def mk_test(encoded, execgas, expect):
pre = tester.mk_state_test_prefill(c)
try:
o = x1.foo(
encoded,
startgas=21000 +
intrinsic_gas_of_data(x1.translator.encode('foo', [encoded])) +
execgas)
except tester.TransactionFailed:
o = False
if o is False:
if expect != 'error':
raise Exception('OOG')
elif o == encode_int32(1):
if expect != 'yes':
raise Exception('False positive')
elif o == encode_int32(0):
if expect != 'no':
raise Exception('False negative')
else:
raise Exception("wtf: %r" % o)
o = tester.mk_state_test_postfill(c, pre)
o2 = tester.mk_state_test_postfill(c, pre, filler_mode=True)
assert new_statetest_utils.verify_state_test(o)
return o, o2
def commit(self):
for k, v in self.storage_cache.items():
if v:
self.storage_trie.update(utils.encode_int32(k), rlp.encode(v))
else:
self.storage_trie.delete(utils.encode_int32(k))
self.storage_cache = {}
self.storage = self.storage_trie.root_hash
def mk_ecadd_data(p1, p2):
if isinstance(p1[0], py_pairing.FQ):
p1 = py_pairing.normalize(p1)
p1 = (p1[0].n, p1[1].n)
if isinstance(p2[0], py_pairing.FQ):
p2 = py_pairing.normalize(p2)
p2 = (p2[0].n, p2[1].n)
return encode_int32(p1[0]) + encode_int32(p1[1]) + \
encode_int32(p2[0]) + encode_int32(p2[1])
def mk_prepare(validator_index, epoch, ancestry_hash, source_epoch,
source_ancestry_hash, key):
sighash = utils.sha3(
rlp.encode([
validator_index, epoch, ancestry_hash, source_epoch,
source_ancestry_hash
]))
v, r, s = utils.ecdsa_raw_sign(sighash, key)
sig = utils.encode_int32(v) + utils.encode_int32(r) + utils.encode_int32(s)
return rlp.encode([
validator_index, epoch, ancestry_hash, source_epoch,
source_ancestry_hash, sig
])
def casper_setup_block(chain,
state=None,
timestamp=None,
coinbase=b'\x35' * 20,
extra_data='moo ha ha says the laughing cow.'):
state = state or chain.state
blk = Block(BlockHeader())
now = timestamp or chain.time()
prev_blknumber = call_casper(state, 'getBlockNumber')
blk.header.number = prev_blknumber + 1
blk.header.difficulty = 1
blk.header.gas_limit = call_casper(state, 'getGasLimit')
blk.header.timestamp = max(now, state.prev_headers[0].timestamp + 1)
blk.header.prevhash = apply_const_message(
state,
sender=casper_config['METROPOLIS_ENTRY_POINT'],
to=casper_config['METROPOLIS_BLOCKHASH_STORE'],
data=utils.encode_int32(prev_blknumber))
blk.header.coinbase = coinbase
blk.header.extra_data = extra_data
blk.header.bloom = 0
blk.uncles = []
initialize(state, blk)
for tx in get_dunkle_candidates(chain, state):
assert apply_transaction(state, tx)
blk.transactions.append(tx)
log_bc.info('Block set up with number %d and prevhash %s, %d dunkles' %
(blk.header.number, utils.encode_hex(
blk.header.prevhash), len(blk.transactions)))
return blk
def proc_ecmul(ext, msg):
if not ext.post_metropolis_hardfork():
return 1, msg.gas, []
import py_ecc.optimized_bn128 as bn128
FQ = bn128.FQ
print('ecmul proc', msg.gas)
if msg.gas < opcodes.GECMUL:
return 0, 0, []
x = msg.data.extract32(0)
y = msg.data.extract32(32)
m = msg.data.extract32(64)
p = validate_point(x, y)
if p is False:
return 0, 0, []
o = bn128.normalize(bn128.multiply(p, m))
return (1, msg.gas - opcodes.GECMUL, [
safe_ord(c) for c in (encode_int32(o[0].n) + encode_int32(o[1].n))
])
def proc_ecadd(ext, msg):
if not ext.post_metropolis_hardfork():
return 1, msg.gas, []
import py_ecc.optimized_bn128 as bn128
FQ = bn128.FQ
print('ecadd proc:', msg.gas)
if msg.gas < opcodes.GECADD:
return 0, 0, []
