fix: lower the highest tick boundary for extra safety

(cherry picked from commit 99b5bf5)

x/liquidity/amm/tick.go

@@ -145,7 +145,9 @@ func DownTick(price sdk.Dec, prec int) sdk.Dec {
 
 // HighestTick returns the highest possible price tick.
 func HighestTick(prec int) sdk.Dec {
-	i := new(big.Int).SetBits([]big.Word{0, 0, 0, 0, 0x1000000000000000})
+	i := big.NewInt(2)
+	// Maximum 315 bits possible, but take slightly less value for safety.
+	i.Exp(i, big.NewInt(300), nil).Sub(i, big.NewInt(1))
 	return PriceToDownTick(sdk.NewDecFromBigIntWithPrec(i, sdk.Precision), prec)
 }
 

x/liquidity/amm/tick_test.go

@@ -110,18 +110,15 @@ func TestHighestTick(t *testing.T) {
 		prec     int
 		expected string
 	}{
-		{3, "133400000000000000000000000000000000000000000000000000000000000000000000000000"},
-		{0, "100000000000000000000000000000000000000000000000000000000000000000000000000000"},
-		{1, "130000000000000000000000000000000000000000000000000000000000000000000000000000"},
+		{3, "2037000000000000000000000000000000000000000000000000000000000000000000000"},
+		{0, "2000000000000000000000000000000000000000000000000000000000000000000000000"},
+		{1, "2000000000000000000000000000000000000000000000000000000000000000000000000"},
 	} {
 		t.Run("", func(t *testing.T) {
 			i, ok := new(big.Int).SetString(tc.expected, 10)
 			require.True(t, ok)
 			tick := amm.HighestTick(tc.prec)
 			require.True(sdk.DecEq(t, sdk.NewDecFromBigInt(i), tick))
-			require.Panics(t, func() {
-				amm.UpTick(tick, tc.prec)
-			})
 		})
 	}
 }