Add support for Sparks (SPK) (#721)

electrumx/lib/coins.py

@@ -2641,3 +2641,27 @@ class MyriadcoinTestnet(Myriadcoin):
     WIF_BYTE = bytes.fromhex("ef")
     GENESIS_HASH = ('0000017ce2a79c8bddafbbe47c004aa9'
                     '2b20678c354b34085f62b762084b9788')
+
+
+class Sparks(Coin):
+    NAME = "Sparks"
+    SHORTNAME = "SPK"
+    NET = "mainnet"
+    XPUB_VERBYTES = bytes.fromhex("0488B21E")
+    XPRV_VERBYTES = bytes.fromhex("0488ADE4")
+    GENESIS_HASH = ('00000a5c6ddfaac5097218560d5b92d4'
+                    '16931cfeba1abf10c81d1d6a232fc8ea')
+    P2PKH_VERBYTE = bytes.fromhex("26")
+    P2SH_VERBYTES = [bytes.fromhex("0A")]
+    WIF_BYTE = bytes.fromhex("C6")
+    TX_COUNT_HEIGHT = 117400
+    TX_COUNT = 162310
+    TX_PER_BLOCK = 4
+    RPC_PORT = 8818
+    SESSIONCLS = DashElectrumX
+    DAEMON = daemon.DashDaemon
+
+    @classmethod
+    def header_hash(cls, header):
+        import neoscrypt
+        return neoscrypt.getPoWHash(header)

tests/blocks/sparks_mainnet_1000.json

@@ -0,0 +1,14 @@
+{
+  "hash": "00000000020ff055aa61a4d11d1d66730d7e0534dc8570dc2d40c45b675b2582",
+  "size": 196,
+  "height": 1000,
+  "merkleroot": "665fabda52881b52894d5b30feead9755d0679ee8fa832f26a82bba039c25745",
+  "tx": [
+    "665fabda52881b52894d5b30feead9755d0679ee8fa832f26a82bba039c25745"
+  ],
+  "time": 1514021201,
+  "nonce": 3752529043,
+  "bits": "1c027039",
+  "previousblockhash": "00000000022df0e0facb9d2c6f64636cf1d8452ccfd8d3243fa83caa8a6d9259",
+  "block": "0000002059926d8aaa3ca83f24d3d8cf2c45d8f16c63646f2c9dcbfae0f02d02000000004557c239a0bb826af232a88fee79065d75d9eafe305b4d89521b8852daab5f6651213e5a3970021c930cabdf0102000000010000000000000000000000000000000000000000000000000000000000000000ffffffff1e02e8030451213e5a0881000638d2000000416c744d696e65722e4e657400000000000100d2496b000000001976a9143d619fd153f2872791be572f222c0b896517f91288ac00000000"
+}