Add support for Ravencoin (RVN) (#745)

* Add support for Ravencoin (RVN)

electrumx/lib/coins.py

@@ -2805,3 +2805,52 @@ class Bitsend(Coin):
             raise CoinError('genesis block has hash {} expected {}'
                             .format(header_hex_hash, cls.GENESIS_HASH))
         return header + bytes(1)
+
+
+class Ravencoin(Coin):
+    NAME = "Ravencoin"
+    SHORTNAME = "RVN"
+    NET = "mainnet"
+    XPUB_VERBYTES = bytes.fromhex("0488B21E")
+    XPRV_VERBYTES = bytes.fromhex("0488ADE4")
+    P2PKH_VERBYTE = bytes.fromhex("3C")
+    P2SH_VERBYTES = [bytes.fromhex("7A")]
+    WIF_BYTE = bytes.fromhex("80")
+    GENESIS_HASH = ('0000006b444bc2f2ffe627be9d9e7e7a'
+                    '0730000870ef6eb6da46c8eae389df90')
+    DESERIALIZER = lib_tx.DeserializerSegWit
+    TX_COUNT = 3911020
+    TX_COUNT_HEIGHT = 602000
+    TX_PER_BLOCK = 4
+    RPC_PORT = 8766
+    REORG_LIMIT = 55
+    PEERS = [
+        'rvn.satoshi.org.uk s t',
+        'electrum-rvn.minermore.com s t',
+        '153.126.197.243 s t'
+    ]
+    @classmethod
+    def header_hash(cls, header):
+        '''Given a header return the hash.'''
+        import x16r_hash
+        return x16r_hash.getPoWHash(header)
+
+
+class RavencoinTestnet(Ravencoin):
+    NET = "testnet"
+    XPUB_VERBYTES = bytes.fromhex("043587CF")
+    XPRV_VERBYTES = bytes.fromhex("04358394")
+    P2PKH_VERBYTE = bytes.fromhex("6F")
+    P2SH_VERBYTES = [bytes.fromhex("C4")]
+    WIF_BYTE = bytes.fromhex("EF")
+    GENESIS_HASH = ('000000ecfc5e6324a079542221d00e10'
+                    '362bdc894d56500c414060eea8a3ad5a')
+    TX_COUNT = 108085
+    TX_COUNT_HEIGHT = 60590
+    TX_PER_BLOCK = 4
+    RPC_PORT = 18766
+    PEER_DEFAULT_PORTS = {'t': '50003', 's': '50004'}
+    REORG_LIMIT = 55
+    PEERS = [
+        'rvn.satoshi.org.uk s t'
+    ]

tests/blocks/ravencoin_testnet_200000.json

@@ -0,0 +1,21 @@
+{
+  "hash": "00000006580060522a1361e79685fe2a85e917de1089fe5743ab1ee35407d789",
+  "size": 281,
+  "weight": 1016,
+  "height": 200000,
+  "version": 805306368,
+  "versionHex": "30000000",
+  "merkleroot": "cb1a8b42f809dc5b443608b8056734653f619652af3012c0827372bcd7808954",
+  "tx": [
+    "cb1a8b42f809dc5b443608b8056734653f619652af3012c0827372bcd7808954"
+  ],
+  "time": 1550634944,
+  "mediantime": 1550634620,
+  "nonce": 1933676035,
+  "bits": "1d0d67c7",
+  "difficulty": 0.0745957759224163,
+  "chainwork": "00000000000000000000000000000000000000000000000000001c4a9cd47c3c",
+  "previousblockhash": "0000000bf80298a54a30bc2cabc55b1940696047577cfb87e5af1b942cfc421d",
+  "nextblockhash": "000000034d3fee7aac4a6aa33f4cff189f9e6836f0649b048d0cb953e045dd43",
+  "block": "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"
+}