package main
import (
"bytes"
"crypto/sha256"
"strconv"
"time"
)
type Block struct {
Timestamp int64
Data []byte
PrevBlockHash []byte
Hash []byte
}
func (b *Block) SetHash() {
timestamp := []byte(strconv.FormatInt(b.Timestamp, 10))
headers := bytes.Join([][]byte{b.PrevBlockHash, b.Data, timestamp}, []byte{})
hash := sha256.Sum256(headers)
b.Hash = hash[:]
}
func NewBlock(data string, prevBlockHash []byte) *Block {
block := &Block{time.Now().Unix(), []byte(data), prevBlockHash, []byte{}}
block.SetHash()
return block
}
func NewGenesisBlock() *Block {
return NewBlock("Genesis Block", []byte{})
}
