def from_human(cls, data):
hex_str = []
d = data.split()
while 1:
if len(d) == 0:
break
word = d[0]
d = d[1:]
if word.startswith('PUSHDATA'):
continue
opcode = OPCODES_BY_NAME.get(word)
if opcode:
hex_str.append(hex(opcode)[2:])
continue
# data to be pushed
pushdata = word
try:
i = int(pushdata, 16)
if pushdata.startswith('0x'):
pushdata = pushdata[2:]
if len(pushdata) % 2 != 0:
pushdata = ''.join(['0', pushdata])
except Exception:
pushdata = word.encode('hex')
hex_str.append(push_script(pushdata))
hex_str = ''.join(hex_str)
return cls(hex_str.decode('hex'))
def from_human(cls, data):
hex_str = []
d = data.split()
while 1:
if len(d) == 0:
break
word = d[0]
d = d[1:]
if word.startswith('PUSHDATA'):
continue
opcode = OPCODES_BY_NAME.get(word)
if opcode:
hex_str.append(hex(opcode)[2:])
continue
# data to be pushed
pushdata = word
try:
i = int(pushdata, 16)
if pushdata.startswith('0x'):
pushdata = pushdata[2:]
if len(pushdata) % 2 != 0:
pushdata = ''.join(['0', pushdata])
except Exception:
pushdata = word.encode('hex')
hex_str.append(push_script(pushdata))
hex_str = ''.join(hex_str)
return cls(hex_str.decode('hex'))
def from_string(string):
# TODO: this should probably go in a util package.
def ishex(s):
return set(s).issubset(set('0123456789abcdefABCDEF'))
r = []
# Create an opcodes_by_name table with both OP_ prefixed names and
# shortened ones with the OP_ dropped.
opcodes_by_name = {}
for name, code in OPCODES_BY_NAME.items():
opcodes_by_name[name] = code
opcodes_by_name[name[3:]] = code
for word in string.split():
if word.isdigit() or (word[0] == '-' and word[1:].isdigit()):
r.append(CScript([int(word)]))
elif ishex(word):
word_bytes = unhexlify(word.encode('utf8'))
push_code = bytes([len(word_bytes)])
r.append(push_code + word_bytes)
elif len(word) >= 2 and word[0] == "'" and word[-1] == "'":
r.append(CScript([bytes(word[1:-1].encode('utf8'))]))
elif word in opcodes_by_name:
r.append(CScript([opcodes_by_name[word]]))
else:
raise ValueError("Error parsing script: %r" % string)
return CScript(b''.join(r))
def from_string(string):
def ishex(s):
return set(s).issubset(set('0123456789abcdefABCDEF'))
r = []
# Create an opcodes_by_name table with both OP_ prefixed names and
# shortened ones with the OP_ dropped.
opcodes_by_name = {}
for name, code in OPCODES_BY_NAME.items():
opcodes_by_name[name] = code
opcodes_by_name[name[3:]] = code
for word in string.split():
if word.isdigit() or (word[0] == '-' and word[1:].isdigit()):
r.append(CScript([long(word)]))
elif ishex(word):
word_bytes = unhexlify(word.encode('utf8'))
push_code = chr(len(word_bytes))
r.append(push_code + word_bytes)
elif len(word) >= 2 and word[0] == "'" and word[-1] == "'":
r.append(CScript([bytes(word[1:-1].encode('utf8'))]))
elif word in opcodes_by_name:
r.append(CScript([opcodes_by_name[word]]))
else:
raise ValueError("Error parsing script: %r" % string)
return CScript(b''.join(r))
def from_human(cls, data):
hex_str = []
d = data.split()
while 1:
if len(d) == 0:
break
word = d[0]
d = d[1:]
if word.startswith("PUSHDATA"):
continue
found = False
accepted_forms = [word]
try:
a = int(word)
except ValueError:
accepted_forms.append("".join(["OP_", word]))
# e.g. "OP_DUP" and "DUP" are both valid
for i in accepted_forms:
opcode = OPCODES_BY_NAME.get(i)
if opcode:
found = True
hex_str.append(hex(opcode)[2:])
if found:
continue
# data to be pushed
pushdata = word
try:
i = int(pushdata, 16)
if pushdata.startswith("0x"):
pushdata = pushdata[2:]
if len(pushdata) % 2 != 0:
pushdata = "".join(["0", pushdata])
except Exception:
pushdata = word.encode("hex")
hex_str.append(push_script(pushdata))
hex_str = "".join(hex_str)
return cls(hex_str.decode("hex"))
def from_human(cls, data):
hex_str = []
d = data.split()
while 1:
if len(d) == 0:
break
word = d[0]
d = d[1:]
if word.startswith('PUSHDATA'):
continue
found = False
accepted_forms = [word]
try:
a = int(word)
except ValueError:
accepted_forms.append(''.join(['OP_', word]))
# e.g. "OP_DUP" and "DUP" are both valid
for i in accepted_forms:
opcode = OPCODES_BY_NAME.get(i)
if opcode:
found = True
hex_str.append(hex(opcode)[2:])
if found:
continue
# data to be pushed
pushdata = word
try:
i = int(pushdata, 16)
if pushdata.startswith('0x'):
pushdata = pushdata[2:]
if len(pushdata) % 2 != 0:
pushdata = ''.join(['0', pushdata])
except Exception:
pushdata = word.encode('hex')
hex_str.append(push_script(pushdata))
hex_str = ''.join(hex_str)
return cls(hex_str.decode('hex'))
