• About
  • FAQ
  • Earn Bitcoin while Surfing the net
  • Buy & Sell Crypto on Paxful
Newsletter
Approx Foundation
  • Home
    • Home – Layout 1
  • Bitcoin
  • Ethereum
  • Regulation
  • Market
  • Blockchain
  • Business
  • Guide
  • Contact Us
No Result
View All Result
  • Home
    • Home – Layout 1
  • Bitcoin
  • Ethereum
  • Regulation
  • Market
  • Blockchain
  • Business
  • Guide
  • Contact Us
No Result
View All Result
Approx Foundation
No Result
View All Result
Home Bitcoin

spending – learn me how to spend nonstandard script. mainnet. 25k sats

Moussa by Moussa
January 11, 2024
in Bitcoin
0
peer discovery – how to obtain the IP addresses of nodes for mining pools?
189
SHARES
1.5k
VIEWS
Share on FacebookShare on Twitter


I used chatgpt to construct this code in python. i learned very hard, but i just can’t understand how to spend with no errors.
all necessary data for creating raw transaction is provided below.
i was trying to spend first op_if condition.
posting my code here. if some one could do it (spend it) means i should learn more and harder.
Final transaction in hexadecimal form: 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

import hashlib
import ecdsa

def dSHA256(raw):
    return hashlib.sha256(hashlib.sha256(raw).digest()).digest()

def create_signature(private_key_hex, message):
    try:
        private_key_bytes = bytes.fromhex(private_key_hex)
        signing_key = ecdsa.SigningKey.from_string(private_key_bytes, curve=ecdsa.SECP256k1)
        signature = signing_key.sign_digest(message, sigencode=ecdsa.util.sigencode_der_canonize)
        return signature  # Do not append SIGHASH_ALL here
    except Exception as e:
        print(f"Error creating signature: {e}")
        return None

# Transaction version
version = (2).to_bytes(4, byteorder="little", signed=False)

# Input transaction (Outpoint)
txid = (bytes.fromhex("a1b1b291b076d90232a32638ad74f00ffd65cc355ca7e77b833ea0728ea07aab"))[::-1]
index = (164).to_bytes(4, byteorder="little", signed=False)
outpoint = txid + index

# Hashed outpoint
hashPrevOut = dSHA256(outpoint)

# Sequence
sequence = (0xfffffffe).to_bytes(4, byteorder="little", signed=False)  # Use a value less than 0xffffffff
hashSequence = dSHA256(sequence)

# Amount being spent
amount = (int(0.00025297 * 100000000)).to_bytes(8, byteorder="little", signed=True)

# Output to the specified address
value = (int(0.00005297 * 100000000)).to_bytes(8, byteorder="little", signed=True)
scriptPubKey_hex = "00206cadc53e5157ac4f0c8e98d0011fd8ccd14378b846b1b944478b3437324b992e"
scriptPubKey = bytes.fromhex(scriptPubKey_hex)
output = value + (len(scriptPubKey)).to_bytes(1, byteorder="little", signed=False) + scriptPubKey

# Hashed output
hashOutput = dSHA256(output)

# nLockTime
nLockTime = (820000).to_bytes(4, byteorder="little", signed=False)

# Sighash type
sighash = bytes.fromhex("01000000")

# Public and private keys
private_key_hex = "2BF933A3FC415D4BA19D07F3F5FF641E645D1BDF70CFE1674D54C0E66AAA681F"
verifying_key = ecdsa.SigningKey.from_string(bytes.fromhex(private_key_hex), curve=ecdsa.SECP256k1).get_verifying_key()
x_cor = bytes.fromhex(verifying_key.to_string().hex())[:32]
y_cor = bytes.fromhex(verifying_key.to_string().hex())[32:]
public_key = bytes.fromhex("02" + x_cor.hex()) if int.from_bytes(y_cor, byteorder="big", signed=True) % 2 == 0 else bytes.fromhex("03" + x_cor.hex())

# WitnessScript
witnessScript = bytes.fromhex("630320830cb17521024e24d2aff4e1c51eaf122e0e5a6dfe218f7b3b883d1eb537ce9a7e040b329ca5ac6703b0830cb17521030618b7d1a6747cb13bba78611646a8d08c3683e14a0d2a4483c877561e1416efac68")
scriptCode = witnessScript

# Transaction digest for signature
bip_143 = version + hashPrevOut + hashSequence + outpoint + scriptCode + amount + sequence + hashOutput + nLockTime + sighash
hashed_bip_143 = dSHA256(bip_143)