x1 = msg.data.extract32(0)
y1 = msg.data.extract32(32)
x2 = msg.data.extract32(64)
y2 = msg.data.extract32(96)
p1 = validate_point(x1, y1)
p2 = validate_point(x2, y2)
if p1 is False or p2 is False:
return 0, 0, []
o = bn128.normalize(bn128.add(p1, p2))
return 1, msg.gas - \
opcodes.GECADD, [safe_ord(x) for x in (
encode_int32(o[0].n) + encode_int32(o[1].n))]
def mk_ecpairing_data(pts):
o = b''
for p, q in pts:
np, nq = py_pairing.normalize(p), py_pairing.normalize(q)
o += encode_int32(np[0].n) + encode_int32(np[1].n) + \
encode_int32(nq[0].coeffs[1]) + encode_int32(nq[0].coeffs[0]) + \
encode_int32(nq[1].coeffs[1]) + encode_int32(nq[1].coeffs[0])
return o
def vm_execute(ext, msg, code):
# precompute trace flag
# if we trace vm, we're in slow mode anyway
trace_vm = log_vm_op.is_active('trace')
compustate = Compustate(gas=msg.gas)
stk = compustate.stack
mem = compustate.memory
if code in code_cache:
processed_code = code_cache[code]
else:
processed_code = preprocess_code(code)
code_cache[code] = processed_code
# print(processed_code.keys(), code)
codelen = len(code)
s = time.time()
steps = 0
_prevop = None # for trace only
while compustate.pc in processed_code:
ops, minstack, maxstack, totgas, nextpos = processed_code[
compustate.pc]
if len(compustate.stack) < minstack:
return vm_exception('INSUFFICIENT STACK')
if len(compustate.stack) > maxstack:
return vm_exception('STACK SIZE LIMIT EXCEEDED')
if totgas > compustate.gas:
return vm_exception('OUT OF GAS %d %d' % (totgas, compustate.gas))
jumped = False
compustate.gas -= totgas
compustate.pc = nextpos
# Invalid operation; can only come at the end of a chunk
if ops[-1][0] == 'INVALID':
return vm_exception('INVALID OP', opcode=ops[-1][1])
for op, opcode, pushval in ops:
if trace_vm:
"""
This diverges from normal logging, as we use the logging namespace
only to decide which features get logged in 'bible.vm.op'
i.e. tracing can not be activated by activating a sub
like 'bible.vm.op.stack'
"""
trace_data = {}
trace_data['stack'] = list(
map(to_string, list(compustate.stack)))
if _prevop in ('MLOAD', 'MSTORE', 'MSTORE8', 'SHA3', 'CALL',
'CALLCODE', 'CREATE', 'CALLDATACOPY',
'CODECOPY', 'EXTCODECOPY'):
if len(compustate.memory) < 1024:
trace_data['memory'] = \
''.join([encode_hex(ascii_chr(x)) for x
in compustate.memory])
else:
trace_data['sha3memory'] = \
encode_hex(utils.sha3(b''.join([ascii_chr(x) for
x in compustate.memory])))
if _prevop in ('SSTORE', ) or steps == 0:
trace_data['storage'] = ext.log_storage(msg.to)
trace_data['gas'] = to_string(compustate.gas + totgas)
trace_data['inst'] = opcode
trace_data['pc'] = to_string(compustate.pc - 1)
if steps == 0:
trace_data['depth'] = msg.depth
trace_data['address'] = msg.to
trace_data['steps'] = steps
trace_data['depth'] = msg.depth
if op[:4] == 'PUSH':
trace_data['pushvalue'] = pushval
log_vm_op.trace('vm', op=op, **trace_data)
steps += 1
_prevop = op
# Valid operations
# Pushes first because they are very frequent
if 0x60 <= opcode <= 0x7f:
# compustate.pc += opcode - 0x5f # Move 1 byte forward for
# 0x60, up to 32 bytes for 0x7f
stk.append(pushval)
elif opcode < 0x10:
if op == 'STOP':
return peaceful_exit('STOP', compustate.gas, [])
elif op == 'ADD':
stk.append((stk.pop() + stk.pop()) & TT256M1)
elif op == 'SUB':
stk.append((stk.pop() - stk.pop()) & TT256M1)
elif op == 'MUL':
stk.append((stk.pop() * stk.pop()) & TT256M1)
elif op == 'DIV':
