• 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

Smarter Web Company Adds 10 Bitcoin, Lifts Holdings To 2,869 BTC Amid Treasury Push

Smarter Web Company Adds 10 Bitcoin, Lifts Holdings To 2,869 BTC Amid Treasury Push

May 26, 2026
Breaking Time Barriers and Reshaping Global Finance

Breaking Time Barriers and Reshaping Global Finance

May 26, 2026
Share76Tweet47

Related Posts

Smarter Web Company Adds 10 Bitcoin, Lifts Holdings To 2,869 BTC Amid Treasury Push

Smarter Web Company Adds 10 Bitcoin, Lifts Holdings To 2,869 BTC Amid Treasury Push

by Moussa
May 26, 2026
0

London-listed The Smarter Web Company (LSE: SWC) disclosed on May 26 that it acquired 10 Bitcoin at an average price...

Breaking Time Barriers and Reshaping Global Finance

Breaking Time Barriers and Reshaping Global Finance

by Moussa
May 26, 2026
0

The evolution of finance is fundamentally a silent revolution focused on breaking barriers and enhancing efficiency. From the ringing bells...

How do Bitcoin mining pools typically handle payout frequency versus thresholds?

Is there any point to casual mining?

by Moussa
May 26, 2026
0

The math here changed dramatically since the 2011 answers. Solo CPU mining of Bitcoin in 2026 produces effectively zero coins...

Why Oil Price and Asia Stocks Matter to Crypto: US-Iran Talks Lift Markets

Why Oil Price and Asia Stocks Matter to Crypto: US-Iran Talks Lift Markets

by Moussa
May 26, 2026
0

WTI crude Oil price dropped more than $4 per barrel after President Donald Trump signalled that US-Iran peace talks were...

2 Years After Being Pushed Out, Binance Has A Plan To Return To The Philippines

2 Years After Being Pushed Out, Binance Has A Plan To Return To The Philippines

by Moussa
May 26, 2026
0

Trusted Editorial content, reviewed by leading industry experts and seasoned editors. Ad Disclosure Binance, the world’s largest cryptocurrency exchange by...

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]JTNDcCUzRSUzQ2RpdiUyMGNsYXNzJTNEJTIydG5wJTIwdG5wLXN1YnNjcmlwdGlvbiUyMiUzRSUwQSUzQ2Zvcm0lMjBtZXRob2QlM0QlMjJwb3N0JTIyJTIwYWN0aW9uJTNEJTIyaHR0cHMlM0ElMkYlMkZhcHByb3gub3JnJTJGJTNGbmElM0RzJTIyJTNFJTBBJTBBJTNDaW5wdXQlMjB0eXBlJTNEJTIyaGlkZGVuJTIyJTIwbmFtZSUzRCUyMm5sYW5nJTIyJTIwdmFsdWUlM0QlMjIlMjIlM0UlM0NkaXYlMjBjbGFzcyUzRCUyMnRucC1maWVsZCUyMHRucC1maWVsZC1maXJzdG5hbWUlMjIlM0UlM0NsYWJlbCUyMGZvciUzRCUyMnRucC0xJTIyJTNFRmlyc3QlMjBuYW1lJTIwb3IlMjBmdWxsJTIwbmFtZSUzQyUyRmxhYmVsJTNFJTBBJTNDaW5wdXQlMjBjbGFzcyUzRCUyMnRucC1uYW1lJTIyJTIwdHlwZSUzRCUyMnRleHQlMjIlMjBuYW1lJTNEJTIybm4lMjIlMjBpZCUzRCUyMnRucC0xJTIyJTIwdmFsdWUlM0QlMjIlMjIlM0UlM0MlMkZkaXYlM0UlMEElM0NkaXYlMjBjbGFzcyUzRCUyMnRucC1maWVsZCUyMHRucC1maWVsZC1lbWFpbCUyMiUzRSUzQ2xhYmVsJTIwZm9yJTNEJTIydG5wLTIlMjIlM0VFbWFpbCUzQyUyRmxhYmVsJTNFJTBBJTNDaW5wdXQlMjBjbGFzcyUzRCUyMnRucC1lbWFpbCUyMiUyMHR5cGUlM0QlMjJlbWFpbCUyMiUyMG5hbWUlM0QlMjJuZSUyMiUyMGlkJTNEJTIydG5wLTIlMjIlMjB2YWx1ZSUzRCUyMiUyMiUyMHJlcXVpcmVkJTNFJTNDJTJGZGl2JTNFJTBBJTNDZGl2JTIwY2xhc3MlM0QlMjJ0bnAtZmllbGQlMjB0bnAtcHJpdmFjeS1maWVsZCUyMiUzRSUzQ2xhYmVsJTNFJTNDaW5wdXQlMjB0eXBlJTNEJTIyY2hlY2tib3glMjIlMjBuYW1lJTNEJTIybnklMjIlMjByZXF1aXJlZCUyMGNsYXNzJTNEJTIydG5wLXByaXZhY3klMjIlM0UlQzIlQTBCeSUyMGNvbnRpbnVpbmclMkMlMjB5b3UlMjBhY2NlcHQlMjB0aGUlMjBwcml2YWN5JTIwcG9saWN5JTNDJTJGbGFiZWwlM0UlM0MlMkZkaXYlM0UlM0NkaXYlMjBjbGFzcyUzRCUyMnRucC1maWVsZCUyMHRucC1maWVsZC1idXR0b24lMjIlM0UlM0NpbnB1dCUyMGNsYXNzJTNEJTIydG5wLXN1Ym1pdCUyMiUyMHR5cGUlM0QlMjJzdWJtaXQlMjIlMjB2YWx1ZSUzRCUyMlN1YnNjcmliZSUyMiUyMCUzRSUwQSUzQyUyRmRpdiUzRSUwQSUzQyUyRmZvcm0lM0UlMEElM0MlMkZkaXYlM0UlM0NiciUyRiUzRSUzQyUyRnAlM0U=[/vc_raw_html][/vc_column][/vc_row]
No Result
View All Result
  • Contact Us
  • Homepages
  • Business
  • Guide

© 2024 APPROX FOUNDATION - The Crypto Currency News