def bloom_bits(val):
h = utils.sha3(val)
return [
bits_in_number(1 << ((safe_ord(h[i + 1]) +
(safe_ord(h[i]) << 8)) & 2047))
for i in range(0, BUCKETS_PER_VAL * 2, 2)
]
def proc_ecrecover(ext, msg):
# print('ecrecover proc', msg.gas)
OP_GAS = opcodes.GECRECOVER
gas_cost = OP_GAS
if msg.gas < gas_cost:
return 0, 0, []
message_hash_bytes = [0] * 32
msg.data.extract_copy(message_hash_bytes, 0, 0, 32)
message_hash = b''.join(map(ascii_chr, message_hash_bytes))
# TODO: This conversion isn't really necessary.
# TODO: Invesitage if the check below is really needed.
v = msg.data.extract32(32)
r = msg.data.extract32(64)
s = msg.data.extract32(96)
if r >= secp256k1n or s >= secp256k1n or v < 27 or v > 28:
return 1, msg.gas - opcodes.GECRECOVER, []
try:
pub = utils.ecrecover_to_pub(message_hash, v, r, s)
except Exception as e:
return 1, msg.gas - gas_cost, []
o = [0] * 12 + [safe_ord(x) for x in utils.sha3(pub)[-20:]]
return 1, msg.gas - gas_cost, o
def consume_length_prefix(rlp, start):
"""Read a length prefix from an RLP string.
:param rlp: the rlp string to read from
:param start: the position at which to start reading
:returns: a tuple ``(type, length, end)``, where ``type`` is either ``str``
or ``list`` depending on the type of the following payload,
``length`` is the length of the payload in bytes, and ``end`` is
the position of the first payload byte in the rlp string
"""
b0 = safe_ord(rlp[start])
if b0 < 128: # single byte
return (str, 1, start)
elif b0 < 128 + 56: # short string
return (str, b0 - 128, start + 1)
elif b0 < 192: # long string
ll = b0 - 128 - 56 + 1
l = big_endian_to_int(rlp[start + 1:start + 1 + ll])
return (str, l, start + 1 + ll)
elif b0 < 192 + 56: # short list
return (list, b0 - 192, start + 1)
else: # long list
ll = b0 - 192 - 56 + 1
l = big_endian_to_int(rlp[start + 1:start + 1 + ll])
return (list, l, start + 1 + ll)
def optimized_decode_single(x, pos):
z = safe_ord(x[pos])
if z < 128:
return x[pos:pos + 1], 1
elif z < 184:
return x[pos + 1:pos + z - 127], z - 127
else:
ll = big_endian_to_int(x[pos + 1:pos + z - 182])
return x[pos + z - 182:pos + z - 182 + ll], z - 182 + ll
def proc_ripemd160(ext, msg):
# print('ripemd160 proc', msg.gas)
OP_GAS = opcodes.GRIPEMD160BASE + \
(utils.ceil32(msg.data.size) // 32) * opcodes.GRIPEMD160WORD
gas_cost = OP_GAS
if msg.gas < gas_cost:
return 0, 0, []
d = msg.data.extract_all()
o = [0] * 12 + [safe_ord(x) for x in hashlib.new('ripemd160', d).digest()]
return 1, msg.gas - gas_cost, o
def proc_sha256(ext, msg):
# print('sha256 proc', msg.gas)
OP_GAS = opcodes.GSHA256BASE + \
(utils.ceil32(msg.data.size) // 32) * opcodes.GSHA256WORD
gas_cost = OP_GAS
if msg.gas < gas_cost:
return 0, 0, []
d = msg.data.extract_all()
o = [safe_ord(x) for x in hashlib.sha256(d).digest()]
return 1, msg.gas - gas_cost, o
def call_casper(state, fun, args=[], gas=1000000, value=0):
ct = get_casper_ct()
abidata = vm.CallData([utils.safe_ord(x) for x in ct.encode(fun, args)])
msg = vm.Message(casper_config['METROPOLIS_ENTRY_POINT'],
casper_config['CASPER_ADDR'], value, gas, abidata)
o = apply_const_message(state, msg)
if o:
# print 'cc', fun, args, ct.decode(fun, o)[0]
return ct.decode(fun, o)[0]
else:
return None
def preprocess_code(code):
o = 0
i = 0
pushcache = {}
code = code + b'\x00' * 32
while i < len(code) - 32:
codebyte = safe_ord(code[i])
if codebyte == 0x5b:
o |= 1 << i
if 0x60 <= codebyte <= 0x7f:
pushcache[i] = utils.big_endian_to_int(
code[i + 1: i + codebyte - 0x5e])
i += codebyte - 0x5e
else:
i += 1
return o, pushcache
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 decompress(data):
o = b''
i = 0
while i < len(data):
if data[i:i + 1] == b'\xfe':
