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    Author Topic: [CHALLENGE] Merit Challenge Lokal Board Indonesia | RESMI & RUNNING  (Read 7044 times)
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    • oi95
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    September 22, 2018, 11:52:51 AM
     #121
    * Partisipasi Challenge #6 - Mining Quiz - Periode 3

    * Account : oi95
    * Link Profile : https://bitcointalk.org/index.php?action=profile;u=1368542
    * Sudah mengisi Form submit jawaban : Done

  • sebas7ian
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    September 23, 2018, 06:44:25 AM
    Merited by abhiseshakana (1)
     #122
    * Partisipasi Challenge #6 - Mining Quiz - Periode 3

    * Account : sebas7ian
    * Link Profile : https://bitcointalk.org/index.php?action=profile;u=2307690
    * Sudah mengisi Form submit jawaban : Done

  • Ginz_24
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    September 24, 2018, 02:58:21 AM
    Last edit: September 24, 2018, 03:53:10 AM by Ginz_24
     #123
    Quote from: mu_enrico on September 08, 2018, 06:12:20 AM
    Nama akun: mu_enrico
    Challenge: Bruteforce Sederhana dan Sign Message

    Deskripsi challenge:
    Akan ane berikan enam privkey HEX (minus satu atau dua digit terakhir) dan enam alamat bitcoin (compressed) yang dihasilkan dari privkey tersebut.

    Reward 1 merit, untuk peserta dengan merit <10
    1. Privkey: 1ADCEBAFB9755BDE06607EA21D1531540737B70A04AAC7530278694179BE320X | Address: 1JYnXCYM2ueGcYTbrtqVjBUGQ9rd42wEH3
    2. Privkey: 73B582C6D01C32B76F0917CB747C583D6E5EDE636DC3AE3A6B11002810D75B6X | Address: bc1qgz7xpt8w9d68eyd2d56tcrz5sxcjlxs6lg74wv
    3. Privkey: 08CEF9BDAB6749CC14726CB00F0723461525A51816B8D541106A7B536BAC201X | Address: 14EdJpaB2dZDQZMzuPs16bPU2GcYSYuLym
    4. Privkey: 22E4D397814D63E63E58469A252D096C3F0F8F323C92FF6B3A40517941860A3X | Address: bc1q0wcqv6x49s52v6p955msrpfs4sjr76nwg3v677

    Reward 2 merit, untuk peserta dengan merit <100
    5. Privkey: 72B483C7D11D33B66E0816CA757D593C6F5FDF626CC2AF3B6A10012911D65AXX | Address: 1874A2YjWcVEfQVFvoQuM9RdVCSnHKhHw1
    6. Privkey: 74B285C1D71B35B0680E10CC737B5F3A6959D9646AC4A93D6C16072F17D05CXX | Address: bc1qv3358pldmd2mg5k0sgvfsya9le8rcaxv0fsp3k

    Tugas peserta adalah posting di sini berupa signed message yang berisikan kesan/pesan/kritik/saran/curhat selama agan menjadi anggota forum bitcointalk ini (khususnya SF Indo). Contoh:

    Code:
    Message: Halo, hari ini 08/09/2018 ane mu_enrico (https://bitcointalk.org/index.php?action=profile;u=1574226). Setelah ane join di forum ini, ane mendapatkan ilmu yang sangat bermanfaat mengenai blockchain dan bitcoin. Semoga forum bitcointalk Indonesia semakin bermutu dan memiliki komunitas yang baik dan solid.
    Address: 1JYnXCYM2ueGcYTbrtqVjBUGQ9rd42wEH3
    Signature: IPv7DcbM7uGtGP8LEeM5JLklKd2vc98bbZQb3AoyB+KyN9kVkTKFbnHEb1wysrQTJNSh1YICw73TCr7sWmWKMDQ=

    Code:
    Message: Halo, hari ini 08/09/2018 ane mu_enrico (https://bitcointalk.org/index.php?action=profile;u=1574226). Setelah ane join di forum ini, ane mendapatkan ilmu yang sangat bermanfaat mengenai blockchain dan bitcoin. Semoga forum bitcointalk Indonesia semakin bermutu dan memiliki komunitas yang baik dan solid.
    Address: bc1qv3358pldmd2mg5k0sgvfsya9le8rcaxv0fsp3k
    Signature: H4x39jSNr7i4tQkEvGn+NLUzAkLsFjtvoIhCVbrLjXXTOBDYQ8Wzbt7GDHEmTDRouRdoPKgumsREV/8n54Y+hGs=

    Petunjuk
    - Gunakan dompet electrum untuk sign message yang menggunakan address BECH32 (Native P2WPKH)
    - Teori singkat ada di https://bt.irlbtc.com/view/4459504.0

    Kriteria peserta:
    - Satu akun hanya boleh ikut satu kali.
    - Challenge 1-4 maksimal jr member (merit <10).
    - Challenge 5-6 maksimal member (merit <100).
    - Kualitas post relatif baik, dalam arti tidak melakukan banyak spamming (post one-liner, dst), post OOT dst.
    - No redtrust.
    - Jumlah maksimal peserta 6 orang.