s0, s1 = stk.pop(), stk.pop()
stk.append(0 if s1 == 0 else s0 // s1)
elif op == 'MOD':
s0, s1 = stk.pop(), stk.pop()
stk.append(0 if s1 == 0 else s0 % s1)
elif op == 'SDIV':
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(
stk.pop())
stk.append(0 if s1 == 0 else (abs(s0) // abs(s1) *
(-1 if s0 * s1 < 0 else 1))
& TT256M1)
elif op == 'SMOD':
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(
stk.pop())
stk.append(0 if s1 == 0 else (abs(s0) % abs(s1) *
(-1 if s0 < 0 else 1))
& TT256M1)
elif op == 'ADDMOD':
s0, s1, s2 = stk.pop(), stk.pop(), stk.pop()
stk.append((s0 + s1) % s2 if s2 else 0)
elif op == 'MULMOD':
s0, s1, s2 = stk.pop(), stk.pop(), stk.pop()
stk.append((s0 * s1) % s2 if s2 else 0)
elif op == 'EXP':
base, exponent = stk.pop(), stk.pop()
# fee for exponent is dependent on its bytes
# calc n bytes to represent exponent
nbytes = len(utils.encode_int(exponent))
expfee = nbytes * opcodes.GEXPONENTBYTE
if ext.post_clearing_hardfork():
expfee += opcodes.EXP_SUPPLEMENTAL_GAS * nbytes
if compustate.gas < expfee:
compustate.gas = 0
return vm_exception('OOG EXPONENT')
compustate.gas -= expfee
stk.append(pow(base, exponent, TT256))
elif op == 'SIGNEXTEND':
s0, s1 = stk.pop(), stk.pop()
if s0 <= 31:
testbit = s0 * 8 + 7
if s1 & (1 << testbit):
stk.append(s1 | (TT256 - (1 << testbit)))
else:
stk.append(s1 & ((1 << testbit) - 1))
else:
stk.append(s1)
elif opcode < 0x20:
if op == 'LT':
stk.append(1 if stk.pop() < stk.pop() else 0)
elif op == 'GT':
stk.append(1 if stk.pop() > stk.pop() else 0)
elif op == 'SLT':
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(
stk.pop())
stk.append(1 if s0 < s1 else 0)
elif op == 'SGT':
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(
stk.pop())
stk.append(1 if s0 > s1 else 0)
elif op == 'EQ':
stk.append(1 if stk.pop() == stk.pop() else 0)
elif op == 'ISZERO':
stk.append(0 if stk.pop() else 1)
elif op == 'AND':
stk.append(stk.pop() & stk.pop())
elif op == 'OR':
stk.append(stk.pop() | stk.pop())
elif op == 'XOR':
stk.append(stk.pop() ^ stk.pop())
elif op == 'NOT':
stk.append(TT256M1 - stk.pop())
elif op == 'BYTE':
s0, s1 = stk.pop(), stk.pop()
if s0 >= 32:
stk.append(0)
else:
stk.append((s1 // 256**(31 - s0)) % 256)
elif opcode < 0x40:
if op == 'SHA3':
s0, s1 = stk.pop(), stk.pop()
compustate.gas -= opcodes.GSHA3WORD * \
(utils.ceil32(s1) // 32)
if compustate.gas < 0:
return vm_exception('OOG PAYING FOR SHA3')
if not mem_extend(mem, compustate, op, s0, s1):
return vm_exception('OOG EXTENDING MEMORY')
data = bytearray_to_bytestr(mem[s0:s0 + s1])
stk.append(utils.big_endian_to_int(utils.sha3(data)))
elif op == 'ADDRESS':
stk.append(utils.coerce_to_int(msg.to))
elif op == 'BALANCE':
if ext.post_anti_dos_hardfork():
if not eat_gas(compustate,
opcodes.BALANCE_SUPPLEMENTAL_GAS):
return vm_exception("OUT OF GAS")
addr = utils.coerce_addr_to_hex(stk.pop() % 2**160)
stk.append(ext.get_balance(addr))
elif op == 'ORIGIN':
stk.append(utils.coerce_to_int(ext.tx_origin))
elif op == 'CALLER':
stk.append(utils.coerce_to_int(msg.sender))
elif op == 'CALLVALUE':
stk.append(msg.value)
elif op == 'CALLDATALOAD':
stk.append(msg.data.extract32(stk.pop()))
elif op == 'CALLDATASIZE':
stk.append(msg.data.size)
elif op == 'CALLDATACOPY':
mstart, dstart, size = stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, mstart, size):
return vm_exception('OOG EXTENDING MEMORY')
if not data_copy(compustate, size):
