mirror of
https://github.com/trezor/trezor-firmware.git
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349 lines
10 KiB
Python
349 lines
10 KiB
Python
# This file is part of the Trezor project.
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#
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# Copyright (C) 2012-2019 SatoshiLabs and contributors
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#
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# This library is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License version 3
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# as published by the Free Software Foundation.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the License along with this library.
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# If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.
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from datetime import datetime
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from . import messages
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from .tools import CallException, b58decode, expect, session
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def name_to_number(name):
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length = len(name)
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value = 0
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for i in range(0, 13):
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c = 0
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if i < length and i < 13:
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c = char_to_symbol(name[i])
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if i < 12:
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c &= 0x1F
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c <<= 64 - 5 * (i + 1)
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else:
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c &= 0x0F
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value |= c
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return value
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def char_to_symbol(c):
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if c >= "a" and c <= "z":
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return ord(c) - ord("a") + 6
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elif c >= "1" and c <= "5":
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return ord(c) - ord("1") + 1
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else:
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return 0
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def parse_asset(asset):
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amount_str, symbol_str = asset.split(" ")
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# "-1.0000" => ["-1", "0000"] => -10000
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amount_parts = amount_str.split(".", maxsplit=1)
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amount = int("".join(amount_parts))
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precision = 0
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if len(amount_parts) > 1:
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precision = len(amount_parts[1])
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# 4, "EOS" => b"\x04EOS" => little-endian uint32
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symbol_bytes = bytes([precision]) + symbol_str.encode()
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symbol = int.from_bytes(symbol_bytes, "little")
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return messages.EosAsset(amount=amount, symbol=symbol)
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def public_key_to_buffer(pub_key):
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_t = 0
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if pub_key[:3] == "EOS":
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pub_key = pub_key[3:]
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_t = 0
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elif pub_key[:7] == "PUB_K1_":
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pub_key = pub_key[7:]
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_t = 0
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elif pub_key[:7] == "PUB_R1_":
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pub_key = pub_key[7:]
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_t = 1
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return _t, b58decode(pub_key, None)[:-4]
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def parse_common(action):
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authorization = []
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for auth in action["authorization"]:
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authorization.append(
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messages.EosPermissionLevel(
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actor=name_to_number(auth["actor"]),
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permission=name_to_number(auth["permission"]),
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)
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)
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return messages.EosActionCommon(
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account=name_to_number(action["account"]),
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name=name_to_number(action["name"]),
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authorization=authorization,
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)
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def parse_transfer(data):
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return messages.EosActionTransfer(
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sender=name_to_number(data["from"]),
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receiver=name_to_number(data["to"]),
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memo=data["memo"],
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quantity=parse_asset(data["quantity"]),
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)
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def parse_vote_producer(data):
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producers = []
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for producer in data["producers"]:
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producers.append(name_to_number(producer))
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return messages.EosActionVoteProducer(
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voter=name_to_number(data["account"]),
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proxy=name_to_number(data["proxy"]),
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producers=producers,
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)
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def parse_buy_ram(data):
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return messages.EosActionBuyRam(
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payer=name_to_number(data["payer"]),
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receiver=name_to_number(data["receiver"]),
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quantity=parse_asset(data["quant"]),
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)
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def parse_buy_rambytes(data):
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return messages.EosActionBuyRamBytes(
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payer=name_to_number(data["payer"]),
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receiver=name_to_number(data["receiver"]),
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bytes=int(data["bytes"]),
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)
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def parse_sell_ram(data):
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return messages.EosActionSellRam(
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account=name_to_number(data["account"]), bytes=int(data["bytes"])
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)
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def parse_delegate(data):
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return messages.EosActionDelegate(
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sender=name_to_number(data["sender"]),
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receiver=name_to_number(data["receiver"]),
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net_quantity=parse_asset(data["stake_net_quantity"]),
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cpu_quantity=parse_asset(data["stake_cpu_quantity"]),
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transfer=bool(data["transfer"]),
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)
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def parse_undelegate(data):
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return messages.EosActionUndelegate(
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sender=name_to_number(data["sender"]),
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receiver=name_to_number(data["receiver"]),
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net_quantity=parse_asset(data["unstake_net_quantity"]),
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cpu_quantity=parse_asset(data["unstake_cpu_quantity"]),
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)
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def parse_refund(data):
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return messages.EosActionRefund(owner=name_to_number(data["owner"]))
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def parse_updateauth(data):
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auth = parse_authorization(data["auth"])
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return messages.EosActionUpdateAuth(
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account=name_to_number(data["account"]),
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permission=name_to_number(data["permission"]),
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parent=name_to_number(data["parent"]),
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auth=auth,
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)
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def parse_deleteauth(data):
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return messages.EosActionDeleteAuth(
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account=name_to_number(data["account"]),
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permission=name_to_number(data["permission"]),
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)
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def parse_linkauth(data):
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return messages.EosActionLinkAuth(