    Batas waktu:
    Sampai keenam alamat bitcoin tersebut "taken".

    Kriteria pemenang:
    - Posting signed message kesan/pesan/kritik/saran/curhat yang valid sesuai format, siapa cepat dia dapat.

    Reward:
    - 1 merit per akun untuk challenge 1-4
    - 2 merit per akun untuk challenge 5-6
    Reward dari ane dan agan @joniboini

    Larangan:
    - Satu akun hanya boleh satu kali posting signed message dari satu privkey. Silahkan gunakan privkey lain apabila sudah ada yang posting signed message dari daftar privkey di atas.
    - Jangan gunakan alamat yang ada pada tantangan ini untuk kirim/terima BTC sungguhan!

    Bonus Challenge:
    Reward 168.791 BTC Grin
    7. Privkey: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX | Address: 16ftSEQ4ctQFDtVZiUBusQUjRrGhM3JYwe

    Maaf gan saya ingin bertanya sedikit tentang minus satu atau dua digit angka terakhir, apakah itu kita isi hanya dengan bilangan heksadesimal atau bisa selain bilangan heksadesimal?

    Jika hanya menggunakan bilangan heksadesimal, maka kemungkinan address yang di hasilkan dari percobaan angka heksadesimal yang di masukan kedalam angka yang hilang adalah 16 address untuk satu digit angka yang hilang (0-F = 16)

    Saya telah melakukan total 32 percobaan dari 2 privatkey(No.2&4) dan menghasilkan 32 address yang belum di kompres.
    setelah saya kompres menggunakan https://walletgenerator.net, hasilnya tidak ada privatkey dan address yang cocok seperti yang agan berikan di no.2&4

    Dibawah ini privatkey yang di hasilkan dari 32 percobaan tersebut:

    #2. Privkey: 73B582C6D01C32B76F0917CB747C583D6E5EDE636DC3AE3A6B11002810D75B6(X=0-F)
    (privatkey format base58, address compressed)
    DELETED

    #4. Privkey: 22E4D397814D63E63E58469A252D096C3F0F8F323C92FF6B3A40517941860A3(X=0-F)
    (privatkey format base58, address compressed)
    DELETED

    Percobaan ini saya lakukan berdasarkan dengan thread edukasi agan di https://bt.irlbtc.com/view/4459504.0
    saya belum membuat sign message karna tidak ada kombinasi privatkey dan address yang cocok di challenge no.2&4
    Mohon maaf jika ada kesalahan dan mohon bimbingannya, terimakasih  Smiley

  • mu_enrico
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    September 24, 2018, 03:24:24 AM
     #124
    Quote from: Ginz_24 on September 24, 2018, 02:58:21 AM
    -mantap-
    Sebetulnya ane ingin memberikan petunjuk, tapi nanti tidak fair dan tidak seru.
    Yang bisa ane katakan hanya agan hanya kurang satu tahap lagi, cara agan akan berhasil di challenge no 1, 3, dan 5, tapi tidak pada challenge ini.
    Semangat! Kalau teliti ada petunjuknya di update postingan ane selanjutnya dan lanjutkan dengan googling sedikit.

    Edit: hasilnya dihapus saja biar tidak dicontek member lain.
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  • Ginz_24
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    September 24, 2018, 05:36:54 AM
    Last edit: September 24, 2018, 05:56:54 AM by Ginz_24
    Merited by mu_enrico (1)
     #125
    Quote from: mu_enrico on September 24, 2018, 03:24:24 AM
    Sebetulnya ane ingin memberikan petunjuk, tapi nanti tidak fair dan tidak seru.
    Yang bisa ane katakan hanya agan hanya kurang satu tahap lagi, cara agan akan berhasil di challenge no 1, 3, dan 5, tapi tidak pada challenge ini.
    Semangat! Kalau teliti ada petunjuknya di update postingan ane selanjutnya dan lanjutkan dengan googling sedikit.

    Edit: hasilnya dihapus saja biar tidak dicontek member lain.

