From c10c40779d9b73359ee61f85ec5f1bb88acac61d Mon Sep 17 00:00:00 2001
From: Jack Grigg <jack@z.cash>
Date: Wed, 4 Oct 2017 00:34:32 +0100
Subject: [PATCH] [Test] MiniNode: Implement Zcash coinbase

---
 qa/rpc-tests/test_framework/blocktools.py | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/qa/rpc-tests/test_framework/blocktools.py b/qa/rpc-tests/test_framework/blocktools.py
index ca566e4bc..1fe2a5dda 100644
--- a/qa/rpc-tests/test_framework/blocktools.py
+++ b/qa/rpc-tests/test_framework/blocktools.py
@@ -5,7 +5,7 @@
 #
 
 from mininode import CBlock, CTransaction, CTxIn, CTxOut, COutPoint
-from script import CScript, OP_0
+from script import CScript, OP_0, OP_EQUAL, OP_HASH160
 
 # Create a block (with regtest difficulty)
 def create_block(hashprev, coinbase, nTime=None, nBits=None):
@@ -49,11 +49,21 @@ def create_coinbase(heightAdjust = 0):
                 CScript([counter+heightAdjust, OP_0]), 0xffffffff))
     counter += 1
     coinbaseoutput = CTxOut()
-    coinbaseoutput.nValue = 50*100000000
+    coinbaseoutput.nValue = int(12.5*100000000)
     halvings = int((counter+heightAdjust)/150) # regtest
     coinbaseoutput.nValue >>= halvings
     coinbaseoutput.scriptPubKey = ""
     coinbase.vout = [ coinbaseoutput ]
+    if halvings == 0: # regtest
+        froutput = CTxOut()
+        froutput.nValue = coinbaseoutput.nValue / 5
+        # regtest
+        fraddr = bytearray([0x67, 0x08, 0xe6, 0x67, 0x0d, 0xb0, 0xb9, 0x50,
+                            0xda, 0xc6, 0x80, 0x31, 0x02, 0x5c, 0xc5, 0xb6,
+                            0x32, 0x13, 0xa4, 0x91])
+        froutput.scriptPubKey = CScript([OP_HASH160, fraddr, OP_EQUAL])
+        coinbaseoutput.nValue -= froutput.nValue
+        coinbase.vout = [ coinbaseoutput, froutput ]
     coinbase.calc_sha256()
     return coinbase