def test_blockchain_proof_of_work():
"""test proof of work works correctly"""
block = Block(0, "01-01-2020", "genesis", "", "")
blockchain = BlockChain()
output = blockchain.proof_of_work(block=block)
expected = "00eddca60c19374852bebd291a7ec6baaf3bbeb4bcb4737edca7974150567c3f"
assert output == expected
def test_blockchain_is_valid_proof():
"""test the valid proof function works correctly"""
block = Block(0, "01-01-2020", "genesis", "", "")
blockchain = BlockChain()
blockchain.proof_of_work(block=block)
input_hash = "00eddca60c19374852bebd291a7ec6baaf3bbeb4bcb4737edca7974150567c3f"
output = blockchain.is_valid_proof(block, input_hash)
assert output is True
def test_blockchain_work_mine_result():
"""test the blockchain work flow"""
blockchain = BlockChain() # Start a chain
blockchain.add_new_transaction("claim")
for i in range(1, 7):
blockchain.add_new_transaction(i)
blockchain.mine()
assert blockchain.chain[1].news["mean"] == 3.5
assert blockchain.chain[1].news["value"] == "claim"
def test_blockchain_create_genesis_block():
"""test that blockchain creates the genesis block correctly"""
blockchain = BlockChain()
output = blockchain.chain[0].index
assert output == 0
from pydantic import BaseModel
try:
from src.blockchain import Block, BlockChain
except ImportError:
from blockchain import Block, BlockChain
print("Instantiating node")
node = FastAPI()
print("Generating globally unique address for this node")
NODE_IDENTIFIER = str(uuid4()).replace("-", "")
print(f"This is node ID {NODE_IDENTIFIER}")
print("Instantiating Blockchain for this node")
blockchain = BlockChain()
print("Blockchain up and running!")
class ActiveNode(BaseModel):
nodes: List[str]
@node.get("/")
def root():
"""
Greet info
"""
return {"message": "Welcome to the simplified blockchain news platform"}