def checksum_encode(addr): # Takes a 20-byte binary address as input
addr = normalize_address(addr)
o = ''
v = big_endian_to_int(sha3(addr))
for i, c in enumerate(encode_hex(addr)):
if c in '0123456789':
o += c
else:
o += c.upper() if (v & (2**(255 - 4 * i))) else c.lower()
return '0x' + o
def normalize_address(x, allow_blank=False):
if is_numeric(x):
return int_to_addr(x)
if allow_blank and x in {'', b''}:
return b''
if len(x) in (42, 50) and x[:2] in {'0x', b'0x'}:
x = x[2:]
if len(x) in (40, 48):
x = decode_hex(x)
if len(x) == 24:
assert len(x) == 24 and sha3(x[:20])[:4] == x[-4:]
x = x[:20]
if len(x) != 20:
raise Exception("Invalid address format: %r" % x)
return x
def sha3rlp(x):
return sha3(rlp.encode(x))
def privtoaddr(k):
k = normalize_key(k)
x, y = privtopub(k)
return sha3(encode_int32(x) + encode_int32(y))[12:]
def mk_metropolis_contract_address(sender, initcode):
return sha3(normalize_address(sender) + initcode)[12:]
def mk_contract_address(sender, nonce):
return sha3(rlp.encode([normalize_address(sender), nonce]))[12:]
o = 0
for a in arr:
o = (o << 8) + a
return o
def int_to_32bytearray(i):
o = [0] * 32
for x in range(32):
o[31 - x] = i & 0xff
i >>= 8
return o
assert encode_hex(
sha3(b'')) == 'c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470'
@Memoize
def privtoaddr(k):
k = normalize_key(k)
x, y = privtopub(k)
return sha3(encode_int32(x) + encode_int32(y))[12:]
def checksum_encode(addr): # Takes a 20-byte binary address as input
addr = normalize_address(addr)
o = ''
v = big_endian_to_int(sha3(addr))
for i, c in enumerate(encode_hex(addr)):
if c in '0123456789':
o = 0
for a in arr:
o = (o << 8) + a
return o
def int_to_32bytearray(i):
o = [0] * 32
for x in range(32):
o[31 - x] = i & 0xFF
i >>= 8
return o
assert (
encode_hex(sha3(b""))
== "c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470"
)
@Memoize
def privtoaddr(k):
k = normalize_key(k)
x, y = privtopub(k)
return sha3(encode_int32(x) + encode_int32(y))[12:]
def checksum_encode(addr): # Takes a 20-byte binary address as input
addr = normalize_address(addr)
o = ""
v = big_endian_to_int(sha3(addr))
def bytearray_to_int(arr):
o = 0
for a in arr:
o = (o << 8) + a
return o
def int_to_32bytearray(i):
o = [0] * 32
for x in range(32):
o[31 - x] = i & 0xFF
i >>= 8
return o
assert (encode_hex(sha3(b"")) ==
"c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470")
@Memoize
def privtoaddr(k):
k = normalize_key(k)
x, y = privtopub(k)
return sha3(encode_int32(x) + encode_int32(y))[12:]
def checksum_encode(addr): # Takes a 20-byte binary address as input
addr = normalize_address(addr)
o = ""
v = big_endian_to_int(sha3(addr))
for i, c in enumerate(encode_hex(addr)):
