一、简单区块链的创建过程
1、创建区块结构体
type Block struct{
PrevBlockHash []byte
Hash []byte
Data []byte
Timestamp int64
Height int64
}
2、创建新区块
func (block *Block) SetHash() { //这个是创建区块的hash值，创建的规则是由自己定的
//将整数转换成 []byte
heightBytes := IntToHex(block.Height)
//将时间戳转换成 []byte
timeString := strconv.FormatInt(block.Timestamp, 2)
timeBytes := []byte(timeString)
//拼接所有属性
blockBytes := bytes.Join([][]byte{
block.PrevBlockHash,block.Data,timeBytes, heightBytes},[]byte{})
//生成Hash
hash := sha256.Sum256(blockBytes)
block.Hash = hash[:]
}
func NewBlock(data string, height int64, prevBlockHash []byte) *Block{
// 创建区块
block := &Block{PrevBlockHash:prevBlockHash, Hash:nil, Data:[]byte(data), Timestamp:time.Now().Unix(), Height:height}
//设置Hash值
block.SetHash()
return block
}
3、创建一个创世区块
//单独写一个创建创世区块
func CreateGenesisBlock(data string) *Block {
return NewBlock(data, 1, []byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0})
}
4、创建区块链结构体
type Blockchain struct {
Blocks []*Block //存储有序的区块
}
5、创建带有创世区块的区块链
func CreateBlockchainWithGenesisBlock() *Blockchain {
genesisBlock := CreateGenesisBlock("布衣")
blockchain := &Blockchain{ []*Block{genesisBlock } }
return blockchain
}
6、增加区块到区块链
func (blc *Blockchain) AddBlockToBlockchain(data string, height int64, prevBlockHash []byte) {
newBlock := NewBlock(data, height, prevBlcokHash)
blc.Blocks = append(blc.Blocks, newBlock)
}