74 lines
1.5 KiB
Go
74 lines
1.5 KiB
Go
package main
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/gob"
|
|
"log"
|
|
"time"
|
|
)
|
|
|
|
// Block represents a block in the blockchain
|
|
type Block struct {
|
|
Timestamp int64
|
|
Transactions []*Transaction
|
|
PrevBlockHash []byte
|
|
Hash []byte
|
|
Nonce int
|
|
Height int
|
|
}
|
|
|
|
// NewBlock creates and returns Block
|
|
func NewBlock(transactions []*Transaction, prevBlockHash []byte, height int) *Block {
|
|
block := &Block{time.Now().Unix(), transactions, prevBlockHash, []byte{}, 0, height}
|
|
pow := NewProofOfWork(block)
|
|
nonce, hash := pow.Run()
|
|
|
|
block.Hash = hash[:]
|
|
block.Nonce = nonce
|
|
|
|
return block
|
|
}
|
|
|
|
// NewGenesisBlock creates and returns genesis Block
|
|
func NewGenesisBlock(coinbase *Transaction) *Block {
|
|
return NewBlock([]*Transaction{coinbase}, []byte{}, 0)
|
|
}
|
|
|
|
// HashTransactions returns a hash of the transactions in the block
|
|
func (b *Block) HashTransactions() []byte {
|
|
var transactions [][]byte
|
|
|
|
for _, tx := range b.Transactions {
|
|
transactions = append(transactions, tx.Serialize())
|
|
}
|
|
mTree := NewMerkleTree(transactions)
|
|
|
|
return mTree.RootNode.Data
|
|
}
|
|
|
|
// Serialize serializes the block
|
|
func (b *Block) Serialize() []byte {
|
|
var result bytes.Buffer
|
|
encoder := gob.NewEncoder(&result)
|
|
|
|
err := encoder.Encode(b)
|
|
if err != nil {
|
|
log.Panic(err)
|
|
}
|
|
|
|
return result.Bytes()
|
|
}
|
|
|
|
// DeserializeBlock deserializes a block
|
|
func DeserializeBlock(d []byte) *Block {
|
|
var block Block
|
|
|
|
decoder := gob.NewDecoder(bytes.NewReader(d))
|
|
err := decoder.Decode(&block)
|
|
if err != nil {
|
|
log.Panic(err)
|
|
}
|
|
|
|
return &block
|
|
}
|