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Hi-Ether Meetup Block#0 LTトークン運用の三要素(発行・移転・焼却)
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Shu Kobuchi
February 02, 2018
Programming
0
3.3k
Hi-Ether Meetup Block#0 LTトークン運用の三要素(発行・移転・焼却)
2018年2月2日Hi-Ether Meetup Block#0での「トークン運用の三要素(発行・移転・焼却)」のLT資料です。
Shu Kobuchi
February 02, 2018
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Transcript
)J&UIFS.FFUVQ#MPDL-5 τʔΫϯӡ༻ͷࡾཁૉ ʢൃߦɾҠసɾফ٫ʣ খᔹपʢ4IV,PCVDIJʣ
ࣗݾհ w খᔹप 4IV,PCVDIJ w ྸɿY'ࡀʢࠓͰYࡀʂʂʣ w ࠷ऴֶྺɿϒϩοΫνΣʔϯେֶߍΤϯδχΞ ϒϩϯζίʔε
̐ظੜ w ΩϡʔϒγεςϜͷاը෦ ɹɾϒϩοΫνΣʔϯਪਐڠձ #$$$ ձһ ɹɹɹԾ௨՟;&/ࣾձ࣮ݧʹࢀՃ ɹɾϒϩοΫνΣʔϯϋϒίʔϙϨʔτձһ ɹɾϏϤϯυϒϩοΫνΣʔϯਖ਼ձһ
ൃߦͱҠస w ൃߦͱҠసඞਢػೳ w 0QFO;FQQFMJOͷ#BTJD5PLFOTPMΛࠓճͷखຊʹ IUUQTHJUIVCDPN0QFO;FQQFMJO[FQQFMJOTPMJEJUZ CMPCNBTUFSDPOUSBDUTUPLFO&3$ #BTJD5PLFOTPM
ফ٫ʢম٫ʣ w ফ٫͕ඞཁͳ͜ͱ͋Δ w 0QFO;FQQFMJOͷ#VSOBCMF5PLFOTPMΛࠓճͷखຊʹ #VSOBCMF5PLFOΛ#BTJD5PLFOʹΫϥεܧঝͤ͞Δ IUUQTHJUIVCDPN0QFO;FQQFMJO[FQQFMJOTPMJEJUZ CMPCNBTUFSDPOUSBDUTUPLFO&3$ #VSOBCMF5PLFOTPM
ίʔυྫ pragma solidity ^0.4.18; library SafeMath { … } contract
BasicToken { … } contract BurnableToken is BasicToken { event Burn(address indexed burner, uint256 value); function burn(uint256 _value) public { require(_value <= balances[msg.sender]); address burner = msg.sender; balances[burner] = balances[burner].sub(_value); totalSupply = totalSupply.sub(_value); Burn(burner, _value); } }
#VSOલ
#VSOޙ
ফ٫Λ͢Δҙຯ w ᶃൃߦऀʹ͖ͬͯͨ࠴݊Λ༻ࡁΈʹ͢Δ w ᶄଞϓϥοτϑΥʔϜͷՁͷҠస ɹ୯ํʢෆՄٯʣͷ߹ʮ1SPPGPG#VSOʯ
ᶃ࠴ݖΛ༻ࡁΈʹ͢ Δ
ωΠςΟϒ௨՟ʹൃߦओମ ͕ͳ͍ w &5)#5$ͳͲωΠςΟϒ௨՟ʹൃߦओମ͕ͳ͍ w ࠴ݖ࠴ؔΛఆٛͰ͖ͳ͍ ϚΠφʔใुͰ৽نੜ ૹۚऀͷిࢠॺ໊͕ͳ͍ YFDBCF BGCDCG
YBE FFDG 59 3FXBSE ૹۚΞΧϯτͷిࢠॺ໊ΛؚΉ YCDEE CEDFB #MPDL
ಠࣗτʔΫϯͷൃߦओମ w ಠࣗτʔΫϯʹൃߦओମ͕ଘࡏ͢Δ w ࠴ݖ࠴ؔΛఆٛͰ͖Δ 59 ൃߦ࣌ʹൃߦΞΧϯτͷ ిࢠॺ໊ΛؚΉ Y⒎CBFG CGFFF
CEEF $SFBUF $POUSBDU
ಠࣗτʔΫϯ࠴݊ w ࢠڙͷ͓ख͍݊ɾݞୟ͖݊࿑ಇ͢Δ͜ͱΛଋ͍ͯ͠ ͯɺࣗʹෛͷՁ w اۀϙΠϯτෛ࠴ܭ্ w ຊۜߦ݊ຊۜߦͰෛ࠴ܭ্ʢଞࠃͷதԝۜߦෛ ࠴ܭ্͕Ұൠతʣ
࠴͕͖݊ͬͯͨΒ#VSO w ൃߦऀͷखݩʹ͖ͬͯͨΒ#VSO w ࢴͰͷྫʣ ίϯαʔτνέοτͷ݊ΛΓ͢ ྻंͷݕࡳͰූʹԡҹɾύϯν݀ खͷফҹ
εϚʔτίϯτϥΫτ ͰͷΠϝʔδ ᶄ&5)ૹۚ τʔΫϯൃߦऀ ʢαʔϏεఏڙऀʣ ᶃίϯτϥΫτσϓϩΠ ʢτʔΫϯఆٛʣ ᶄτʔΫϯൃߦ ᶄτʔΫϯૹ৴ ᶅτʔΫϯૹ৴
ᶅαʔϏεఏڙ ᶅτʔΫϯফ٫
ᶄଞϓϥοτϑΥʔϜ ͷՁҠస
ҟͳΔϓϥοτϑΥʔϜؒͰ ͷՁͷҠస w #$$$Ծ௨՟ʮ;FOʯࣾձ࣮ݧୈ̍ϑΣʔζϨϙʔτ IUUQCDDDHMPCBMKBBSUJDMFTIUNM
1SPPGPG#VSOʢ୯ํʣ w $PVOUFS1BSUZ 9$1 ൃߦͰ1SPPGPG#VSOͳͲ ˞9$1ΦϯνΣʔϯʹΔ ΦϯνΣʔϯ ʢϒϩοΫνΣʔϯʣ τʔΫϯ ϖά
τʔΫϯൃੜ ফ٫ 1SPPGPG#VSO ΦϑνΣʔϯͳͲ
ΦϑνΣʔϯͰͷ߆ଋ w ϥΠτχϯάωοτϫʔΫΦϯνΣʔϯ্ͰίΠϯΛϩ οΫʢ߆ଋʣ w ํϖάαΠυνΣʔϯΦϯνΣʔϯͰίΠϯΛϩο Ϋ ΦϯνΣʔϯ ʢϒϩοΫνΣʔϯʣ τʔΫϯ
ϖά τʔΫϯൃੜ ߆ଋ ߆ଋղআ ফ٫ ϖά ΦϑνΣʔϯ
͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ w !TIV@LPC w TIVLPCVDIJ w ۚ
04$౦ژ!໌େֶ w ຊ҉߸௨՟Ϣʔβձग़లʂ w ηϛφʔʮ#JUDPJO$PSFೖʯɹ୲ɿখᔹ w IUUQTXXXPTQOKQPTDTQSJOHNPEVMFTFHVJEFFWFOUQIQ FJE