package main

import "time"

// Blockchain keeps a sequence of Blocks
type Blockchain struct {
	blocks []*Block
}

// AddBlock saves provided data as a block in the blockchain
func (bc *Blockchain) AddBlock(data string) {
	prevBlock := bc.blocks[len(bc.blocks)-1]
	newBlock := &Block{time.Now().Unix(), []byte(data), prevBlock.hash, []byte("")}
	newBlock.SetHash()
	bc.blocks = append(bc.blocks, newBlock)
}

// NewBlockchain creates a new Blockchain with genesis Block
func NewBlockchain() *Blockchain {
	return &Blockchain{[]*Block{NewGenesisBlock()}}
}