blockchain.tokyo#18-2019-03-26

Transcript

1. 01@$0%&Λ࢖ͬͨ#$)ͱ#47
   ͷεϓϦοτํ๏ʹ͍ͭͯ
   Tomokazu Kozuma
   2019 / 03 / 26 / TUE
   blockchain.tokyo #18
   

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2. A B O U T M Y S E L F
   ࣗݾ঺հ
   Tomokazu Kozuma
   @Tomokazu106
   ౦ژ޻ۀେֶେֶӃଔۀޙɺαΠόʔΤʔδΣϯτͰεϚϗήʔϜͷαʔόɺΠϯ
   ϑϥશൠΛ୲౰ɻԾ૝௨՟ʹ͍ٕͭͯज़ϒϩάΛॻ͍ͯΔ͏ͪʹ຅಄͠ɺຊ৬ͱ
   ͯ͠஫ྗ͢ΔͨΊʹ(JODPʹೖࣾɻ(JODPͰ͸ϒϩοΫνΣʔϯͷϊʔυӡ༻ɺϋʔ
   υϑΥʔΫରԠɺόοΫΤϯυͳͲ޿ൣғΛ୲౰ɻ
   

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3. ·ͱΊͯͻͱͭʹ
   BITCOIN
   Blockchain
   BITCOIN
   CASH
   Blockchain
   LITECOIN
   Blockchain
   XRP(Ripple)
   Blockchain
   ETHEREUM
   CLASSIC
   Blockchain
   ETHEREUM
   Blockchain
   

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4. ෳ਺ͷԾ૝௨՟Λ·ͱΊͯ؅ཧ
   

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5. (JODPʹ͓͚Δ#47ରԠʹ͍ͭͯ
   • ࡢ೥຤ʹ#47Λ(JODPͰରԠ͢Δͷ͸ܾ·ͬͯͨ
   • ͔͠͠ɺ๏తʹ#47ϊʔυ͕ݐͯΒΕͳ͍ͱ͍͏͜ͱ
   Ͱਖ਼ࣜରԠͰ͖ͳ͔ͬͨ
   • #$)Λ҆શʹૹۚͰ͖ΔΑ͏ʹεϓϦοτػೳΛ࣮૷
   

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6. ֓ཁ
   • #$)ͱ#47ͷಛ௃ͱ໰୊఺
   • ͭͷεϓϦοτํ๏
   • 01@$)&$,%"5"4*(Λ࢖ͬͨεϓϦοτ
   A g e n d a
   

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7. #$)ͱ#47ͷಛ௃ͱ໰୊఺
   P A R T 1
   

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8. #$)ͱ#47ͷಛ௃
   • #$)͸#5$͔Β)'ʢ೥݄೔ʣ
   • #47͸#$)͔Β)'ʢ೥݄೔ʣ
   • ͲͪΒ΋ϒϩοΫαΠζΛେ͖͘͠ɺΦϯνΣʔϯͰ
   εέʔϥϏϦςΟ໰୊Λղܾ͢Δ͜ͱΛ໨ࢦ͍ͯ͠Δ
   T I T L E T E X T
   

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9. #$)ͱ#47ͷಛ௃
   • 01@$0%&ͷ෮ݩɿ

   01@.6-ɺ01@-4)*'5ɺ01@34)*'5ɺ01@*/7&35
   • εΫϦϓτ͋ͨΓ01@$0%&ͷ੍ݶΛऔΓআ͘
   • ࠷େϒϩοΫαΠζΛ.#·Ͱ֦େ
   F e a t u r e o f B C H a n d B S V
   • ৽ن01@$0%&ɿ01@$)&$,%"5"4*( 7&3*':
   
   • $BOPOJDBM5SBOTBDUJPO0SEFSJOHʢ$503ʣͷಋೖ
   B C H ɿ B i t c o i n A B C
   B S V ɿ n C h a i n
   

