ripple: add destination tag

src/apps/ripple/layout.py

@@ -16,6 +16,13 @@ async def require_confirm_fee(ctx, fee):
     await require_confirm(ctx, text, ButtonRequestType.ConfirmOutput)
 
 
+async def require_confirm_destination_tag(ctx, tag):
+    text = Text("Confirm tag", ui.ICON_SEND, icon_color=ui.GREEN)
+    text.normal("Destination tag:")
+    text.bold(str(tag))
+    await require_confirm(ctx, text, ButtonRequestType.ConfirmOutput)
+
+
 async def require_confirm_tx(ctx, to, value):
 
     text = Text("Confirm sending", ui.ICON_SEND, icon_color=ui.GREEN)

src/apps/ripple/serialize.py

@@ -31,6 +31,7 @@ FIELDS_MAP = {
     "flags": {"type": FIELD_TYPE_INT32, "key": 2},
     "txnSignature": {"type": FIELD_TYPE_VL, "key": 4},
     "lastLedgerSequence": {"type": FIELD_TYPE_INT32, "key": 27},
+    "destinationTag": {"type": FIELD_TYPE_INT32, "key": 14},
 }
 
 TRANSACTION_TYPES = {"Payment": 0}
@@ -42,6 +43,7 @@ def serialize(msg: RippleSignTx, source_address: str, pubkey=None, signature=Non
     write(w, FIELDS_MAP["type"], TRANSACTION_TYPES["Payment"])
     write(w, FIELDS_MAP["flags"], msg.flags)
     write(w, FIELDS_MAP["sequence"], msg.sequence)
+    write(w, FIELDS_MAP["destinationTag"], msg.payment.destination_tag)
     write(w, FIELDS_MAP["lastLedgerSequence"], msg.last_ledger_sequence)
     write(w, FIELDS_MAP["amount"], msg.payment.amount)
     write(w, FIELDS_MAP["fee"], msg.fee)

src/apps/ripple/sign_tx.py

@@ -23,6 +23,8 @@ async def sign_tx(ctx, msg: RippleSignTx, keychain):
     to_sign = get_network_prefix() + tx
 
     check_fee(msg.fee)
+    if msg.payment.destination_tag is not None:
+        await layout.require_confirm_destination_tag(ctx, msg.payment.destination_tag)
     await layout.require_confirm_fee(ctx, msg.fee)
     await layout.require_confirm_tx(ctx, msg.payment.destination, msg.payment.amount)