38 lines
898 B
Go
38 lines
898 B
Go
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package library
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import (
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"bytes"
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"strconv"
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"strings"
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"time"
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"crypto/rand"
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"encoding/binary"
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"encoding/hex"
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"golang.org/x/crypto/argon2"
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)
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func PoW(difficulty uint64, resource string) (string, error) {
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for {
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initialTime := time.Now().Unix()
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var timestamp [8]byte
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binary.LittleEndian.PutUint64(timestamp[:], uint64(initialTime))
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var nonce [16]byte
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_, err := rand.Read(nonce[:])
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if err != nil {
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return "", err
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}
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output := hex.EncodeToString(argon2.IDKey(nonce[:], bytes.Join([][]byte{timestamp[:], []byte(resource)}, []byte{}), 1, 64*1024, 4, 32))
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var difficultyString strings.Builder
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for range difficulty {
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difficultyString.WriteString("0")
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}
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if strings.HasPrefix(output, difficultyString.String()) {
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return strconv.FormatUint(difficulty, 10) + ":" + strconv.FormatInt(initialTime, 10) + ":" + hex.EncodeToString(nonce[:]) + ":" + output, nil
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}
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}
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}
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