def create_chain_from_dump(chain_dump):
gen_blockchain = BlockChain()
gen_blockchain.build_genesis()
for idx, block_data in enumerate(chain_dump):
if idx == 0:
continue # skip genesis block
block = Block(block_data["index"], block_data["transactions"],
block_data["timestamp"], block_data["previous_hash"],
block_data["nonce"])
proof = block_data['hash']
added = gen_blockchain.add_block(block, proof)
if not added:
raise Exception("The chain dump is tampered")
return gen_blockchain
from flask import Flask, request
import requests
import json
import time
from blockchain import BlockChain
from block import Block
# Initialize flask aplication
app = Flask(__name__)
app.config['JSONIFY_PRETTYPRINT_REGULAR'] = True
#Initialize a blockchain object
blockchain = BlockChain()
blockchain.build_genesis()
# User ID
# TODO add account handling
userID = "miner1337"
# Contains the host addresses of other participating members of the network
peers = set()
@app.route('/new_transaction', methods=['POST'])
def new_transaction():
tx_data = request.get_json()
required_fields = ["sender", "recipient", "amount"]
for field in required_fields:
if not tx_data.get(field):
