mirror of
https://github.com/trezor/trezor-firmware.git
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56 lines
1.5 KiB
Python
56 lines
1.5 KiB
Python
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from apps.common import HARDENED
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"""
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We believe Ethereum should use 44'/60'/a' for everything,because it is
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account-based, rather than UTXO-based. Unfortunately, lot of Ethereum
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tools (MEW, Metamask) do not use such scheme and set a = 0 and then
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iterate the address index i. Therefore for compatibility reasons we use
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the same scheme: 44'/60'/0'/0/i and only the i is being iterated.
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"""
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def validate_full_path(path: list) -> bool:
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"""
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Validates derivation path to equal 44'/60'/0'/0/i,
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where `i` is an address index from 0 to 1 000 000.
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"""
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if len(path) != 5:
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return False
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if path[0] != 44 | HARDENED:
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return False
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if path[1] != 60 | HARDENED:
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return False
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if path[2] != 0 | HARDENED:
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return False
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if path[3] != 0:
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return False
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if path[4] > 1000000:
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return False
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return True
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def ethereum_address_hex(address, network=None):
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from ubinascii import hexlify
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from trezor.crypto.hashlib import sha3_256
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rskip60 = network is not None and network.rskip60
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hx = hexlify(address).decode()
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prefix = str(network.chain_id) + "0x" if rskip60 else ""
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hs = sha3_256(prefix + hx, keccak=True).digest()
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h = ""
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for i in range(20):
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l = hx[i * 2]
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if hs[i] & 0x80 and l >= "a" and l <= "f":
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l = l.upper()
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h += l
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l = hx[i * 2 + 1]
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if hs[i] & 0x08 and l >= "a" and l <= "f":
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l = l.upper()
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h += l
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return "0x" + h
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