Smart Contract Design Pattern

4NBSU$POUSBDU%FTJHO1BUUFSO ,B[VLJ:BNBHVDIJ!ZBNBSL[ CMPDLDIBJOUPLZP

/BNF,B[VLJ:BNBHVDIJ $BSFFS(VOPTZJOD-BZFS9JOD +PC4PGUXBSF&OHJOFFS #MPDLDIBJO4NBSU$POUSBDU 4/4(JUIVC5XJUUFS !ZBNBSL[

CMPDLDIBJOUPLZPςʔϚ εϚʔτίϯτϥΫτ։ൃUJQT

ࠓ೔࿩͢͜ͱ εϚʔτίϯτϥΫτ։ൃʹ͓͚Δ ՝୊ղܾͷϕετϓϥΫςΟε lσβΠϯύλʔϯzʹ͍ͭͯ঺հ͠·͢ ˞4PMJEJUZΛ༻͍ͨεϚʔτίϯτϥΫτ։ൃΛલఏͱ͍ͯ͠·͢

ຊൃදͷ(0"- σβΠϯύλʔϯͱ͸Կͳͷ͔͕Θ͔͍ͬͯΔ εϚʔτίϯτϥΫτ։ൃʹ͓͚ΔσβΠϯύλʔϯͷશମ૾Λཧղ͍ͯ͠Δ ࣮ࡍͷ։ൃʹσβΠϯύλʔϯ׆༻͍͚ͯ͠Δঢ়ଶʹͳ͍ͬͯΔ -FU`T(P

σβΠϯύλʔϯͱ͸ σβΠϯύλʔϯΛֶͼɺཧղ͠ɺ׆༻͢Δҙٛ σβΠϯύλʔϯͷ෼ྨ σβΠϯύλʔϯͷ঺հ 4UBUF.BDIJOF1BUUFSO $PNNJUBOE3FWFBM1BUUFSO 4BUFMMJUF1BUUFSO σβΠϯύλʔϯͷݚڀ ·ͱΊ "HFOEB

σβΠϯύλʔϯͱ͸

σβΠϯύλʔϯͱ͸ʜʁ

σβΠϯύλʔϯͱ͸ σβΠϯύλʔϯઃܭͷܕ σβΠϯઃܭ ύλʔϯܕ

σβΠϯύλʔϯͱ͸ σβΠϯύλʔϯઃܭͷܕ σβΠϯઃܭ ύλʔϯܕ ։ൃ࣮૷ͷઃܭܕΛzσβΠϯύλʔϯzͱ͍͏

σβΠϯύλʔϯͱ͸ ίϯτϥΫτ։ൃʹ͓͍ͯɺԿ౓΋܁Γฦ͠ݱΕΔ࣮૷ߏ଄ʹܕ ύλʔϯ Λݟग़͠ɺ ͦͷܕ ύλʔϯ ͔Βந৅తͳॲཧͷઃܭ σβΠϯ Λ࡞Γग़͠ɺಛఆͷ՝୊Λղܾ͢ Δ൚༻తͳॲཧͷઃܭܕ
σβΠϯύλʔϯ ͱͯ͠ఆٛͨ͠΋ͷɻ ݫີʹσβΠϯύλʔϯΛఆٛ͢Δͱ ͭ·Γɺ සग़͢Δ՝୊ղܾͷϕετϓϥΫςΟε ࠷ྑͷղܾखஈ ͕ɺ σβΠϯύλʔϯ

σβΠϯύλʔϯͱ͸ ՝୊ղܾ࣮૷" ՝୊ղܾ࣮૷# ՝୊ղܾ࣮૷# ڞ௨ͷ࣮૷՝୊ ڞ௨͢ΔղܾΞϓϩʔν ۩৅ ந৅ ϕετϓϥΫςΟε ҟͳΔΞϓϩʔνͰͷ՝୊ղܾ
ҟͳΔղܾΞϓϩʔν͔Βڞ௨ͨ͠ղܾΞϓϩʔνΛநग़ ֓೦ਤ

