Pivx support (#568)

* Correct function doc string

* Add PIVX support

electrumx/lib/coins.py

@@ -2100,3 +2100,42 @@ class GroestlcoinTestnet(Groestlcoin):
         '7frvhgofuf522b5i.onion t',
         'aocojvqcybdoxekv.onion t',
     ]
+
+
+class Pivx(Coin):
+    NAME = "Pivx"
+    SHORTNAME = "PIVX"
+    NET = "mainnet"
+    XPUB_VERBYTES = bytes.fromhex("022D2533")
+    XPRV_VERBYTES = bytes.fromhex("0221312B")
+    P2PKH_VERBYTE = bytes.fromhex("1e")
+    P2SH_VERBYTES = [bytes.fromhex("0d")]
+    WIF_BYTE = bytes.fromhex("d4")
+    GENESIS_HASH = ('0000041e482b9b9691d98eefb4847340'
+                    '5c0b8ec31b76df3797c74a78680ef818')
+    BASIC_HEADER_SIZE = 80
+    HDR_V4_SIZE = 112
+    HDR_V4_HEIGHT = 863787
+    HDR_V4_START_OFFSET = HDR_V4_HEIGHT * BASIC_HEADER_SIZE
+    TX_COUNT = 2930206
+    TX_COUNT_HEIGHT = 1299212
+    TX_PER_BLOCK = 2
+    RPC_PORT = 51473
+
+    @classmethod
+    def static_header_offset(cls, height):
+        assert cls.STATIC_BLOCK_HEADERS
+        if height >= cls.HDR_V4_HEIGHT:
+            relative_v4_offset = (height - cls.HDR_V4_HEIGHT) * cls.HDR_V4_SIZE
+            return cls.HDR_V4_START_OFFSET + relative_v4_offset
+        else:
+            return height * cls.BASIC_HEADER_SIZE
+
+    @classmethod
+    def header_hash(cls, header):
+        version, = struct.unpack('<I', header[:4])
+        if version >= 4:
+            return super().header_hash(header)
+        else:
+            import quark_hash
+            return quark_hash.getPoWHash(header)

electrumx/server/db.py

@@ -579,9 +579,7 @@ class DB(object):
             self.write_utxo_state(batch)
 
     async def all_utxos(self, hashX):
-        '''Return all UTXOs for an address sorted in no particular order.  By
-        default yields at most 1000 entries.
-        '''
+        '''Return all UTXOs for an address sorted in no particular order.'''
         def read_utxos():
             utxos = []
             utxos_append = utxos.append

tests/blocks/pivx_mainnet_10000.json

@@ -0,0 +1,14 @@
+{
+  "hash": "00000000003ce77135d15257a57f7508b8c5021372de2eae554f3142b60944cc",
+  "size": 231,
+  "height": 10000,
+  "merkleroot": "bd27e18a8abbd501b775d32fc6402a1a474a0517c1c8b04b9d487b0203f6b0f0",
+  "tx": [
+    "bd27e18a8abbd501b775d32fc6402a1a474a0517c1c8b04b9d487b0203f6b0f0"
+  ],
+  "time": 1454814715,
+  "nonce": 14876727,
+  "bits": "1c06b486",
+  "previousblockhash": "00000000023fecac81bc148c7ab26a0190dbabeac2e8e260f62dff5205596f02",
+  "block": "03000000026f590552ff2df660e2e8c2eaabdb90016ab27a8c14bc81acec3f0200000000f0b0f603027b489d4bb0c8c117054a471a2a40c62fd375b701d5bb8a8ae127bdfbb5b65686b4061c3700e3000101000000010000000000000000000000000000000000000000000000000000000000000000ffffffff1f02102704fbb5b65608380001169c6108000d2f6e6f64655374726174756d2f000000000200c817a8040000001976a91493d5f8ec14e203ef275ebfe942bc6a1e2784f95088ac00f2052a010000001976a914d6716d39693e034596a1e8546b4d65e4a06159cc88ac00000000"
+}

tests/blocks/pivx_mainnet_1000000.json

@@ -0,0 +1,15 @@
+{
+  "hash": "bb6127b99bf96b150c86ac38fde17c47d6c95b460c462ef45fd5043a44479068",
+  "size": 461,
+  "height": 1000000,
+  "merkleroot": "ecafe8267cbc5e4b6f4aec0978b02f0ba47a19828b0f8780e25685184d61c9e2",
+  "tx": [
+    "290871d1dc1673069a4c3efef424278b377becbff0c776e20972d212daa4a3d4",
+    "e217611a8db9ec5994632e1f66727c53e0ba09c406f6c993c8d52f5474efe620"
+  ],
+  "time": 1516510311,
+  "nonce": 0,
+  "bits": "1a7128a9",
+  "previousblockhash": "795ab132be197a0a173cbe3590660235d906e0011052a10206244e0eae4b5152",
+  "block": "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"
+}