Merge pull request #4756 from zhangyelong/yelong/4443-coinswap

Fix GetInputAmount formula
cosmos · Aug 8, 2019 · cf88b4f · cf88b4f
2 parents e640d5a + 6398e9b
commit cf88b4f
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/x/coinswap/internal/keeper/swap.go b/x/coinswap/internal/keeper/swap.go
@@ -40,7 +40,7 @@ func (k Keeper) GetInputAmount(ctx sdk.Context, outputAmt sdk.Int, inputDenom, o
 	outputBalance := reservePool.AmountOf(outputDenom)
 	fee := k.GetFeeParam(ctx)
 
-	numerator := inputBalance.Mul(outputBalance).Mul(fee.Denominator)
+	numerator := inputBalance.Mul(outputAmt).Mul(fee.Denominator)
 	denominator := (outputBalance.Sub(outputAmt)).Mul(fee.Numerator)
 	return numerator.Quo(denominator).Add(sdk.OneInt())
 }