    #Partisipasi Challenge: Bruteforce Sederhana dan Sign Message
    (challenge 4)

    Code:
    Message:
    Alhamdulillah hari ini 24/09/2018 saya belajar sangat banyak dari forum ini, terimakasih om mu_enrico atas thread dan challange yang sangat bermanfaat ini. Saya Ginz_24 (https://bitcointalk.org/index.php?action=profile;u=2069480). Selama saya menjadi anggota di forum bitcointalk ini, tujuan awal saya adalah mencari pundi-pundi penghasilan dari sini. Tetapi setelah saya banyak membaca dan belajar semakin dalam, saya lebih tertarik lagi dengan ilmu dan pengetahuan yang ada di dalamnya. Semoga forum ini(khususnya SF Indo) tetap aktif dan selalu bermanfaat. Untuk para senior dan master semoga selalu memberikan kontribusi terbaiknya disini.

    Address: bc1q0wcqv6x49s52v6p955msrpfs4sjr76nwg3v677

    Signature: IIXRPLphPfiOiKcQowRTn8ta67jC/XxyFOHj0uGdoqBLCkX9zQbHy+6OpM/d/sQwNLfW8R5Uav7FSuFs7k3lp20=

  • mu_enrico
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    September 24, 2018, 10:22:05 AM
     #126
    Silahkan, jumlah postingan bukan penilaian. Semakin banyak malah semakin buruk.

    Quote from: mu_enrico on September 08, 2018, 06:12:20 AM
    <...>
    Kriteria peserta:
    - Satu akun hanya boleh ikut satu kali.
    - Challenge 1-4 maksimal jr member (merit <10).
    - Challenge 5-6 maksimal member (merit <100).
    - Kualitas post relatif baik, dalam arti tidak melakukan banyak spamming (post one-liner, dst), post OOT dst.
    - No redtrust.
    - Jumlah maksimal peserta 6 orang.
    <...>
    │
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    ▬▬▬▬▬▬▬▬▬▬
    ASTON VILLA FC
    BURNLEY FC
    		BK8?.
    ..PLAY NOW..

  • abhiseshakana
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    October 03, 2018, 07:43:36 PM
    Last edit: October 24, 2018, 10:05:23 PM by abhiseshakana
     #127
    Challenge #6 - Mining Quiz diperpanjang 1 Minggu (dengan alasan jumlah partisipan saat ini cuma 2 member saja (dari kuota 7 partisipan))



    Note :

    - Untuk ulasan Quiz akan saya uraikan pada tanggal 11 Oktober 2018.

    - Untuk 2 partisipan pertama tidak bisa mengikuti Quiz (Extra Time) ini lagi.

    - Untuk 2 partisipan yang jawabannya sudah masuk, reward akan saya kasih sekarang dengan ketentuan sbb :

    Quote from: oi95 on September 22, 2018, 11:52:51 AM
    * Partisipasi Challenge #6 - Mining Quiz - Periode 3

    * Account : oi95
    * Link Profile : https://bitcointalk.org/index.php?action=profile;u=1368542
    * Sudah mengisi Form submit jawaban : Done

    Jawaban benar : Tidak ada
    Reward merit : -


    Quote from: sebas7ian on September 23, 2018, 06:44:25 AM
    * Partisipasi Challenge #6 - Mining Quiz - Periode 3

    * Account : sebas7ian
    * Link Profile : https://bitcointalk.org/index.php?action=profile;u=2307690
    * Sudah mengisi Form submit jawaban : Done


    Jawaban benar : 1 Soal
    Reward : 1 Merit (done)



    Update :

    Partisipan

     


    Challenge #6 Mining - Quiz (Periode 3) : Archived


    Soal (Pertanyaan)

    Quote from: abhiseshakana on July 20, 2018, 12:00:05 PM
    Hashrate Global BTC mempunyai nilai rata-rata sebesar 77 Gh/s, jika waktu yang dibutuhkan untuk me-mining sebuah block rata-rata berkisar 10 menit, maka tentukanlah nilai dari :

    1. Tingkat difficulty saat ini
    2. Tingkat difficulty sebelumnya, yang terbentuk pada 15 hari sebelumnya.[/size]


    Jawaban

    1. Diketahui :
    - Global Hashrate = 77 Gh/s
    - Block Time = 10 menit = 600 detik
    - Difficulty = (Hashrate * Block time) : 2**32
    - Difficulty = (77.000.000.000 * 600) : 4.294.967.296 = 10.756,776
    (Ref : https://en.bitcoin.it/wiki/Difficulty)

    2. Diketahui :
    - Difficulty change 2016 Block
    - Block time 2016 Block = 15 hari = 21.600 Menit
    - Current Difficulty = Old diff * (2016 * 10 menit) : Block time Last 2016 Block
    - Old difficulty = Current Diff * Block time Last 2016 Block : 20.160
    - Old difficulty = 10.756,776 * 21.600 : 20.160 = 11.525,117
    (Ref : http://learnmeabitcoin.com/guide/difficulty)




    Update :

    Challenge #6 - Mining Quiz | Periode-4 On-Going!

