mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-15 02:48:11 +00:00
128 lines
3.9 KiB
Python
128 lines
3.9 KiB
Python
from collections import namedtuple
|
|
from hashlib import sha256
|
|
|
|
from ecdsa import SECP256k1, SigningKey
|
|
|
|
from trezorlib import btc, messages
|
|
|
|
from ...common import compact_size
|
|
|
|
SLIP44 = 1 # Testnet
|
|
|
|
TextMemo = namedtuple("TextMemo", "text")
|
|
RefundMemo = namedtuple("RefundMemo", "address_n")
|
|
CoinPurchaseMemo = namedtuple(
|
|
"CoinPurchaseMemo", "amount, coin_name, slip44, address_n"
|
|
)
|
|
|
|
payment_req_signer = SigningKey.from_string(
|
|
b"?S\ti\x8b\xc5o{,\xab\x03\x194\xea\xa8[_:\xeb\xdf\xce\xef\xe50\xf17D\x98`\xb9dj",
|
|
curve=SECP256k1,
|
|
)
|
|
|
|
|
|
def hash_bytes_prefixed(hasher, data):
|
|
hasher.update(compact_size(len(data)))
|
|
hasher.update(data)
|
|
|
|
|
|
def make_payment_request(
|
|
client, recipient_name, outputs, change_addresses=None, memos=None, nonce=None
|
|
):
|
|
h_pr = sha256(b"SL\x00\x24")
|
|
|
|
if nonce:
|
|
hash_bytes_prefixed(h_pr, nonce)
|
|
else:
|
|
h_pr.update(b"\0")
|
|
|
|
hash_bytes_prefixed(h_pr, recipient_name.encode())
|
|
|
|
if memos is None:
|
|
memos = []
|
|
|
|
h_pr.update(len(memos).to_bytes(1, "little"))
|
|
msg_memos = []
|
|
for memo in memos:
|
|
if isinstance(memo, TextMemo):
|
|
msg_memo = messages.TextMemo(text=memo.text)
|
|
msg_memos.append(messages.PaymentRequestMemo(text_memo=msg_memo))
|
|
memo_type = 1
|
|
h_pr.update(memo_type.to_bytes(4, "little"))
|
|
hash_bytes_prefixed(h_pr, memo.text.encode())
|
|
elif isinstance(memo, RefundMemo):
|
|
address_resp = btc.get_authenticated_address(
|
|
client, "Testnet", memo.address_n
|
|
)
|
|
msg_memo = messages.RefundMemo(
|
|
address=address_resp.address, mac=address_resp.mac
|
|
)
|
|
msg_memos.append(messages.PaymentRequestMemo(refund_memo=msg_memo))
|
|
memo_type = 2
|
|
h_pr.update(memo_type.to_bytes(4, "little"))
|
|
hash_bytes_prefixed(h_pr, address_resp.address.encode())
|
|
elif isinstance(memo, CoinPurchaseMemo):
|
|
address_resp = btc.get_authenticated_address(
|
|
client, memo.coin_name, memo.address_n
|
|
)
|
|
msg_memo = messages.CoinPurchaseMemo(
|
|
coin_type=memo.slip44,
|
|
amount=memo.amount,
|
|
address=address_resp.address,
|
|
mac=address_resp.mac,
|
|
)
|
|
msg_memos.append(messages.PaymentRequestMemo(coin_purchase_memo=msg_memo))
|
|
|
|
memo_type = 3
|
|
h_pr.update(memo_type.to_bytes(4, "little"))
|
|
h_pr.update(memo.slip44.to_bytes(4, "little"))
|
|
hash_bytes_prefixed(h_pr, memo.amount.encode())
|
|
hash_bytes_prefixed(h_pr, address_resp.address.encode())
|
|
else:
|
|
raise ValueError
|
|
|
|
h_pr.update(SLIP44.to_bytes(4, "little"))
|
|
|
|
change_address = iter(change_addresses or [])
|
|
h_outputs = sha256()
|
|
for txo in outputs:
|
|
h_outputs.update(txo.amount.to_bytes(8, "little"))
|
|
address = txo.address or next(change_address)
|
|
h_outputs.update(len(address).to_bytes(1, "little"))
|
|
h_outputs.update(address.encode())
|
|
|
|
h_pr.update(h_outputs.digest())
|
|
|
|
return messages.TxAckPaymentRequest(
|
|
recipient_name=recipient_name,
|
|
amount=sum(txo.amount for txo in outputs if txo.address),
|
|
memos=msg_memos,
|
|
nonce=nonce,
|
|
signature=payment_req_signer.sign_digest_deterministic(h_pr.digest()),
|
|
)
|
|
|
|
|
|
def make_coinjoin_request(
|
|
coordinator_name,
|
|
inputs,
|
|
input_script_pubkeys,
|
|
outputs,
|
|
output_script_pubkeys,
|
|
no_fee_indices,
|
|
fee_rate=500_000, # 0.5 %
|
|
no_fee_threshold=1_000_000,
|
|
min_registrable_amount=5_000,
|
|
):
|
|
# Process inputs.
|
|
for i, txi in enumerate(inputs):
|
|
# Set no_fee flag in coinjoin_flags.
|
|
txi.coinjoin_flags |= (i in no_fee_indices) << 1
|
|
|
|
return messages.CoinJoinRequest(
|
|
fee_rate=fee_rate,
|
|
no_fee_threshold=no_fee_threshold,
|
|
min_registrable_amount=min_registrable_amount,
|
|
mask_public_key=b"",
|
|
signature=b"",
|
|
)
|