return vm_exception('OOG COPY DATA')
msg.data.extract_copy(mem, mstart, dstart, size)
elif op == 'CODESIZE':
stk.append(len(code))
elif op == 'CODECOPY':
mstart, dstart, size = stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, mstart, size):
return vm_exception('OOG EXTENDING MEMORY')
if not data_copy(compustate, size):
return vm_exception('OOG COPY DATA')
for i in range(size):
if dstart + i < len(code):
mem[mstart + i] = utils.safe_ord(code[dstart + i])
else:
mem[mstart + i] = 0
elif op == 'RETURNDATACOPY':
mstart, dstart, size = stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, mstart, size):
return vm_exception('OOG EXTENDING MEMORY')
if not data_copy(compustate, size):
return vm_exception('OOG COPY DATA')
if dstart + size > len(compustate.last_returned):
return vm_exception('RETURNDATACOPY out of range')
mem[mstart:mstart + size] = compustate.last_returned
elif op == 'RETURNDATASIZE':
stk.append(len(compustate.last_returned))
elif op == 'GASPRICE':
stk.append(ext.tx_gasprice)
elif op == 'EXTCODESIZE':
if ext.post_anti_dos_hardfork():
if not eat_gas(compustate,
opcodes.EXTCODELOAD_SUPPLEMENTAL_GAS):
return vm_exception("OUT OF GAS")
addr = utils.coerce_addr_to_hex(stk.pop() % 2**160)
stk.append(len(ext.get_code(addr) or b''))
elif op == 'EXTCODECOPY':
if ext.post_anti_dos_hardfork():
if not eat_gas(compustate,
opcodes.EXTCODELOAD_SUPPLEMENTAL_GAS):
return vm_exception("OUT OF GAS")
addr = utils.coerce_addr_to_hex(stk.pop() % 2**160)
start, s2, size = stk.pop(), stk.pop(), stk.pop()
extcode = ext.get_code(addr) or b''
assert utils.is_string(extcode)
if not mem_extend(mem, compustate, op, start, size):
return vm_exception('OOG EXTENDING MEMORY')
if not data_copy(compustate, size):
return vm_exception('OOG COPY DATA')
for i in range(size):
if s2 + i < len(extcode):
mem[start + i] = utils.safe_ord(extcode[s2 + i])
else:
mem[start + i] = 0
elif opcode < 0x50:
if op == 'BLOCKHASH':
if ext.post_metropolis_hardfork() and False:
bh_addr = ext.blockhash_store
stk.append(ext.get_storage_data(bh_addr, stk.pop()))
else:
stk.append(
utils.big_endian_to_int(ext.block_hash(stk.pop())))
elif op == 'COINBASE':
stk.append(utils.big_endian_to_int(ext.block_coinbase))
elif op == 'TIMESTAMP':
stk.append(ext.block_timestamp)
elif op == 'NUMBER':
stk.append(ext.block_number)
elif op == 'DIFFICULTY':
stk.append(ext.block_difficulty)
elif op == 'GASLIMIT':
stk.append(ext.block_gas_limit)
elif opcode < 0x60:
if op == 'POP':
stk.pop()
elif op == 'MLOAD':
s0 = stk.pop()
if not mem_extend(mem, compustate, op, s0, 32):
return vm_exception('OOG EXTENDING MEMORY')
stk.append(utils.bytes_to_int(mem[s0:s0 + 32]))
elif op == 'MSTORE':
s0, s1 = stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, s0, 32):
return vm_exception('OOG EXTENDING MEMORY')
mem[s0:s0 + 32] = utils.encode_int32(s1)
elif op == 'MSTORE8':
s0, s1 = stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, s0, 1):
return vm_exception('OOG EXTENDING MEMORY')
mem[s0] = s1 % 256
elif op == 'SLOAD':
if ext.post_anti_dos_hardfork():
if not eat_gas(compustate,
opcodes.SLOAD_SUPPLEMENTAL_GAS):
return vm_exception("OUT OF GAS")
stk.append(ext.get_storage_data(msg.to, stk.pop()))
elif op == 'SSTORE':
s0, s1 = stk.pop(), stk.pop()
if msg.static:
return vm_exception(
'Cannot SSTORE inside a static context')
if ext.get_storage_data(msg.to, s0):
gascost = opcodes.GSTORAGEMOD if s1 else opcodes.GSTORAGEKILL