ڞ௨͢ΔղܾΞϓϩʔν ந৅ ҟͳΔղܾΞϓϩʔν͔Βڞ௨ͨ͠ղܾΞϓϩʔνΛநग़ ϕετϓϥΫςΟε σβΠϯύλʔϯͱ͸ ֓೦ਤ ՝୊ղܾ࣮૷" ՝୊ղܾ࣮૷# ՝୊ղܾ࣮૷# ۩৅
ҟͳΔΞϓϩʔνͰͷ՝୊ղܾ ڞ௨ͷ࣮૷՝୊

ڞ௨ͷ࣮૷՝୊ ϕετϓϥΫςΟε ҟͳΔΞϓϩʔνͰͷ՝୊ղܾ σβΠϯύλʔϯͱ͸ ֓೦ਤ ڞ௨͢ΔղܾΞϓϩʔν ՝୊ղܾ࣮૷" ՝୊ղܾ࣮૷# ՝୊ղܾ࣮૷# ۩৅
ҟͳΔղܾΞϓϩʔν͔Βڞ௨ͨ͠ղܾΞϓϩʔνΛநग़ ந৅

۩৅ ՝୊ղܾ࣮૷" ՝୊ղܾ࣮૷# ՝୊ղܾ࣮૷# ҟͳΔΞϓϩʔνͰͷ՝୊ղܾ ҟͳΔղܾΞϓϩʔν͔Βڞ௨ͨ͠ղܾΞϓϩʔνΛநग़ ڞ௨ͷ࣮૷՝୊ ϕετϓϥΫςΟε ڞ௨͢ΔղܾΞϓϩʔν σβΠϯύλʔϯͱ͸
֓೦ਤ ڞ௨ͷ࣮૷՝୊ͱϕετϓϥΫςΟεΛఆٛ ந৅

՝୊ղܾ࣮૷" ՝୊ղܾ࣮૷# ՝୊ղܾ࣮૷# ۩৅ ந৅ ҟͳΔΞϓϩʔνͰͷ՝୊ղܾ ҟͳΔղܾΞϓϩʔν͔Βڞ௨ͨ͠ղܾΞϓϩʔνΛநग़ ڞ௨ͷ࣮૷՝୊ ϕετϓϥΫςΟε ڞ௨͢ΔղܾΞϓϩʔν
σβΠϯύλʔϯͱ͸ ֓೦ਤ ڞ௨ͷ࣮૷՝୊ͱϕετϓϥΫςΟεΛఆٛ ࣍ʹɺ͜ͷσβΠϯύλʔϯΛֶͿҙٛʹ͍ͭͯ֬ೝ͍͖ͯ͠·͢

σβΠϯύλʔϯΛֶͼɺཧղ͠ɺ׆༻͢Δҙٛ

ͳͥσβΠϯύλʔϯֶͿͷ͔ʜ

σβΠϯύλʔϯΛֶͿཧ༝͸େ͖ͭ͋͘Δ ղܾࡦͷ࠶ར༻ ઌਓୡͷܦݧͱ࣮੷ʹΑཱͬͯ֬͞ΕͨσβΠϯύλʔϯʹଇΓɺطग़ͷ՝୊Λૉૣ͘ղܾ ͢Δ͜ͱͰɺσβΠϯύλʔϯΛ༻͍ͯ͸ղܾͰ͖ͳ͍ຊ࣭తͳ՝୊ղܾʹूத͢Δɻ ·ͨɺϕετϓϥΫςΟεʹଇΔͨΊ৽ͨͳόάΛੜΈग़ͮ͠Β͘ͳΔɻ ڞ௨༻ޠɾڞ௨ೝࣝͷཱ֬ σβΠϯύλʔϯͷཧղʹΑΓɺ։ൃऀؒͷίϛϡχέʔγϣϯʹڞ௨ͷޠኮ ղܾ՝୊໊ ύλʔϯ໊
ͱڞ௨ͷೝࣝ ந৅֓೦ ཱ͕֬͞Εɺઃܭͱ։ൃͷٞ࿦͕ԁ׈ʹਐΉ༷ʹͳ Δɻ݁Ռɺ։ൃ଎౓ͷ޲্ͱɺ՝୊ղܾͷີͳٞ࿦͕Ͱ͖Δ༷ʹͳΔɻ ઃܭɾ։ൃྗͷ޲্ ༏Εͨ՝୊ղܾΞϓϩʔνΛֶͿ͜ͱͰɺૺ۰͢Δ՝୊Λந৅తʹଊ͑ΒΕΔΑ͏ʹͳΓɺ ݁ՌɺίϯτϥΫτ։ൃʹ͓͚Δ՝୊෼ੳ՝୊ղܾྗ͕޲্͢Δɻ

