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https://github.com/trezor/trezor-firmware.git
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08945c48e1
This supports only fraction of the whole binary format Ripple uses. This is focused on the Payment transaction type, which is currently solely supported.
48 lines
1.4 KiB
Python
48 lines
1.4 KiB
Python
from micropython import const
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from trezor.crypto.hashlib import ripemd160, sha256
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from . import base58_ripple
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# HASH_TX_ID = const(0x54584E00) # 'TXN'
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HASH_TX_SIGN = const(0x53545800) # 'STX'
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# HASH_TX_SIGN_TESTNET = const(0x73747800) # 'stx'
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# https://developers.ripple.com/basic-data-types.html#specifying-currency-amounts
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DIVISIBILITY = const(6) # 1000000 drops equal 1 XRP
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# https://developers.ripple.com/transaction-cost.html
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MIN_FEE = const(10)
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# max is not defined officially but we check to make sure
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MAX_FEE = const(1000000) # equals 1 XRP
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FLAG_FULLY_CANONICAL = 0x80000000
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def address_from_public_key(pubkey: bytes) -> str:
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"""Extracts public key from an address
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Ripple address is in format:
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<1-byte ripple flag> <20-bytes account id> <4-bytes dSHA-256 checksum>
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- 1-byte flag is 0x00 which is 'r' (Ripple uses its own base58 alphabet)
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- 20-bytes account id is a ripemd160(sha256(pubkey))
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- checksum is first 4 bytes of double sha256(data)
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see https://developers.ripple.com/accounts.html#address-encoding
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"""
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"""Returns the Ripple address created using base58"""
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h = sha256(pubkey).digest()
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h = ripemd160(h).digest()
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address = bytearray()
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address.append(0x00) # 'r'
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address.extend(h)
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return base58_ripple.encode_check(bytes(address))
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def decode_address(address: str):
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"""Returns so called Account ID"""
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adr = base58_ripple.decode_check(address)
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return adr[1:]
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