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https://github.com/trezor/trezor-firmware.git
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78 lines
2.5 KiB
Python
78 lines
2.5 KiB
Python
from trezor import wire
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from trezor.messages import InputScriptType
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from trezor.messages.HDNodeType import HDNodeType
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from trezor.messages.PublicKey import PublicKey
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from apps.common import HARDENED, coins, layout, seed
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from .keychain import get_keychain_for_coin
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async def get_keychain_for_curve(ctx: wire.Context, curve_name: str) -> seed.Keychain:
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"""Set up a keychain for SLIP-13 and SLIP-17 namespaces with a specified curve."""
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namespaces = [
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(curve_name, [13 | HARDENED]),
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(curve_name, [17 | HARDENED]),
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]
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return await seed.get_keychain(ctx, namespaces)
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async def get_public_key(ctx, msg):
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script_type = msg.script_type or InputScriptType.SPENDADDRESS
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if msg.ecdsa_curve_name is not None:
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# If a curve name is provided, disallow coin-specific features.
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if (
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msg.coin_name is not None
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or msg.script_type is not InputScriptType.SPENDADDRESS
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):
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raise wire.DataError(
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"Cannot use coin_name or script_type with ecdsa_curve_name"
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)
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coin = coins.by_name("Bitcoin")
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# only allow SLIP-13/17 namespaces
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keychain = await get_keychain_for_curve(ctx, msg.ecdsa_curve_name)
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else:
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# select curve and namespaces based on the requested coin properties
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keychain, coin = await get_keychain_for_coin(ctx, msg.coin_name)
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node = keychain.derive(msg.address_n)
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if (
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script_type in [InputScriptType.SPENDADDRESS, InputScriptType.SPENDMULTISIG]
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and coin.xpub_magic is not None
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):
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node_xpub = node.serialize_public(coin.xpub_magic)
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elif (
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coin.segwit
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and script_type == InputScriptType.SPENDP2SHWITNESS
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and coin.xpub_magic_segwit_p2sh is not None
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):
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node_xpub = node.serialize_public(coin.xpub_magic_segwit_p2sh)
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elif (
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coin.segwit
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and script_type == InputScriptType.SPENDWITNESS
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and coin.xpub_magic_segwit_native is not None
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):
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node_xpub = node.serialize_public(coin.xpub_magic_segwit_native)
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else:
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raise wire.DataError("Invalid combination of coin and script_type")
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pubkey = node.public_key()
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if pubkey[0] == 1:
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pubkey = b"\x00" + pubkey[1:]
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node_type = HDNodeType(
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depth=node.depth(),
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child_num=node.child_num(),
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fingerprint=node.fingerprint(),
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chain_code=node.chain_code(),
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public_key=pubkey,
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)
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if msg.show_display:
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await layout.show_pubkey(ctx, pubkey)
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return PublicKey(node=node_type, xpub=node_xpub)
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