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43 lines
1005 B
43 lines
1005 B
package main
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import (
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"bytes"
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"crypto/sha256"
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"time"
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)
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// Block keeps block headers.
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type Block struct {
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Timestamp int64
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Transactions []*Transaction
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PrevBlockHash []byte
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Hash []byte
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}
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// HashTransactions returns a hash of the transactions in the block
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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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// NewBlock creates and returns Block.
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func NewBlock(utxoPool []UTXOPool, prevBlockHash []byte) *Block {
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block := &Block{time.Now().Unix(), utxoPool, prevBlockHash, []byte{}}
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block.SetHash()
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return block
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}
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// NewGenesisBlock creates and returns genesis Block.
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func NewGenesisBlock() *Block {
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genesisUTXOPool := UTXOPool{}
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genesisUTXOPool.utxos["genesis"] = TOTAL_COINS
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return NewBlock(genesisUTXOPool, []byte{})
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}
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