ղܾࡦͷ࠶ར༻ ઌਓୡͷܦݧͱ࣮੷ʹΑཱͬͯ֬͞ΕͨσβΠϯύλʔϯʹଇΓɺطग़ͷ՝୊Λૉૣ͘ղܾ ͢Δ͜ͱͰɺσβΠϯύλʔϯΛ༻͍ͯ͸ղܾͰ͖ͳ͍ຊ࣭తͳ՝୊ղܾʹूத͢Δɻ ·ͨɺϕετϓϥΫςΟεʹଇΔͨΊ৽ͨͳόάΛੜΈग़ͮ͠Β͘ͳΔɻ ཁٻ ՝୊ ղܾࡦ ؔ਺"͸ঝೝ͞ΕͨΞΧ΢ϯτ͚͕ͩ ݺͼग़ͤΔΑ͏ʹ͍ͨ͠ ࣌ؒܦաʹΑͬͯίϯτϥΫτͷৼΔ෣͍Λมߋ͍ͨ͠
σϙδοτϩοΫҾ͖ग़͠ ίϛοτ͢Δσʔλ͸ൿಗੑΛ୲อ͠ɺ໌Β͔ʹ͢Δ λΠϛϯάͰίϛοτσʔλͷ੔߹ੑ͕อͨΕ͍ͯΔ ͜ͱΛূ໌͍ͨ͠ "DDFTT3FTUSJDUJPO1BUUFSO 4UBUF.BDIJOF1BUUFSO $PNNJUBOE3FWFBM1BUUFSO සग़͢Δ՝୊͸ཱ֬͞ΕͨղܾࡦͰղܾ͢Δ

ڞ௨༻ޠɾڞ௨ೝࣝͷཱ֬ σβΠϯύλʔϯͷཧղʹΑΓɺ։ൃऀؒͷίϛϡχέʔγϣϯʹڞ௨ͷޠኮ ղܾ ՝୊໊ύλʔϯ໊ ͱڞ௨ͷೝࣝ ந৅֓೦ ཱ͕֬͞Εɺઃܭͱ։ൃͷٞ࿦͕ԁ׈ ʹਐΉ༷ʹͳΔɻͦͷ݁Ռɺ։ൃ଎౓ͷ޲্ͱɺ՝୊ղܾͷີͳٞ࿦͕Ͱ͖Δ༷ʹ ͳΔɻ ؔ਺"ͷૢ࡞ಛఆͷΞΧ΢ϯτʹݶఆ͍ͨ͠Μ͚ͩͲ
ΞΧ΢ϯτ੍ޚͳΒNPEJpFSఆ੍ٛ͠ޚ͢Δʁ NPEJpFSͰ੍ޚ͠Α͏ͱࢥͬͯͨ ͳΔ΄ͲɻΞΧ΢ϯτͷૢ࡞ΛڐՄ͢Δؔ਺΋ඞཁʹͳΔͳ ՝୊ղܾʹɺձ࿩ͷΩϟονϘʔϧΛඞཁͱ͢Δ ͲͷΞΧ΢ϯτʹڐՄ͍ͨ͠Μ͚ͩͬʁίϯτϥΫτΦʔφʔͷΈʁ Φʔφʔͱ,:$௨ͬͨΞΧ΢ϯτ͔ͳ ձ࿩ͷྫ