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account=name_to_number(data["account"]),
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code=name_to_number(data["code"]),
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type=name_to_number(data["type"]),
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requirement=name_to_number(data["requirement"]),
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)
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def parse_unlinkauth(data):
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return messages.EosActionUnlinkAuth(
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account=name_to_number(data["account"]),
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code=name_to_number(data["code"]),
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type=name_to_number(data["type"]),
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)
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def parse_authorization(data):
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keys = []
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for key in data["keys"]:
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_t, _k = public_key_to_buffer(key["key"])
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keys.append(
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messages.EosAuthorizationKey(type=_t, key=_k, weight=int(key["weight"]))
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)
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accounts = []
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for account in data["accounts"]:
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accounts.append(
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messages.EosAuthorizationAccount(
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account=messages.EosPermissionLevel(
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actor=name_to_number(account["permission"]["actor"]),
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permission=name_to_number(account["permission"]["permission"]),
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),
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weight=int(account["weight"]),
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)
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)
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waits = []
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for wait in data["waits"]:
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waits.append(
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messages.EosAuthorizationWait(
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wait_sec=int(wait["wait_sec"]), weight=int(wait["weight"])
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)
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)
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return messages.EosAuthorization(
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threshold=int(data["threshold"]), keys=keys, accounts=accounts, waits=waits
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)
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def parse_new_account(data):
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owner = parse_authorization(data["owner"])
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active = parse_authorization(data["active"])
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return messages.EosActionNewAccount(
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creator=name_to_number(data["creator"]),
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name=name_to_number(data["name"]),
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owner=owner,
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active=active,
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)
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def parse_unknown(data):
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data_bytes = bytes.fromhex(data)
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return messages.EosActionUnknown(data_size=len(data_bytes), data_chunk=data_bytes)
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def parse_action(action):
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tx_action = messages.EosTxActionAck()
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data = action["data"]
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tx_action.common = parse_common(action)
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if action["account"] == "eosio":
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if action["name"] == "voteproducer":
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tx_action.vote_producer = parse_vote_producer(data)
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elif action["name"] == "buyram":
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tx_action.buy_ram = parse_buy_ram(data)
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elif action["name"] == "buyrambytes":
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tx_action.buy_ram_bytes = parse_buy_rambytes(data)
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elif action["name"] == "sellram":
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tx_action.sell_ram = parse_sell_ram(data)
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elif action["name"] == "delegatebw":
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tx_action.delegate = parse_delegate(data)
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elif action["name"] == "undelegatebw":
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tx_action.undelegate = parse_undelegate(data)
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elif action["name"] == "refund":
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tx_action.refund = parse_refund(data)
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elif action["name"] == "updateauth":
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tx_action.update_auth = parse_updateauth(data)
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elif action["name"] == "deleteauth":
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tx_action.delete_auth = parse_deleteauth(data)
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elif action["name"] == "linkauth":
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tx_action.link_auth = parse_linkauth(data)
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elif action["name"] == "unlinkauth":
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tx_action.unlink_auth = parse_unlinkauth(data)
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elif action["name"] == "newaccount":
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tx_action.new_account = parse_new_account(data)
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elif action["name"] == "transfer":
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tx_action.transfer = parse_transfer(data)
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else:
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tx_action.unknown = parse_unknown(data)
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return tx_action
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def parse_transaction_json(transaction):
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header = messages.EosTxHeader()
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header.expiration = int(
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(
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datetime.strptime(transaction["expiration"], "%Y-%m-%dT%H:%M:%S")
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- datetime(1970, 1, 1)
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).total_seconds()
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)
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header.ref_block_num = int(transaction["ref_block_num"])
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header.ref_block_prefix = int(transaction["ref_block_prefix"])
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header.max_net_usage_words = int(transaction["max_net_usage_words"])
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header.max_cpu_usage_ms = int(transaction["max_cpu_usage_ms"])
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header.delay_sec = int(transaction["delay_sec"])
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actions = [parse_action(a) for a in transaction["actions"]]
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return header, actions
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# ====== Client functions ====== #
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@expect(messages.EosPublicKey)
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def get_public_key(client, n, show_display=False, multisig=None):
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response = client.call(
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messages.EosGetPublicKey(address_n=n, show_display=show_display)
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)
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return response
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@session
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def sign_tx(client, address, transaction, chain_id):
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header, actions = parse_transaction_json(transaction)
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msg = messages.EosSignTx()
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msg.address_n = address
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msg.chain_id = bytes.fromhex(chain_id)
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msg.header = header
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msg.num_actions = len(actions)
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response = client.call(msg)
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try:
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while isinstance(response, messages.EosTxActionRequest):
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response = client.call(actions.pop(0))
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except IndexError:
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# pop from empty list
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raise CallException(
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"Eos.UnexpectedEndOfOperations",
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"Reached end of operations without a signature.",
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) from None
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if not isinstance(response, messages.EosSignedTx):
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raise CallException(messages.FailureType.UnexpectedMessage, response)
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return response
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