# Signature
signature = create_signature(private_key_hex, hashed_bip_143)

# Print the DER-encoded signature in hexadecimal form
print("Signature (DER-encoded) in hexadecimal form:", signature.hex())

# Append SIGHASH_ALL to the signature
signature += bytes.fromhex("01")

# Witness construction for the first branch of OP_IF
minimal_true = bytes.fromhex("01")  # Minimal push of true
witness = (
    bytes.fromhex("04")  # Number of elements in the witness
    + (len(signature)).to_bytes(1, byteorder="little", signed=False) + signature
    + (len(public_key)).to_bytes(1, byteorder="little", signed=False) + public_key
    + (len(minimal_true)).to_bytes(1, byteorder="little", signed=False) + minimal_true
    + (len(witnessScript)).to_bytes(1, byteorder="little", signed=False) + witnessScript
)

# Transaction input and output counts
tx_in_count = (1).to_bytes(1, byteorder="little", signed=False)
tx_out_count = (1).to_bytes(1, byteorder="little", signed=False)

# Marker and Flag for SegWit
marker = bytes.fromhex("00")
flag = bytes.fromhex("01")

# Final transaction assembly
final_tx = (
    version
    + marker
    + flag
    + tx_in_count
    + outpoint
    + (0).to_bytes(1, byteorder="little", signed=False)  # ScriptSig is empty for SegWit inputs
    + sequence
    + tx_out_count
    + output
    + witness
    + nLockTime
)

# Print the final transaction hex
print("Final transaction in hexadecimal form:", final_tx.hex())



Source link

Related articles

Did any 2009 Bitcoin service generate multi-word passphrases?

October 6, 2026
Spain’s Housing Pressure Puts Sánchez’s Election Strategy to the Test

Spain’s Housing Pressure Puts Sánchez’s Election Strategy to the Test

October 6, 2026
Share76Tweet47

Related Posts

Did any 2009 Bitcoin service generate multi-word passphrases?

by Moussa
October 6, 2026
0

I am trying to identify a Bitcoin-related service or wallet that I remember using around 2009. I understand that modern...

Spain’s Housing Pressure Puts Sánchez’s Election Strategy to the Test

Spain’s Housing Pressure Puts Sánchez’s Election Strategy to the Test

by Moussa
October 6, 2026
0

Spanish election Polymarket odds are live after Pedro Sánchez called Spain’s next general election early, in a snap contest for...

Binance bStocks Will Reinvest Oracle And Marvell Dividends Onchain

Binance bStocks Will Reinvest Oracle And Marvell Dividends Onchain

by Moussa
October 6, 2026
0

Trusted Editorial content, reviewed by leading industry experts and seasoned editors. Ad Disclosure TL;DR Binance will support cash dividends for...

Fairshake Backs 32 House Candidates As Crypto Election Spending Ramps Up

Fairshake Backs 32 House Candidates As Crypto Election Spending Ramps Up

by Moussa
October 6, 2026
0

TL;DR Fairshake has named 32 U.S. House candidates it plans to support ahead of the November midterms. Six races are...

Buy Coffee And Bacon Across 200 Indiana Bitcoin Merchants

Buy Coffee And Bacon Across 200 Indiana Bitcoin Merchants

by Moussa
October 6, 2026
0

My trip into the Indiana Bitcoin market started at Kaffeine Coffee Co. on Fulton Street. The coffee was tasty, but...

Load More

youssufi.com

sephina.com

[vc_row full_width="stretch_row" parallax="content-moving" vc_row_background="" background_repeat="no-repeat" background_position="center center" footer_scheme="dark" css=".vc_custom_1517813231908{padding-top: 60px !important;padding-bottom: 30px !important;background-color: #191818 !important;background-position: center;background-repeat: no-repeat !important;background-size: cover !important;}" footer_widget_title_color="#fcbf46" footer_button_bg="#fcb11e"][vc_column width="1/4"]

We bring you the latest in Crypto News

[/vc_column][vc_column width="1/4"][vc_wp_categories]
[/vc_column][vc_column width="1/4"][vc_wp_tagcloud taxonomy="post_tag"][/vc_column][vc_column width="1/4"]

Newsletter

[vc_raw_html]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[/vc_raw_html][/vc_column][/vc_row]
No Result
View All Result
  • Contact Us
  • Homepages
  • Business
  • Guide

© 2024 APPROX FOUNDATION - The Crypto Currency News