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88 lines
1.7 KiB
88 lines
1.7 KiB
9 years ago
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package util
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import (
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"bytes"
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"encoding/binary"
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"encoding/hex"
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"math/big"
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"math/rand"
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"strconv"
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"time"
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"unicode/utf8"
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"../../cnutil"
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)
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var Diff1 *big.Int
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func init() {
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Diff1 = new(big.Int)
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Diff1.SetString("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF", 16)
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}
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func Random() string {
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min := int64(100000000000000)
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max := int64(999999999999999)
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n := rand.Int63n(max-min+1) + min
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return strconv.FormatInt(n, 10)
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}
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func MakeTimestamp() int64 {
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return time.Now().UnixNano() / int64(time.Millisecond)
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}
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func GetTargetHex(diff int64) (uint32, string) {
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padded := make([]byte, 32)
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diff2 := new(big.Int)
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diff2.SetInt64(int64(diff))
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diff3 := new(big.Int)
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diff3 = diff3.Div(Diff1, diff2)
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diffBuff := diff3.Bytes()
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copy(padded[32-len(diffBuff):], diffBuff)
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buff := padded[0:4]
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var target uint32
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targetBuff := bytes.NewReader(buff)
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binary.Read(targetBuff, binary.LittleEndian, &target)
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targetHex := hex.EncodeToString(reverse(buff))
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return target, targetHex
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}
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func GetHashDifficulty(hashBytes []byte) *big.Int {
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diff := new(big.Int)
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diff.SetBytes(reverse(hashBytes))
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return diff.Div(Diff1, diff)
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}
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func ValidateAddress(addy string, poolAddy string) bool {
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if len(addy) != len(poolAddy) {
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return false
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}
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prefix, _ := utf8.DecodeRuneInString(addy)
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poolPrefix, _ := utf8.DecodeRuneInString(poolAddy)
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if prefix != poolPrefix {
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return false
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}
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return cnutil.ValidateAddress(addy)
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}
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func StringInSlice(a string, list []string) bool {
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for _, b := range list {
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if b == a {
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return true
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}
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}
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return false
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}
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func reverse(src []byte) []byte {
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dst := make([]byte, len(src))
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for i := len(src); i > 0; i-- {
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dst[len(src)-i] = src[i-1]
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}
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return dst
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}
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