service backend

api/pkg/decimal/rounding.go

@@ -0,0 +1,29 @@
+package decimal
+
+// RoundingMode specifies how to round decimal values
+type RoundingMode int
+
+const (
+	// RoundingModeUnspecified defaults to HALF_EVEN
+	RoundingModeUnspecified RoundingMode = iota
+	// RoundingModeHalfEven rounds to nearest, ties to even (banker's rounding)
+	RoundingModeHalfEven
+	// RoundingModeHalfUp rounds to nearest, ties away from zero
+	RoundingModeHalfUp
+	// RoundingModeDown rounds toward zero (truncate)
+	RoundingModeDown
+)
+
+// String returns the string representation of the rounding mode
+func (r RoundingMode) String() string {
+	switch r {
+	case RoundingModeHalfEven:
+		return "HALF_EVEN"
+	case RoundingModeHalfUp:
+		return "HALF_UP"
+	case RoundingModeDown:
+		return "DOWN"
+	default:
+		return "HALF_EVEN"
+	}
+}