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10. #$)ͱ#47ͷ໰୊఺
    • ϦϓϨΠϓϩςΫγϣϯػೳ͕ͳ͍ʢ#$)ʹ݄ಋೖ༧ఆʣ
    P r o b l e m
    • #$)Λૹۚ͢Δͱ#47΋ૹۚ͞Ε

    ˠτϥϯβΫγϣϯϦϓϨΠ͕ൃੜ
    • ͓٬༷͕ࢿ࢈Λ҆શʹ؅ཧͰ͖ΔΑ͏ʹ͢Δඞཁ͕͋Δ

    ˠεϓϦοτػೳΛ࣮૷
    

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11. ͭͷεϓϦοτํ๏
    P A R T 2
    

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12. 5
    5
    S p l i t
    %VTU5SBOTBDUJPO
    O-PDL5JNF
    01@$0%&
    ͭͷεϓϦοτํ๏
    

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13. %VTU5SBOTBDUJPO
    • ख਺ྉͱͯ͠औΓࠐ·Εͳ͍࠷௿ֹۚʢTBUʣͷ
    6590Λ࢖༻
    A b o u t D u s t T r a n s a c t i o n ?
    • #$)ʹ͔͠ଘࡏ͠ͳ͍%VTU5YΛΠϯϓοτʹؚΊͯ
    ૹۚ͢Δ
    • #47ͷνΣʔϯʹ͸ଘࡏ͠ͳ͍6590͕Πϯϓοτʹ
    ؚ·Ε͍ͯΔͨΊঝೝ͞Εͳ͍
    

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14. O-PDL5JNF
    • τϥϯβΫγϣϯʹࢦఆͰ͖Δύϥϝʔλ
    A b o u t n L o c k T i m e
    • ࢦఆͨ͠ϒϩοΫߴɺ6OJY5JNF·ͰϒϩοΫʹ
    औΓࠐ·Εͳ͍
    • #$)ͱ#47ͷ࠷৽ϒϩοΫߴͷࠩΛར༻ͯ͠
    εϓϦοτ͢Δํ๏
    

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15. εϓϦοτͷൺֱ
    εϓϦοτํ๏ ϝϦοτ σϝϦοτ
    %VTU5SBOTBDUJPO
    ࣮૷͕͍Βͳ͍
    ༰қʹ࣮ߦͰ͖Δ
    εϓϦοτ͢Δʹ͸෼཭ࡁͷ6590͕ඞཁ
    શͯͷ΢ΥϨοτʹରͯ͠ૹۚ͢Δඞཁ͕͋Δ
    O-PDL5JNF ࣮૷΄΅͕͍Βͳ͍
    #$)ͱ#47ͷϒϩοΫߴ͕཭Ε͍ͯΔඞཁ͕͋Δ
    ஌͕ࣝͳ͍ͱૹۚλΠϛϯά͕Θ͔Βͳ͍
    01@$0%&
    01@$)&$,%"5"4*(
    
    ͍ͭͰ΋ԿճͰ΋
    εϓϦοτͰ͖Δ
    ௐࠪͱ࣮૷͕গ͠େม
    

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16. 01@$0%&Λ࠾༻ͨ͠ཧ༝
    • ೚ҙͷλΠϛϯάͰԿճ΋εϓϦοτͰ͖Δ

    ˠ̍ճ͋ͨΓԁ͘Β͍
    • ஌͕ࣝͳͯ͘΋؆୯ʹ࣮ߦͰ͖Δ
    • ࣄۀऀଆͷίετෛ୲͕ͳ͍
    R e a s o n t o U s e O P _ C O D E
    

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17. 01@$)&$,%"5"4*(Λ
    ࢖ͬͨεϓϦοτ
    P A R T 3
    

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18. 01@$)&$,%"5"4*(ͱ͸ʁ
    • ϒϩοΫνΣʔϯ֎ͷσʔλʢΦϥΫϧʣͷॺ໊ݕূΛߦ͑Δ
    A b o u t O P _ C H E C K D A T A S I G
    OP_CHECKDATASIG
    S c r i p t
    • ΦϥΫϧ͕࢖͑ΔͷͰΞτϛοΫεϫοϓ΁ͷԠ༻ʹظ଴
    

