add listsinceblock command to Electrum

electrum-list_since_block.patch

diff --git a/lib/commands.py b/lib/commands.py
index ed351ba..7fdc459 100644
--- a/lib/commands.py
+++ b/lib/commands.py
@@ -454,6 +454,20 @@ class Commands:
             )
         return out
 
+    @command('wn')
+    def listsinceblock(self, height=-1):
+        """Get all transactions in blocks since block [height], or all transactions if omitted."""
+        out = []
+        for item in self.wallet.list_since_block(int(height)):
+            height2, pos, tx_hash, conf, delta, timestamp = item
+            out.append({
+                'height':height2,
+                'txid':tx_hash,
+                'value':float(delta)/COIN if delta is not None else None,
+                'confirmations':conf}
+            )
+        return out
+
     @command('w')
     def setlabel(self, key, label):
         """Assign a label to an item. Item may be a bitcoin address or a
@@ -661,6 +675,7 @@ command_options = {
     'pending':     (None, "--pending",     "Show only pending requests."),
     'expired':     (None, "--expired",     "Show only expired requests."),
     'paid':        (None, "--paid",        "Show only paid requests."),
+    'height':      (None, "--height",      "Block height."),
 }
 
 
diff --git a/lib/wallet.py b/lib/wallet.py
index 9717c9a..ef8f7e6 100644
--- a/lib/wallet.py
+++ b/lib/wallet.py
@@ -867,6 +867,31 @@ class Abstract_Wallet(PrintError):
 
         return h2
 
+    def list_since_block(self, lastheight=0, domain=None):
+        from collections import defaultdict
+        if domain is None:
+            domain = self.get_account_addresses(None)
+
+        tx_deltas = defaultdict(int)
+        for addr in domain:
+            h = self.get_address_history(addr)
+            for tx_hash, height in h:
+                if height <= lastheight: continue
+                delta = self.get_tx_delta(tx_hash, addr)
+                if delta is None or tx_deltas[tx_hash] is None:
+                    tx_deltas[tx_hash] = None
+                else:
+                    tx_deltas[tx_hash] += delta
+
+        history = []
+        for tx_hash, delta in tx_deltas.items():
+            conf, timestamp = self.get_confirmations(tx_hash)
+            height, pos = self.get_txpos(tx_hash)
+            history.append((height, pos, tx_hash, conf, delta, timestamp))
+        history.sort(key = lambda x: (x[0], x[1]))
+
+        return history
+
     def get_label(self, tx_hash):
         label = self.labels.get(tx_hash, '')
         return label