refund = 0 if s1 else opcodes.GSTORAGEREFUND
else:
gascost = opcodes.GSTORAGEADD if s1 else opcodes.GSTORAGEMOD
refund = 0
if compustate.gas < gascost:
return vm_exception('OUT OF GAS')
compustate.gas -= gascost
# adds neg gascost as a refund if below zero
ext.add_refund(refund)
ext.set_storage_data(msg.to, s0, s1)
elif op == 'JUMP':
compustate.pc = stk.pop()
opnew = code[
compustate.pc] if compustate.pc < codelen else 0
jumped = True
if opnew != JUMPDEST:
return vm_exception('BAD JUMPDEST')
elif op == 'JUMPI':
s0, s1 = stk.pop(), stk.pop()
if s1:
compustate.pc = s0
opnew = code[
compustate.pc] if compustate.pc < codelen else 0
jumped = True
if opnew != JUMPDEST:
return vm_exception('BAD JUMPDEST')
elif op == 'PC':
stk.append(compustate.pc - 1)
elif op == 'MSIZE':
stk.append(len(mem))
elif op == 'GAS':
stk.append(compustate.gas) # AFTER subtracting cost 1
elif op[:3] == 'DUP':
# 0x7f - opcode is a negative number, -1 for 0x80 ... -16 for
# 0x8f
stk.append(stk[0x7f - opcode])
elif op[:4] == 'SWAP':
# 0x8e - opcode is a negative number, -2 for 0x90 ... -17 for
# 0x9f
temp = stk[0x8e - opcode]
stk[0x8e - opcode] = stk[-1]
stk[-1] = temp
elif op[:3] == 'LOG':
"""
0xa0 ... 0xa4, 32/64/96/128/160 + len(data) gas
a. Opcodes LOG0...LOG4 are added, takes 2-6 stack arguments
MEMSTART MEMSZ (TOPIC1) (TOPIC2) (TOPIC3) (TOPIC4)
b. Logs are kept track of during tx execution exactly the same way as suicides
(except as an ordered list, not a set).
Each log is in the form [address, [topic1, ... ], data] where:
* address is what the ADDRESS opcode would output
* data is mem[MEMSTART: MEMSTART + MEMSZ]
* topics are as provided by the opcode
c. The ordered list of logs in the transaction are expressed as [log0, log1, ..., logN].
"""
depth = int(op[3:])
mstart, msz = stk.pop(), stk.pop()
topics = [stk.pop() for x in range(depth)]
compustate.gas -= msz * opcodes.GLOGBYTE
if msg.static:
return vm_exception('Cannot LOG inside a static context')
if not mem_extend(mem, compustate, op, mstart, msz):
return vm_exception('OOG EXTENDING MEMORY')
data = bytearray_to_bytestr(mem[mstart:mstart + msz])
ext.log(msg.to, topics, data)
log_log.trace('LOG',
to=msg.to,
topics=topics,
data=list(map(utils.safe_ord, data)))
# print('LOG', msg.to, topics, list(map(ord, data)))
elif op == 'CREATE':
value, mstart, msz = stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, mstart, msz):
return vm_exception('OOG EXTENDING MEMORY')
if msg.static:
return vm_exception(
'Cannot CREATE inside a static context')
if ext.get_balance(msg.to) >= value and msg.depth < MAX_DEPTH:
cd = CallData(mem, mstart, msz)
ingas = compustate.gas
if ext.post_anti_dos_hardfork():
ingas = all_but_1n(ingas,
opcodes.CALL_CHILD_LIMIT_DENOM)
create_msg = Message(msg.to, b'', value, ingas, cd,
msg.depth + 1)
o, gas, addr = ext.create(create_msg)
if o:
stk.append(utils.coerce_to_int(addr))
else:
stk.append(0)
compustate.gas = compustate.gas - ingas + gas
else:
stk.append(0)
elif op in ('CALL', 'CALLCODE', 'DELEGATECALL', 'STATICCALL'):
# Pull arguments from the stack
if op in ('CALL', 'CALLCODE'):
gas, to, value, meminstart, meminsz, memoutstart, memoutsz = \
stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop()
else:
gas, to, meminstart, meminsz, memoutstart, memoutsz = \
stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop()
value = 0
# Static context prohibition
if msg.static and value > 0:
return vm_exception(
