nem: create transfer (including mosaics)

src/apps/nem/helpers.py

@@ -6,6 +6,15 @@ NEM_NETWORK_TESTNET = const(0x98)
 NEM_NETWORK_MIJIN = const(0x60)
 NEM_CURVE = 'ed25519-keccak'
 
+NEM_TRANSACTION_TYPE_TRANSFER = const(0x0101)
+NEM_TRANSACTION_TYPE_IMPORTANCE_TRANSFER = const(0x0801)
+NEM_TRANSACTION_TYPE_AGGREGATE_MODIFICATION = const(0x1001)
+NEM_TRANSACTION_TYPE_MULTISIG_SIGNATURE = const(0x1002)
+NEM_TRANSACTION_TYPE_MULTISIG = const(0x1004)
+NEM_TRANSACTION_TYPE_PROVISION_NAMESPACE = const(0x2001)
+NEM_TRANSACTION_TYPE_MOSAIC_CREATION = const(0x4001)
+NEM_TRANSACTION_TYPE_MOSAIC_SUPPLY_CHANGE = const(0x4002)
+
 
 def nem_validate_network(network):
     if network in (NEM_NETWORK_MAINNET, NEM_NETWORK_TESTNET, NEM_NETWORK_MIJIN):

src/apps/nem/sign_tx.py

@@ -0,0 +1,64 @@
+
+from .helpers import *
+from .writers import *
+
+
+def nem_transaction_create_transfer(network: int, timestamp: int, signer_public_key: bytes, fee: int, deadline: int,
+                                    recipient: str, amount: int, payload: bytearray = None, encrypted: bool = False,
+                                    mosaics: int = 0) -> bytearray:
+
+    tx = _nem_transaction_write_common(NEM_TRANSACTION_TYPE_TRANSFER,
+                                       _nem_get_version(network, mosaics),
+                                       timestamp,
+                                       signer_public_key,
+                                       fee,
+                                       deadline)
+
+    write_bytes_with_length(tx, bytearray(recipient))
+    write_uint64(tx, amount)
+
+    if payload:
+        # payload + payload size (u32) + encryption flag (u32)
+        write_uint32(tx, len(payload) + 2 * 4)
+        if encrypted:
+            write_uint32(tx, 0x02)
+        else:
+            write_uint32(tx, 0x01)
+        write_bytes_with_length(tx, payload)
+    else:
+        write_uint32(tx, 0)
+
+    if mosaics:
+        write_uint32(tx, mosaics)
+
+    return tx
+
+
+def nem_transaction_write_mosaic(w: bytearray, namespace: str, mosaic: str, quantity: int):
+    identifier_length = 4 + len(namespace) + 4 + len(mosaic)
+    # indentifier length (u32) + quantity (u64) + identifier size
+    write_uint32(w, 4 + 8 + identifier_length)
+    write_uint32(w, identifier_length)
+    write_bytes_with_length(w, bytearray(namespace))
+    write_bytes_with_length(w, bytearray(mosaic))
+    write_uint64(w, quantity)
+
+
+def _nem_transaction_write_common(tx_type: int, version: int, timestamp: int, signer: bytes, fee: int, deadline: int)\
+        -> bytearray:
+    ret = bytearray()
+    write_uint32(ret, tx_type)
+    write_uint32(ret, version)
+    write_uint32(ret, timestamp)
+
+    write_bytes_with_length(ret, bytearray(signer))
+    write_uint64(ret, fee)
+    write_uint32(ret, deadline)
+
+    return ret
+
+
+def _nem_get_version(network, mosaics) -> int:
+    if mosaics:
+        return network << 24 | 2
+    return network << 24 | 1

src/apps/nem/writers.py

@@ -0,0 +1,26 @@
+
+def write_uint32(w, n: int):
+    w.append(n & 0xFF)
+    w.append((n >> 8) & 0xFF)
+    w.append((n >> 16) & 0xFF)
+    w.append((n >> 24) & 0xFF)
+
+
+def write_uint64(w, n: int):
+    w.append(n & 0xFF)
+    w.append((n >> 8) & 0xFF)
+    w.append((n >> 16) & 0xFF)
+    w.append((n >> 24) & 0xFF)
+    w.append((n >> 32) & 0xFF)
+    w.append((n >> 40) & 0xFF)
+    w.append((n >> 48) & 0xFF)
+    w.append((n >> 56) & 0xFF)
+
+
+def write_bytes(w, buf: bytearray):
+    w.extend(buf)
+
+
+def write_bytes_with_length(w, buf: bytearray):
+    write_uint32(w, len(buf))
+    write_bytes(w, buf)

