1 files changed, 136 insertions, 0 deletions
diff --git a/qa/rpc-tests/util.py b/qa/rpc-tests/util.py
new file mode 100644
index 0000000000..fbb27ae2df
--- /dev/null
+++ b/qa/rpc-tests/util.py
@@ -0,0 +1,136 @@
+#
+# Helpful routines for regression testing
+#
+
+# Add python-bitcoinrpc to module search path:
+import os
+import sys
+sys.path.append(os.path.join(os.path.dirname(os.path.abspath(__file__)), "python-bitcoinrpc"))
+
+from decimal import Decimal
+import json
+import shutil
+import subprocess
+import time
+
+from bitcoinrpc.authproxy import AuthServiceProxy, JSONRPCException
+from util import *
+
+START_P2P_PORT=11000
+START_RPC_PORT=11100
+
+def check_json_precision():
+    """Make sure json library being used does not lose precision converting BTC values"""
+    n = Decimal("20000000.00000003")
+    satoshis = int(json.loads(json.dumps(float(n)))*1.0e8)
+    if satoshis != 2000000000000003:
+        raise RuntimeError("JSON encode/decode loses precision")
+
+def sync_blocks(rpc_connections):
+    """
+    Wait until everybody has the same block count
+    """
+    while True:
+        counts = [ x.getblockcount() for x in rpc_connections ]
+        if counts == [ counts[0] ]*len(counts):
+            break
+        time.sleep(1)
+
+def sync_mempools(rpc_connections):
+    """
+    Wait until everybody has the same transactions in their memory
+    pools
+    """
+    while True:
+        pool = set(rpc_connections[0].getrawmempool())
+        num_match = 1
+        for i in range(1, len(rpc_connections)):
+            if set(rpc_connections[i].getrawmempool()) == pool:
+                num_match = num_match+1
+        if num_match == len(rpc_connections):
+            break
+        time.sleep(1)
+        
+
+def initialize_chain(test_dir):
+    """
+    Create (or copy from cache) a 200-block-long chain and
+    4 wallets.
+    bitcoind and bitcoin-cli must be in search path.
+    """
+
+    if not os.path.isdir(os.path.join("cache", "node0")):
+        # Create cache directories, run bitcoinds:
+        bitcoinds = []
+        for i in range(4):
+            datadir = os.path.join("cache", "node"+str(i))
+            os.makedirs(datadir)
+            with open(os.path.join(datadir, "bitcoin.conf"), 'w') as f:
+                f.write("regtest=1\n");
+                f.write("rpcuser=rt\n");
+                f.write("rpcpassword=rt\n");
+                f.write("port="+str(START_P2P_PORT+i)+"\n");
+                f.write("rpcport="+str(START_RPC_PORT+i)+"\n");
+            args = [ "bitcoind", "-keypool=1", "-datadir="+datadir ]
+            if i > 0:
+                args.append("-connect=127.0.0.1:"+str(START_P2P_PORT))
+            bitcoinds.append(subprocess.Popen(args))
+            subprocess.check_output([ "bitcoin-cli", "-datadir="+datadir,
+                                      "-rpcwait", "getblockcount"])
+
+        rpcs = []
+        for i in range(4):
+            try:
+                url = "http://rt:rt@127.0.0.1:%d"%(START_RPC_PORT+i,)
+                rpcs.append(AuthServiceProxy(url))
+            except:
+                sys.stderr.write("Error connecting to "+url+"\n")
+                sys.exit(1)
+
+        import pdb; pdb.set_trace()
+
+        # Create a 200-block-long chain; each of the 4 nodes
+        # gets 25 mature blocks and 25 immature.
+        for i in range(4):
+            rpcs[i].setgenerate(True, 25)
+            sync_blocks(rpcs)
+        for i in range(4):
+            rpcs[i].setgenerate(True, 25)
+            sync_blocks(rpcs)
+        # Shut them down
+        for i in range(4):
+            rpcs[i].stop()
+
+    for i in range(4):
+        from_dir = os.path.join("cache", "node"+str(i))
+        to_dir = os.path.join(test_dir,  "node"+str(i))
+        shutil.copytree(from_dir, to_dir)
+
+bitcoind_processes = []
+
+def start_nodes(num_nodes, dir):
+    # Start bitcoinds, and wait for RPC interface to be up and running:
+    for i in range(num_nodes):
+        datadir = os.path.join(dir, "node"+str(i))
+        args = [ "bitcoind", "-datadir="+datadir ]
+        bitcoind_processes.append(subprocess.Popen(args))
+        subprocess.check_output([ "bitcoin-cli", "-datadir="+datadir,
+                                  "-rpcwait", "getblockcount"])
+    # Create&return JSON-RPC connections
+    rpc_connections = []
+    for i in range(num_nodes):
+        url = "http://rt:rt@127.0.0.1:%d"%(START_RPC_PORT+i,)
+        rpc_connections.append(AuthServiceProxy(url))
+    return rpc_connections
+
+def stop_nodes():
+    for process in bitcoind_processes:
+        process.kill()
+
+def connect_nodes(from_connection, node_num):
+    ip_port = "127.0.0.1:"+str(START_P2P_PORT+node_num)
+    from_connection.addnode(ip_port, "onetry")
+
+def assert_equal(thing1, thing2):
+    if thing1 != thing2:
+        raise AssertionError("%s != %s"%(str(thing1),str(thing2)))