Add SmartCash Support (#640)

.travis.yml

@@ -36,6 +36,7 @@ install:
   - pip install groestlcoin_hash
   - pip install git+https://github.com/goacoincore/neoscrypt
   - pip install git+https://github.com/motioncrypto/x16r_hash
+  - pip install pycryptodomex
 # command to run tests
 script:
   - pytest --cov=electrumx

electrumx/lib/coins.py

@@ -45,7 +45,8 @@ from electrumx.lib.script import ScriptPubKey, OpCodes
 import electrumx.lib.tx as lib_tx
 import electrumx.server.block_processor as block_proc
 import electrumx.server.daemon as daemon
-from electrumx.server.session import ElectrumX, DashElectrumX
+from electrumx.server.session import (ElectrumX, DashElectrumX,
+                                      SmartCashElectrumX)
 
 
 Block = namedtuple("Block", "raw header transactions")
@@ -2300,3 +2301,32 @@ class CivXTestnet(CivX):
             return double_sha256(header)
         else:
             return hex_str_to_hash(CivXTestnet.GENESIS_HASH)
+
+
+class SmartCash(Coin):
+    NAME = "SmartCash"
+    SHORTNAME = "SMART"
+    NET = "mainnet"
+    P2PKH_VERBYTE = bytes.fromhex("3f")
+    P2SH_VERBYTES = [bytes.fromhex("12")]
+    WIF_BYTE = bytes.fromhex("bf")
+    GENESIS_HASH = ('000007acc6970b812948d14ea5a0a13d'
+                    'b0fdd07d5047c7e69101fa8b361e05a4')
+    DESERIALIZER = lib_tx.DeserializerSmartCash
+    RPC_PORT = 9679
+    REORG_LIMIT = 5000
+    TX_COUNT = 1115016
+    TX_COUNT_HEIGHT = 541656
+    TX_PER_BLOCK = 1
+    ENCODE_CHECK = partial(Base58.encode_check,
+                           hash_fn=lib_tx.DeserializerSmartCash.keccak)
+    DECODE_CHECK = partial(Base58.decode_check,
+                           hash_fn=lib_tx.DeserializerSmartCash.keccak)
+    HEADER_HASH = lib_tx.DeserializerSmartCash.keccak
+    DAEMON = daemon.SmartCashDaemon
+    SESSIONCLS = SmartCashElectrumX
+
+    @classmethod
+    def header_hash(cls, header):
+        '''Given a header return the hash.'''
+        return cls.HEADER_HASH(header)

electrumx/lib/tx.py

@@ -623,3 +623,18 @@ class DeserializerDecred(Deserializer):
             expiry,
             witness
         ), tx_hash, self.cursor - start
+
+
+class DeserializerSmartCash(Deserializer):
+
+    @staticmethod
+    def keccak(data):
+        from Cryptodome.Hash import keccak
+        keccak_hash = keccak.new(digest_bits=256)
+        keccak_hash.update(data)
+        return keccak_hash.digest()
+
+    def read_tx_and_hash(self):
+        from electrumx.lib.hash import sha256
+        start = self.cursor
+        return self.read_tx(), sha256(self.binary[start:self.cursor])

electrumx/server/daemon.py

@@ -457,3 +457,18 @@ class PreLegacyRPCDaemon(LegacyRPCDaemon):
     async def deserialised_block(self, hex_hash):
         '''Return the deserialised block with the given hex hash.'''
         return await self._send_single('getblock', (hex_hash, False))
+
+
+class SmartCashDaemon(Daemon):
+
+    async def masternode_broadcast(self, params):
+        '''Broadcast a smartnode to the network.'''
+        return await self._send_single('smartnodebroadcast', params)
+
+    async def masternode_list(self, params):
+        '''Return the smartnode status.'''
+        return await self._send_single('smartnodelist', params)
+
+    async def smartrewards(self, params):
+        '''Return smartrewards data.'''
+        return await self._send_single('smartrewards', params)

electrumx/server/session.py

@@ -1430,3 +1430,32 @@ class DashElectrumX(ElectrumX):
             return [mn for mn in cache if mn['payee'] in payees]
         else:
             return cache
+
+
+class SmartCashElectrumX(DashElectrumX):
+    '''A TCP server that handles incoming Electrum-SMART connections.'''
+
+    def set_request_handlers(self, ptuple):
+        super().set_request_handlers(ptuple)
+        self.request_handlers.update({
+            'smartrewards.current': self.smartrewards_current,
+            'smartrewards.check': self.smartrewards_check
+        })
+
+    async def smartrewards_current(self):
+        '''Returns the current smartrewards info.'''
+        result = await self.daemon_request('smartrewards', ['current'])
+        if result is not None:
+            return result
+        return None
+
+    async def smartrewards_check(self, addr):
+        '''
+        Returns the status of an address
+
+        addr: a single smartcash address
+        '''
+        result = await self.daemon_request('smartrewards', ['check', addr])
+        if result is not None:
+            return result
+        return None

