Start from seed.

decred/examples/drain_xpriv.py

@@ -2,7 +2,8 @@
 """
 Copyright (c) 2020, The Decred developers
 
-This example script will dump all funds located in an xpriv to a specified address.
+This example script will dump all funds located in an account derived from the
+supplied xpriv seed to a specified address.
 """
 import os
 from urllib.parse import urlunsplit
@@ -22,6 +23,9 @@
 EXTERNAL = 1
 FEE_RATE = 10000
 GAP_LIMIT = 20
+ACCT_NUM = 0
+COIN_TYPE = 20
+PURPOSE = 44
 
 
 def cfg(isTestnet):
@@ -229,8 +233,11 @@ def main():
 
     # Printing a newline.
     print()
-    internal = xpriv.child(INTERNAL)
-    external = xpriv.child(EXTERNAL)
+    purpose = xpriv.child(crypto.HARDENED_KEY_START + PURPOSE)
+    cointype = purpose.child(crypto.HARDENED_KEY_START + COIN_TYPE)
+    acct = cointype.child(crypto.HARDENED_KEY_START + ACCT_NUM)
+    internal = acct.child(INTERNAL)
+    external = acct.child(EXTERNAL)
 
     dcrdConfig = cfg(isTestnet)
     node = rpc.Client(