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do_send

2018-08-03 17:51:30   0  举报

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Qtum在热钱包上签名流程

Transaction

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大纲/内容

read_send_tab

make_unsigned_transaction

checkoutput,checkinput

add_input_info

change address

fee_estimator

i_max

i_max is None

coinbase:make_tx

self.p = PRNG()

tx = Transaction.from_io

bucketize_coins(coins)

keys = self.keys(coins)

buckets = defaultdict (list)

list(map(make_Bucket,buckets.keys(),buckets.values())

choose bucket

old first spent

strip_unneeded

tx.add_input

change_outputs

change_amounts

output_amount

确定找零地址的个数

计算找零,找零大于1时候随机化

change

tx.中添加输入和找零

i_max is not None

直接由make_io获得tx

tx.qtum_sort()

查验输出数量,交易佣金是否 过少,交易是否需要密码

sign_tx_with_password

tx_extend_keypairs

Transaction.sign

get_sorted_pubkeys

从Txin中获取公钥

从公钥获取私钥,以及该私钥是否压缩的信息

sign_txin

prehash = Hash(bfh(self.serialize_preimage(txin_index)))

serialize_preimage

get_preimage_script()

if txin[type] == "p2pkh"

bitcoin.address_to_script(txin['address'])

segwit? yes 另行处理

b58_address_to_hash160(addr)

addrtype:P2PKH?yes/no

script = "76a9"

script = push_script(bh2u(hash_160))

script += "88ac"

addrtype:P2SH?yes/no

script = 'a9'

script += push_script(bh2u(hash_160))

script += '87'

if txin[type]  in ["p2sh","p2wsh","p2wsh-p2sh"

multisig_script

op_m = format(opcodes.OP_1 + m - 1, 'x')

op_n = format(opcodes.OP_1 + n - 1, 'x')

keylist = [op_push(len(k)//2) + k for k in public_keys]

return op_m + ''.join(keylist) + op_n + 'ae'

if txin['type'] in ['p2wpkh', 'p2wpkh-p2sh']:

 pubkey = pubkeys[0]

pkh = bh2u(bitcoin.hash_160(bfh(pubkey)))

return '76a9' + push_script(pkh) + '88ac'

if txin['type'] in ['p2wpkh', 'p2wpkh-p2sh']

pubkey = pubkeys[0]

return bitcoin.public_key_to_p2pk_script(pubkey)

serialize_input

serialize_outpoint

s: 序列化outpoint+len(script)+script+int_to_hex(txin[sequence])

serialize_output

s = 8字节长的16进制的数量

script=pay_script

if output_type == TYPE_ADDRESS:             return bitcoin.address_to_script(addr)

先执行隔离见证,if True,直接返回

b58_address_to_hash160(addr)

addr = to_bytes(addr,"ascii")

_bytes = base_decode(addr,25,base=58)

return _bytes[0],_bytes[1:21]

根据上步操作返回的addrtype为script中首先写入不同的操作码

script+=push_script(bh2u(hash_160))

再次根据不同的addrtype写入不同的操作码

if output_type == TYPE_PUBKEY or output_type == 'coinstake':             return bitcoin.public_key_to_p2pk_script(addr)

script = push_script(pubkey)

op_push(data_len)

script+= "ac"

s+=var_int(len(script)//2)

s += script

privkey.sign_transaction(prehash)

sign(locate:ecc.py)

sig = bh2u(sig)+"01"

wallet.sign_transaction

keystore.can_sign

keystore.get_tx_derivation

parse_xpubkey

keystore.sign_transaction

get_tx_derivation

get_private_key

tx.sign(keypairs)

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