Add block "chains" (ex. parent->child mergable blocks)
This commit is contained in:
Arinerron
parent
8846dcc2c6
commit
cdb199e74d
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@ -81,8 +81,8 @@ class API:
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logger.debug('Your web password (KEEP SECRET): ' + logger.colors.underline + self.clientToken)
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if not debug and not self._developmentMode:
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hostNums = [random.randint(1, 255), random.randint(1, 255), random.randint(1, 255)]
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self.host = '127.' + str(hostNums[0]) + '.' + str(hostNums[1]) + '.' + str(hostNums[2])
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hostOctets = [127, random.randint(0x02, 0xFF), random.randint(0x02, 0xFF), random.randint(0x02, 0xFF)]
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self.host = '.'.join(hostOctets)
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else:
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self.host = '127.0.0.1'
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@ -655,7 +655,7 @@ class Core:
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conn.close()
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return True
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def insertBlock(self, data, header='txt', sign=False):
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def insertBlock(self, data, header='txt', sign=False, metadata = {}):
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'''
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Inserts a block into the network
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'''
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@ -688,7 +688,11 @@ class Core:
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data = data.encode()
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retData = ''
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metadata = {'type': header, 'powHash': powHash, 'powToken': powToken}
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metadata['type'] = header
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metadata['powHash'] = powHash
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metadata['powToken'] = powToken
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sig = {}
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metadata = json.dumps(metadata)
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@ -57,6 +57,7 @@ class Block:
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self.signature = None
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self.signedData = None
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self.blockFile = None
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self.parent = None
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self.bheader = {}
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self.bmetadata = {}
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@ -110,6 +111,7 @@ class Block:
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self.bheader = json.loads(self.getRaw()[:self.getRaw().index('\n')])
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self.bcontent = self.getRaw()[self.getRaw().index('\n') + 1:]
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self.bmetadata = json.loads(self.getHeader('meta'))
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self.parent = (None if not 'parent' in self.getMetadata() else Block(self.getMetadata('parent')))
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self.btype = self.getMetadata('type')
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self.powHash = self.getMetadata('powHash')
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self.powToken = self.getMetadata('powToken')
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@ -162,7 +164,7 @@ class Block:
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blockFile.write(self.getRaw().encode())
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self.update()
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else:
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self.hash = self.getCore().insertBlock(self.getContent(), header = self.getType(), sign = sign)
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self.hash = self.getCore().insertBlock(self.getContent(), header = self.getType(), sign = sign, metadata = self.getMetadata())
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self.update()
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return self.getHash()
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else:
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@ -226,8 +228,7 @@ class Block:
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if not key is None:
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return self.getHeader()[key]
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else:
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return self.bheader
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return self.bheader
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def getMetadata(self, key = None):
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'''
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@ -242,8 +243,7 @@ class Block:
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if not key is None:
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return self.getMetadata()[key]
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else:
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return self.bmetadata
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return self.bmetadata
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def getContent(self):
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'''
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@ -254,6 +254,16 @@ class Block:
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'''
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return str(self.bcontent)
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def getParent(self):
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'''
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Returns the Block's parent Block, or None
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Outputs:
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- (Block): the Block's parent
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'''
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return self.parent
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def getDate(self):
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'''
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@ -345,11 +355,31 @@ class Block:
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- btype (str): the type of block to be set to
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Outputs:
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- (Block): the block instance
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- (Block): the Block instance
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'''
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self.btype = btype
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return self
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def setMetadata(self, key, val):
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'''
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Sets a custom metadata value
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Metadata should not store block-specific data structures.
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Inputs:
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- key (str): the key
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- val: the value (type is irrelevant)
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Outputs:
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- (Block): the Block instance
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'''
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if key == 'parent' and (not val is None) and (not val == self.getParent().getHash()):
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self.setParent(val)
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else:
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self.bmetadata[key] = val
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return self
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def setContent(self, bcontent):
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'''
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@ -359,13 +389,31 @@ class Block:
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- bcontent (str): the contents to be set to
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Outputs:
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- (Block): the block instance
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- (Block): the Block instance
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'''
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self.bcontent = str(bcontent)
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return self
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def setParent(self, parent):
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'''
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Sets the Block's parent
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Inputs:
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- parent (Block/str): the Block's parent, to be stored in metadata
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Outputs:
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- (Block): the Block instance
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'''
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if type(parent) == str:
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parent = Block(parent, core = self.getCore())
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self.parent = parent
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self.setMetadata('parent', (None if parent is None else self.getParent().getHash()))
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return self
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# static
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# static functions
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def getBlocks(type = None, signer = None, signed = None, reverse = False, core = None):
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'''
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@ -421,6 +469,66 @@ class Block:
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return list()
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def merge(child, file = None, maximumFollows = 32, core = None):
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'''
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Follows a child Block to its root parent Block, merging content
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Inputs:
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- child (str/Block): the child Block to be followed
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- file (str/file): the file to write the content to, instead of returning it
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- maximumFollows (int): the maximum number of Blocks to follow
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'''
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# validate data and instantiate Core
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core = (core if not core is None else onionrcore.Core())
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maximumFollows = max(0, maximumFollows)
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# type conversions
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if type(child) == str:
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child = Block(child)
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if (not file is None) and (type(file) == str):
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file = open(file, 'ab')
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# only store hashes to avoid intensive memory usage
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blocks = [child.getHash()]
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# generate a list of parent Blocks
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while True:
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# end if the maximum number of follows has been exceeded
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if len(blocks) - 1 >= maximumFollows:
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break
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block = Block(blocks[-1], core = core).getParent()
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# end if there is no parent Block
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if block is None:
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break
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# end if the Block is pointing to a previously parsed Block
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if block.getHash() in blocks:
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break
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# end if the block is not valid
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if not block.isValid():
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break
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blocks.append(block.getHash())
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buffer = ''
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# combine block contents
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for hash in blocks:
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block = Block(hash, core = core)
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contents = block.getContent()
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if file is None:
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buffer += contents
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else:
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file.write(contents)
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return (None if not file is None else buffer)
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def exists(hash):
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'''
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Checks if a block is saved to file or not
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@ -119,7 +119,7 @@ class OnionrTests(unittest.TestCase):
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def testBlockAPI(self):
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logger.debug('-'*26 + '\n')
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logger.info('Running BlockAPI test...')
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logger.info('Running BlockAPI test #1...')
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content = 'Onionr test block'
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@ -133,7 +133,33 @@ class OnionrTests(unittest.TestCase):
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if not block.getContent() == content:
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logger.warn('Test block content is invalid! (%s != %s)' % (block.getContent(), content))
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self.assertTrue(False)
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logger.debug('-'*26 + '\n')
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logger.info('Running BlockAPI test #2...')
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original_content = 'onionr'
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contents = [original_content[i:i+2] for i in range(0, len(original_content), 2)]
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contents.reverse()
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blocks = list()
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parent = None
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for content in contents:
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block = Block('test', content)
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block.setParent(parent)
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parent = block
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print('block "%s": %s' % (content, block.save()))
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blocks.append(block)
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child = blocks[-1]
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merged = Block.merge(child)
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print('merged blocks: %s' % merged)
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if merged != original_content:
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self.assertTrue(False)
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self.assertTrue(True)
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def testBitcoinNode(self):
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@ -253,6 +279,6 @@ class OnionrTests(unittest.TestCase):
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else:
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self.assertTrue(False)
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else:
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self.assertTrue(False)
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self.assertTrue(False) # <- annoying :(
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unittest.main()
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