wallet: use coin's .curve_name

src/apps/wallet/get_address.py

@@ -9,7 +9,7 @@ async def get_address(ctx, msg):
     coin_name = msg.coin_name or 'Bitcoin'
     coin = coins.by_name(coin_name)
 
-    node = await seed.derive_node(ctx, msg.address_n)
+    node = await seed.derive_node(ctx, msg.address_n, curve_name=coin.curve_name)
     address = addresses.get_address(msg.script_type, coin, node, msg.multisig)
     address_short = addresses.address_short(coin, address)
 

src/apps/wallet/get_public_key.py

@@ -11,13 +11,12 @@ from ubinascii import hexlify
 
 async def get_public_key(ctx, msg):
     coin_name = msg.coin_name or 'Bitcoin'
+    coin = coins.by_name(coin_name)
 
     curve_name = msg.ecdsa_curve_name
     if not curve_name:
-        node = await seed.derive_node(ctx, msg.address_n)
-    else:
-        node = await seed.derive_node(ctx, msg.address_n, curve_name=curve_name)
-    coin = coins.by_name(coin_name)
+        curve_name = coin.curve_name
+    node = await seed.derive_node(ctx, msg.address_n, curve_name=curve_name)
 
     node_xpub = node.serialize_public(coin.xpub_magic)
     pubkey = node.public_key()

src/apps/wallet/sign_message.py

@@ -18,7 +18,7 @@ async def sign_message(ctx, msg):
 
     await require_confirm_sign_message(ctx, message)
 
-    node = await seed.derive_node(ctx, address_n)
+    node = await seed.derive_node(ctx, address_n, curve_name=coin.curve_name)
     seckey = node.private_key()
 
     address = get_address(script_type, coin, node)

src/apps/wallet/sign_tx/__init__.py

@@ -2,7 +2,7 @@ from trezor import ui, wire
 from trezor.messages.MessageType import TxAck
 from trezor.messages.TxRequest import TxRequest
 from trezor.messages.RequestType import TXFINISHED
-from apps.common import seed
+from apps.common import seed, coins
 from apps.wallet.sign_tx.helpers import UiConfirmOutput, UiConfirmTotal, UiConfirmFeeOverThreshold, UiConfirmForeignAddress
 
 
@@ -10,8 +10,10 @@ from apps.wallet.sign_tx.helpers import UiConfirmOutput, UiConfirmTotal, UiConfi
 async def sign_tx(ctx, msg):
     from apps.wallet.sign_tx import layout, progress, signing
 
+    coin_name = msg.coin_name or 'Bitcoin'
+    coin = coins.by_name(coin_name)
     # TODO: rework this so we don't have to pass root to signing.sign_tx
-    root = await seed.derive_node(ctx, [])
+    root = await seed.derive_node(ctx, [], curve_name=coin.curve_name)
 
     signer = signing.sign_tx(msg, root)
     res = None