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fix(gamm): SpotPrice keeper function #3715

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merged 13 commits into from
Dec 16, 2022
Merged

fix(gamm): SpotPrice keeper function #3715

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16eb3e5
fix(gamm): SpotPrice keeper function
p0mvn Dec 14, 2022
a96cf58
fix amm mock
p0mvn Dec 14, 2022
09e0ce2
changelog
p0mvn Dec 14, 2022
f9d1f58
try fixing wasmbindings
p0mvn Dec 14, 2022
d40e20b
fix stableswap tests
p0mvn Dec 14, 2022
88ff590
fix txfees tests
p0mvn Dec 14, 2022
2b4174e
fixes
p0mvn Dec 14, 2022
63dee1b
minor fixes
p0mvn Dec 14, 2022
4f8cfeb
comment
p0mvn Dec 14, 2022
b258cfa
Update x/gamm/keeper/grpc_query.go
p0mvn Dec 14, 2022
6652e9a
Update x/gamm/pool-models/balancer/pool.go
p0mvn Dec 14, 2022
d8de9b8
fix comment
p0mvn Dec 14, 2022
cdfff9f
nicolas's comment
p0mvn Dec 16, 2022
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1 change: 1 addition & 0 deletions CHANGELOG.md
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Expand Up @@ -54,6 +54,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
### Bug fixes

* [#3608](https://github.com/osmosis-labs/osmosis/pull/3608) Make it possible to state export from any directory.
* [#3715](https://github.com/osmosis-labs/osmosis/pull/3715) Fix x/gamm CalculateSpotPrice, balancer.SpotPrice and Stableswap.SpotPrice base and quote asset.

### Misc Improvements

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2 changes: 1 addition & 1 deletion app/apptesting/test_suite.go
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Expand Up @@ -333,7 +333,7 @@ func (s *KeeperTestHelper) SwapAndSetSpotPrice(poolId uint64, fromAsset sdk.Coin
)
s.Require().NoError(err)

spotPrice, err := s.App.GAMMKeeper.CalculateSpotPrice(s.Ctx, poolId, toAsset.Denom, fromAsset.Denom)
spotPrice, err := s.App.GAMMKeeper.CalculateSpotPrice(s.Ctx, poolId, fromAsset.Denom, toAsset.Denom)
s.Require().NoError(err)

return spotPrice
Expand Down
6 changes: 3 additions & 3 deletions wasmbinding/queries.go
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Expand Up @@ -63,11 +63,11 @@ func (qp QueryPlugin) GetSpotPrice(ctx sdk.Context, spotPrice *bindings.SpotPric
}

poolId := spotPrice.Swap.PoolId
denomIn := spotPrice.Swap.DenomIn
denomOut := spotPrice.Swap.DenomOut
baseAsset := spotPrice.Swap.DenomOut
quoteAsset := spotPrice.Swap.DenomIn
withSwapFee := spotPrice.WithSwapFee

price, err := qp.gammKeeper.CalculateSpotPrice(ctx, poolId, denomIn, denomOut)
price, err := qp.gammKeeper.CalculateSpotPrice(ctx, poolId, quoteAsset, baseAsset)
if err != nil {
return nil, sdkerrors.Wrap(err, "gamm get spot price")
}
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2 changes: 2 additions & 0 deletions x/gamm/keeper/grpc_query.go
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Expand Up @@ -349,6 +349,8 @@ func (q Querier) SpotPrice(ctx context.Context, req *types.QuerySpotPriceRequest

sdkCtx := sdk.UnwrapSDKContext(ctx)

// Note: the base and quote asset argument order is intentionally incorrect
// due to a historic bug in the original implementation.
sp, err := q.Keeper.CalculateSpotPrice(sdkCtx, req.PoolId, req.BaseAssetDenom, req.QuoteAssetDenom)
if err != nil {
return nil, status.Error(codes.Internal, err.Error())
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4 changes: 2 additions & 2 deletions x/gamm/keeper/pool_service.go
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Expand Up @@ -24,8 +24,8 @@ import (
func (k Keeper) CalculateSpotPrice(
ctx sdk.Context,
poolID uint64,
baseAssetDenom string,
quoteAssetDenom string,
baseAssetDenom string,
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Note: the order is changed to avoid twap migrations