tests/test_apps.nem.transfer.py

@@ -0,0 +1,92 @@
+from common import *
+
+from apps.nem.sign_tx import *
+from trezor.crypto import hashlib
+
+
+class TestNemTransfer(unittest.TestCase):
+
+    def test_create_transfer(self):
+
+        # http://bob.nem.ninja:8765/#/transfer/0acbf8df91e6a65dc56c56c43d65f31ff2a6a48d06fc66e78c7f3436faf3e74f
+        t = nem_transaction_create_transfer(NEM_NETWORK_TESTNET,
+                                            0,
+                                            unhexlify('e59ef184a612d4c3c4d89b5950eb57262c69862b2f96e59c5043bf41765c482f'),
+                                            0,
+                                            0,
+                                            'TBGIMRE4SBFRUJXMH7DVF2IBY36L2EDWZ37GVSC4',
+                                            50000000000000)
+
+        self.assertEqual(t, unhexlify('01010000010000980000000020000000e59ef184a612d4c3c4d89b5950eb57262c69862b2f96e59c5043bf41765c482f00000000000000000000000028000000544247494d52453453424652554a584d48374456463249425933364c324544575a3337475653433400203d88792d000000000000'))
+        self.assertEqual(hashlib.sha3_256(t).digest(True), unhexlify('0acbf8df91e6a65dc56c56c43d65f31ff2a6a48d06fc66e78c7f3436faf3e74f'))
+
+    def test_create_transfer_with_payload(self):
+
+        # http://chain.nem.ninja/#/transfer/e90e98614c7598fbfa4db5411db1b331d157c2f86b558fb7c943d013ed9f71cb
+        t = nem_transaction_create_transfer(NEM_NETWORK_MAINNET,
+                                            0,
+                                            unhexlify(
+                                                '8d07f90fb4bbe7715fa327c926770166a11be2e494a970605f2e12557f66c9b9'),
+                                            0,
+                                            0,
+                                            'NBT3WHA2YXG2IR4PWKFFMO772JWOITTD2V4PECSB',
+                                            5175000000000,
+                                            bytearray('Good luck!'))
+
+        self.assertEqual(hashlib.sha3_256(t).digest(True), unhexlify('e90e98614c7598fbfa4db5411db1b331d157c2f86b558fb7c943d013ed9f71cb'))
+
+    def test_create_transfer_with_mosaic(self):
+
+        # http://bob.nem.ninja:8765/#/transfer/3409d9ece28d6296d6d5e220a7e3cb8641a3fb235ffcbd20c95da64f003ace6c
+        t = nem_transaction_create_transfer(NEM_NETWORK_TESTNET,
+                                            14072100,
+                                            unhexlify('994793ba1c789fa9bdea918afc9b06e2d0309beb1081ac5b6952991e4defd324'),
+                                            194000000,
+                                            14075700,
+                                            'TBLOODPLWOWMZ2TARX4RFPOSOWLULHXMROBN2WXI',
+                                            3000000,
+                                            bytearray('sending you 3 pairs of paddles\n'),
+                                            False,
+                                            2)
+        self.assertEqual(t, unhexlify('010100000200009824b9d60020000000994793ba1c789fa9bdea918afc9b06e2d0309beb1081ac5b6952991e4defd3248034900b0000000034c7d6002800000054424c4f4f44504c574f574d5a3254415258345246504f534f574c554c48584d524f424e32575849c0c62d000000000027000000010000001f00000073656e64696e6720796f752033207061697273206f6620706164646c65730a02000000'))
+
+        nem_transaction_write_mosaic(t, 'gimre.games.pong', 'paddles', 2)
+        nem_transaction_write_mosaic(t, 'nem', 'xem', 44000000)
+
+        self.assertEqual(hashlib.sha3_256(t).digest(True), unhexlify('3409d9ece28d6296d6d5e220a7e3cb8641a3fb235ffcbd20c95da64f003ace6c'))
+
+        # http://chain.nem.ninja/#/transfer/882dca18dcbe075e15e0ec5a1d7e6ccd69cc0f1309ffd3fde227bfbc107b3f6e
+        t = nem_transaction_create_transfer(NEM_NETWORK_MAINNET,
+                                            26730750,
+                                            unhexlify(
+                                                'f85ab43dad059b9d2331ddacc384ad925d3467f03207182e01296bacfb242d01'),
+                                            179500000,
+                                            26734350,
+                                            'NBE223WPKEBHQPCYUC4U4CDUQCRRFMPZLOQLB5OP',
+                                            1000000,
+                                            bytearray('enjoy! :)'),
+                                            False,
+                                            1)
+        nem_transaction_write_mosaic(t, 'imre.g', 'tokens', 1)
+
+        self.assertEqual(hashlib.sha3_256(t).digest(True), unhexlify('882dca18dcbe075e15e0ec5a1d7e6ccd69cc0f1309ffd3fde227bfbc107b3f6e'))
+
+    def test_create_transfer_with_encrypted_payload(self):
+
+        # http://chain.nem.ninja/#/transfer/40e89160e6f83d37f7c82defc0afe2c1605ae8c919134570a51dd27ea1bb516c
+
+        t = nem_transaction_create_transfer(NEM_NETWORK_MAINNET,
+                                            77229,
+                                            unhexlify('f85ab43dad059b9d2331ddacc384ad925d3467f03207182e01296bacfb242d01'),
+                                            30000000,
+                                            80829,
+                                            'NALICEPFLZQRZGPRIJTMJOCPWDNECXTNNG7QLSG3',
+                                            30000000,
+                                            unhexlify('4d9dcf9186967d30be93d6d5404ded22812dbbae7c3f0de501bcd7228cba45bded13000eec7b4c6215fc4d3588168c9218167cec98e6977359153a4132e050f594548e61e0dc61c153f0f53c5e65c595239c9eb7c4e7d48e0f4bb8b1dd2f5ddc'),
+                                            True)
+
+        self.assertEqual(hashlib.sha3_256(t).digest(True), unhexlify('40e89160e6f83d37f7c82defc0afe2c1605ae8c919134570a51dd27ea1bb516c'))
+
+
+if __name__ == '__main__':
+    unittest.main()