    Buat calon partisipan yang berminat, silahkan menuju ke sini https://bt.irlbtc.com/view/3315373.msg42537165#msg42537165


    (Note : ini adalah post bump, dan akan saya hapus saat pelaksanaan quiz selesai ada post bump yang baru)

     
     
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  • Dante.444
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    October 21, 2018, 01:26:35 PM
     #128
    * Partisipasi Challenge #6 - Mining Quiz - Periode 4

    * Account : Dante.444
    * Link Profile : https://bitcointalk.org/index.php?action=profile;u=2312054
    * Sudah mengisi Form submit jawaban : Ya

  • GirL-Miner
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    October 25, 2018, 09:15:58 PM
     #129
    * Partisipasi Challenge #6 - Mining Quiz - Periode 4

    * Account : GirL-Miner
    * Link Profile : https://bitcointalk.org/index.php?action=profile;u=2447454
    * Sudah mengisi Form submit jawaban : Ya

  • sebas7ian
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    October 28, 2018, 08:47:23 PM
    Merited by dbshck (5)
     #130
    * Partisipasi Challenge #6 - Mining Quiz - Periode 4

    * Account : sebas7ian
    * Link Profile : https://bitcointalk.org/index.php?action=profile;u=2307690
    * Sudah mengisi Form submit jawaban : Ya

  • Sectorcleaar
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    October 31, 2018, 08:12:00 PM
    Last edit: October 31, 2018, 08:28:59 PM by Sectorcleaar
     #131
    * Partisipasi Challenge #6 - Mining Quiz - Periode 4

    * Account : Sectorcleaar
    * Link Profile :https://bitcointalk.org/index.php?action=profile;u=2039425
    * Sudah mengisi Form submit jawaban : Ya

    Ralat pak jawaban nomer 2 saya ubah , karna keburu kepencet saat submit form . Jawaban baru saya kirim di PM pak

  • abhiseshakana
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    November 07, 2018, 10:46:43 AM
    Merited by manjiLocked (2), joniboini (1)
     #132
    Ulasan Challenge #6 - Mining Quiz Periode-4

    - Archived
    - Jumlah partisipan : 4
    - Link jawaban peserta quiz : Sheets Jawaban



    Quote from: Dante.444 on October 21, 2018, 01:26:35 PM
    * Partisipasi Challenge #6 - Mining Quiz - Periode 4

    * Account : Dante.444
    * Link Profile : https://bitcointalk.org/index.php?action=profile;u=2312054
    * Sudah mengisi Form submit jawaban : Ya

    Jawaban salah dan tidak memenuhi syarat*


    Quote from: GirL-Miner on October 25, 2018, 09:15:58 PM
    * Partisipasi Challenge #6 - Mining Quiz - Periode 4

    * Account : GirL-Miner
    * Link Profile : https://bitcointalk.org/index.php?action=profile;u=2447454
    * Sudah mengisi Form submit jawaban : Ya

    Jawaban salah dan tidak memenuhi syarat*


    Quote from: sebas7ian on October 28, 2018, 08:47:23 PM
    * Partisipasi Challenge #6 - Mining Quiz - Periode 4

    * Account : sebas7ian
    * Link Profile : https://bitcointalk.org/index.php?action=profile;u=2307690
    * Sudah mengisi Form submit jawaban : Ya

    Jawaban keduanya benar (reward merit +5 by @dbshck)


    Quote from: Sectorcleaar on October 31, 2018, 08:12:00 PM
    * Partisipasi Challenge #6 - Mining Quiz - Periode 4

    * Account : Sectorcleaar
    * Link Profile :https://bitcointalk.org/index.php?action=profile;u=2039425
    * Sudah mengisi Form submit jawaban : Ya

    Ralat pak jawaban nomer 2 saya ubah , karna keburu kepencet saat submit form . Jawaban baru saya kirim di PM pak

    Jawaban salah dan tidak memenuhi syarat*


    * Rules : Setiap jawaban harus diuraikan dengan jelas (harus ada langkah-langkah pengerjaannya)



    Pembahasan


    Pertanyaan

    Quote from: abhiseshakana on July 20, 2018, 12:00:05 PM

    Quote
    Difficulty (BDiff) Bitcoin diketahui sebesar 623,3869598689275350875461418504115754357567263467498371464103120866973292

    1. Dengan menggunakan protocol yang berlaku, maka carilah nilai Target sekarang dalam format Compact 4 Bytes (Bits)

    2. Difficulty pada sebuah pool X menggunakan parameter PDiff (Pool Difficulty), dan pool hashrate diketahui sebesar 0.002 Th/s. Jika reward 1 block sebesar 50BTC, berapa jumlah coin (satoshi) yang bisa dihasilkan oleh miner A yang mempunyai avg hasrate sebesar 3 Mh/s, saat mining di PooL X selama 24 Jam ?

