DEV-2046/AMM & DEV-2060/ORACLE (#859)

* Pools should not be created with more than two assets

* oracle endpoints were fixed

proto/elys/oracle/query.proto

@@ -37,11 +37,11 @@ service Query {
 	}
     // Queries a Price by asset.
     rpc Price(QueryGetPriceRequest) returns (QueryGetPriceResponse) {
-		option (google.api.http).get = "/elys-network/elys/oracle/price";
+		option (google.api.http).get = "/elys-network/elys/oracle/price/{asset}";
 	}
 	// Queries a list of Price items.
 	rpc PriceAll(QueryAllPriceRequest) returns (QueryAllPriceResponse) {
-		option (google.api.http).get = "/elys-network/elys/oracle/price";
+		option (google.api.http).get = "/elys-network/elys/oracle/prices";
 	}
 	// Queries a PriceFeeder by feeder.
 	rpc PriceFeeder(QueryGetPriceFeederRequest) returns (QueryGetPriceFeederResponse) {

x/amm/types/errors.go

@@ -38,6 +38,7 @@ var (
 	ErrExitFeeShouldNotExceedTwoPercent = errors.Register(ModuleName, 110, "exit fee should not exceed 2%")
 	ErrFeeShouldNotBeNegative           = errors.Register(ModuleName, 111, "fee should not be negative")
 	ErrInvalidShareAmountOut            = errors.Register(ModuleName, 112, "invalid share amount out")
+	ErrPoolAssetsMustBeTwo              = errors.Register(ModuleName, 113, "pool assets must be exactly two")
 )
 
 const (

x/amm/types/message_create_pool.go

@@ -45,6 +45,10 @@ func (msg *MsgCreatePool) ValidateBasic() error {
 		return errorsmod.Wrapf(sdkerrors.ErrInvalidAddress, "invalid sender address (%s)", err)
 	}
 
+	if len(msg.PoolAssets) != 2 {
+		return ErrPoolAssetsMustBeTwo
+	}
+
 	if msg.PoolParams == nil {
 		return ErrPoolParamsShouldNotBeNil
 	}

x/amm/types/message_create_pool_test.go

@@ -34,7 +34,32 @@ func TestMsgCreatePool_ValidateBasic(t *testing.T) {
 				},
 			},
 			err: sdkerrors.ErrInvalidAddress,
-		}, {
+		},
+		{
+			name: "pool assets must be exactly two",
+			msg: types.MsgCreatePool{
+				Sender: sample.AccAddress(),
+				PoolParams: &types.PoolParams{
+					SwapFee:                     sdk.ZeroDec(),
+					ExitFee:                     sdk.ZeroDec(),
+					UseOracle:                   false,
+					WeightBreakingFeeMultiplier: sdk.ZeroDec(),
+					WeightBreakingFeeExponent:   sdk.NewDecWithPrec(25, 1), // 2.5
+					ExternalLiquidityRatio:      sdk.NewDec(1),
+					WeightRecoveryFeePortion:    sdk.NewDecWithPrec(10, 2), // 10%
+					ThresholdWeightDifference:   sdk.ZeroDec(),
+					FeeDenom:                    ptypes.BaseCurrency,
+				},
+				PoolAssets: []types.PoolAsset{
+					{
+						Token:  sdk.NewCoin("uatom", sdk.NewInt(10000000)),
+						Weight: sdk.NewInt(10),
+					},
+				},
+			},
+			err: types.ErrPoolAssetsMustBeTwo,
+		},
+		{
 			name: "valid address",
 			msg: types.MsgCreatePool{
 				Sender: sample.AccAddress(),
@@ -49,6 +74,16 @@ func TestMsgCreatePool_ValidateBasic(t *testing.T) {
 					ThresholdWeightDifference:   sdk.ZeroDec(),
 					FeeDenom:                    ptypes.BaseCurrency,
 				},
+				PoolAssets: []types.PoolAsset{
+					{
+						Token:  sdk.NewCoin("uusdc", sdk.NewInt(10000000)),
+						Weight: sdk.NewInt(10),
+					},
+					{
+						Token:  sdk.NewCoin("uatom", sdk.NewInt(10000000)),
+						Weight: sdk.NewInt(10),
+					},
+				},
 			},
 		},
 	}