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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,139 @@ | ||
| package cfmm_common_test | ||
|
|
||
| import ( | ||
| "testing" | ||
| "time" | ||
|
|
||
| "github.com/stretchr/testify/require" | ||
|
|
||
| "github.com/osmosis-labs/osmosis/v7/x/gamm/pool-models/balancer" | ||
| "github.com/osmosis-labs/osmosis/v7/x/gamm/pool-models/internal/cfmm_common" | ||
| "github.com/osmosis-labs/osmosis/v7/x/gamm/pool-models/stableswap" | ||
| gammtypes "github.com/osmosis-labs/osmosis/v7/x/gamm/types" | ||
|
|
||
| sdk "github.com/cosmos/cosmos-sdk/types" | ||
| ) | ||
|
|
||
| // a helper function used to multiply coins | ||
| func mulCoins(coins sdk.Coins, multiplier sdk.Dec) sdk.Coins { | ||
| outCoins := sdk.Coins{} | ||
| for _, coin := range coins { | ||
| outCoin := sdk.NewCoin(coin.Denom, multiplier.MulInt(coin.Amount).TruncateInt()) | ||
| if !outCoin.Amount.IsZero() { | ||
| outCoins = append(outCoins, outCoin) | ||
| } | ||
| } | ||
| return outCoins | ||
| } | ||
|
|
||
| func TestCalcExitPool(t *testing.T) { | ||
|
|
||
| emptyContext := sdk.Context{} | ||
|
|
||
| twoStablePoolAssets := sdk.NewCoins( | ||
| sdk.NewInt64Coin("foo", 1000000000), | ||
| sdk.NewInt64Coin("bar", 1000000000), | ||
| ) | ||
|
|
||
| threeBalancerPoolAssets := []balancer.PoolAsset{ | ||
| {Token: sdk.NewInt64Coin("foo", 2000000000), Weight: sdk.NewIntFromUint64(5)}, | ||
| {Token: sdk.NewInt64Coin("bar", 3000000000), Weight: sdk.NewIntFromUint64(5)}, | ||
| {Token: sdk.NewInt64Coin("baz", 4000000000), Weight: sdk.NewIntFromUint64(5)}, | ||
| } | ||
|
|
||
| // create these pools used for testing | ||
| twoAssetPool, err := stableswap.NewStableswapPool( | ||
| 1, | ||
| stableswap.PoolParams{ExitFee: sdk.ZeroDec()}, | ||
| twoStablePoolAssets, | ||
| "", | ||
| time.Now(), | ||
| ) | ||
| require.NoError(t, err) | ||
|
|
||
| threeAssetPool, err := balancer.NewBalancerPool( | ||
| 1, | ||
| balancer.PoolParams{SwapFee: sdk.ZeroDec(), ExitFee: sdk.ZeroDec()}, | ||
| threeBalancerPoolAssets, | ||
| "", | ||
| time.Now(), | ||
| ) | ||
| require.NoError(t, err) | ||
|
|
||
| twoAssetPoolWithExitFee, err := stableswap.NewStableswapPool( | ||
| 1, | ||
| stableswap.PoolParams{ExitFee: sdk.MustNewDecFromStr("0.0001")}, | ||
| twoStablePoolAssets, | ||
| "", | ||
| time.Now(), | ||
| ) | ||
| require.NoError(t, err) | ||
|
|
||
| threeAssetPoolWithExitFee, err := balancer.NewBalancerPool( | ||
| 1, | ||
| balancer.PoolParams{SwapFee: sdk.ZeroDec(), ExitFee: sdk.MustNewDecFromStr("0.0002")}, | ||
| threeBalancerPoolAssets, | ||
| "", | ||
| time.Now(), | ||
| ) | ||
| require.NoError(t, err) | ||
|
|
||
| tests := []struct { | ||
| name string | ||
| pool gammtypes.PoolI | ||
| exitingShares sdk.Int | ||
| expError bool | ||
| }{ | ||
| { | ||
| name: "two-asset pool, exiting shares grater than total shares", | ||
| pool: &twoAssetPool, | ||
| exitingShares: twoAssetPool.GetTotalShares().AddRaw(1), | ||
| expError: true, | ||
| }, | ||
| { | ||
| name: "three-asset pool, exiting shares grater than total shares", | ||
| pool: &threeAssetPool, | ||
| exitingShares: threeAssetPool.GetTotalShares().AddRaw(1), | ||
| expError: true, | ||
| }, | ||
| { | ||
| name: "two-asset pool, valid exiting shares", | ||
| pool: &twoAssetPool, | ||
| exitingShares: twoAssetPool.GetTotalShares().QuoRaw(2), | ||
| expError: false, | ||
| }, | ||
| { | ||
| name: "three-asset pool, valid exiting shares", | ||
| pool: &threeAssetPool, | ||
| exitingShares: sdk.NewIntFromUint64(3000000000000), | ||
| expError: false, | ||
| }, | ||
| { | ||
| name: "two-asset pool with exit fee, valid exiting shares", | ||
| pool: &twoAssetPoolWithExitFee, | ||
| exitingShares: twoAssetPoolWithExitFee.GetTotalShares().QuoRaw(2), | ||
| expError: false, | ||
| }, | ||
| { | ||
| name: "three-asset pool with exit fee, valid exiting shares", | ||
| pool: &threeAssetPoolWithExitFee, | ||
| exitingShares: sdk.NewIntFromUint64(7000000000000), | ||
| expError: false, | ||
| }, | ||
| } | ||
|
|
||
| for _, test := range tests { | ||
| // using empty context since, currently, the context is not used anyway. This might be changed in the future | ||
| exitFee := test.pool.GetExitFee(emptyContext) | ||
| exitCoins, err := cfmm_common.CalcExitPool(emptyContext, test.pool, test.exitingShares, exitFee) | ||
| if test.expError { | ||
| require.Error(t, err, "test: %v", test.name) | ||
| } else { | ||
| require.NoError(t, err, "test: %v", test.name) | ||
|
|
||
| // exitCoins = ( (1 - exitFee) * exitingShares / poolTotalShares ) * poolTotalLiquidity | ||
| expExitCoins := mulCoins(test.pool.GetTotalPoolLiquidity(emptyContext), (sdk.OneDec().Sub(exitFee)).MulInt(test.exitingShares).QuoInt(test.pool.GetTotalShares())) | ||
| require.Equal(t, expExitCoins.Sort().String(), exitCoins.Sort().String(), "test: %v", test.name) | ||
| } | ||
| } | ||
| } |
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