset, err = pool.GetPoolAsset(tokenOutDenom)
return
}