) (spotPrice sdk.Dec, err error) {
pool, err := k.GetPoolAndPoke(ctx, poolID)
if err != nil {
Expand All @@ -40,7 +40,7 @@ func (k Keeper) CalculateSpotPrice(
}
}()

spotPrice, err = pool.SpotPrice(ctx, baseAssetDenom, quoteAssetDenom)
spotPrice, err = pool.SpotPrice(ctx, quoteAssetDenom, baseAssetDenom)
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note: technically, pools could keep the existing parameter order and just get fixed on the implementation level. However, I think it is useful to keep the order consistent with the keeper. As a result, I changed the denom order for pools as well

if err != nil {
return sdk.Dec{}, err
}
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6 changes: 3 additions & 3 deletions x/gamm/keeper/pool_service_test.go
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Expand Up @@ -339,8 +339,8 @@ func (suite *KeeperTestSuite) TestSpotPriceOverflow() {
poolLiquidity: sdk.NewCoins(sdk.NewCoin(denomA, types.MaxSpotPrice.TruncateInt().Add(sdk.OneInt())),
sdk.NewCoin(denomB, sdk.OneInt())),
poolWeights: []int64{1, 1},
quoteAssetDenom: denomB,
baseAssetDenom: denomA,
quoteAssetDenom: denomA,
baseAssetDenom: denomB,
overflows: true,
},
"uniV2 internal error": {
Expand All @@ -363,7 +363,7 @@ func (suite *KeeperTestSuite) TestSpotPriceOverflow() {
osmoassert.ConditionalPanic(suite.T(), tc.panics, func() {
poolSpotPrice, poolErr = pool.SpotPrice(suite.Ctx, tc.baseAssetDenom, tc.quoteAssetDenom)
})
keeperSpotPrice, keeperErr := suite.App.GAMMKeeper.CalculateSpotPrice(suite.Ctx, poolId, tc.baseAssetDenom, tc.quoteAssetDenom)
keeperSpotPrice, keeperErr := suite.App.GAMMKeeper.CalculateSpotPrice(suite.Ctx, poolId, tc.quoteAssetDenom, tc.baseAssetDenom)
if tc.overflows {
suite.Require().NoError(poolErr)
suite.Require().ErrorIs(keeperErr, types.ErrSpotPriceOverflow)
Expand Down
25 changes: 16 additions & 9 deletions x/gamm/pool-models/balancer/pool.go
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Expand Up @@ -611,14 +611,20 @@ func (p *Pool) applySwap(ctx sdk.Context, tokensIn sdk.Coins, tokensOut sdk.Coin

// SpotPrice returns the spot price of the pool
// This is the weight-adjusted balance of the tokens in the pool.
// In order reduce the propagated effect of incorrect trailing digits,
// To reduce the propagated effect of incorrect trailing digits,
// we take the ratio of weights and divide this by ratio of supplies
// this is equivalent to spot_price = (Base_supply / Weight_base) / (Quote_supply / Weight_quote)
// but cancels out the common term in weight.
// this is equivalent to spot_price = (Quote Supply / Quote Weight) / (Base Supply / Base Weight)
//
// As an example, assume equal weights. uosmo supply of 2 and uatom supply of 4.
//
// Case 1: base = uosmo, quote = uatom -> for one uosmo, get 2 uatom = 4 / 2 = 2
// In other words, it costs 2 uatom to get one uosmo.
//
// Case 2: base = uatom, quote = uosmo -> for one uatom, get 0.5 uosmo = 2 / 4 = 0.5
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This is the same thing, but I find it easier to read "it costs 0.5 uosmo to get one uatom" and "it costs "2 uatom to get 1 osmo".

I think this is because the word "quote" implies to me that it is the price/cost of the base asset denominated in quote asset. So, what you're "getting" is the base asset.

