Topic: [Quiz] Answer the Bitcoin question and earn merits! #5 - page 2. (Read 642 times)

`OP_DUP OP_ADD OP_8 OP_ADD OP_SHA256 OP_PUSHDATA OP_EQUAL`

'OP_DATA_32 OP_EQUAL'

'OP_PUSHDATA OP_EQUAL`

OP_2
OP_SWAP
OP_DUP
OP_ADD
OP_8
OP_ADD
OP_SHA256
<0xdf3984c3d89ec61f93f2d3060263bbb960a885ffa5d41ca1eb9c2692de71d8b7>
OP_EQUAL

<0xdf3984c3d89ec61f93f2d3060263bbb960a885ffa5d41ca1eb9c2692de71d8b7>
OP_SWAP
OP_DUP
OP_8
OP_ADD
OP_SHA256
OP_EQUAL

OP_DUP
OP_2
OP_MUL
OP_8
OP_ADD
OP_SHA256
<0xdf3984c3d89ec61f93f2d3060263bbb960a885ffa5d41ca1eb9c2692de71d8b7>
OP_EQUAL

`OP_DATA_32 OP_SWAP OP_DUP OP_2 OP_MUL OP_8 OP_ADD OP_SHA256 OP_EQUAL`

OP_2 OP_MUL OP_8 OP_ADD OP_SHA256 OP_DATA_32 OP_EQUAL

OP_DUP OP_2 OP_MUL OP_8 OP_ADD OP_SHA256 OP_DATA_32 OP_EQUAL

OP_DUP
OP_2DUP
OP_ADD
OP_8
OP_ADD
OP_SHA256
OP_SWAP
OP_EQUALVERIFY
OP_CHECKSIG
`

`OP_DATA_32 OP_SWAP OP_DUP OP_2 OP_MUL OP_8 OP_ADD OP_SHA256 OP_EQUALVERIFY OP_CHECKSIG`

OP_DUP OP_HASH160 OP_EQUALVERIFY OP_CHECKSIG

const bitcoin = require('bitcoinjs-lib');

// Defines the hash value Alice wants to match

const targetHash = Buffer.from('df3984c3d89ec61f93f2d3060263bbb960a885ffa5d41ca1eb9c2692de71d8b7', 'hex');

// Creates the locking script
const script = bitcoin.script.compile([
  bitcoin.opcodes.OP_DUP,
  bitcoin.opcodes.OP_2,
  bitcoin.opcodes.OP_MUL,
  bitcoin.opcodes.OP_8,
  bitcoin.opcodes.OP_ADD,
  bitcoin.opcodes.OP_SHA256,
  targetHash,
  bitcoin.opcodes.OP_EQUAL
]);

// Creates a P2SH address from the script
const { address } = bitcoin.payments.p2sh({
  redeem: { output: script, network: bitcoin.networks.testnet },
  network: bitcoin.networks.testnet
});

console.log('P2SH Address:', address);

// Create a new transaction
const psbt = new bitcoin.Psbt({ network: bitcoin.networks.testnet });

// Add input (replace with actual transaction details)
//must be 32 bit
psbt.addInput({
  hash: 'your-transaction-hash', // Replace with actual transaction hash
  index: 0, // Replace with actual index
  nonWitnessUtxo: Buffer.from('your-raw-transaction-hex', 'hex') // Replace with actual raw transaction hex
});

// Add output to the P2SH address
psbt.addOutput({
  address: address,
  value: 1000 // Value in satoshis
});

// Sign the transaction (replace with actual keyPair)
const keyPair = bitcoin.ECPair.makeRandom({ network: bitcoin.networks.testnet });
psbt.signInput(0, keyPair);

// Finalize and build the transaction
psbt.finalizeAllInputs();
const tx = psbt.extractTransaction();
console.log('Transaction Hex:', tx.toHex());

import hashlib

def find_x():
    target_hash = "df3984c3d89ec61f93f2d3060263bbb960a885ffa5d41ca1eb9c2692de71d8b7"
    for x in range(2**32):
        result = 2*x + 8
        hash_result = hashlib.sha256(str(result).encode()).hexdigest()
        if hash_result == target_hash:
            print(f"x = {x}")
            break

find_x()

import hashlib

def find_x():
    target_hash = "0xdf3984c3d89ec61f93f2d3060263bbb960a885ffa5d41ca1eb9c2692de71d8b7"
    for x in range(2**32):
        if x % 100000 == 0:  # Print progress
            print(f"Trying x = {x}")
        result = 2*x + 8
        hash_result = hashlib.sha256(str(result).encode()).hexdigest()
        if hash_result == target_hash:
            print(f"x = {x}")
            break

find_x()