Add a Python/Jython version of the getting started tutorial, thanks to Richard Green.

examples/src/main/python/forwarding.py

@@ -0,0 +1,93 @@
+# An example of how to use Jython to implement the "Getting Started" tutorial app, which receives coins and simply
+# sends them on (minus a fee).
+
+__author__ = "richard 'ragmondo' green"
+
+import sys
+
+# Change this to point to where you have a copy of the bitcoinj.jar
+sys.path.append(r"/path/to/bitcoinj-0.12-SNAPSHOT-bundled.jar")
+
+# This is the address to forward all payments to. Change this (unless you want to send me some testnet coins)
+my_address_text = "mzEjmna15T7DXj4HC9MBEG2UJzgFfEYtFo"
+
+# 0 for instant send, 1 for a more realistic example
+# if the wallet has no btc in it, then set to 1.
+# if it has a confirmed balance in it, then you can set it to 0.
+confirm_wait = 1
+
+from com.google.bitcoin.core import *
+
+import com.google.bitcoin.crypto.KeyCrypterException
+import com.google.bitcoin.params.MainNetParams
+from com.google.bitcoin.kits import WalletAppKit
+
+from com.google.common.util.concurrent import FutureCallback
+from com.google.common.util.concurrent import Futures
+
+import java.io.File
+
+import traceback,sys
+
+def loud_exceptions(*args):
+    def _trace(func):
+        def wrapper(*args, **kwargs):
+            try:
+                func(*args, **kwargs)
+            except Exception, e:
+                traceback.print_exc()
+                print "** python exception ",e
+                raise
+            except java.lang.Exception,e:
+                traceback.print_exc()
+                print "** java exception",e
+                raise
+        return wrapper
+
+    if len(args) == 1 and callable(args[0]):
+        return _trace(args[0])
+    else:
+        return _trace
+
+@loud_exceptions
+def forwardCoins(tx,w,pg,addr):
+    v = tx.getValueSentToMe(w)
+    amountToSend = v.subtract(Transaction.REFERENCE_DEFAULT_MIN_TX_FEE)
+   # v_bigint = java.math.BigInteger(str(v))
+    sr = w.sendCoins(pg, addr, amountToSend)
+
+class SenderListener(AbstractWalletEventListener):
+    def __init__(self,pg,address):
+        super(SenderListener,self). __init__()
+        self.peerGroup = pg
+        self.address = address
+
+    @loud_exceptions
+    def onCoinsReceived(self, w, tx, pb, nb):
+        print "tx received", tx
+        v = tx.getValueSentToMe(w)
+
+        class myFutureCallback(FutureCallback):
+            @loud_exceptions
+            def onSuccess(selfx, txn):
+                forwardCoins(tx,w,self.peerGroup, self.address)
+
+        print "creating %s confirm callback..." % (confirm_wait)
+        Futures.addCallback(tx.getConfidence().getDepthFuture(confirm_wait), myFutureCallback())
+
+if __name__ == "__main__":
+    params = com.google.bitcoin.params.TestNet3Params.get()
+    my_address = Address(params,my_address_text)
+    filePrefix = "forwarding-service-testnet"
+    f = java.io.File(".")
+    kit = WalletAppKit(params, f, filePrefix);
+    print "starting and initialising (please wait).."
+    kit.startAsync()
+    kit.awaitRunning()
+    pg = kit.peerGroup()
+    wallet = kit.wallet()
+    sendToAddress = kit.wallet().currentReceiveKey().toAddress(params)
+    print "send test coins to ", sendToAddress, "qrcode - http://qrickit.com/api/qr?d=%s" % (sendToAddress) # no affiliation with qrickit..
+    sl = SenderListener(pg,my_address)
+    wallet.addEventListener(sl)
+    print "finished initialising .. now in main event loop"