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Gotcha, I added your interpretation in comments as well

// In other words, it costs 0.5 uosmo to get one uatom.
//
// panics if the pool in state is incorrect, and has any weight that is 0.
// TODO: Come back and improve docs for this.
func (p Pool) SpotPrice(ctx sdk.Context, baseAsset, quoteAsset string) (spotPrice sdk.Dec, err error) {
func (p Pool) SpotPrice(ctx sdk.Context, quoteAsset, baseAsset string) (spotPrice sdk.Dec, err error) {
quote, base, err := p.parsePoolAssetsByDenoms(quoteAsset, baseAsset)
if err != nil {
return sdk.Dec{}, err
Expand All @@ -627,10 +633,11 @@ func (p Pool) SpotPrice(ctx sdk.Context, baseAsset, quoteAsset string) (spotPric
return sdk.Dec{}, errors.New("pool is misconfigured, got 0 weight")
}

// spot_price = (Base_supply / Weight_base) / (Quote_supply / Weight_quote)
// spot_price = (weight_quote / weight_base) * (base_supply / quote_supply)
invWeightRatio := quote.Weight.ToDec().Quo(base.Weight.ToDec())
supplyRatio := base.Token.Amount.ToDec().Quo(quote.Token.Amount.ToDec())
// spot_price = (Quote Supply / Quote Weight) / (Base Supply / Base Weight)
// = (Quote Supply / Quote Weight) * (Base Weight / Base Supply)
// = (Base Weight / Quote Weight) * (Quote Supply / Base Supply)
invWeightRatio := base.Weight.ToDec().Quo(quote.Weight.ToDec())
supplyRatio := quote.Token.Amount.ToDec().Quo(base.Token.Amount.ToDec())
spotPrice = supplyRatio.Mul(invWeightRatio)

return spotPrice, err
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38 changes: 19 additions & 19 deletions x/gamm/pool-models/balancer/pool_suite_test.go
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Expand Up @@ -713,57 +713,57 @@ func (suite *KeeperTestSuite) TestBalancerSpotPriceBounds() {

tests := []struct {
name string
baseDenomPoolInput sdk.Coin
baseDenomWeight sdk.Int
quoteDenomPoolInput sdk.Coin
quoteDenomWeight sdk.Int
baseDenomPoolInput sdk.Coin
baseDenomWeight sdk.Int
expectError bool
expectedOutput sdk.Dec
}{
{
name: "spot price check at max bitlen supply",
// 2^196, as >= 2^197 trips max bitlen of 256
baseDenomPoolInput: sdk.NewCoin(baseDenom, sdk.MustNewDecFromStr("100433627766186892221372630771322662657637687111424552206336").TruncateInt()),
baseDenomWeight: sdk.NewInt(100),
quoteDenomPoolInput: sdk.NewCoin(quoteDenom, sdk.MustNewDecFromStr("100433627766186892221372630771322662657637687111424552206337").TruncateInt()),
quoteDenomPoolInput: sdk.NewCoin(baseDenom, sdk.MustNewDecFromStr("100433627766186892221372630771322662657637687111424552206336").TruncateInt()),
quoteDenomWeight: sdk.NewInt(100),
baseDenomPoolInput: sdk.NewCoin(quoteDenom, sdk.MustNewDecFromStr("100433627766186892221372630771322662657637687111424552206337").TruncateInt()),
baseDenomWeight: sdk.NewInt(100),
expectError: false,
expectedOutput: sdk.MustNewDecFromStr("1.000000000000000000"),
},
{
name: "spot price check at min supply",
baseDenomPoolInput: sdk.NewCoin(baseDenom, sdk.OneInt()),
baseDenomWeight: sdk.NewInt(100),
quoteDenomPoolInput: sdk.NewCoin(quoteDenom, sdk.OneInt()),
quoteDenomPoolInput: sdk.NewCoin(baseDenom, sdk.OneInt()),
quoteDenomWeight: sdk.NewInt(100),
baseDenomPoolInput: sdk.NewCoin(quoteDenom, sdk.OneInt()),
baseDenomWeight: sdk.NewInt(100),
expectError: false,
expectedOutput: sdk.MustNewDecFromStr("1.000000000000000000"),
},
{
name: "max spot price with equal weights",
baseDenomPoolInput: sdk.NewCoin(baseDenom, types.MaxSpotPrice.TruncateInt()),
baseDenomWeight: sdk.NewInt(100),
quoteDenomPoolInput: sdk.NewCoin(quoteDenom, sdk.OneInt()),
quoteDenomPoolInput: sdk.NewCoin(baseDenom, types.MaxSpotPrice.TruncateInt()),
quoteDenomWeight: sdk.NewInt(100),
baseDenomPoolInput: sdk.NewCoin(quoteDenom, sdk.OneInt()),
baseDenomWeight: sdk.NewInt(100),
expectError: false,
expectedOutput: types.MaxSpotPrice,
},
{
// test int overflows
name: "max spot price with extreme weights",
baseDenomPoolInput: sdk.NewCoin(baseDenom, types.MaxSpotPrice.TruncateInt()),
baseDenomWeight: sdk.OneInt(),
quoteDenomPoolInput: sdk.NewCoin(quoteDenom, sdk.OneInt()),
quoteDenomWeight: sdk.NewInt(1 << 19),
quoteDenomPoolInput: sdk.NewCoin(baseDenom, types.MaxSpotPrice.TruncateInt()),
quoteDenomWeight: sdk.OneInt(),
baseDenomPoolInput: sdk.NewCoin(quoteDenom, sdk.OneInt()),
baseDenomWeight: sdk.NewInt(1 << 19),
expectError: true,
},
{
name: "greater than max spot price with equal weights",
// Max spot price capped at 2^160
baseDenomPoolInput: sdk.NewCoin(baseDenom, types.MaxSpotPrice.TruncateInt().Add(sdk.OneInt())),
baseDenomWeight: sdk.NewInt(100),
quoteDenomPoolInput: sdk.NewCoin(quoteDenom, sdk.OneInt()),
quoteDenomPoolInput: sdk.NewCoin(baseDenom, types.MaxSpotPrice.TruncateInt().Add(sdk.OneInt())),
quoteDenomWeight: sdk.NewInt(100),
baseDenomPoolInput: sdk.NewCoin(quoteDenom, sdk.OneInt()),
baseDenomWeight: sdk.NewInt(100),
expectError: true,
},
}
Expand All @@ -790,7 +790,7 @@ func (suite *KeeperTestSuite) TestBalancerSpotPriceBounds() {

