/
utils.go
128 lines (102 loc) · 2.2 KB
/
utils.go
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package wakacoin
import (
"bytes"
"encoding/binary"
"fmt"
"math/rand"
"os"
"time"
)
func CliCheckErr(err error) {
if err != nil {
fmt.Println("\n", err)
os.Exit(1)
}
}
func CheckErr(err error) {
if err != nil {
PrintErr(err)
msg := fmt.Sprintf("%s blockchain, panic: %s", blockChain, err)
SendAdminEmail(msg)
panic(err)
}
}
func PrintErr(err interface{}) {
if err != nil {
t := time.Now().UTC()
timeNow := t.Format("02 Jan 15:04:05")
fmt.Println(timeNow, err)
}
}
func PrintMessage(str string) {
if len(str) != 0 {
t := time.Now().UTC()
timeNow := t.Format("02 Jan 15:04:05")
fmt.Println(timeNow, str)
}
}
func Uint8ToByte(num uint8) []byte {
buf := new(bytes.Buffer)
err := binary.Write(buf, binary.BigEndian, num)
CheckErr(err)
return buf.Bytes()
}
func Uint32ToByte(num uint32) []byte {
buf := new(bytes.Buffer)
err := binary.Write(buf, binary.BigEndian, num)
CheckErr(err)
return buf.Bytes()
}
func Int64ToByte(num int64) []byte {
buf := new(bytes.Buffer)
err := binary.Write(buf, binary.BigEndian, num)
CheckErr(err)
return buf.Bytes()
}
func Uint64ToByte(num uint64) []byte {
buf := new(bytes.Buffer)
err := binary.Write(buf, binary.BigEndian, num)
CheckErr(err)
return buf.Bytes()
}
func ByteToUint32(b []byte) (num uint32) {
bytesBuffer := bytes.NewBuffer(b)
binary.Read(bytesBuffer, binary.BigEndian, &num)
return num
}
func ReverseBytes(data []byte) {
for i, j := 0, len(data)-1; i < j; i, j = i+1, j-1 {
data[i], data[j] = data[j], data[i]
}
}
func ReverseHashes(data [][32]byte) {
for i, j := 0, len(data)-1; i < j; i, j = i+1, j-1 {
data[i], data[j] = data[j], data[i]
}
}
func Reverse20ByteHashes(data [][20]byte) {
for i, j := 0, len(data)-1; i < j; i, j = i+1, j-1 {
data[i], data[j] = data[j], data[i]
}
}
func generateRandomNumber(start int, end int, count int) []int {
if end < start || (end-start) < count {
return nil
}
nums := make([]int, 0)
r := rand.New(rand.NewSource(time.Now().UnixNano()))
for len(nums) < count {
num := r.Intn((end - start)) + start
exist := false
for _, v := range nums {
if v == num {
exist = true
break
}
}
if !exist {
nums = append(nums, num)
}
}
return nums
}