core: show xpubs in GetAddress for multisig

also fix not showing MultisigRedeemScriptType.nodes correctly

core/src/apps/common/layout.py

@@ -6,6 +6,7 @@ from trezor.messages import ButtonRequestType
 from trezor.ui.button import ButtonDefault
 from trezor.ui.container import Container
 from trezor.ui.qr import Qr
+from trezor.ui.scroll import Paginated
 from trezor.ui.text import Text
 from trezor.utils import chunks
 
@@ -13,12 +14,16 @@ from apps.common import HARDENED
 from apps.common.confirm import confirm, require_confirm
 
 if False:
-    from typing import Iterable, Iterator
+    from typing import Iterable, Iterator, List
     from trezor import wire
 
 
 async def show_address(
-    ctx: wire.Context, address: str, desc: str = "Confirm address", network: str = None
+    ctx: wire.Context,
+    address: str,
+    desc: str = "Confirm address",
+    cancel: str = "QR",
+    network: str = None,
 ) -> bool:
     text = Text(desc, ui.ICON_RECEIVE, ui.GREEN)
     if network is not None:
@@ -29,13 +34,16 @@ async def show_address(
         ctx,
         text,
         code=ButtonRequestType.Address,
-        cancel="QR",
+        cancel=cancel,
         cancel_style=ButtonDefault,
     )
 
 
 async def show_qr(
-    ctx: wire.Context, address: str, desc: str = "Confirm address"
+    ctx: wire.Context,
+    address: str,
+    desc: str = "Confirm address",
+    cancel: str = "Address",
 ) -> bool:
     QR_X = const(120)
     QR_Y = const(115)
@@ -48,7 +56,7 @@ async def show_qr(
         ctx,
         content,
         code=ButtonRequestType.Address,
-        cancel="Address",
+        cancel=cancel,
         cancel_style=ButtonDefault,
     )
 
@@ -60,6 +68,22 @@ async def show_pubkey(ctx: wire.Context, pubkey: bytes) -> None:
     await require_confirm(ctx, text, ButtonRequestType.PublicKey)
 
 
+async def show_xpub(ctx: wire.Context, xpub: str, desc: str, cancel: str) -> bool:
+    pages = []  # type: List[ui.Component]
+    for lines in chunks(list(chunks(xpub, 16)), 5):
+        text = Text(desc, ui.ICON_RECEIVE, ui.GREEN)
+        text.mono(*lines)
+        pages.append(text)
+
+    return await confirm(
+        ctx,
+        Paginated(pages),
+        code=ButtonRequestType.PublicKey,
+        cancel=cancel,
+        cancel_style=ButtonDefault,
+    )
+
+
 def split_address(address: str) -> Iterator[str]:
     return chunks(address, 17)
 

core/src/apps/wallet/get_address.py

@@ -1,11 +1,37 @@
+from trezor.crypto import bip32
 from trezor.messages import InputScriptType
 from trezor.messages.Address import Address
 
 from apps.common import coins
-from apps.common.layout import address_n_to_str, show_address, show_qr
+from apps.common.layout import address_n_to_str, show_address, show_qr, show_xpub
 from apps.common.paths import validate_path
 from apps.wallet.sign_tx import addresses
 
+if False:
+    from typing import List
+    from trezor.messages import HDNodeType
+    from trezor import wire
+    from apps.common.coininfo import CoinInfo
+
+
+async def show_xpubs(
+    ctx: wire.Context, coin: CoinInfo, pubnodes: List[HDNodeType]
+) -> bool:
+    for i, x in enumerate(pubnodes):
+        cancel = "Next" if i < len(pubnodes) - 1 else "Address"
+        node = bip32.HDNode(
+            depth=x.depth,
+            fingerprint=x.fingerprint,
+            child_num=x.child_num,
+            chain_code=x.chain_code,
+            public_key=x.public_key,
+            curve_name=coin.curve_name,
+        )
+        xpub = node.serialize_public(coin.xpub_magic)
+        if await show_xpub(ctx, xpub, desc="XPUB #%d" % (i + 1), cancel=cancel):
+            return True
+    return False
+
 
 async def get_address(ctx, msg, keychain):
     coin_name = msg.coin_name or "Bitcoin"
@@ -33,14 +59,24 @@ async def get_address(ctx, msg, keychain):
 
     if msg.show_display:
         if msg.multisig:
-            desc = "Multisig %d of %d" % (msg.multisig.m, len(msg.multisig.pubkeys))
+            if msg.multisig.nodes:
+                pubnodes = msg.multisig.nodes
+            else:
+                pubnodes = [hd.node for hd in msg.multisig.pubkeys]
+            desc = "Multisig %d of %d" % (msg.multisig.m, len(pubnodes))
+            while True:
+                if await show_address(ctx, address_short, desc=desc):
+                    break
+                if await show_qr(ctx, address_qr, desc=desc, cancel="XPUBs"):
+                    break
+                if await show_xpubs(ctx, coin, pubnodes):
+                    break
         else:
             desc = address_n_to_str(msg.address_n)
-
-        while True:
-            if await show_address(ctx, address_short, desc=desc):
-                break
-            if await show_qr(ctx, address_qr, desc=desc):
-                break
+            while True:
+                if await show_address(ctx, address_short, desc=desc):
+                    break
+                if await show_qr(ctx, address_qr, desc=desc):
+                    break
 
     return Address(address=address)