if i == len(data) - 1:
raise Exception("Invalid encoding, \\xfe at end")
elif data[i + 1:i + 2] == b'\x00':
o += b'\xfe'
elif data[i + 1:i + 2] == b'\x01':
o += NULLSHA3
else:
o += b'\x00' * safe_ord(data[i + 1])
i += 1
else:
o += data[i:i + 1]
i += 1
return o
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 proc_modexp(ext, msg):
if not ext.post_metropolis_hardfork():
return 1, msg.gas, []
print('modexp proc', msg.gas)
baselen = msg.data.extract32(0)
explen = msg.data.extract32(32)
modlen = msg.data.extract32(64)
first_exp_bytes = msg.data.extract32(96 + baselen) >> (8 *
max(32 - explen, 0))
bitlength = -1
while first_exp_bytes:
bitlength += 1
first_exp_bytes >>= 1
adjusted_explen = max(bitlength, 0) + 8 * max(explen - 32, 0)
gas_cost = (mult_complexity(max(modlen, baselen)) *
max(adjusted_explen, 1)) // opcodes.GMODEXPQUADDIVISOR
print(baselen, explen, modlen, 'expected gas cost', gas_cost)
if msg.gas < gas_cost:
return 0, 0, []
if baselen == 0:
return 1, msg.gas - gas_cost, [0] * modlen
if modlen == 0:
return 1, msg.gas - gas_cost, []
base = bytearray(baselen)
msg.data.extract_copy(base, 0, 96, baselen)
exp = bytearray(explen)
msg.data.extract_copy(exp, 0, 96 + baselen, explen)
mod = bytearray(modlen)
msg.data.extract_copy(mod, 0, 96 + baselen + explen, modlen)
if utils.big_endian_to_int(mod) == 0:
return 1, msg.gas - gas_cost, [0] * modlen
o = pow(utils.big_endian_to_int(base), utils.big_endian_to_int(exp),
utils.big_endian_to_int(mod))
return 1, msg.gas - \
gas_cost, [
safe_ord(x) for x in utils.zpad(
utils.int_to_big_endian(o), modlen)]
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 bloom_insert(bloom, val):
h = utils.sha3(val)
# print('bloom_insert', bloom_bits(val), repr(val))
for i in range(0, BUCKETS_PER_VAL * 2, 2):
bloom |= 1 << ((safe_ord(h[i + 1]) + (safe_ord(h[i]) << 8)) & 2047)
return bloom
def test_multiarg_code():
c = tester.Chain()
x = c.contract(multiarg_code, language='serpent')
o = x.kall([1, 2, 3], 4, [5, 6, 7], b"doge", 8)
assert o == [862541, safe_ord('d') + safe_ord('o') + safe_ord('g'), 4]
def apply_transaction(state, tx):
state.logs = []
state.suicides = []
state.refunds = 0
validate_transaction(state, tx)
intrinsic_gas = tx.intrinsic_gas_used
if state.is_HOMESTEAD():
assert tx.s * 2 < transactions.secpk1n
if not tx.to or tx.to == CREATE_CONTRACT_ADDRESS:
intrinsic_gas += opcodes.CREATE[3]
if tx.startgas < intrinsic_gas:
raise InsufficientStartGas(
rp(tx, 'startgas', tx.startgas, intrinsic_gas))
log_tx.debug('TX NEW', txdict=tx.to_dict())
# start transacting #################
if tx.sender != null_address:
state.increment_nonce(tx.sender)
# buy startgas
assert state.get_balance(tx.sender) >= tx.startgas * tx.gasprice
state.delta_balance(tx.sender, -tx.startgas * tx.gasprice)
message_data = vm.CallData([safe_ord(x) for x in tx.data], 0, len(tx.data))
message = vm.Message(tx.sender,
tx.to,
tx.value,
tx.startgas - intrinsic_gas,
message_data,
code_address=tx.to)
# MESSAGE
ext = VMExt(state, tx)
if tx.to != b'':
result, gas_remained, data = apply_msg(ext, message)
else: # CREATE
result, gas_remained, data = create_contract(ext, message)
assert gas_remained >= 0
log_tx.debug("TX APPLIED",
result=result,
gas_remained=gas_remained,
data=data)
gas_used = tx.startgas - gas_remained
# Transaction failed
if not result:
log_tx.debug('TX FAILED',
reason='out of gas',
startgas=tx.startgas,
gas_remained=gas_remained)
state.delta_balance(tx.sender, tx.gasprice * gas_remained)
state.delta_balance(state.block_coinbase, tx.gasprice * gas_used)
output = b''
success = 0
# Transaction success
else:
log_tx.debug('TX SUCCESS', data=data)
state.refunds += len(set(state.suicides)) * opcodes.GSUICIDEREFUND