ڞ௨༻ޠɾڞ௨ೝࣝͷཱ֬ σβΠϯύλʔϯͷཧղʹΑΓɺ։ൃऀؒͷίϛϡχέʔγϣϯʹڞ௨ͷޠኮ ղܾ ՝୊໊ύλʔϯ໊ ͱڞ௨ͷೝࣝ ந৅֓೦ ཱ͕֬͞Εɺઃܭͱ։ൃͷٞ࿦͕ԁ׈ ʹਐΉ༷ʹͳΔɻͦͷ݁Ռɺ։ൃ଎౓ͷ޲্ͱɺ՝୊ղܾͷີͳٞ࿦͕Ͱ͖Δ༷ʹ ͳΔɻ ؔ਺"ͷૢ࡞ಛఆͷΞΧ΢ϯτʹݶఆ͍ͨ͠Μ͚ͩͲ
"DDFTT3FTUSJDUJPO1BUUFSO࢖͑͹ʁ ͓L ࣌ؒܦաͷஈ֊͝ͱʹॲཧ಺༰มߋ͍ͨ͠Μ͚ͩͲ ͦΕͳΒ4UBUF.BDIJOF1BUUFSOͱ͔ͰղܾͰ͖ͦ͏ʁ ͓Lɺͪΐͬͱࢼͯ͠ΈΔ ձ࿩ͷྫ Θ͔Γ΍͍͢ɻ

ίϯτϥΫτͷઃܭɾ։ൃྗͷ޲্ ༏Εͨ՝୊ղܾΞϓϩʔνΛֶͿ͜ͱͰɺૺ۰͢Δ՝୊Λந৅తʹଊ͑ΒΕΔΑ͏ʹͳΓ ίϯτϥΫτ։ൃʹ͓͚Δ՝୊෼ੳ՝୊ղܾྗ͕޲্͢Δɻ ઃܭɾ։ൃྗͷ޲্͕ݟࠐΊΔ ղܾࡦͷ࠶ར༻ ڞ௨༻ޠɾڞ௨ೝࣝͷཱ֬ ίϯτϥΫτͷઃܭɾ։ൃྗͷ޲্ ɾύλʔϯͰղܾͰ͖ͳ͍՝୊ʹूத͢Δɻ طग़ͷ՝୊͸ύλʔϯͰղܾ
ɾڞ௨༻ޠɾڞ௨ೝࣝͷཱ֬ʹΑΓɺີͳίϛϡχέʔγϣϯΛ࣮ݱɻ ɾ৽ͨͳϕετϓϥΫςΟεͷൃݟͳͲʹΑΓɺ՝୊ղܾͷԠ༻ɺൃలྗͷ޲্͕ݟࠐΊΔɻ

σβΠϯύλʔϯΛ׆༻͢Δͱ݁ՌͲ͏ͳΔͷ͔ʁ੔ཧ͢Δͱ සग़͢Δ՝୊ʹ຋࿔͞ΕΔਤ طग़ͷ՝୊͸ཱ֬͞ΕͨϕετϓϥΫςΟεΛ༻͍ͯղܾ ύλʔϯͰ͸ղܾͰ͖ͳ͍ຊ࣭తͳ՝୊ʹूத ڞ௨ݴޠɾೝࣝΛཱ֬͢Δ͜ͱͰ՝୊ղܾͷີͳٞ࿦͕Ͱ͖Δ σβΠϯύλʔϯͰଟ͘ͷϝϦοτΛڗड͢Δ͜ͱ͕Ͱ͖Δ ૺ۰͢Δ՝୊Λந৅తʹଊ͑ΒΕΔΑ͏ʹͳΓɺ՝୊෼ੳ՝୊ղܾೳྗ͕޲্͢Δ

σβΠϯύλʔϯΛ׆༻͢Δͱ݁ՌͲ͏ͳΔͷ͔ʁ੔ཧ͢Δͱ සग़͢Δ՝୊ʹ຋࿔͞ΕΔਤ طग़ͷ՝୊͸ཱ֬͞ΕͨϕετϓϥΫςΟεΛ༻͍ͯղܾ ύλʔϯͰ͸ղܾͰ͖ͳ͍ຊ࣭తͳ՝୊ʹूத ڞ௨ݴޠɾೝࣝΛཱ֬͢Δ͜ͱͰ՝୊ղܾͷີͳٞ࿦͕Ͱ͖Δ σβΠϯύλʔϯͰଟ͘ͷϝϦοτΛڗड͢Δ͜ͱ͕Ͱ͖Δ ૺ۰͢Δ՝୊Λந৅తʹଊ͑ΒΕΔΑ͏ʹͳΓɺ՝୊෼ੳ՝୊ղܾೳྗ͕޲্͢Δ ΑΓ۩ମతͳσβΠϯύλʔϯͱͦͷ෼ྨΛ঺հ͠·͢

