choose address based on INTERNAL flag in schedule

jmclient/schedule.py

@@ -25,6 +25,7 @@ def get_schedule(filename):
                 destaddr = destaddr.strip()
             except ValueError as e:
                 return (False, "Failed to parse schedule line: " + sl)
+            if destaddr != "INTERNAL":
                 success, errmsg = validate_address(destaddr)
                 if not success:
                     return (False, "Invalid address: " + destaddr + "," + errmsg)

jmclient/taker.py

@@ -109,6 +109,13 @@ class Taker(object):
             self.cjamount = si[1]
             self.n_counterparties = si[2]
             self.my_cj_addr = si[3]
+            #if destination is flagged "INTERNAL", choose a destination
+            #from the next mixdepth modulo the maxmixdepth
+            if self.my_cj_addr == "INTERNAL":
+                next_mixdepth = (self.mixdepth + 1) % self.wallet.max_mix_depth
+                jlog.info("Choosing a destination from mixdepth: " + str(next_mixdepth))
+                self.my_cj_addr = self.wallet.get_internal_addr(next_mixdepth)
+                jlog.info("Chose destination address: " + self.my_cj_addr)
             self.outputs = []
             self.cjfee_total = 0
             self.maker_txfee_contributions = 0

scripts/sample-schedule-for-testnet

@@ -1,3 +1,3 @@
 #sample for testing
-1, 50000000, 3, n18jvNgdCWkb5YWEMVARjBfcizg4kHcYRZ
-0, 80000000, 2, n18jvNgdCWkb5YWEMVARjBfcizg4kHcYRZ
+1, 110000000, 3, INTERNAL
+0, 20000000, 2, mnsquzxrHXpFsZeL42qwbKdCP2y1esN3qw