1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 | #!/usr/bin/python
__author__=''' Suraj Singh bisht surajsinghbisht054@gmail.com www.bitforestinfo.com github.com/surajsinghbisht054
'''
# # import modules import json import os from hashlib import sha256 from Crypto.PublicKey import RSA from Crypto.Signature import PKCS1_v1_5 import time
# Simple Request Transection class RequestTransection: def __init__(self): ''' ''' self.category = '' self.sender = '' self.receiver = '' self.amount = '' self.time = str(time.time()) self.fee = '' self.sign = '' self.pubkey = '' self.prvkey = '' self.rsa_key = '' def getitems(self): return { "category" : self.category, "sender" : self.sender, "receiver" : self.receiver, "amount" : self.amount, "fee" : self.fee, "sign" : self.sign, "time" : self.time, } def __repr__(self): return "< Transection {} | {} >".format(self.category, self.time)
def new_user(self): random = RSA.Random.new().read self.rsa_key = RSA.generate(512, random) self.prvkey = self.rsa_key.exportKey() # private key object self.pubkey = self.rsa_key.publickey().exportKey() # public key object self.create_transection("n", '', ) return def create_transection(self, category, sender, receiver, amount, fee): category = category.lower() if category not in ['new', 'send', 'receive']: raise "please use valid categories like new, send or receive" self.category = category self.sender = sender self.receiver = receiver self.amount = amount self.fee = fee return
def previous_block_hash(self, blockitemdict): return sha256("{index}{previoushash}{timestamp}{hash}{datahash}{nonce}{targetbit}".format(**blockitemdict)).hexdigest()
# In[62]:
class RequestBlock: def __init__(self, index, previoushash, targetbit=3, transbuffer = []): self.index = index self.previoushash = previoushash self.timestamp = str(time.time()) self.targetbit = targetbit self.hash = '' self.datahash = '' self.dataload = [] self.nonce = '' self.transbuffer = transbuffer self.calculate_block() def previous_block_hash(self, blockitemdict): return sha256("{index}{previoushash}{timestamp}{hash}{datahash}{nonce}{targetbit}".format(**blockitemdict)).hexdigest()
def merkle_hash(self): hl1 = [] hl2 = [] for data in self.dataload: #print data.getitem() hl1.append(sha256("{category}{sender}{receiver}{amount}{fee}{sign}{time}".format(**data.getitems())).hexdigest()) if not hl1: return sha256('').hexdigest() while True: v1 = '' v2 = '' hl2 = [] if int(len(hl1) % 2)==0 and len(hl1)>1: # Even Number's List for h in hl1: if not v1: v1 = h continue v2 = h hl2.append(sha256(v1+v2).hexdigest()) v1 = '' v2 = '' elif int(len(hl1) % 2)==1 and len(hl1)>1: hl2 = hl1 hl2.append('') elif len(hl1)==1: return hl1[0] else: return False
hl1 = hl2
return False def calculate_block(self): # load transections from Node Buffer self.load_data_from_network_buffer() tmp = self.merkle_hash() if not tmp: print "[Note] No Data load Found" self.datahash = tmp return def load_data_from_network_buffer(self): for trans_req in self.transbuffer: if trans_req not in self.dataload: self.dataload.append(trans_req) return def getitems(self): return { "index" : self.index, "previoushash": self.previoushash, "timestamp" : self.timestamp, "targetbit" : self.targetbit, "hash" : self.hash, "datahash" : self.datahash, "dataload" : [i.getitems() for i in self.dataload], "nonce" : self.nonce, }
class MineBlock: def __init__(self): self.pow = False self.block = '' self.difficulty = 0 def load(self, block): self.block = block self.difficulty = int(self.block.targetbit) self.proof_of_work_number_generator() self.pow = True return def getblock(self): return self.block def getitems(self): return self.block.getitems() def previous_block_hash(self, blockitemdict): return sha256("{index}{previoushash}{timestamp}{hash}{datahash}{nonce}{targetbit}".format(**blockitemdict)).hexdigest() def proof_of_work_number_generator(self): self.block.nonce = 0 while sha256("{}{}{}{}{}".format(self.block.previoushash,self.block.datahash,self.block.timestamp,self.block.targetbit,self.block.nonce)).hexdigest()[:self.difficulty]!='0'*self.difficulty: self.block.nonce+= 1 self.block.hash = sha256("{}{}{}{}{}".format(self.block.previoushash,self.block.datahash,self.block.timestamp,self.block.targetbit,self.block.nonce)).hexdigest() return self.block.nonce
class SimpleBlockChain: def __init__(self, dbname='ChainStore.json'): self.dbname = dbname # Check BlockChain Json Storage File if os.path.exists(self.dbname): self.chain = json.load(open(self.dbname, 'r')) else: self.chain = { "blockchain": [], 'lastupdate': time.time(), } # Check BlockChain Status if not self.check_chain_len(): # Add Genesis Block self.add_genesis_block() # add genesis block request def add_genesis_block(self): print "Add Genesis Block Request" tmpobj = RequestBlock(1,0) mineblock = MineBlock() mineblock.load(tmpobj) self.new_block_request(mineblock.getblock()) return # New Blocking Join Request def new_block_request(self, block): # Verify Block if self.validate_new_block(block): self.chain['blockchain'].append(block.getitems()) pass return # Validate New Block Before Joining It to main Chain def validate_new_block(self, block): return True # Check block chain length def check_chain_len(self): return len(self.chain['blockchain']) def pre_block(self): return self.chain['blockchain'][-1] #return # save updates def close(self): f = open(self.dbname, 'w') self.chain['lastupdate']= time.time() json.dump(self.chain, f, sort_keys=True, indent=4, separators=(',', ': ')) f.close() return if __name__=='__main__': sbc = SimpleBlockChain() trans = RequestTransection() trans.create_transection("send", "123456", "654231", '0', '500') print trans.previous_block_hash(sbc.pre_block())
reqblock = RequestBlock(index=sbc.check_chain_len()+1, previoushash=trans.previous_block_hash(sbc.pre_block()), transbuffer=[trans])
m = MineBlock() m.load(reqblock) sbc.new_block_request(block=m.getblock())
print sbc.chain sbc.close()
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