σβΠϯύλʔϯͷ෼ྨ

σβΠϯύλʔϯͷ෼ྨ͸͍͔ͭ͘ఏҊ͞Ε͍ͯΔ͕ɺ ௐࠪɾਫ਼ࠪ͢Δͱେ͖͘ҎԼͷ෼ྨʹؼண͢Δ w"DUJPOBOE$POUSPM ίϯτϥΫτͷॲཧૢ࡞ͷ࢓૊ΈΛఏڙ͢Δάϧʔϓ w"VUIPSJ[BUJPO ίϯτϥΫτͷؔ਺ݺͼग़͠ͷೝՄ੍ޚΛఏڙ͢Δάϧʔϓ w-JGFDZDMF ίϯτϥΫτͷ࡞੒ͱഁյͷ੍ޚΛఏڙ͢Δάϧʔϓ w.BJOUFOBODF ίϯτϥΫτʹมߋՄೳੑΛఏڙ͢Δάϧʔϓ
w4FDVSJUZ ίϯτϥΫτͷؔ਺࣮ߦͷ҆શੑΛอূ͢ΔػೳΛఏڙ͢Δάϧʔϓ

ΧςΰϦʔ෼ྨͱσβΠϯύλʔϯ $BUFHPSZ 1BUUFSO "DUJPOBOE$POUSPM 1VMM1BZNFOU1BUUFSO  4UBUF.BDIJOF1BUUFSO  $PNNJUBOE3FWFBM1BUUFSO  0SBDMF1BUUFSO "VUIPSJ[BUJPO 0XOFSTIJQ1BUUFSO
"DDFTT3FTUSJDUJPO1BUUFSO -JGFDZDMF .PSUBM1BUUFSO "VUPNBUJD%FQSFDBUJPO1BUUFSO .BJOUFOBODF %BUB4FHSFHBUJPO1BUUFSO  4BUFMMJUF1BUUFSO  $POUSBDU3FHJTUFS1BUUFSO  $POUSBDU3FMBZ1BUUFSO 4FDVSJUZ $IFDLT&⒎FDUT*OUFSBDUJPO1BUUFSO  &NFSHFODZ4UPQ1BUUFSO  4QFFE#VNQ1BUUFSO  3BUFMJNJU1BUUFSO #BMBODF-JNJU1BUUFSO

$BUFHPSZ 1BUUFSO "DUJPOBOE$POUSPM 1VMM1BZNFOU1BUUFSO  4UBUF.BDIJOF1BUUFSO  $PNNJUBOE3FWFBM1BUUFSO  0SBDMF1BUUFSO "VUIPSJ[BUJPO 0XOFSTIJQ1BUUFSO "DDFTT3FTUSJDUJPO1BUUFSO
-JGFDZDMF .PSUBM1BUUFSO "VUPNBUJD%FQSFDBUJPO1BUUFSO .BJOUFOBODF %BUB4FHSFHBUJPO1BUUFSO  4BUFMMJUF1BUUFSO  $POUSBDU3FHJTUFS1BUUFSO  $POUSBDU3FMBZ1BUUFSO 4FDVSJUZ $IFDLT&⒎FDUT*OUFSBDUJPO1BUUFSO  &NFSHFODZ4UPQ1BUUFSO  4QFFE#VNQ1BUUFSO  3BUFMJNJU1BUUFSO #BMBODF-JNJU1BUUFSO ΧςΰϦʔ෼ྨͱσβΠϯύλʔϯ "DUJPOBOE$POUSPM $BUFHPSZ 1BUUFSO .BJOUFOBODF 4UBUF.BDIJOF1BUUFSO $PNNJUBOE3FWFBM1BUUFSO 4BUFMMJUF1BUUFSO ύλʔϯΛϐοΫΞοϓͯ͠঺հ͠·͢

σβΠϯύλʔϯͷ঺հ 4UBUF.BDIJOF1BUUFSO $PNNJUBOE3FWFBM1BUUFSO 4BUFMMJUF1BUUFSO

4UBUF.BDIJOF1BUUFSO ՝୊ ίϯτϥΫτͷঢ়ଶʹԠͯ͡ৼΔ෣͍Λมߋ͍ͨ͠ ղܾࡦ 4UBUF.BDIJOF1BUUFSOΛ༻͍Δ͜ͱͰঢ়ଶભҠΛఆٛ͠ɺৼΔ෣͍Λม͑Δ