'Cannot make a non-zero-value call inside a static context'
)
# Expand memory
if not mem_extend(mem, compustate, op, meminstart, meminsz) or \
not mem_extend(mem, compustate, op, memoutstart, memoutsz):
return vm_exception('OOG EXTENDING MEMORY')
to = utils.int_to_addr(to)
# Extra gas costs based on hard fork-dependent factors
extra_gas = (not ext.account_exists(to)) * (op == 'CALL') * (value > 0 or not ext.post_clearing_hardfork()) * opcodes.GCALLNEWACCOUNT + \
(value > 0) * opcodes.GCALLVALUETRANSFER + \
ext.post_anti_dos_hardfork() * opcodes.CALL_SUPPLEMENTAL_GAS
# Compute child gas limit
if ext.post_anti_dos_hardfork():
if compustate.gas < extra_gas:
return vm_exception('OUT OF GAS', needed=extra_gas)
gas = min(
gas,
all_but_1n(compustate.gas - extra_gas,
opcodes.CALL_CHILD_LIMIT_DENOM))
else:
if compustate.gas < gas + extra_gas:
return vm_exception('OUT OF GAS',
needed=gas + extra_gas)
submsg_gas = gas + opcodes.GSTIPEND * (value > 0)
# Verify that there is sufficient balance and depth
if ext.get_balance(msg.to) < value or msg.depth >= MAX_DEPTH:
compustate.gas -= (gas + extra_gas - submsg_gas)
stk.append(0)
else:
# Subtract gas from parent
compustate.gas -= (gas + extra_gas)
assert compustate.gas >= 0
cd = CallData(mem, meminstart, meminsz)
# Generate the message
if op == 'CALL':
call_msg = Message(msg.to,
to,
value,
submsg_gas,
cd,
msg.depth + 1,
code_address=to,
static=msg.static)
elif ext.post_homestead_hardfork(
) and op == 'DELEGATECALL':
call_msg = Message(msg.sender,
msg.to,
msg.value,
submsg_gas,
cd,
msg.depth + 1,
code_address=to,
transfers_value=False,
static=msg.static)
elif op == 'DELEGATECALL':
return vm_exception('OPCODE INACTIVE')
elif op == 'CALLCODE':
call_msg = Message(msg.to,
msg.to,
value,
submsg_gas,
cd,
msg.depth + 1,
code_address=to,
static=msg.static)
elif op == 'STATICCALL':
call_msg = Message(msg.to,
to,
value,
submsg_gas,
cd,
msg.depth + 1,
code_address=to,
static=True)
else:
raise Exception("Lolwut")
# Get result
result, gas, data = ext.msg(call_msg)
if result == 0:
stk.append(0)
else:
stk.append(1)
# Set output memory
for i in range(min(len(data), memoutsz)):
mem[memoutstart + i] = data[i]
compustate.gas += gas
compustate.last_returned = bytearray(data)
elif op == 'RETURN':
s0, s1 = stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, s0, s1):
return vm_exception('OOG EXTENDING MEMORY')
return peaceful_exit('RETURN', compustate.gas, mem[s0:s0 + s1])
elif op == 'REVERT':
if not ext.post_metropolis_hardfork():
return vm_exception('Opcode not yet enabled')
s0, s1 = stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, s0, s1):
return vm_exception('OOG EXTENDING MEMORY')
return revert(compustate.gas, mem[s0:s0 + s1])
elif op == 'SUICIDE':
if msg.static:
return vm_exception(
'Cannot SUICIDE inside a static context')
to = utils.encode_int(stk.pop())
to = ((b'\x00' * (32 - len(to))) + to)[12:]
xfer = ext.get_balance(msg.to)
if ext.post_anti_dos_hardfork():
extra_gas = opcodes.SUICIDE_SUPPLEMENTAL_GAS + \
(not ext.account_exists(
to)) * (xfer > 0 or not ext.post_clearing_hardfork()) * opcodes.GCALLNEWACCOUNT
if not eat_gas(compustate, extra_gas):
return vm_exception("OUT OF GAS")
ext.set_balance(to, ext.get_balance(to) + xfer)
ext.set_balance(msg.to, 0)
ext.add_suicide(msg.to)
log_msg.debug('SUICIDING',
addr=utils.checksum_encode(msg.to),
to=utils.checksum_encode(to),
xferring=xfer)
return 1, compustate.gas, []