    Petunjuk :
    - Gunakan Protocol Bitcoin
    - Untuk hasil Target dalam bentuk decimal (soal No.1), abaikan nilai dibelakang tanda koma
    - https://www.calculator.net/big-number-calculator.html
    - https://www.mobilefish.com/services/big_number/big_number.php


    Jawaban

    1. Diketahui
    Difficulty (BDiff) = 623,3869598689275350875461418504115754357567263467498371464103120866973292
    Difficulty_1_Target (BDiff) = 0000 0000 FFFF 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 (32 Bytes)
    Convert Hex To Decimal = 2,6959535291011E+67
    = 26.959.535.291.011.309.493.156.476.344.723.991.336.010.898.738.574.164.086.137. 773.096.960

    Current Target = Difficulty_1_Target (BDiff) : Difficulty
    = 26.959.535.291.011.309.493.156.476.344.723.991.336.010.898.738.574.164.086.137. 773.096.960 623,3869598689275350875461418504115754357567263467498371464103120866973292
    = 43.246.870.766.561.725.070.861.386.869.077.695.524.372.774.526.710.079.316.876. 591.104,00000000007833149065
    = 43.246.870.766.561.725.070.861.386.869.077.695.524.372.774.526.710.079.316.876. 591.104


    Convert Decimal to Hex (43.246.870.766.561.725.070.861.386.869.077.695.524.372.774.526.710.079.316.876. 591.104)
    = 69 2098 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 (27 Bytes)
    1 Byte = 2 Hex Character
    27 Bytes = 54 Hex Character
    27 Bytes (in Decimal) = 1B Bytes (in Hex)

    - Bits (Target) : Current Target dalam Compact Format (32 bits 4 Bytes 8 Hex Character) (https://bitcoin.org/en/developer-reference#target-nbits)
    - Struktur target (Bits) 0xEECCCC terdiri dari EE = exponent dan CCCC = coefficient (significand),
    - Target 69 2098 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 (27 Bytes), dimana byte pertama 69 (105) lebih kecil dari 7F (127) maka tidak perlu ditambahkan zero digit sehingga ukurannya tetap 27 bytes.

    Maka :
    exponent = 27 Bytes (convert decimal form to hex form) = 1B = 0x1B
    coefficient = 692098 = 0x692098.
    Sehingga didapat Target (Bits) : 0x1B692098 = 1B692098

    Proof :
    Target = coefficient * 2^(8 * (exponent – 3))
    = 0x692098 * 2 ^ (0x08 * (0x1B - 0x03) >>>> Convert Hex to Decimal
    = 6.889.624 * 2 ^ (8 * (27 - 3))
    = 6.889.624 * 2 ^ (192)
    = 43.246.870.766.561.725.070.861.386.869.077.695.524.372.774.526.710.079.316.876. 591.104

    Jadi untuk nilai target Bits (4 Bytes) adalah 1B692098
    (Valid Proof bisa dilihat pada Block 77777 https://blockexplorer.com/block/00000000005f2ffd0a95ae6d0f96c82782093debe7118af13debfbf5d5e69b86)




    2. Diketahui
    Target (Bits) = 1B692098
    Recall 256 Bit (32 Byte) = 0000 0000 0069 2098 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
    Hex to Decimal = 43.246.870.766.561.725.070.861.386.869.077.695.524.372.774.526.710.079.316.876. 591.104

    Difficulty_1_Target (PDiff) = 0000 0000 FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF
    Hex to Decimal = 26.959.946.667.150.639.794.667.015.087.019.630.673.637.144.422.540.572.481.103. 610.249.215

    Difficulty (PDiff) = Difficulty_1_Target (Non-truncated target) : Current Target (256 Bit)
    Difficulty (PDiff) = 0000 0000 FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF FFFF 0000 0000 0069 2098 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000
    = 26.959.946.667.150.639.794.667.015.087.019.630.673.637.144.422.540.572.481.103. 610.249.215 43.246.870.766.561.725.070.861.386.869.077.695.524.372.774.526.710.079.316.876. 591.104
    = 623,39647214

    Pool Hashrate = 0.002 Th/s = 2 Gh/s = 2.000.000.000 h/s
    Difficulty (PDiff) = 623,39647214
    Reward = 50 BTC

    Block Time = difficulty * 2^32 hashrate
    = 623,39647214 * 4.294.967.296 2.000.000.000
    = 1.338,7337 detik = 22,31222883569 Menit

    24 Jam = 24 x 60 Menit = 1440 Menit
    Est. Block found 24H =  1440 : 22,31222883569 = 64,538599465
    Est. Block/Hash (24H) = 64,538599465 : 2.000.000.000 = 0,0000000322692997325 Block

