diff --git a/electrumx/lib/coins.py b/electrumx/lib/coins.py
index b0357931e..1e5230647 100644
--- a/electrumx/lib/coins.py
+++ b/electrumx/lib/coins.py
@@ -2442,3 +2442,28 @@ def header_hash(cls, header):
         '''Given a header return the hash.'''
         import x13_hash
         return x13_hash.getPoWHash(header)
+
+# source: https://github.com/obsidianplatform
+class Obsidian(Coin):
+    NAME = "Obsidian"
+    SHORTNAME = "ODN"
+    NET = "mainnet"
+    XPUB_VERBYTES = bytes.fromhex("0488c21e")
+    XPRV_VERBYTES = bytes.fromhex("0488b2dd")
+    P2PKH_VERBYTE = bytes.fromhex("4b")
+    P2SH_VERBYTES = [bytes.fromhex("7d")]
+    WIF_BYTE = bytes.fromhex("cb")
+    GENESIS_HASH = ('0000006dd8a92f58e952fa61c9402b74'
+                    'a381a69d1930fb5cc12c73273fab5f0a')
+    RPC_PORT = 56661
+    TX_COUNT = 1067887
+    TX_PER_BLOCK = 2
+    TX_COUNT_HEIGHT = 500000
+    DAEMON = daemon.LegacyRPCDaemon
+
+    @classmethod
+    def header_hash(cls, header):
+        '''Given a header return the hash.'''
+        from hashlib import sha512
+        return sha512(header).digest()[:32]
+
diff --git a/tests/blocks/obsidian_mainnet_1.json b/tests/blocks/obsidian_mainnet_1.json
new file mode 100644
index 000000000..4f7edac41
--- /dev/null
+++ b/tests/blocks/obsidian_mainnet_1.json
@@ -0,0 +1,14 @@
+{
+  "hash": "1dc7864236293c4243981e4b530796fde0438bf8f659b3fb00b047c6da1dad28",
+  "size": 176,
+  "height": 1,
+  "merkleroot": "aa5f626959c5b35d9b104d273756cdf37e2a8e696cd765dc6ec671dce1707951",
+  "tx": [
+    "aa5f626959c5b35d9b104d273756cdf37e2a8e696cd765dc6ec671dce1707951"
+  ],
+  "time": 1503607998,
+  "nonce": 0,
+  "bits": "1e00ffff",
+  "previousblockhash": "0000006dd8a92f58e952fa61c9402b74a381a69d1930fb5cc12c73273fab5f0a",
+  "block": "070000000a5fab3f27732cc15cfb30199da681a3742b40c961fa52e9582fa9d86d000000517970e1dc71c66edc65d76c698e2a7ef3cd5637274d109b5db3c55969625faabe3c9f59ffff001e000000000101000000be3c9f59010000000000000000000000000000000000000000000000000000000000000000ffffffff055103e80a06ffffffff010084d717000000001976a914fa21f890dbdffdff1b2637cf21758a4e9815b24988ac0000000000"
+}
diff --git a/tests/blocks/obsidian_mainnet_100000.json b/tests/blocks/obsidian_mainnet_100000.json
new file mode 100644
index 000000000..b32798999
--- /dev/null
+++ b/tests/blocks/obsidian_mainnet_100000.json
@@ -0,0 +1,15 @@
+{
+  "hash": "188278a41dabb40550075bba3e511273ccabb14520c61b5110ca3b77663136ab",
+  "size": 445,
+  "height": 100000,
+  "merkleroot": "3d8290a988dbe25730959689b0657845ca802b044d01999e7b8b4026273bb138",
+  "tx": [
+    "ed01c16f8a74bdd0a20f25e6f503d6324204bc7dc89c58023653c6276d2b1871",
+    "c964fc2c509f812f014f0c31d675fd4ba51f12afd36d08c001d5640727c1a414"
+  ],
+  "time": 1510242048,
+  "nonce": 0,
+  "bits": "1a062c93",
+  "previousblockhash": "3044495db50a3c7d0414d1fdef6707d2fc257cdf5bea296cef833223f8521f2a",
+  "block": "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"
+}