ITExpert0228

package main //Import the main package
// Create the Block data structure
// A block contains this info:
type Block struct {
	Timestamp         int64  // the time when the block was created
	PreviousBlockHash []byte // the hash of the previous block
	MyBlockHash       []byte // the hash of the current block
	AllData           []byte // the data or transactions (body info)
}

ITExpert0228

package main

import (
	// We will need these libraries:
	"bytes"         // need to convert data into byte in order to be sent on the network, computer understands better the byte(8bits)language
	"crypto/sha256" //crypto library to hash the data
	"strconv"       // for conversion
	"time"          // the time for our timestamp
)

ITExpert0228

package main

// create the method that adds a new block to a blockchain
func (blockchain *Blockchain) AddBlock(data string) {
	PreviousBlock := blockchain.Blocks[len(blockchain.Blocks)-1] // the previous block is needed, so let's get it
	newBlock := NewBlock(data, PreviousBlock.MyBlockHash)        // create a new block containing the data and the hash of the previous block
	blockchain.Blocks = append(blockchain.Blocks, newBlock)      // add that block to the chain to create a chain of blocks
}

/* Create the function that returns the whole blockchain and add the genesis to it first. the genesis block is the first ever mined block, so let's create a function that will return it since it does not exist yet */