    Miner A Hashrate = 3 Mh/s = 3.000.000 h/s
    Block found 24 H = 0,0000000322692997325 * 3.000.000 = 0,0968078992 Block
    BTC earn 24 H = 0,0968078992 * 50 BTC = 4,84039496 BTC = 484.039.496 Satoshi

    Jadi dalam sehari Miner A akan mendapatkan hasil mining sekitar 484.039.496 Satoshi (4,84039496 BTC)

    Proof :
    https://www.coinwarz.com/calculators/bitcoin-mining-calculator/?h=0.003&p=1320.00&pc=0.10&pf=0.00&d=623.39647214&r=50&er=6579.00000000&hc=0.00





    Ref :
    https://en.bitcoin.it/wiki/Difficulty
    https://blockexplorer.com/block/00000000005f2ffd0a95ae6d0f96c82782093debe7118af13debfbf5d5e69b86
    https://www.calculator.net/big-number-calculator.html
    https://www.mobilefish.com/services/big_number/big_number.php
    https://www.coinwarz.com/calculators/bitcoin-mining-calculator/

    Credit to :
    @dbshck (untuk reward Quiz)
     
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  • abhiseshakana
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    November 12, 2018, 11:14:40 AM
    Merited by mu_enrico (1)
     #133
    Challenge #6 - Mining Quiz | Periode-5 | On-Going

    Quote from: abhiseshakana on July 20, 2018, 12:00:05 PM
    Quiz (Pertanyaan)

    Quote
    Diketahui sebuah Coin mempunyai algoritma mining Sha256, dengan data-data Block header sebagai berikut :

    Version536870912
    Previous Block00000000000000002ac7f20c4b909f5857d3363700d3648958fd4675beb534a2
    Merkle Roote04a3b043d76ace078283db0ff61910f61cb06a685f5a3dee0701d48c064c9f4
    Time2018-Nov-08 22:28:09 (UTC)
    Bits420106321
    Nonce3021489935

    1. Dengan ke-6 data diatas, sebuah node dapat melakukan proses verifikasi dengan cara mencari hash dari Block tersebut. Berapakah nilai Hash dari Block yang dimaksud ?
    2. Dan jika diketahui hashrate dari sebuah Pool sebesar 2 Ph/s, berapa rata-rata Block yang dapat ditemukan dalam 24 jam jika menggunakan ketentuan Pool Difficulty (PDiff) ?

    Untuk detail (syarat, rules, petunjuk, dll) Quiz bisa dilihat disini Challenge #6 - Mining Quiz | Periode-5 | On-Going
     
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  • GirL-Miner
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    November 15, 2018, 05:15:29 AM
     #134
    * Partisipasi Challenge #6 - Mining Quiz - Periode 5

    * Account : GirL-Miner
    * Link Profile : https://bitcointalk.org/index.php?action=profile;u=2447454
    * Sudah mengisi Form submit jawaban : Ya

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    November 22, 2018, 02:50:36 PM
    Merited by warda1989 (1)
     #135
    Challenge tanya jawab seputar bitcoin batch #2 sudah dibuka. Silakan berpartisipasi.

    https://bt.irlbtc.com/view/3315373.msg35321526#msg35321526
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  • Anjing_lu
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    November 22, 2018, 09:37:15 PM
     #136
    #Partisipasi Challenge #5
    Pertanyaan #2
    Nama akun:  Anjing_lu https://bitcointalk.org/index.php?action=profile;u=2434082
    Challenge yang diikuti: Tanya jawab seputar Bitcoin.
    Sudah mengisi google form?: Ya.

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    November 24, 2018, 01:40:00 PM
    Last edit: November 25, 2018, 12:27:24 AM by flyeers309
     #137
    #Partisipasi Challenge #5

    Pertanyaan: #3 & #4
    Nama akun: flyeers309
    Link profile akun: https://bitcointalk.org/index.php?action=profile;u=2431704
    Challenge yang diikuti: Tanya jawab seputar Bitcoin.
    Sudah mengisi google form?: Ya.

  • Dante.444
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    November 25, 2018, 05:07:32 AM
     #138
    * Partisipasi Challenge #6 - Mining Quiz - Periode 5

    * Account : Dante.444
    * Link Profile : https://bitcointalk.org/index.php?action=profile;u=2312054
    * Sudah mengisi Form submit jawaban : Ya

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    November 25, 2018, 11:27:02 PM
    Merited by dbshck (5), mu_enrico (2), elda34b (2)
     #139
    Ulasan Challenge #6 - Mining Quiz Periode-5

    - Archived
    - Jumlah partisipan : 2
    - Link jawaban peserta quiz : Sheets Jawaban

    Quote from: Dante.444 on November 25, 2018, 05:07:32 AM
    * Partisipasi Challenge #6 - Mining Quiz - Periode 5

