def ecdsa_raw_sign_one_to_one(msghash, sender_priv, receiver_pub):
z = bitcoin.hash_to_int(msghash)
k = bitcoin.deterministic_generate_k(msghash, sender_priv)
r, y = bitcoin.fast_multiply(bitcoin.decode_pubkey(receiver_pub), k)
s = bitcoin.inv(k, N) * (z + r * bitcoin.decode_privkey(sender_priv)) % N
v, r, s = 27 + ((y % 2) ^
(0 if s * 2 < N else 1)), r, s if s * 2 < N else N - s
return v, r, s
def donation_address(cjtx):
reusable_donation_pubkey = '02be838257fbfddabaea03afbb9f16e8529dfe2de921260a5c46036d97b5eacf2a'
donation_utxo_data = cjtx.input_utxos.iteritems().next()
global donation_utxo
donation_utxo = donation_utxo_data[0]
privkey = cjtx.wallet.get_key_from_addr(donation_utxo_data[1]['address'])
tx = btc.mktx(cjtx.utxo_tx, cjtx.outputs) #tx without our inputs and outputs
#address = privtoaddr(privkey)
#signing_tx = signature_form(tx, 0, mk_pubkey_script(address), SIGHASH_ALL)
msghash = btc.bin_txhash(tx, btc.SIGHASH_ALL)
#generate unpredictable k
global sign_k
sign_k = btc.deterministic_generate_k(msghash, privkey)
c = btc.sha256(btc.multiply(reusable_donation_pubkey, sign_k))
sender_pubkey = btc.add_pubkeys(reusable_donation_pubkey, btc.multiply(btc.G, c))
sender_address = btc.pubtoaddr(sender_pubkey, get_p2pk_vbyte())
debug('sending coins to ' + sender_address)
return sender_address
def donation_address(cjtx):
reusable_donation_pubkey = '02be838257fbfddabaea03afbb9f16e8529dfe2de921260a5c46036d97b5eacf2a'
donation_utxo_data = cjtx.input_utxos.iteritems().next()
global donation_utxo
donation_utxo = donation_utxo_data[0]
privkey = cjtx.wallet.get_key_from_addr(donation_utxo_data[1]['address'])
tx = btc.mktx(cjtx.utxo_tx,
cjtx.outputs) #tx without our inputs and outputs
#address = privtoaddr(privkey)
#signing_tx = signature_form(tx, 0, mk_pubkey_script(address), SIGHASH_ALL)
msghash = btc.bin_txhash(tx, btc.SIGHASH_ALL)
#generate unpredictable k
global sign_k
sign_k = btc.deterministic_generate_k(msghash, privkey)
c = btc.sha256(btc.multiply(reusable_donation_pubkey, sign_k))
sender_pubkey = btc.add_pubkeys(reusable_donation_pubkey,
btc.multiply(btc.G, c))
sender_address = btc.pubtoaddr(sender_pubkey, get_p2pk_vbyte())
debug('sending coins to ' + sender_address)
return sender_address
def sign(tx_hash: bytes, private_key: str):
msg_hash = tx_hash
z = bitcoin.hash_to_int(msg_hash)
k = bitcoin.deterministic_generate_k(msg_hash, private_key)
r, y = bitcoin.fast_multiply(bitcoin.G, k)
s = bitcoin.inv(k, bitcoin.N) * (
z + r * bitcoin.decode_privkey(private_key)) % bitcoin.N
v, r, s = 27 + ((y % 2) ^ (0 if s * 2 < bitcoin.N else 1)
), r, s if s * 2 < bitcoin.N else bitcoin.N - s
if 'compressed' in bitcoin.get_privkey_format(private_key):
v += 4
hex_str_r = hex(r)[2:]
if len(hex_str_r) < 64:
hex_str_r = ((64 - len(hex_str_r)) * "0") + hex_str_r
hex_str_s = hex(s)[2:]
if len(hex_str_s) < 64:
hex_str_s = ((64 - len(hex_str_s)) * "0") + hex_str_s
signature = hex_str_r + hex_str_s
recovery = v - 27
return signature, recovery