setup.py

@@ -12,6 +12,7 @@ setuptools.setup(
     # "blake256" package is required to sync Decred network.
     # "xevan_hash" package is required to sync Xuez network.
     # "groestlcoin_hash" package is required to sync Groestlcoin network.
+    # "pycryptodomex" package is required to sync SmartCash network.
     install_requires=['aiorpcX>=0.10.1,<0.11', 'attrs',
                       'plyvel', 'pylru', 'aiohttp >= 2'],
     packages=setuptools.find_packages(include=('electrumx*',)),

tests/blocks/smartcash_mainnet_200000.json

@@ -0,0 +1,16 @@
+{
+  "hash": "000000000000d1772b7e3ffc661133c252faedcc52b3dd186b83da4b2f2f8cbe",
+  "size": 692,
+  "height": 200000,
+  "merkleroot": "f8f490671e499b66a73e3fe37f3b2288b82e3d359fc3c18938f32e9e830928d2",
+  "tx": [
+    "c19c6e1dd5ca9d06b046a2962782293cdd9be39bb006ce65add0ad945c9eaeec",
+    "0151e788a439caa317dce1cf5a754f0b5bb8639d4f1073e89d3baa450fda5306",
+    "a4217a9a787b66a597efae52b24e2c88d1700cf5661bac6ed58c718f90a98b97"
+  ],
+  "time": 1511678597,
+  "nonce": 3716569074,
+  "bits": "1b01c757",
+  "previousblockhash": "0000000000016e6bcdbe8af532509cf5aaf99e74b8b0346a59d360beb460e0bf",
+  "block": "02000000bfe060b4be60d3596a34b0b8749ef9aaf59c5032f58abecd6b6e010000000000d22809839e2ef33889c1c39f353d2eb888223b7fe33f3ea7669b491e6790f4f885621a5a57c7011bf25786dd0301000000010000000000000000000000000000000000000000000000000000000000000000ffffffff2703400d03062f503253482f0485621a5a087ffd6961cf0000000d2f6e6f64655374726174756d2f000000000240e6202d040000001976a9145dd99e7cfdee45d47edf9b2d92df27961241145e88ac40412d574f0000001976a9144a7018841fc6003d66b6a1b859e73b4cc3e621b488ac0000000001000000019521d2cde436c42b81158198b2cd8b9d52dc093d4f8465163ecc98a134dd12a6000000006b483045022100ddad79fd8a9fa0ca664ac8e91aa7c8dcc7cad8c4894e1a7d9143de4bdedeef9f022013dfd0605b50d22d2675e21a27255540fa48263ab44801d287a61883ee8074c3012103635fd7668414f4eb1d6088cac789e58709cae9c3c07a00791f415164b67cda4cffffffff0281c03b9e000000001976a9141dc91417504cb86ac5eea49d85a4d3fd51f72db988acbc91e5cb000000001976a914ecdccf8dec8482314050acd84f72d6559a19b30d88ac0000000001000000011a8b6c07eb61bb5e9910de4d31a410a5b69de2bde8a3cb9df599ddaccd373d95000000006c493046022100d1bf91d45a0d53bfad9aa0d226be625f667641fa53661e2cdc21526cf84ede21022100d0cbf38220d789c9b1a5c6288ebfe2e5ddd4ceb5714881d0f43a27d06a6e9649012103133678a3c4d9855f4a25ab318619fe68e0ed67d67c14fa9be678cb561a75f71bffffffff027fd500fc000000001976a914098cd3573bcca56674eb6eeb51fad42ff353945088ac58bda83d000000001976a91456feb1c72217b8f45aa4183da1c81b314a47f5f388ac00000000"
+}

tests/lib/test_addresses.py

@@ -67,6 +67,8 @@ addresses = [
      "ab72728952c06dfc0f6cf21449dd645422731ec4", "eb3a3155215538d51de7cc"),
     (coins.TokenPay, "TDE2X28FGtckatxuP3d8s3V726G4TLNHpT",
      "23b5dd9b7b402388c7a40bc88c261f3178acf30d", "7c7bdf0e0713f3752f4b88"),
+    (coins.SmartCash, "SQFDM9NtRRmpHebq3H5RA3qpGJfGqp8Xgw",
+     "206168f5322583ff37f8e55665a4789ae8963532", "b8cb80b26e8932f5b12a7e"),
 ]