add AXE support (#429)

.travis.yml

@@ -22,6 +22,7 @@ install:
   - pip install pytest-cov
   - pip install pylru
   - pip install blake256
+  - pip install x11_hash
 # command to run tests
 script: pytest --cov=server --cov=lib --cov=wallet
 # Dont report coverage from nightly

lib/coins.py

@@ -1545,3 +1545,32 @@ class DecredTestnet(Decred):
     TX_PER_BLOCK = 1000
     RPC_PORT = 19109
 
+
+class Axe(Dash):
+    NAME = "Axe"
+    SHORTNAME = "AXE"
+    NET = "mainnet"
+    XPUB_VERBYTES = bytes.fromhex("02fe52cc")
+    XPRV_VERBYTES = bytes.fromhex("02fe52f8")
+    P2PKH_VERBYTE = bytes.fromhex("37")
+    P2SH_VERBYTES = [bytes.fromhex("10")]
+    WIF_BYTE = bytes.fromhex("cc")
+    GENESIS_HASH = ('00000c33631ca6f2f61368991ce2dc03'
+                    '306b5bb50bf7cede5cfbba6db38e52e6')
+    DAEMON = daemon.DashDaemon
+    TX_COUNT = 18405
+    TX_COUNT_HEIGHT = 30237
+    TX_PER_BLOCK = 1
+    RPC_PORT = 9337
+    REORG_LIMIT = 1000
+    PEERS = []
+
+    @classmethod
+    def header_hash(cls, header):
+        '''
+        Given a header return the hash for AXE.
+        Need to download `axe_hash` module
+        Source code: https://github.com/AXErunners/axe_hash
+        '''
+        import x11_hash
+        return x11_hash.getPoWHash(header)

tests/blocks/axe_mainnet_30237.json

@@ -0,0 +1,14 @@
+{
+  "hash": "000000000013ae459f3755ac98e6dd01ad8364849cd1bcb1ca4a40f81a7ead75",
+  "size": 223,
+  "height": 30237,
+  "merkleroot": "de4266afc54356d351c11050a01165adc0e6b339268efdf1c578374b4212a266",
+  "tx": [
+    "de4266afc54356d351c11050a01165adc0e6b339268efdf1c578374b4212a266"
+  ],
+  "time": 1521830841,
+  "nonce": 1653639604,
+  "bits": "1b29c9b1",
+  "previousblockhash": "000000000014fce86cc81f0ad3135fb139764183a645d08b582a251b023f62e9",
+  "block": "00000020e9623f021b252a588bd045a683417639b15f13d30a1fc86ce8fc14000000000066a212424b3778c5f1fd8e2639b3e6c0ad6511a05010c151d35643c5af6642deb94bb55ab1c9291bb48990620101000000010000000000000000000000000000000000000000000000000000000000000000ffffffff17021d7604b94bb55a0881000001140000007969696d7000000000000200c2eb0b000000001976a914b4237f3423d7fadad0a5a4a8fd6f6bae250d59dd88ac0008af2f000000001976a914f8bc2102e0917b9537babbbaa6e15fe57307062488ac00000000"
+}