begin int64 to uint64 migration

libs/math/math.go

@@ -7,6 +7,13 @@ func MaxInt64(a, b int64) int64 {
 	return b
 }
 
+func MaxUint64(a, b uint64) uint64 {
+	if a > b {
+		return a
+	}
+	return b
+}
+
 func MaxInt(a, b int) int {
 	if a > b {
 		return a
@@ -23,6 +30,13 @@ func MinInt64(a, b int64) int64 {
 	return b
 }
 
+func MinUint64(a, b uint64) uint64 {
+	if a < b {
+		return a
+	}
+	return b
+}
+
 func MinInt(a, b int) int {
 	if a < b {
 		return a

libs/math/safemath.go

@@ -33,11 +33,9 @@ func SafeSubInt32(a, b int32) int32 {
 
 // SafeConvertInt32 takes a int and checks if it overflows
 // If there is an overflow this will panic
-func SafeConvertInt32(a int64) int32 {
+func SafeConvertInt32(a uint64) int32 {
 	if a > math.MaxInt32 {
 		panic(ErrOverflowInt32)
-	} else if a < math.MinInt32 {
-		panic(ErrOverflowInt32)
 	}
 	return int32(a)
 }