72 lines
1.1 KiB
Go
72 lines
1.1 KiB
Go
package blockchain
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import (
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"bytes"
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"crypto/sha256"
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"encoding/gob"
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"log"
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)
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type Block struct {
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Hash []byte
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Transactions []*Transaction
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PrevHash []byte
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Nonce int
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}
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func (b *Block) HashTransactions() []byte {
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var txHashes [][]byte
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var txHash [32]byte
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for _, tx := range b.Transactions {
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txHashes = append(txHashes, tx.ID)
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}
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txHash = sha256.Sum256(bytes.Join(txHashes, []byte{}))
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return txHash[:]
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}
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func CreateBlock(txs []*Transaction, prevHash []byte) *Block {
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block := &Block{[]byte{}, txs, prevHash, 0}
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pow := NewProof(block)
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nonce, hash := pow.Run()
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block.Hash = hash[:]
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block.Nonce = nonce
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return block
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}
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func Genesis(coinbase *Transaction) *Block {
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return CreateBlock([]*Transaction{coinbase}, []byte{})
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}
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func (b *Block) Serialize() []byte {
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var res bytes.Buffer
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encoder := gob.NewEncoder(&res)
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err := encoder.Encode(b)
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Handle(err)
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return res.Bytes()
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}
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func Deserialize(data []byte) *Block {
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var block Block
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decoder := gob.NewDecoder(bytes.NewReader(data))
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err := decoder.Decode(&block)
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Handle(err)
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return &block
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}
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func Handle(err error) {
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if err != nil {
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log.Panic(err)
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}
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}
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