def encrypt(self, memo):
""" Encrypt a memo
:param str memo: clear text memo message
:returns: encrypted memo
:rtype: str
"""
if not memo:
return None
nonce = str(random.getrandbits(64))
memo_wif = self.blockchain.wallet.getPrivateKeyForPublicKey(
self.from_account["options"]["memo_key"])
if not memo_wif:
raise MissingKeyError("Memo key for %s missing!" %
self.from_account["name"])
if not hasattr(self, 'chain_prefix'):
self.chain_prefix = self.blockchain.prefix
enc = PPYMemo.encode_memo(
PrivateKey(memo_wif),
PublicKey(self.to_account["options"]["memo_key"],
prefix=self.chain_prefix), nonce, memo)
return {
"message": enc,
"nonce": nonce,
"from": self.from_account["options"]["memo_key"],
"to": self.to_account["options"]["memo_key"]
}
def test_Transfer(self):
pub = format(account.PrivateKey(wif).pubkey, prefix)
from_account_id = "1.2.0"
to_account_id = "1.2.1"
amount = 1000000
asset_id = "1.3.4"
message = "abcdefgABCDEFG0123456789"
nonce = "5862723643998573708"
fee = objects.Asset(amount=0, asset_id="1.3.0")
amount = objects.Asset(amount=int(amount), asset_id=asset_id)
encrypted_memo = memo.encode_memo(
account.PrivateKey(wif), account.PublicKey(pub, prefix=prefix),
nonce, message)
op = operations.Transfer(
**{
"fee": fee,
"from": from_account_id,
"to": to_account_id,
"amount": amount,
"memo": {
"from": pub,
"to": pub,
"nonce": nonce,
"message": encrypted_memo,
},
"prefix": prefix
})
ops = [Operation(op)]
tx = Signed_Transaction(ref_block_num=ref_block_num,
ref_block_prefix=ref_block_prefix,
expiration=expiration,
operations=ops)
tx = tx.sign([wif], chain=prefix)
tx.verify([PrivateKey(wif).pubkey], prefix)
txWire = hexlify(bytes(tx)).decode("ascii")
compare = ("f68585abf4dce7c804570100000000000000000000000140420"
"f0000000000040102c0ded2bc1f1305fb0faac5e6c03ee3a192"
"4234985427b6167ca569d13df435cf02c0ded2bc1f1305fb0fa"
"ac5e6c03ee3a1924234985427b6167ca569d13df435cf8c94d1"
"9817945c5120fa5b6e83079a878e499e2e52a76a7739e9de409"
"86a8e3bd8a68ce316cee50b210000011f39e3fa7071b795491e"
"3b6851d61e7c959be92cc7deb5d8491cf1c3c8c99a1eb44553c"
"348fb8f5001a78b18233ac66727e32fc776d48e92d9639d64f6"
"8e641948")
self.assertEqual(compare[:-130], txWire[:-130])
def test_Transfer(self):
pub = format(account.PrivateKey(wif).pubkey, prefix)
from_account_id = "1.2.0"
to_account_id = "1.2.1"
amount = 1000000
asset_id = "1.3.4"
message = "abcdefgABCDEFG0123456789"
nonce = "5862723643998573708"
fee = objects.Asset(amount=0, asset_id="1.3.0")
amount = objects.Asset(amount=int(amount), asset_id=asset_id)
encrypted_memo = memo.encode_memo(
account.PrivateKey(wif),
account.PublicKey(pub, prefix=prefix),
nonce,
message,
)
self.op = operations.Transfer(
**{
"fee": fee,
"from": from_account_id,
"to": to_account_id,
"amount": amount,
"memo": {
"from": pub,
"to": pub,
"nonce": nonce,
"message": encrypted_memo,
},
"prefix": prefix,
}
)
self.cm = (
"f68585abf4dce7c804570100000000000000000000000140420"
"f0000000000040102c0ded2bc1f1305fb0faac5e6c03ee3a192"
"4234985427b6167ca569d13df435cf02c0ded2bc1f1305fb0fa"
"ac5e6c03ee3a1924234985427b6167ca569d13df435cf8c94d1"
"9817945c5120fa5b6e83079a878e499e2e52a76a7739e9de409"
"86a8e3bd8a68ce316cee50b210000011f39e3fa7071b795491e"
"3b6851d61e7c959be92cc7deb5d8491cf1c3c8c99a1eb44553c"
"348fb8f5001a78b18233ac66727e32fc776d48e92d9639d64f6"
"8e641948"
)
self.doit()
def test_asset_issue(self):
message = "abcdefgABCDEFG0123456789"
nonce = "5862723643998573708"
pub = format(account.PrivateKey(wif).pubkey, prefix)
encrypted_memo = memo.encode_memo(
account.PrivateKey(wif),
account.PublicKey(pub, prefix=prefix),
nonce,
message,
)
self.op = operations.Asset_issue(
**{
"fee": {"amount": 0, "asset_id": "1.3.0"},
"issuer": "1.2.0",
"asset_to_issue": {"amount": 0, "asset_id": "1.3.0"},
"memo": {
"from": pub,
"to": pub,
"nonce": nonce,
"message": encrypted_memo,
},
"issue_to_account": "1.2.0",
"extensions": [],
"prefix": prefix,
}
)
self.cm = (
"f68585abf4dce7c80457010e000000000000000000000000000"
"00000000000000102c0ded2bc1f1305fb0faac5e6c03ee3a192"
"4234985427b6167ca569d13df435cf02c0ded2bc1f1305fb0fa"
"ac5e6c03ee3a1924234985427b6167ca569d13df435cf8c94d1"
"9817945c5120fa5b6e83079a878e499e2e52a76a7739e9de409"
"86a8e3bd8a68ce316cee50b210000012055139900ea2ae7db9d"
"4ef0d5d4015d2d993d0590ad32662bda94daba74a5e13411aef"
"4de6f847e9e4300e5c8c36aa8e5f9032d25fd8ca01abd58c7e9"
"528677e4"
)
self.doit()
def test_encrypt(self):
for memo in test_cases:
enc = encode_memo(PrivateKey(memo["wif"]),
PublicKey(memo["to"], prefix="GPH"),
memo["nonce"], memo["plain"])
self.assertEqual(memo["message"], enc)