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)