# assert utils.is_numeric(compustate.gas)
# this is slow!
# for a in stk:
# assert is_numeric(a), (op, stk)
# assert a >= 0 and a < 2**256, (a, op, stk)
# if not jumped:
# assert compustate.pc == nextpos
# compustate.pc = nextpos
if compustate.pc >= codelen:
return peaceful_exit('CODE OUT OF RANGE', compustate.gas, [])
return vm_exception('INVALID JUMP')
def mk_logout(validator_index, epoch, key):
sighash = utils.sha3(rlp.encode([validator_index, epoch]))
v, r, s = utils.ecdsa_raw_sign(sighash, key)
sig = utils.encode_int32(v) + utils.encode_int32(r) + utils.encode_int32(s)
return rlp.encode([validator_index, epoch, sig])
# casper.initialize_epoch(3)
assert casper.get_total_curdyn_deposits() == 200 * 10**18
assert casper.get_total_prevdyn_deposits() == 0
_e, _a, _se, _sa = \
casper.get_current_epoch(), casper.get_recommended_ancestry_hash(), \
casper.get_recommended_source_epoch(), casper.get_recommended_source_ancestry_hash()
print("Penalty factor: %.8f" % (casper.get_current_penalty_factor()))
# Send a prepare message
print('pre deposit', casper.get_deposit_size(0),
casper.get_total_curdyn_deposits())
assert casper.get_deposit_size(0) == casper.get_total_curdyn_deposits()
casper.prepare(mk_prepare(0, _e, _a, _se, _sa, t.k1))
print('Gas consumed for a prepare: %d' % c.last_gas_used(with_tx=True))
sourcing_hash = utils.sha3(
utils.encode_int32(_e) + _a + utils.encode_int32(_se) + _sa)
assert casper.get_consensus_messages__ancestry_hash_justified(_e, _a)
assert casper.get_main_hash_justified()
print("Prepare message processed")
try:
casper.prepare(
mk_prepare(0, 1, b'\x35' * 32, b'\x00' * 32, 0, b'\x00' * 32, t.k0))
success = True
except:
success = False
assert not success
print("Prepare message fails the second time")
# Send a commit message
casper.commit(mk_commit(0, _e, _a, 0, t.k1))
print('post deposit', casper.get_deposit_size(0))
print('Gas consumed for a commit: %d' % c.last_gas_used(with_tx=True))
def mk_modexp_data(b, e, m):
benc = int_to_big_endian(b)
eenc = int_to_big_endian(e)
menc = int_to_big_endian(m)
return encode_int32(len(benc)) + encode_int32(len(eenc)) + \
encode_int32(len(menc)) + benc + eenc + menc
def make_withdrawal_signature(key):
h = sha3(b'withdrawwithdrawwithdrawwithdraw')
v, r, s = ecsign(h, key)
return encode_int32(v) + encode_int32(r) + encode_int32(s)
def perturb(inp, pos, by):
return inp[:pos] + \
encode_int32(big_endian_to_int(
inp[pos: pos + 32]) + by) + inp[pos + 32:]
def get_storage_data(self, key):
if key not in self.storage_cache:
v = self.storage_trie.get(utils.encode_int32(key))
self.storage_cache[key] = utils.big_endian_to_int(
rlp.decode(v) if v else b'')
return self.storage_cache[key]
def mk_ecmul_data(p1, m):
if isinstance(p1[0], py_pairing.FQ):
p1 = py_pairing.normalize(p1)
p1 = (p1[0].n, p1[1].n)
return encode_int32(p1[0]) + encode_int32(p1[1]) + encode_int32(m)
