mirror of
https://github.com/nspcc-dev/neo-go.git
synced 2024-12-23 23:25:22 +00:00
54 lines
1 KiB
Go
54 lines
1 KiB
Go
package random
|
|
|
|
import (
|
|
"math/rand"
|
|
"time"
|
|
|
|
"github.com/nspcc-dev/neo-go/pkg/crypto/hash"
|
|
"github.com/nspcc-dev/neo-go/pkg/util"
|
|
)
|
|
|
|
// String returns a random string with the n as its length.
|
|
func String(n int) string {
|
|
b := make([]byte, n)
|
|
for i := range b {
|
|
b[i] = byte(Int(65, 90))
|
|
}
|
|
|
|
return string(b)
|
|
}
|
|
|
|
// Bytes returns a random byte slice of specified length.
|
|
func Bytes(n int) []byte {
|
|
b := make([]byte, n)
|
|
Fill(b)
|
|
return b
|
|
}
|
|
|
|
// Fill fills buffer with random bytes.
|
|
func Fill(buf []byte) {
|
|
r := rand.New(rand.NewSource(time.Now().UnixNano()))
|
|
// Rand reader returns no errors
|
|
r.Read(buf)
|
|
}
|
|
|
|
// Int returns a random integer in [min,max).
|
|
func Int(min, max int) int {
|
|
return min + rand.Intn(max-min)
|
|
}
|
|
|
|
// Uint256 returns a random Uint256.
|
|
func Uint256() util.Uint256 {
|
|
str := String(20)
|
|
return hash.Sha256([]byte(str))
|
|
}
|
|
|
|
// Uint160 returns a random Uint160.
|
|
func Uint160() util.Uint160 {
|
|
str := String(20)
|
|
return hash.RipeMD160([]byte(str))
|
|
}
|
|
|
|
func init() {
|
|
rand.Seed(time.Now().UTC().UnixNano())
|
|
}
|