def _decode_block_pair(placeholder, offset, data):
"""
Decode an incoming block pair message.
:param placeholder:
:param offset: Start of the BlockPair message in the data.
:param data: ByteStream containing the message.
:return: (offset, BlockPairPayload.impl)
"""
if len(data) < offset + block_pack_size * 2:
raise DropPacket("Unable to decode the payload")
try:
new_offset, block1 = TrustChainBlock.unpack(data, offset)
_, block2 = TrustChainBlock.unpack(data, new_offset)
except (IndexError, ValueError):
raise DropPacket("Invalid block contents")
return len(data), placeholder.meta.payload.implement(block1, block2)
def _decode_half_block(placeholder, offset, data):
"""
Decode an incoming half block message.
:param placeholder:
:param offset: Start of the HalfBlock message in the data.
:param data: ByteStream containing the message.
:return: (offset, HalfBlockPayload.impl)
"""
if len(data) < offset + block_pack_size:
raise DropPacket("Unable to decode the payload")
try:
block = TrustChainBlock.unpack(data, offset)
except IndexError:
raise DropPacket("Invalid block contents")
return len(data), placeholder.meta.payload.implement(block)
def test_unpack(self):
block = TrustChainBlock.unpack(
' fish, so sad that it should come to this. - We tried to warn you '
'all but oh dear! - You may not share our intellect, which might explain your '
'disrespect, for all the natural wonders that grow around you. - So long, '
'so long, and thanks for all the fish\x00\x00\x00\na1d2bid1i3')[1]
self.assertEqual(block.transaction, {'id': 3})
self.assertEqual(
block.public_key,
' fish, so sad that it should come to this. - We tried to warn you all but '
)
self.assertEqual(block.sequence_number, 1869095012)
self.assertEqual(
block.link_public_key,
'ear! - You may not share our intellect, which might explain your disrespec'
)
self.assertEqual(block.link_sequence_number, 1949048934)
self.assertEqual(block.previous_hash,
'or all the natural wonders that ')
self.assertEqual(
block.signature,
'grow around you. - So long, so long, and thanks for all the fish')