sut := func() {
spotPrice, err := suite.App.GAMMKeeper.CalculateSpotPrice(suite.Ctx,
poolId, tc.baseDenomPoolInput.Denom, tc.quoteDenomPoolInput.Denom)
poolId, tc.quoteDenomPoolInput.Denom, tc.baseDenomPoolInput.Denom)
if tc.expectError {
suite.Require().Error(err, "test: %s", tc.name)
} else {
Expand Down
5 changes: 2 additions & 3 deletions x/gamm/pool-models/stableswap/amm.go
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Expand Up @@ -357,7 +357,7 @@ func solveCFMMBinarySearchMulti(xReserve, yReserve, wSumSquares, yIn osmomath.Bi
return xOut
}

func (p Pool) spotPrice(baseDenom, quoteDenom string) (spotPrice sdk.Dec, err error) {
func (p Pool) spotPrice(quoteDenom, baseDenom string) (spotPrice sdk.Dec, err error) {
// Define f_{y -> x}(a) as the function that outputs the amount of tokens X you'd get by
// trading "a" units of Y against the pool, assuming 0 swap fee, at the current liquidity.
// The spot price of the pool is then lim a -> 0, f_{y -> x}(a) / a
Expand All @@ -373,8 +373,7 @@ func (p Pool) spotPrice(baseDenom, quoteDenom string) (spotPrice sdk.Dec, err er
// xReserve & yReserve.
a := sdk.OneInt()

// We swap quoteDenom and baseDenom intentionally, due to the odd issue needed for balancer v1 query compat
res, err := p.calcOutAmtGivenIn(sdk.NewCoin(quoteDenom, a), baseDenom, sdk.ZeroDec())
res, err := p.calcOutAmtGivenIn(sdk.NewCoin(baseDenom, a), quoteDenom, sdk.ZeroDec())
// fmt.Println("spot price res", res)
return res, err
}
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4 changes: 2 additions & 2 deletions x/gamm/pool-models/stableswap/pool.go
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Expand Up @@ -331,8 +331,8 @@ func (p *Pool) SwapInAmtGivenOut(ctx sdk.Context, tokenOut sdk.Coins, tokenInDen

// SpotPrice calculates the approximate amount of `baseDenom` one would receive for
// an input dx of `quoteDenom` (to simplify calculations, we approximate dx = 1)
func (p Pool) SpotPrice(ctx sdk.Context, baseAssetDenom string, quoteAssetDenom string) (sdk.Dec, error) {
return p.spotPrice(baseAssetDenom, quoteAssetDenom)
func (p Pool) SpotPrice(ctx sdk.Context, quoteAssetDenom string, baseAssetDenom string) (sdk.Dec, error) {
return p.spotPrice(quoteAssetDenom, baseAssetDenom)
}

func (p Pool) Copy() Pool {
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11 changes: 6 additions & 5 deletions x/gamm/pool-models/stableswap/pool_test.go
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Expand Up @@ -7,11 +7,12 @@ import (
sdk "github.com/cosmos/cosmos-sdk/types"
"github.com/stretchr/testify/require"

