app.lisk: Add lisk_get_public_key

src/apps/lisk/__init__.py

@@ -1,11 +1,18 @@
 from trezor.wire import register, protobuf_workflow
 from trezor.messages.wire_types import \
-    LiskGetAddress
+    LiskGetAddress, LiskGetPublicKey
 
 
 def dispatch_LiskGetAddress(*args, **kwargs):
     from .get_address import layout_lisk_get_address
     return layout_lisk_get_address(*args, **kwargs)
 
+
+def dispatch_LiskGetPublicKey(*args, **kwargs):
+    from .get_public_key import lisk_get_public_key
+    return lisk_get_public_key(*args, **kwargs)
+
+
 def boot():
+    register(LiskGetPublicKey, protobuf_workflow, dispatch_LiskGetPublicKey)
     register(LiskGetAddress, protobuf_workflow, dispatch_LiskGetAddress)

src/apps/lisk/get_public_key.py

@@ -0,0 +1,20 @@
+from apps.wallet.get_public_key import _show_pubkey
+from .helpers import LISK_CURVE
+
+
+async def lisk_get_public_key(ctx, msg):
+    from trezor.messages.LiskPublicKey import LiskPublicKey
+    from trezor.crypto.curve import ed25519
+    from ..common import seed
+
+    address_n = msg.address_n or ()
+
+    node = await seed.derive_node(ctx, address_n, LISK_CURVE)
+
+    seckey = node.private_key()
+    public_key = ed25519.publickey(seckey)
+
+    if msg.show_display:
+        await _show_pubkey(ctx, public_key)
+
+    return LiskPublicKey(public_key=public_key)