    * Account : Dante.444
    * Link Profile : https://bitcointalk.org/index.php?action=profile;u=2312054
    * Sudah mengisi Form submit jawaban : Ya

    Jawaban salah dan tidak memenuhi syarat* (No reward)


    Quote from: GirL-Miner on November 15, 2018, 05:15:29 AM
    * Partisipasi Challenge #6 - Mining Quiz - Periode 5

    * Account : GirL-Miner
    * Link Profile : https://bitcointalk.org/index.php?action=profile;u=2447454
    * Sudah mengisi Form submit jawaban : Ya

    Jawaban benar 1, tetapi tidak memenuhi syarat* (No reward)


    * Rules : Setiap jawaban harus diuraikan dengan jelas (harus ada langkah-langkah pengerjaannya)


    Pembahasan


    Pertanyaan :

    Quote from: abhiseshakana on July 20, 2018, 12:00:05 PM

    Quote
    Diketahui sebuah Coin mempunyai algoritma mining Sha256, dengan data-data Block header sebagai berikut :

    Version536870912
    Previous Block00000000000000002ac7f20c4b909f5857d3363700d3648958fd4675beb534a2
    Merkle Roote04a3b043d76ace078283db0ff61910f61cb06a685f5a3dee0701d48c064c9f4
    Time2018-Nov-08 22:28:09 (UTC)
    Bits420106321
    Nonce3021489935

    1. Dengan ke-6 data diatas, sebuah node dapat melakukan proses verifikasi dengan cara mencari hash dari Block tersebut. Berapakah nilai Hash dari Block yang dimaksud ?
    2. Dan jika diketahui hashrate dari sebuah Pool sebesar 2 Ph/s, berapa rata-rata Block yang dapat ditemukan dalam 24 jam jika menggunakan ketentuan Pool Difficulty (PDiff) ?



    Jawaban :

    1. Merubah ke-6 fields diatas dengan melakukan swap endian (reverse per Byte). Supaya tidak terjadi kesalahan penulisan data, lebih mudah jika Hex digit dipisahkan per 1 byte (2 Hex digits)

    - Convert Version ke hex, lalu lakukan swap endian (reverse per Byte)
    Version536870912
    Version (Hex)20 00 00 00
    Reverse00 00 00 20

    - Lakukan swap endian (reverse per Byte) pada Previous Block
    Previous Block00 00 00 00 00 00 00 00 2a c7 f2 0c 4b 90 9f 58 57 d3 36 37 00 d3 64 89 58 fd 46 75 be b5 34 a2
    Reversea2 34 b5 be 75 46 fd 58 89 64 d3 00 37 36 d3 57 58 9f 90 4b 0c f2 c7 2a 00 00 00 00 00 00 00 00
    Reversea234b5be7546fd588964d3003736d357589f904b0cf2c72a0000000000000000

    - Reverse Merkle Root (swap endian)
    Merkle Roote0 4a 3b 04 3d 76 ac e0 78 28 3d b0 ff 61 91 0f 61 cb 06 a6 85 f5 a3 de e0 70 1d 48 c0 64 c9 f4
    Reversef4 c9 64 c0 48 1d 70 e0 de a3 f5 85 a6 06 cb 61 0f 91 61 ff b0 3d 28 78 e0 ac 76 3d 04 3b 4a e0
    Reversef4c964c0481d70e0dea3f585a606cb610f9161ffb03d2878e0ac763d043b4ae0


    - Merubah bentuk waktu ke (epoch) timestamp, lalu convert to Hex dan lakukan swap endian (reverse).
    Time2018-Nov-08 22:28:09
    Timestamp1541716089 (https://timestampgenerator.com)
    Timestamp (Hex)5be4b879
    Reverse79b8e45b

    - Merubah Bits ke bentuk Hex, lalu lakukan swap endian (reverse)
    Bits420106321
    Bits (Hex)190a5051
    Reverse51500a19

    - Merubah Nonce ke bentuk Hex, lalu lakukan swap endian (reverse)
    Nonce3021489935
    Nonce (Hex)b418470f
    Reverse0f4718b4

    - Mencari nilai Header_Hex = Rev Version + Rev Prev Block + Rev Merkle Root + Rev Timestamp + Rev Rev Bits + Rev Nonce
    Header_Hex = 00000020 + a234b5be7546fd588964d3003736d357589f904b0cf2c72a0000000000000000 + f4c964c0481d70e0dea3f585a606cb610f9161ffb03d2878e0ac763d043b4ae0 + 79b8e45b + 51500a19 + 0f4718b4

    - Melakukan double hashing pada Header_Hex, dan untuk final hash harus dilakukan swap endian (reverse)
    Double Hashing Sha256= Sha256 (sha256 (Header_Hex))
    Block hash= Reverse (Double Hashing Sha256)

