Crypto Flexs
  • DIRECTORY
  • CRYPTO
    • ETHEREUM
    • BITCOIN
    • ALTCOIN
  • BLOCKCHAIN
  • EXCHANGE
  • ADOPTION
  • TRADING
  • HACKING
  • SLOT
  • TRADE
Crypto Flexs
  • DIRECTORY
  • CRYPTO
    • ETHEREUM
    • BITCOIN
    • ALTCOIN
  • BLOCKCHAIN
  • EXCHANGE
  • ADOPTION
  • TRADING
  • HACKING
  • SLOT
  • TRADE
Crypto Flexs
Home»BITCOIN NEWS»Mining Theory – How to make a coinbase? How to use witnesses?
BITCOIN NEWS

Mining Theory – How to make a coinbase? How to use witnesses?

By Crypto FlexsDecember 13, 20232 Mins Read
Facebook Twitter Pinterest LinkedIn Tumblr Email
Mining Theory – How to make a coinbase?  How to use witnesses?
Share
Facebook Twitter LinkedIn Pinterest Email

BIP141 added a new rule called “witness appointments.” “Promises are written to the scriptPubKey of the Coinbase transaction,” the document states. I didn’t quite understand what it meant, so I directly placed ‘default_witness_commitment’ provided in the block template when creating Coinbase in the scriptPubKey location. Here is my code:

def makeCoinbase()->None:
    global coinbase,tmpl
    version=pack('<L',1)
    inputCount=unhexlify('01')
    txHash=unhexlify('0000000000000000000000000000000000000000000000000000000000000000')
    preSequence=unhexlify('ffffffff')
    eh=encodeHeight(tmpl('height'))  #Don't worry about this function, it handles height
    msg=eh+b'my message'
    msgSize=pack('B',len(msg))
    sequence=unhexlify('ffffffff')
    outCount=unhexlify('01')
    amount=pack('<Q',tmpl('coinbasevalue'))
    script=unhexlify(tmpl('default_witness_commitment'))
    scriptSize=pack('B',len(script))
    lockTime=unhexlify('00000000')
    coinbase=version+inputCount+txHash+preSequence+msgSize+msg+\
        sequence+outCount+amount+scriptSize+script+lockTime
    tmpl('transactions').insert(0,
        'data':coinbase.hex(),
        'txid':dblsha(coinbase)(::-1).hex()
    )

The tmpl variable is the template obtained using the “getblocktemplate” command. I am testing my code in regtest. When you submit a block, Bitcoin Core creates a new block. And my balance increased. However, when I checked Coinbase for the newly created block, the results were as follows.


    'txid': '9cb794f3292d1ece3af6c1d3055cf6fb26cf2126ff48b39b229bfec5ec651ec4', 
    'hash': 'de081b2a9552ac559d3501ed0669f675530fe9890e27d263c1aff65e678ddc4e', 
    'version': 1, 
    'size': 153, 
    'vsize': 126, 
    'weight': 504, 
    'locktime': 0, 
    'vin': (
        'coinbase': '016c54686520477265617420476f642050616e', 
        'txinwitness': ('0000000000000000000000000000000000000000000000000000000000000000'), 
        'sequence': 4294967295), 
    'vout': (
        'value': Decimal('50.00063100'), 
        'n': 0, 
        'scriptPubKey': 
            'asm': 'OP_RETURN aa21a9edb14717ddf39dacad0babfff4d8d951c076e95d11d2b1f328632c32f98c015d2c', 
            'desc': 'raw(6a24aa21a9edb14717ddf39dacad0babfff4d8d951c076e95d11d2b1f328632c32f98c015d2c)#psf60z3m', 
            'hex': '6a24aa21a9edb14717ddf39dacad0babfff4d8d951c076e95d11d2b1f328632c32f98c015d2c', 
            'type': 'nulldata'
        
    ), 
    'hex': '010000000001010000000000000000000000000000000000000000000000000000000000000000ffffffff13016c54686520477265617420476f642050616effffffff017ce8062a01000000266a24aa21a9edb14717ddf39dacad0babfff4d8d951c076e95d11d2b1f328632c32f98c015d2c0120000000000000000000000000000000000000000000000000000000000000000000000000'

As you can see, it only contains one vout. And that vout doesn’t contain any address. But if you look at Coinbase for a block on the main network, it always contains more than one vout, and the vout contains an address. My question is, am I building Coinbase the right way? If not, how do I fix it? Bitcoin Core did not report any errors, but I always suspected that I had lost the miner’s address.

Share. Facebook Twitter Pinterest LinkedIn Tumblr Email

Related Posts

The strategy has hit the highest market cap since the Rally Bitcoin rally.

July 17, 2025

21.72% of encryption in the second quarter of 2025

July 11, 2025

As Nano Labs begins to accumulate $ 1 billion, BNB gets a big supporter.

July 5, 2025
Add A Comment

Comments are closed.

Recent Posts

MultiBank Group To List $MBG Token On Gate.io And MEXC During Official Token Generation Event

July 18, 2025

Earn $4,777 Daily! PaxMining Leads 2025’s Record-Breaking Bitcoin Mining Boom

July 18, 2025

GSR Leads $100M Private Placement Into Nasdaq-listed MEI Pharma To Launch First Institutional Litecoin Treasury Strategy Alongside Charlie Lee

July 18, 2025

KuCoin Launches XStocks, Delivering A One-Stop Access Point To Top Global Tokenized Equities

July 18, 2025

💵 FREE $18 USDT – Just For Signing Up!

July 18, 2025

How Does AIXA Mining Break Traditional Barriers?

July 18, 2025

How Does AIXA Mining Break Traditional Barriers?

July 18, 2025

The future of EF ecosystem development

July 18, 2025

Satoshi-Aera Bitcoin Whale moves another 40K BTC to Galaxy Digital.

July 18, 2025

Behind The Surge In XRP, DLMining Brings New Opportunities To Mine BTC With Your XRP

July 18, 2025

The strategy has hit the highest market cap since the Rally Bitcoin rally.

July 17, 2025

Crypto Flexs is a Professional Cryptocurrency News Platform. Here we will provide you only interesting content, which you will like very much. We’re dedicated to providing you the best of Cryptocurrency. We hope you enjoy our Cryptocurrency News as much as we enjoy offering them to you.

Contact Us : Partner(@)Cryptoflexs.com

Top Insights

MultiBank Group To List $MBG Token On Gate.io And MEXC During Official Token Generation Event

July 18, 2025

Earn $4,777 Daily! PaxMining Leads 2025’s Record-Breaking Bitcoin Mining Boom

July 18, 2025

GSR Leads $100M Private Placement Into Nasdaq-listed MEI Pharma To Launch First Institutional Litecoin Treasury Strategy Alongside Charlie Lee

July 18, 2025
Most Popular

Bitcoin price prepares for ‘bigger move’ following on-chain indicator ‘reset’

May 23, 2024

NVIDIA Modulus transforms CFD simulations with machine learning.

October 14, 2024

Bitcoin Dominates the Market; Polygon, Avalanche, DigiHorse Offer Huge ROI Potential

August 5, 2024
  • Home
  • About Us
  • Contact Us
  • Disclaimer
  • Privacy Policy
  • Terms and Conditions
© 2025 Crypto Flexs

Type above and press Enter to search. Press Esc to cancel.