4UBUF.BDIJOF1BUUFSO "DDFQUJOH%FQPTJUT 'SFF[JOH%FQPTJUT 3FMFBTJOH%FQPTJUT ૝ఆ͞ΕΔίϯτϥΫτͷঢ়ଶͱ࣌ؒܦա ঢ়ଶભҠʹԠͯؔ͡਺ͷৼΔ෣͍Λม͑Δ τʔΫϯͷσϙδοτ τʔΫϯͷϩοΫ  ૢ࡞ෆೳ τʔΫϯͷҾ͖ग़͠

4UBUF.BDIJOF1BUUFSO ঢ়ଶΛFOVNͰఆٛ OFYU4UBHFؔ਺Ͱঢ়ଶΛม͑Δ NPEJpFSͰঢ়ଶʹԠͨ͡ॲཧͷϋϯυϦϯάΛߦ͏ σϙδοτͷҾ͖ग़͠ॲཧ

$PNNJUBOE3FWFBM1BUUFSO ՝୊ ίϯτϥΫτʹه࿥͢ΔσʔλΛػີతʹѻ͍͍ͨ ղܾࡦ ίϛοτ͢Δ࣌఺Ͱ͸ίϛοτओ͚͕ͩσʔλ಺༰Λ஌͓ͬͯΓɺίϛοτσʔλΛެ։͢Δ࣌ ఺Ͱɺίϛοτσʔλͱެ։σʔλͰ੔߹ੑ͕औΕ͍ͯΔ͜ͱΛ໌Β͔ʹ͢Δ͜ͱͰɺίϛοτ σʔλ͕ෆਖ਼ͳ͘ެ։͞Εͨ͜ͱΛূ໌͢Δ

$PNNJUBOE3FWFBM1BUUFSO ίϛοτ࣌ʹσʔλͷൿಗੑΛ୲อ͠ɺ ϦϏʔϧͰ$PNNJUσʔλͱ੔߹ੑ͕อͨΕ͍ͯΔ͜ͱΛূ໌͠ɺެ։͢Δ $PNNJU 3FWFBM

$PNNJUBOE3FWFBM1BUUFSO σʔλߏ଄Λఆٛ DPNNJUؔ਺ Ҿ਺ͷ@DPNNJU͸CZUFܕʹͳ͓ͬͯΓɺ ίϛοτओҎ֎ݩͷσʔλΛ஌Δ͜ͱ͕Ͱ͖ͳ͍

$PNNJUBOE3FWFBM1BUUFSO SFWFBMؔ਺ @DIPJDFͱ@TFDSFUΛLFDDBLͰϋογϡԽɺ ฦΓ஋ͱ@DPNNJUΛൺֱ͠ɺDPNNJU஋ͱ੔߹ੑ ͕อ͍ͯΔ͔ݕূ

4BUFMMJUF1BUUFSO ՝୊ ίϯτϥΫτ͸σϓϩΠޙ͸มߋ͕Ͱ͖ͳ͘ͳΔ͕ɺ ৽͍͠ίϯτϥΫτΛσϓϩΠͯ͠ػೳΛมߋ͍ͨ͠ ղܾࡦ ಠཱͨ͠αςϥΠτίϯτϥΫτʹมߋ͞ΕΔՄೳੑͷߴ͍ػೳΛҕৡ͠ɺ ػೳΛར༻͢Δଆ͸ɺαςϥΠτίϯτϥΫτΛࢀর͢Δ͜ͱͰมߋՄೳͳػೳΛར༻͢Δ

4BUFMMJUF1BUUFSO #BTF$POUSBDU ϩδοΫίϯτϥΫτͷΞυϨεΛอ࣋ -PHJD" -PHJD# 4BUFMMJUF$POUSBDU ॲཧͷҕৡ มߋՄೳੑͷߴ͍ॲཧΛ֎෦ίϯτϥΫτʹ੾Γग़͠ɺ ॲཧΛ֎෦ίϯτϥΫτʹҕৡ͢Δ͜ͱͰมߋରԠ͢Δ ڞ௨ͷΠϯλʔϑΣʔε
ҟͳΔॲཧ಺༰