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19. 5
    S p l i t U s i n g P 2 P K H a n d P 2 S H
    εϓϦοτͷखॱ
    3FEFFN4DSJQUͷߏஙͱղআ
    01@$)&$,%"5"4*(Λ࢖ͬͨεϓϦοτํ๏
    

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20. εϓϦοτͷखॱ
    • εϓϦοτ͸ࣗ෼΁શֹૹۚΛճߦ͏
    F l o w o f S p l i t
    • ճ໨͸01@$)&$,%"5"4*(Λ3FEFFN4DSJQUʹ
    ؚΉΞυϨεʹૹۚ͢Δ͜ͱ͕໨త
    • ճ໨ͷૹۚ͸01@$)&$,%"5"4*(ΛؚΉ6590Λ
    ղআͯ͠11,)ʹૹۚ͢Δ͜ͱ͕໨త
    

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21. ճ໨ͷશֹૹۚ
    • 01@$)&$,%"5"4*(ΛؚΉ14)ΞυϨεʹTBUૹۚ
    *OQVU 0VUQVU
    #$)#47
    #$)#47
    #$)#47
    TBU
    #$)#47
    ͓௼Γ
    14)"EESFTT
    11,)"EESFTT
    • #47Ͱ͸14)ͷ6590͕࢖͑ͳ͍ͷͰ࠷௿ֹۚʹ͓ͯ͘͠
    

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22. ճ໨ͷશֹૹۚ
    • 01@$)&$,%"5"4*(Ͱ࡞ΒΕͨ6590ΛؚΜͩૹۚΛ͢Δ͜
    ͱͰ෼཭Ͱ͖Δ
    *OQVU 0VUQVU
    શֹ#$)
    TBU
    #$)#47
    ͓௼Γ
    14)"EESFTT
    11,)"EESFTT
    11,)"EESFTT
    • #47Ͱ࢖͑Δͷ͸ճ໨ͷૹۚͰ͓௼Γͱͯ͠ૹͬͨ෼͚ͩ
    

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23. 3FEFFN4DSJQUͷߏங
    • 3FEFFN4DSJQU಺Ͱॺ໊ݕূ͕׬݁͢ΔΑ͏ߏங
    B u i l d i n g R e d e e m S c r i p t
    OP_CHECKDATASIGVERIFY
    R e d e e m S c r i p t
    • ͜Εͩͱ୭Ͱ΋ղআͯ͠࢖༻͢Δ͜ͱ͕Ͱ͖ͯ͠·͏ͷͰɺ
    3FEFFN4DSJQUʹࣗ෼ͷެ։伴Λ૊ΈࠐΉ
    

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24. • 11,)Λ3FEFFN4DSJQUʹ૊ΈࠐΉ
    OP_CHECKDATASIGVERIFY
    OP_DUP OP_HASH160 <20-bytes-pubkey-hash> OP_EQUALVERIFY OP_CHECKSIG
    R e d e e m S c r i p t
    3FEFFN4DSJQUͷߏங
    B u i l d i n g R e d e e m S c r i p t
    

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25. 3FEFFN4DSJQUͷղআ
    • 3FEFFN4DSJQUͷαΠζ͕#ZUFTΛ௒͑ΔͷͰ
    01@164)%"5"Λ࢖͏
    L o c k i n g S c r i p t
    OP_HASH160 <20-bytes-redeem-script—hash> OP_EQUAL
    U n l o c k i n g S c r i p t
    OP_PUSHDATA1 redeem-script
    

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26. ·ͱΊ
    • ϦϓϨΠϓϩςΫγϣϯ͕ϓϩτίϧʹ૊Έࠐ·Ε͍ͯͳͯ͘΋
    ࢓༷ʹΑͬͯ͸ରԠͰ͖Δ
    • 01@$0%&Λ࢖͏ͱϢʔβͷ೚ҙͷλΠϛϯάͰεϓϦοτͰ͖ɺ
    ίετ͕΄΅͔͔Βͳ͍
    S u m m a r y
    

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