def AcceptBlock(block):
bc = Blockchain()
if bc.haveBlock(block.hash):
utils.logg('ProccessBlock() Error - Block %s already exists' %
block.hash)
return False
# Check prev block
if bc._tip != block.prev_block_hash:
utils.logg("Proccess().thisBlock : prev block not found")
return False
# Check timestamp against prev
if bc.getBlock(bc._tip).timestamp >= block.timestamp:
utils.logg("Proccess().thisBlock : block's timestamp is too early")
return False
# Check Proof Of Work
if block.bits != GetNextWorkRequired(ctx.bestBlockHash):
utils.logg("Proccess().thisBlock : incorrect proof of work")
return False
if not bc._block_put(block):
utils.logg("AcceptBlock() : WriteToDisk failed")
return False
utxo_set = UTXOSet(bc)
utxo_set.reindex()
ctx.mapBlockIndex[block.hash] = block
ctx.BestHeight = ctx.BestHeight + 1
ctx.mapBlockHeight[block.hash] = ctx.BestHeight
ctx.bestBlockHash = block.hash
return True
def add_block(msg):
bc = Blockchain()
new_block = Block([], bc._tip, bc.length, msg).pow_of_block()
if new_block:
bc._block_put(new_block)
def loadBlockIndex():
blockchain = Blockchain()
utils.logg('Loading BlockIndex')
#
# Load block index
#
for block in reversed(list(blockchain.blocks)):
# add to index
ctx.mapBlockIndex[block.hash] = block
ctx.BestHeight = ctx.BestHeight + 1
ctx.bestBlockHash = block.hash
ctx.mapBlockHeight[block.hash] = ctx.BestHeight
#
# Init with genesis block
#
if len(ctx.mapBlockIndex) == 0:
txnew = Transaction()
# Transaction
# inputs
txnew.vin[0].tx_id = ''
txnew.vin[0].vout = -1
txnew.vin[
0].public_key = 'The Times 03/Jan/2009 Chancellor on brink of second bailout for banks'
# output
txnew.vout[0].value = 50 * COIN
txnew.vout[0].address = '1F6kc25HfrXcn9b4brsNzCiTDWuqsDzAmx'
txnew.set_id()
# Transaction(id='12c86ae42baf87e9186cd2fabae575e5534ee0bb82a61a8d0d5616d3ec9bf029',
# vin=[TXInput(tx_id=b'', vout=-1, signature=None, public_key='The Times 03/Jan/2009 Chancellor on brink of second bailout for banks')],
# vout=[TXOutput(address='1F6kc25HfrXcn9b4brsNzCiTDWuqsDzAmx', value=5000000000, public_key_hash='9aa83d479c33c697cd727fc87d753d2d7f2daf19')])
# Block
block = Block([txnew])
block.prev_block_hash = ''
block.timestamp = 1607965519
block.bits = 0x1e0fffff
block.nonce = 1484712
#Block(timestamp=b'1607965519', tx_lst=[Transaction(id='12c86ae42baf87e9186cd2fabae575e5534ee0bb82a61a8d0d5616d3ec9bf029',
#vin=[TXInput(tx_id=b'', vout=-1, signature=None, public_key='The Times 03/Jan/2009 Chancellor on brink of second bailout for banks')],
#vout=[TXOutput(address='1F6kc25HfrXcn9b4brsNzCiTDWuqsDzAmx', value=5000000000, public_key_hash='9aa83d479c33c697cd727fc87d753d2d7f2daf19')])],
#prev_block_hash=b'', hash=None, nonce=1484712, bits=504365055)
assert (
block.getHash() ==
'0000054bd29593ff231e77f7005a9e288e162bbda8cb8962077d57d9be8f87c0')
blockchain._block_put(block)
utxo_set = UTXOSet(blockchain)
utxo_set.reindex()
utils.logg('Genesis block added to database')
# add to index
ctx.mapBlockIndex[block.hash] = block
ctx.mapBlockHeight[block.hash] = 1
ctx.BestHeight = ctx.BestHeight + 1
ctx.bestBlockHash = block.hash
# Miner
'''
target = utils.bits2target(block.bits)
i = 0
while 1:
block.nonce = i
hash_hex = block.getHash()
hash_int = int(hash_hex, 16)
if hash_int < target:
print (hash_hex, block.nonce, block.timestamp)
i +=1
'''
return True