"github.com/tendermint/tendermint/crypto/ed25519"

"github.com/osmosis-labs/osmosis/v13/app/apptesting/osmoassert"
"github.com/osmosis-labs/osmosis/v13/osmomath"
"github.com/osmosis-labs/osmosis/v13/x/gamm/pool-models/internal/cfmm_common"
"github.com/osmosis-labs/osmosis/v13/x/gamm/types"
"github.com/tendermint/tendermint/crypto/ed25519"
)

var (
Expand Down Expand Up @@ -1217,15 +1218,15 @@ func TestStableswapSpotPrice(t *testing.T) {
quoteDenom: "bar",
poolAssets: twoUnevenStablePoolAssets,
scalingFactors: []uint64{10000, 20000},
expectedPrice: sdk.NewDec(2),
expectedPrice: sdk.NewDecWithPrec(5, 1),
expectPass: true,
},
"even two-asset pool with different scaling factors (bar -> foo)": {
baseDenom: "bar",
quoteDenom: "foo",
poolAssets: twoUnevenStablePoolAssets,
scalingFactors: []uint64{10000, 20000},
expectedPrice: sdk.NewDecWithPrec(5, 1),
expectedPrice: sdk.NewDec(2),
expectPass: true,
},
"uneven two-asset pool": {
Expand Down Expand Up @@ -1328,7 +1329,7 @@ func TestStableswapSpotPrice(t *testing.T) {
t.Run(name, func(t *testing.T) {
ctx := sdk.Context{}
p := poolStructFromAssets(tc.poolAssets, tc.scalingFactors)
spotPrice, err := p.SpotPrice(ctx, tc.baseDenom, tc.quoteDenom)
spotPrice, err := p.SpotPrice(ctx, tc.quoteDenom, tc.baseDenom)

if tc.expectPass {
require.NoError(t, err)
Expand All @@ -1337,7 +1338,7 @@ func TestStableswapSpotPrice(t *testing.T) {
if (tc.expectedPrice != sdk.Dec{}) {
expectedSpotPrice = tc.expectedPrice
} else {
expectedSpotPrice, err = p.calcOutAmtGivenIn(sdk.NewInt64Coin(tc.quoteDenom, 1), tc.baseDenom, sdk.ZeroDec())
expectedSpotPrice, err = p.calcOutAmtGivenIn(sdk.NewInt64Coin(tc.baseDenom, 1), tc.quoteDenom, sdk.ZeroDec())
require.NoError(t, err)
}

Expand Down
2 changes: 1 addition & 1 deletion x/swaprouter/types/pool.go
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Expand Up @@ -31,5 +31,5 @@ type PoolI interface {
// errors if either baseAssetDenom, or quoteAssetDenom does not exist.
// For example, if this was a UniV2 50-50 pool, with 2 ETH, and 8000 UST
// pool.SpotPrice(ctx, "eth", "ust") = 4000.00
SpotPrice(ctx sdk.Context, baseAssetDenom string, quoteAssetDenom string) (sdk.Dec, error)
SpotPrice(ctx sdk.Context, quoteAssetDenom string, baseAssetDenom string) (sdk.Dec, error)
}
2 changes: 2 additions & 0 deletions x/twap/logic.go
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Expand Up @@ -55,7 +55,9 @@ func getSpotPrices(
previousErrorTime time.Time,
) (sp0 sdk.Dec, sp1 sdk.Dec, latestErrTime time.Time) {
latestErrTime = previousErrorTime
// sp0 = denom0 quote, denom1 base.
sp0, err0 := k.CalculateSpotPrice(ctx, poolId, denom0, denom1)
// sp1 = denom0 base, denom1 quote.
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useful to have these comments here!

