def start_sequencer(self):
# integrity_status = self.integrity_checks()
self.db_session.commit()
block_nr = None
integrity_head = Status.get_status(self.db_session, 'INTEGRITY_HEAD')
if not integrity_head.value:
integrity_head.value = 0
# 3. Check sequence head
sequencer_head = self.db_session.query(func.max(
BlockTotal.id)).one()[0]
if sequencer_head is None:
sequencer_head = -1
# Start sequencing process
sequencer_parent_block = BlockTotal.query(
self.db_session).filter_by(id=sequencer_head).first()
parent_block = Block.query(
self.db_session).filter_by(id=sequencer_head).first()
for block_nr in range(sequencer_head + 1,
int(integrity_head.value) + 1):
if block_nr == 0:
# No block ever sequenced, check if chain is at genesis state
assert (not sequencer_parent_block)
block = Block.query(self.db_session).order_by('id').first()
if not block:
self.db_session.commit()
return {'error': 'Chain not at genesis'}
if block.id == 1:
# Add genesis block
block = self.add_block(block.parent_hash)
if block.id != 0:
self.db_session.commit()
return {'error': 'Chain not at genesis'}
self.process_genesis(block)
sequencer_parent_block_data = None
parent_block_data = None
else:
block_id = sequencer_parent_block.id + 1
assert (block_id == block_nr)
block = Block.query(self.db_session).get(block_nr)
if not block:
self.db_session.commit()
return {
'result':
'Finished at #{}'.format(sequencer_parent_block.id)
}
sequencer_parent_block_data = sequencer_parent_block.asdict()
parent_block_data = parent_block.asdict()
sequenced_block = self.sequence_block(block, parent_block_data,
sequencer_parent_block_data)
self.db_session.commit()
parent_block = block
sequencer_parent_block = sequenced_block
if block_nr:
return {'result': 'Finished at #{}'.format(block_nr)}
else:
return {'result': 'Nothing to sequence'}
def get_query(self):
return BlockTotal.query(self.session).order_by(BlockTotal.id.desc())
def on_post(self, req, resp):
block_hash = None
if 'block_id' in req.media:
block = Block.query(self.session).filter(
Block.id == req.media.get('block_id')).first()
elif req.media.get('block_hash'):
block_hash = req.media.get('block_hash')
block = Block.query(
self.session).filter(Block.hash == block_hash).first()
else:
block = None
resp.status = falcon.HTTP_BAD_REQUEST
resp.media = {
'errors': ['Either block_hash or block_id should be supplied']
}
if block:
print('Sequencing #{} ...'.format(block.id))
harvester = PolkascanHarvesterService(
db_session=self.session,
type_registry=TYPE_REGISTRY,
type_registry_file=TYPE_REGISTRY_FILE)
if block.id == 1:
# Add genesis block
parent_block = harvester.add_block(block.parent_hash)
block_total = BlockTotal.query(
self.session).filter_by(id=block.id).first()
parent_block = Block.query(
self.session).filter(Block.id == block.id - 1).first()
parent_block_total = BlockTotal.query(
self.session).filter_by(id=block.id - 1).first()
if block_total:
resp.status = falcon.HTTP_200
resp.media = {'result': 'already exists', 'blockId': block.id}
else:
if parent_block_total:
parent_block_total = parent_block_total.asdict()
if parent_block:
parent_block = parent_block.asdict()
harvester.sequence_block(block, parent_block,
parent_block_total)
self.session.commit()
resp.status = falcon.HTTP_201
resp.media = {
'result': 'added',
'parentHash': block.parent_hash
}
else:
resp.status = falcon.HTTP_404
resp.media = {'result': 'Block not found'}
def get_item(self, item_id):
return BlockTotal.query(self.session).get(item_id)
def on_post(self, req, resp):
blockHash = None
if req.media.get('block_id'):
substrate = SubstrateInterface(url=SUBSTRATE_RPC_URL,
address_type=SUBSTRATE_ADDRESS_TYPE,
type_registry_preset=TYPE_REGISTRY)
blockHash = substrate.get_block_hash(req.media.get('block_id'))
elif req.media.get('block_hash'):
blockHash = req.media.get('block_hash')
else:
resp.status = falcon.HTTP_BAD_REQUEST
resp.media = {
'errors': ['Either blockHash or block_id should be supplied']
}
if blockHash:
resp.status = falcon.HTTP_200
block = Block.query(
self.session).filter(Block.hash == blockHash).first()
blockTotal = BlockTotal.query(
self.session).filter(BlockTotal.id == block.id).first()
author = ss58_encode(
blockTotal.author.replace('0x', '')
) if blockTotal is not None and blockTotal.author is not None else None
if block:
blockInfo = {}
blockInfo["timestamp"] = block.datetime.strftime(
"%Y-%m-%d %H:%M:%S")
blockInfo["block_hash"] = block.hash
blockInfo["block_id"] = block.id
blockInfo["parent_id"] = block.id - 1 if block.id > 0 else 0
blockInfo["child_id"] = block.id + 1
blockInfo["parent_hash"] = block.parent_hash
blockInfo["state_root"] = block.state_root
blockInfo["extrinsic_root"] = block.extrinsics_root
blockInfo["validator"] = author
blockInfo["count_extrinsic"] = block.count_extrinsics
blockInfo["count_event"] = block.count_events
blockInfo["count_log"] = block.count_log
# blockInfo["age"] = time.mktime(block.datetime.timetuple())
blockInfo["age"] = block.datetime.strftime("%Y-%m-%d %H:%M:%S")
# 获取和区块相关的交易信息
extrinsics = Extrinsic.query(
self.session).filter(Extrinsic.block_id == block.id).all()
extrinsicsObj = [
{
"extrinsic_id":
'{}-{}'.format(block.id, extrinsic.extrinsic_idx),
"hash":
extrinsic.extrinsic_hash
if extrinsic.extrinsic_hash else None,
# "age": time.mktime(block.datetime.timetuple()),
"age":
block.datetime.strftime("%Y-%m-%d %H:%M:%S"),
"result":
extrinsic.success,
# "address": extrinsic.address if extrinsic.address else None,
# "module": extrinsic.module_id,
# "fee": None,
# "nonce": extrinsic.nonce if extrinsic.nonce else None,
# "call": extrinsic.call_id,
"operation":
'{}({})'.format(extrinsic.module_id,
extrinsic.call_id),
"params":
extrinsic.params
# "signature": extrinsic.signature if extrinsic.signature else None
} for extrinsic in extrinsics
]
# 获取和区块相关的日志信息
logs = Log.query(
self.session).filter(Log.block_id == block.id).all()
logsObj = [{
"log_id": '{}-{}'.format(block.id, log.log_idx),
"block_id": block.id,
"type": log.type,
"data": log.data['value']
} for log in logs]
# 获取和区块相关的事件信息
events = Event.query(
self.session).filter(Event.block_id == block.id).all()
eventObj = [{
"id":
'{}-{}'.format(block.id, event.event_idx),
"block_id":
block.id,
"block_hash":
block.hash,
"module_id":
event.module_id,
"event_id":
event.event_id,
"attributes":
event.attributes,
"operation":
'{}({})'.format(event.module_id, event.event_id),
"desc":
self.getEventDesc(event.module_id, event.event_id),
"hash":
self.getEventHash(block.id, event.extrinsic_idx)
} for event in events]
resp.media = {
'status': 'success',
'data': {
"block_info": blockInfo,
"extrinsics": extrinsicsObj,
"logs": logsObj,
"events": eventObj
}
}
else:
resp.status = falcon.HTTP_404
resp.media = {'result': 'Block not found'}