simple-distributed-cryptographic-ledger-python/web-interface.py at master · Aremu-damilare/simple-distributed-cryptographic-ledger-python · GitHub

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from flask import Flask, jsonify
from .main import Blockchain

# Creating the Web
# App using flask
app = Flask(__name__)


# Create the object
# of the class blockchain
blockchain = Blockchain()

# Mining a new block
@app.route('/mine_block', methods=['GET'])
def mine_block():
	previous_block = blockchain.print_previous_block()
	previous_proof = previous_block['proof']
	proof = blockchain.proof_of_work(previous_proof)
	previous_hash = blockchain.hash(previous_block)
	block = blockchain.create_block(proof, previous_hash)

	response = {'message': 'A block is MINED',
				'index': block['index'],
				'timestamp': block['timestamp'],
				'proof': block['proof'],
				'previous_hash': block['previous_hash']}

	return jsonify(response), 200

# Check validity of blockchain
@app.route('/valid', methods=['GET'])
def valid():
	valid = blockchain.chain_valid(blockchain.chain)

	if valid:
		response = {'message': 'The Blockchain is valid.'}
	else:
		response = {'message': 'The Blockchain is not valid.'}
	return jsonify(response), 200


# Display blockchain in json format
@app.route('/get_chain', methods=['GET'])
def display_chain():
	response = {'chain': blockchain.chain,
				'length': len(blockchain.chain)}
	return jsonify(response), 200


# Run the flask server locally
app.run(host='127.0.0.1', port=5000)