4BUFMMJUF1BUUFSO มߋ มߋՄೳੑͷߴ͍ॲཧΛαςϥΠτίϯτϥΫτʹఆٛ ϕʔείϯτϥΫτ͔ΒαςϥΠτίϯτϥΫτͷ DBMDVMBUF7BSJBCMFؔ਺Λ$BMM͢Δ

σβΠϯύλʔϯͷݚڀ

σβΠϯύλʔϯͷݚڀ ։ൃ͞ΕΔίϯτϥΫτͷଟ͘͸ଟֹͷࢿ࢈Λѻ͏΋ͷ͕ଟ͘ɺैདྷͷιϑτ΢ΣΞ։ൃΑΓ΋ ඼࣭͕ٻΊΒΕΔͨΊɺσβΠϯύλʔϯ͸ࠓޙΑΓॏཁͳݚڀςʔϚͱͳͬͯ͘Δɻ ւ֎Ͱ͸͍͔ͭ͘ݚڀ࿦จ͕ग़࢝Ί͍͕ͯɺ·ͩ·ͩະ։୓ͳঢ়گɻ ௐࠪΛ͍ͯͨ͠தͰɺ՝୊ͷ̍ͭͱͯ͋͠Δͷ͕ɺεϚʔτίϯτϥΫτ։ൃʹ͓͚Δzϕετ ϓϥΫςΟεzΛݴޠԽͯ͠ఆٛͰ͖͍ͯͳ͍ͱ͍͏՝୊ɻ ΦϒδΣΫτࢦ޲։ൃͳͲͰ͸ιϑτ΢ΣΞͷ඼࣭Λݪཧݪଇ 40-*%ݪଇͳͲ ʹଇͬͯධՁ Ͱ͖͍ͯΔ͕ɺεϚʔτίϯτϥΫτ։ൃʹ͓͍ͯ͸͸໌֬ʹzྑ͍ίϯτϥΫτίʔυzΛݴޠ
ఆٛͰ͖͍ͯͳ͍ɻ ͜ͷ՝୊͸ࠓޙɺࣄྫ͕૿͑ΔʹͭΕͯݚڀ΋ਐΈ໌֬ʹͳ͍ͬͯ͘ͱࢥΘΕΔɻ σβΠϯύλʔϯ͸ࠓޙॏཁͳݚڀςʔϚ lϕετϓϥΫςΟεzͷݴޠԽ͕ඞཁ

·ͱΊ

·ͱΊ σβΠϯύλʔϯͱ͸Կͳͷ͔͕Θ͔͍ͬͯΔ σβΠϯύλʔϯͱ͸සग़͢Δ՝୊ղܾͷϕετϓϥΫςΟε  ɹͭͷϝϦοτ ղܾࡦͷ࠶ར༻ڞ௨༻ޠɾڞ௨ೝࣝͷཱ֬։ൃྗͷ޲্ εϚʔτίϯτϥΫτ։ൃʹ͓͚ΔσβΠϯύλʔϯͷશମ૾Λཧղ͍ͯ͠Δ ͭͷάϧʔϓͷύλʔϯ  ࣮ࡍͷ։ൃʹσβΠϯύλʔϯ׆༻͍͚ͯ͠Δঢ়ଶʹͳ͍ͬͯΔ લఏ஌ࣝͭͷύλʔϯྫͱαϯϓϧίʔυࢀߟจݙ
'JOJTI

ɾ4NBSU$POUSBDUT4FDVSJUZ1BUUFSOT  JOUIF&UIFSFVN&DPTZTUFNBOE4PMJEJUZ ɾ%FTJHO1BUUFSOTGPS4NBSU$POUSBDUT  JOUIF&UIFSFVN&DPTZTUFN ɾ*EFOUJpDBUJPOPG1SPHSBNNJOH1BUUFSOTJO4PMJEJUZ ɾ4PMJEJUZ4NBSU$POUSBDUT%FTJHO1BUUFSOT ɾ-FBSOJOH4PMJEJUZ1BSU$PNNJU3FWFBM7PUJOH ɾ1SPYZ-JCSBSJFTJO4PMJEJUZ ɾZBNBSL[TPMJEJUZEFTJHOQBUUFSOT ࢀߟࢿྉ

͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ

Smart Contract Design Pattern

Smart Contract Design Pattern

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