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