sp1, err1 := k.CalculateSpotPrice(ctx, poolId, denom1, denom0)
if err0 != nil || err1 != nil {
latestErrTime = ctx.BlockTime()
Expand Down
2 changes: 1 addition & 1 deletion x/twap/types/expected_interfaces.go
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Expand Up @@ -12,7 +12,7 @@ type AmmInterface interface {
CalculateSpotPrice(
ctx sdk.Context,
poolID uint64,
baseAssetDenom string,
quoteAssetDenom string,
baseAssetDenom string,
) (price sdk.Dec, err error)
}
8 changes: 4 additions & 4 deletions x/twap/types/twapmock/amminterface.go
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Expand Up @@ -52,7 +52,7 @@ func (p *ProgrammedAmmInterface) ProgramPoolDenomsOverride(poolId uint64, overri
}

func (p *ProgrammedAmmInterface) ProgramPoolSpotPriceOverride(poolId uint64,
baseDenom, quoteDenom string, overrideSp sdk.Dec, overrideErr error,
quoteDenom, baseDenom string, overrideSp sdk.Dec, overrideErr error,
) {
input := SpotPriceInput{poolId, baseDenom, quoteDenom}
p.programmedSpotPrice[input] = SpotPriceResult{overrideSp, overrideErr}
Expand All @@ -71,12 +71,12 @@ func (p *ProgrammedAmmInterface) GetPoolDenoms(ctx sdk.Context, poolId uint64) (

func (p *ProgrammedAmmInterface) CalculateSpotPrice(ctx sdk.Context,
poolId uint64,
baseDenom,
quoteDenom string,
quoteDenom,
baseDenom string,
) (price sdk.Dec, err error) {
input := SpotPriceInput{poolId, baseDenom, quoteDenom}
if res, ok := p.programmedSpotPrice[input]; ok {
return res.Sp, res.Err
}
return p.underlyingKeeper.CalculateSpotPrice(ctx, poolId, baseDenom, quoteDenom)
return p.underlyingKeeper.CalculateSpotPrice(ctx, poolId, quoteDenom, baseDenom)
}
1 change: 1 addition & 0 deletions x/txfees/keeper/feetokens.go
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Expand Up @@ -2,6 +2,7 @@ package keeper

import (
"github.com/gogo/protobuf/proto"

"github.com/osmosis-labs/osmosis/v13/x/txfees/types"

sdk "github.com/cosmos/cosmos-sdk/types"
Expand Down
6 changes: 4 additions & 2 deletions x/txfees/keeper/feetokens_test.go
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Expand Up @@ -179,7 +179,9 @@ func (suite *KeeperTestSuite) TestFeeTokenConversions() {
baseDenomPoolInput: sdk.NewInt64Coin(baseDenom, 100),
feeTokenPoolInput: sdk.NewInt64Coin("foo", 200),
inputFee: sdk.NewInt64Coin("foo", 10),
// expected to get 5.000000000005368710 baseDenom without rounding
// expected to get approximately 5 base denom
// foo supply / stake supply = 200 / 100 = 2 foo for 1 stake
// 10 foo in / 2 foo for 1 stake = 5 base denom
expectedOutput: sdk.NewInt64Coin(baseDenom, 5),
expectedConvertable: true,
},
Expand Down Expand Up @@ -215,7 +217,7 @@ func (suite *KeeperTestSuite) TestFeeTokenConversions() {
converted, err := suite.App.TxFeesKeeper.ConvertToBaseToken(suite.Ctx, tc.inputFee)
if tc.expectedConvertable {
suite.Require().NoError(err, "test: %s", tc.name)
suite.Require().True(converted.IsEqual(tc.expectedOutput), "test: %s", tc.name)
suite.Require().Equal(tc.expectedOutput, converted)
} else {
suite.Require().Error(err, "test: %s", tc.name)
}
Expand Down
2 changes: 1 addition & 1 deletion x/txfees/types/expected_keepers.go
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Expand Up @@ -8,7 +8,7 @@ import (
// SpotPriceCalculator defines the contract that must be fulfilled by a spot price calculator
// The x/gamm keeper is expected to satisfy this interface.
type SpotPriceCalculator interface {
CalculateSpotPrice(ctx sdk.Context, poolId uint64, tokenInDenom, tokenOutDenom string) (sdk.Dec, error)
CalculateSpotPrice(ctx sdk.Context, poolId uint64, quoteDenom, baseDenom string) (sdk.Dec, error)
}

// GammKeeper defines the contract needed for AccountKeeper related APIs.
Expand Down