def broadcast_block(): # pylint: disable=unused-variable
"""
Broadcasts a new block to all the nodes
Returns a status message
Methods
-----
POST
Parameters
-----
block : Block as hex
Returns application/json
-----
Return code : 201, 400, 409, 500
Response :
message : str
"""
values = request.get_json()
if not values:
response = {"message": "No data found."}
return jsonify(response), 400
if "block" not in values:
response = {"message": "Some data is missing."}
return jsonify(response), 400
block = Block.ParseFromHex(values["block"])
if block.index == blockchain.last_block.index + 1:
added, message = blockchain.add_block(block)
if added:
response = {"message": "Block added"}
return jsonify(response), 201
response = {"message": "Block seems invalid: " + message}
return jsonify(response), 500
if block.index > blockchain.last_block.index:
response = {
"message":
"Incoming block index higher than last block on current chain"
}
return jsonify(response), 500
response = {
"message": "Blockchain seems to be shorter, block not added"
}
return jsonify(response), 409
def test_block_to_protobuf_and_back():
timestamp = datetime.utcfromtimestamp(0)
transactions = []
header = Header(
version=1,
previous_hash="",
timestamp=timestamp,
transaction_merkle_root=get_merkle_root(transactions),
difficulty=4,
nonce=100,
)
block = Block(
index=0,
block_hash="",
size=0,
header=header,
transaction_count=len(transactions),
transactions=transactions,
)
p_block = block.SerializeToHex()
assert p_block == "080010001a00220c080112001a002200280430642800"
og_block = Block.ParseFromHex(p_block)
assert og_block == Block(
index=0,
block_hash="",
size=0,
header=Header(
version=1,
previous_hash="",
timestamp=timestamp,
transaction_merkle_root=get_merkle_root(transactions),
difficulty=4,
nonce=100,
),
transaction_count=len(transactions),
transactions=transactions,
)
def test_block_to_protobuf_and_back_with_transactions():
timestamp = datetime.utcfromtimestamp(0)
transactions = [
FinalTransaction(
transaction_hash="tx_hash_1",
transaction_id="tx_hash_1",
signed_transaction=SignedRawTransaction(
details=Details(
sender="test",
recipient="test2",
amount=4.5,
nonce=0,
timestamp=timestamp,
public_key="pub_key",
),
signature="sig",
),
)
]
header = Header(
version=1,
previous_hash="",
timestamp=timestamp,
transaction_merkle_root=get_merkle_root(
[t.signed_transaction for t in transactions]),
difficulty=4,
nonce=100,
)
block = Block(
index=0,
block_hash="",
size=0,
header=header,
transaction_count=len(transactions),
transactions=[t.transaction_hash for t in transactions],
)
p_block = block.SerializeToHex()
assert (
p_block ==
"080010001a002260080112001a543061323330613034373436353733373431323035373436353733373433323139303030303030303030303030313234303230303032613030333230373730373536323566366236353739313230333733363936372200280430642801320974785f686173685f31" # noqa: E501
)
og_block = Block.ParseFromHex(p_block)
assert og_block == Block(
index=0,
block_hash="",
size=0,
header=Header(
version=1,
previous_hash="",
timestamp=timestamp,
transaction_merkle_root=get_merkle_root(
[t.signed_transaction for t in transactions]),
difficulty=4,
nonce=100,
),
transaction_count=len(transactions),
transactions=[t.transaction_hash for t in transactions],
)