if state.refunds > 0:
log_tx.debug('Refunding',
gas_refunded=min(state.refunds, gas_used // 2))
gas_remained += min(state.refunds, gas_used // 2)
gas_used -= min(state.refunds, gas_used // 2)
state.refunds = 0
# sell remaining gas
state.delta_balance(tx.sender, tx.gasprice * gas_remained)
state.delta_balance(state.block_coinbase, tx.gasprice * gas_used)
if tx.to:
output = bytearray_to_bytestr(data)
else:
output = data
success = 1
state.gas_used += gas_used
# Clear suicides
suicides = state.suicides
state.suicides = []
for s in suicides:
state.set_balance(s, 0)
state.del_account(s)
# Pre-Metropolis: commit state after every tx
if not state.is_METROPOLIS() and not SKIP_MEDSTATES:
state.commit()
# Construct a receipt
r = mk_receipt(state, success, state.logs)
_logs = list(state.logs)
state.logs = []
state.add_receipt(r)
state.set_param('bloom', state.bloom | r.bloom)
state.set_param('txindex', state.txindex + 1)
return success, output
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
processed_code = preprocess_code(code)
s = time.time()
op = None
steps = 0
_prevop = None # for trace only
while True:
# print('op: ', op, time.time() - s)
# s = time.time()
# stack size limit error
if compustate.pc not in processed_code:
return vm_exception('INVALID START POINT')
_data = processed_code[compustate.pc]
gas, min_stack, max_stack, compustate.pc = _data[:4]
ops = _data[4:]
# out of gas error
if gas > compustate.gas:
return vm_exception('OUT OF GAS')
# insufficient stack error
if not (min_stack <= len(compustate.stack) <= max_stack):
return vm_exception('INCOMPATIBLE STACK LENGTH',
min_stack=min_stack,
have=len(compustate.stack),
max_stack=max_stack)
# Apply operation
compustate.gas -= gas
for op 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 (op_MLOAD, op_MSTORE, op_MSTORE8, op_SHA3,
op_CALL, op_CALLCODE, op_CREATE,
op_CALLDATACOPY, op_CODECOPY, op_EXTCODECOPY):
if len(compustate.memory) < 1024:
trace_data['memory'] = \
b''.join([encode_hex(ascii_chr(x)) for x
in compustate.memory])
else:
trace_data['sha3memory'] = \
encode_hex(utils.sha3(''.join([ascii_chr(x) for
x in compustate.memory])))
if _prevop in (op_SSTORE, op_SLOAD) or steps == 0:
trace_data['storage'] = ext.log_storage(msg.to)
# trace_data['gas'] = to_string(compustate.gas + fee)
trace_data['inst'] = op
trace_data['pc'] = to_string(compustate.pc - 1)
if steps == 0:
trace_data['depth'] = msg.depth
trace_data['address'] = msg.to
trace_data['op'] = op
trace_data['steps'] = steps
# if op[:4] == 'PUSH':
# trace_data['pushvalue'] = pushval
log_vm_op.trace('vm', **trace_data)
steps += 1
_prevop = op
# Invalid operation
if op == INVALID:
return vm_exception('INVALID OP', opcode=op)
# Valid operations
if op < 0x10:
if op == op_STOP:
return peaceful_exit('STOP', compustate.gas, [])
elif op == op_ADD:
stk.append((stk.pop() + stk.pop()) & TT256M1)
elif op == op_SUB:
stk.append((stk.pop() - stk.pop()) & TT256M1)
elif op == op_MUL:
stk.append((stk.pop() * stk.pop()) & TT256M1)
elif op == op_DIV:
s0, s1 = stk.pop(), stk.pop()
stk.append(0 if s1 == 0 else s0 // s1)
elif op == op_MOD:
s0, s1 = stk.pop(), stk.pop()
stk.append(0 if s1 == 0 else s0 % s1)
elif op == 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 == 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 == op_ADDMOD:
s0, s1, s2 = stk.pop(), stk.pop(), stk.pop()
stk.append((s0 + s1) % s2 if s2 else 0)
elif op == op_MULMOD:
s0, s1, s2 = stk.pop(), stk.pop(), stk.pop()
stk.append((s0 * s1) % s2 if s2 else 0)
elif op == 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 compustate.gas < expfee:
compustate.gas = 0
return vm_exception('OOG EXPONENT')
compustate.gas -= expfee