    # Cara 1 menggunakan calculator dari http://extranet.cryptomathic.com/hashcalc/index
    sha256 (Header_Hex) = Sha256(00000020a234b5be7546fd588964d3003736d357589f904b0cf2c72a0000000000000000f4c964c 0481d70e0dea3f585a606cb610f9161ffb03d2878e0ac763d043b4ae079b8e45b51500a190f4718 b4)

    sha256 (Header_Hex) = 9693d04d327f184ebf97e70995ac1b844cf79c9231b449095a1030887c8e2732



    Sha256 (Sha256 (Header_Hex) = Sha256 (9693d04d327f184ebf97e70995ac1b844cf79c9231b449095a1030887c8e2732)
    Double Hashing Sha256    = 04b1bccf8b83dbac2921233c100132d07515ecbfd18f23cc0100000000000000
    Double Hashing Sha256    = 04 b1 bc cf 8b 83 db ac 29 21 23 3c 10 01 32 d0 75 15 ec bf d1 8f 23 cc 01 00 00 00 00 00 00 00



    Lalu lakukan swap endian (reverse per Byte) untuk Final Hash
    Block hash      = 00 00 00 00 00 00 00 01 cc 23 8f d1 bf ec 15 75 d0 32 01 10 3c 23 21 29 ac db 83 8b cf bc b1 04
    Block hash      = 0000000000000001cc238fd1bfec1575d03201103c232129acdb838bcfbcb104



    # Cara 2 melakukan double Hashing dengan Python :

    >>> import hashlib, binascii
    >>> from binascii import unhexlify
    >>> from hashlib import sha256
    >>> header = unhexlify("00000020a234b5be7546fd588964d3003736d357589f904b0cf2c72a0000000000000000f4c964c 0481d70e0dea3f585a606cb610f9161ffb03d2878e0ac763d043b4ae079b8e45b51500a190f4718 b4")
    >>> sha256(sha256(header).digest()).hexdigest()



    Result       = '04b1bccf8b83dbac2921233c100132d07515ecbfd18f23cc0100000000000000' >>> (Swap endian Reverse per Byte)
    Block hash   = 0000000000000001cc238fd1bfec1575d03201103c232129acdb838bcfbcb104


    Valid Proof :

    https://explorer.litecoinca.sh/block/0000000000000001cc238fd1bfec1575d03201103c232129acdb838bcfbcb104



    2. Diketahui Bits = 420106321 = 190a5051
    Target = Coefficient * 2^(8 * (exponent - 3)
    Target = 0x0a5051 * 2^(8 * (0x19 - 3)
    Target = 675.921 * 2^(8 * (25 - 3)
    Target = 675.921 * 95.780.971.304.118.053.647.396.689.196.894.323.976.171.195.136.475.136
    Target = 64.740.369.904.850.778.939.402.017.558.654.008.356.297.610.387.841.410.400.256

    Convert to Hex and recall 256 Bit
    Hex Target = 0a 5051 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 (25 Bytes)
    Hex Target = 0000 0000 0000 000a 5051 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 0000 (32 Bytes)

    Difficulty_1_target = 0x00000000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF (PDiff)
    Difficulty = difficulty_1_target current_target
    Difficulty = 0x00000000FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF 0x000000000000000a505100000000000000000000000000000000000000000000
    Difficulty = 26.959.946.667.150.639.794.667.015.087.019.630.673.637.144.422.540.572.481.103. 610.249.215 64.740.369.904.850.778.939.402.017.558.654.008.356.297.610.387.841.410.400.256
    Difficulty = 416.431.767,48563219

    Block Time = Difficulty * 2^32 Hashrate
    Block Time = 416.431.767,48563219 * 2^32 2.000.000.000.000.000 h/s
    Block Time = 894,28 second = 14 minute 54,28 second

    Block Found (1 Day) = 24 Hour 894,28 second
    Block Found (1 Day) = 86.400 894.28
    Block Found (1 Day) = 96,6 = 97 Blocks (Average)

     


    Ref :
    https://en.bitcoin.it/wiki/Block_hashing_algorithm
    https://en.bitcoin.it/wiki/Difficulty
    https://timestampgenerator.com/
    https://www.mobilefish.com/services/big_number/big_number.php
    http://extranet.cryptomathic.com/hashcalc/index
     
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  • iascsa
    Newbie
    *
    Offline Offline

    Activity: 5
    Merit: 0


    View Profile
    December 18, 2018, 03:21:15 AM
     #140
    mau ikut, tapi masih newbie..

    Masihkah saya bisa mengikuti challenge ini?
    Terimakasih.
    Pages: « 1 2 3 4 5 6 [7]  All
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