stk.append(pow(base, exponent, TT256))
elif op == 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 op < 0x20:
if op == op_LT:
stk.append(1 if stk.pop() < stk.pop() else 0)
elif op == op_GT:
stk.append(1 if stk.pop() > stk.pop() else 0)
elif op == op_SLT:
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(
stk.pop())
stk.append(1 if s0 < s1 else 0)
elif op == op_SGT:
s0, s1 = utils.to_signed(stk.pop()), utils.to_signed(
stk.pop())
stk.append(1 if s0 > s1 else 0)
elif op == op_EQ:
stk.append(1 if stk.pop() == stk.pop() else 0)
elif op == op_ISZERO:
stk.append(0 if stk.pop() else 1)
elif op == op_AND:
stk.append(stk.pop() & stk.pop())
elif op == op_OR:
stk.append(stk.pop() | stk.pop())
elif op == op_XOR:
stk.append(stk.pop() ^ stk.pop())
elif op == op_NOT:
stk.append(TT256M1 - stk.pop())
elif op == op_BYTE:
s0, s1 = stk.pop(), stk.pop()
if s0 >= 32:
stk.append(0)
else:
stk.append((s1 // 256**(31 - s0)) % 256)
elif op < 0x40:
if op == 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 = b''.join(map(ascii_chr, mem[s0:s0 + s1]))
stk.append(utils.big_endian_to_int(utils.sha3(data)))
elif op == op_ADDRESS:
stk.append(utils.coerce_to_int(msg.to))
elif op == op_BALANCE:
addr = utils.coerce_addr_to_hex(stk.pop() % 2**160)
stk.append(ext.get_balance(addr))
elif op == op_ORIGIN:
stk.append(utils.coerce_to_int(ext.tx_origin))
elif op == op_CALLER:
stk.append(utils.coerce_to_int(msg.sender))
elif op == op_CALLVALUE:
stk.append(msg.value)
elif op == op_CALLDATALOAD:
stk.append(msg.data.extract32(stk.pop()))
elif op == op_CALLDATASIZE:
stk.append(msg.data.size)
elif op == 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 == op_CODESIZE:
stk.append(len(code))
elif op == op_CODECOPY:
start, s1, size = stk.pop(), stk.pop(), stk.pop()
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 s1 + i < len(code):
mem[start + i] = utils.safe_ord(code[s1 + i])
else:
mem[start + i] = 0
elif op == op_GASPRICE:
stk.append(ext.tx_gasprice)
elif op == op_EXTCODESIZE:
addr = utils.coerce_addr_to_hex(stk.pop() % 2**160)
stk.append(len(ext.get_code(addr) or b''))
elif op == op_EXTCODECOPY:
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 op < 0x50:
if op == op_BLOCKHASH:
stk.append(
utils.big_endian_to_int(ext.block_hash(stk.pop())))
elif op == op_COINBASE:
stk.append(utils.big_endian_to_int(ext.block_coinbase))
elif op == op_TIMESTAMP:
stk.append(ext.block_timestamp)
elif op == op_NUMBER:
stk.append(ext.block_number)
elif op == op_DIFFICULTY:
stk.append(ext.block_difficulty)
elif op == op_GASLIMIT:
stk.append(ext.block_gas_limit)
elif op < 0x60:
if op == op_POP:
stk.pop()
elif op == op_MLOAD:
s0 = stk.pop()
if not mem_extend(mem, compustate, op, s0, 32):
return vm_exception('OOG EXTENDING MEMORY')
data = 0
for c in mem[s0:s0 + 32]:
data = (data << 8) + c
stk.append(data)
elif op == op_MSTORE:
s0, s1 = stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, s0, 32):
return vm_exception('OOG EXTENDING MEMORY')
v = s1
for i in range(31, -1, -1):
mem[s0 + i] = v % 256
v //= 256
elif op == 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 == op_SLOAD:
stk.append(ext.get_storage_data(msg.to, stk.pop()))
elif op == op_SSTORE:
s0, s1 = stk.pop(), stk.pop()
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 == op_JUMP:
compustate.pc = stk.pop()
opnew = processed_code[compustate.pc][4] if \
compustate.pc in processed_code else op_STOP
if opnew != op_JUMPDEST:
return vm_exception('BAD JUMPDEST')
elif op == op_JUMPI:
s0, s1 = stk.pop(), stk.pop()
if s1:
compustate.pc = s0
opnew = processed_code[compustate.pc][4] if \
compustate.pc in processed_code else op_STOP
if opnew != op_JUMPDEST:
return vm_exception('BAD JUMPDEST')
elif op == op_PC:
stk.append(compustate.pc - 1)
elif op == op_MSIZE:
stk.append(len(mem))
elif op == op_GAS:
stk.append(compustate.gas) # AFTER subtracting cost 1
elif op_PUSH1 <= (op & 255) <= op_PUSH32:
# Hide push value in high-order bytes of op
stk.append(op >> 8)
elif op_DUP1 <= op <= op_DUP16:
depth = op - op_DUP1 + 1
stk.append(stk[-depth])
elif op_SWAP1 <= op <= op_SWAP16:
depth = op - op_SWAP1 + 1
temp = stk[-depth - 1]
stk[-depth - 1] = stk[-1]
stk[-1] = temp
elif op_LOG0 <= op <= op_LOG4:
"""
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 = op - op_LOG0
mstart, msz = stk.pop(), stk.pop()
topics = [stk.pop() for x in range(depth)]
compustate.gas -= msz * opcodes.GLOGBYTE
if not mem_extend(mem, compustate, op, mstart, msz):
return vm_exception('OOG EXTENDING MEMORY')
data = b''.join(map(ascii_chr, 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 == 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 ext.get_balance(msg.to) >= value and msg.depth < 1024:
cd = CallData(mem, mstart, msz)
create_msg = Message(msg.to, b'', value, compustate.gas,
cd, msg.depth + 1)
o, gas, addr = ext.create(create_msg)
if o:
stk.append(utils.coerce_to_int(addr))
compustate.gas = gas
else:
stk.append(0)
compustate.gas = 0
else:
stk.append(0)
elif op == op_CALL:
gas, to, value, meminstart, meminsz, memoutstart, memoutsz = \
stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop()
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.encode_int(to)
to = ((b'\x00' * (32 - len(to))) + to)[12:]
extra_gas = (not ext.account_exists(to)) * opcodes.GCALLNEWACCOUNT + \
(value > 0) * opcodes.GCALLVALUETRANSFER
submsg_gas = gas + opcodes.GSTIPEND * (value > 0)
if compustate.gas < gas + extra_gas:
return vm_exception('OUT OF GAS', needed=gas + extra_gas)
if ext.get_balance(msg.to) >= value and msg.depth < 1024:
compustate.gas -= (gas + extra_gas)
cd = CallData(mem, meminstart, meminsz)
call_msg = Message(msg.to,
to,
value,
submsg_gas,
cd,
msg.depth + 1,
code_address=to)
result, gas, data = ext.msg(call_msg)
if result == 0:
stk.append(0)
else:
stk.append(1)
compustate.gas += gas
for i in range(min(len(data), memoutsz)):
mem[memoutstart + i] = data[i]
else:
compustate.gas -= (gas + extra_gas - submsg_gas)
stk.append(0)
elif op == op_CALLCODE:
gas, to, value, meminstart, meminsz, memoutstart, memoutsz = \
stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop(), stk.pop()
if not mem_extend(mem, compustate, op, meminstart, meminsz) or \
not mem_extend(mem, compustate, op, memoutstart, memoutsz):
return vm_exception('OOG EXTENDING MEMORY')
extra_gas = (value > 0) * opcodes.GCALLVALUETRANSFER
submsg_gas = gas + opcodes.GSTIPEND * (value > 0)
if compustate.gas < gas + extra_gas:
return vm_exception('OUT OF GAS', needed=gas + extra_gas)
if ext.get_balance(msg.to) >= value and msg.depth < 1024:
compustate.gas -= (gas + extra_gas)
to = utils.encode_int(to)
to = ((b'\x00' * (32 - len(to))) + to)[12:]
cd = CallData(mem, meminstart, meminsz)
call_msg = Message(msg.to,
msg.to,
value,
submsg_gas,
cd,
msg.depth + 1,
code_address=to)
result, gas, data = ext.msg(call_msg)
if result == 0:
stk.append(0)
else:
stk.append(1)
compustate.gas += gas
for i in range(min(len(data), memoutsz)):
mem[memoutstart + i] = data[i]
else:
compustate.gas -= (gas + extra_gas - submsg_gas)
stk.append(0)
elif op == 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 == op_SUICIDE:
to = utils.encode_int(stk.pop())
to = ((b'\x00' * (32 - len(to))) + to)[12:]
xfer = ext.get_balance(msg.to)
ext.set_balance(to, ext.get_balance(to) + xfer)
ext.set_balance(msg.to, 0)
ext.add_suicide(msg.to)
# print('suiciding %s %s %d' % (msg.to, to, xfer))
return 1, compustate.gas, []
