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ୈ1ճ BBc-1ͱEthereumೖ
࣮ફʂεϚʔτίϯτϥΫτϓϩάϥϛϯά
ϒϩοΫνΣʔϯϋϒ CSO / ܚጯٛक़େֶ SFC ݚڀॴ ্੮ॴһ
੪౻ ݡ࣐
[email protected]
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͜ͷεϥΠυ
https://speakerdeck.com/ks91
ʹஔ͔Ε·͢
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؆୯ͳࣗݾհ
੪౻ ݡ࣐ (͍͞ͱ͏ ͚Μ͡)
ܚጯٛक़େֶ SFC ݚڀॴ ্੮ॴһɾڥใֶ෦ ߨࢣ (ඇৗۈ)
גࣜձࣾϒϩοΫνΣʔϯϋϒ CSO (Chief Science Officer)
Ұൠࣾஂ๏ਓϏϤϯυϒϩοΫνΣʔϯ දཧࣄ
Ұൠࣾஂ๏ਓΞΧσϛʔΩϟϯϓ දཧࣄ
ܦྺ
1993 ɺίʔωϧେֶΑΓֶम࢜߸औಘ (ίϯϐϡʔλαΠΤϯε)
2006 ɺܚጯٛक़େֶΑΓσδλϧ௨՟ͷݚڀͰത࢜߸औಘ (ࡦɾϝσΟΞ)
ܚጯٛक़େֶ େֶӃ ࡦɾϝσΟΞݚڀՊ SFC ݚڀॴʹͯ 18 Ҏ্ʹΘͨΓ
P2P (Peer-to-Peer) ͓Αͼσδλϧ௨՟ͷݚڀʹैࣄ
2011 ՆΑΓౡͷ͜ͲͨͪͷͨΊͷʮΞΧσϛʔΩϟϯϓʯΛؒΒͱ։࠵
ࡢՆ SFC ʹͯ ΞΧσϛʔΩϟϯϓ 2018 ՆʮΦοέʔάʔάϧɺ॓ͬͱ͍ͯʂʯΛ࣮ࢪ
ࡢౙɺΞΧσϛʔΩϟϯϓ 2019 ౙʮԵঁͷͨΊͷΦʔτϝʔγϣϯ ∼ ΧϫΠΠࣗಈԽͰ͖ΔʂʯΛ࣮ࢪ
→ ࢲͷ಄ͷதͰͭͳ͕͍ͬͯ·͢ (͜Ε͔ΒͷࣾձͷσβΠϯ͜ͲͨͪͱҰॹʹ)
࣮ફʂεϚʔτίϯτϥΫτϓϩάϥϛϯά — ୈ 1 ճ BBc-1 ͱ Ethereum ೖ — 2019-06-05 – p.3/34
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ࠓճͷςʔϚ
ୈ̍ճͱͳΔຊηϛφʔͰɺ
ʮϒϩοΫνΣʔϯͰͰ͖Δͱ͞Ε͍ͯΔ͜ͱΛɺຊʹʯͷ
Ωϟ
ονϑϨʔζͰ։ൃ͕ਐΊΒΕ͍ͯΔ BBc-1 (Beyond Blockchain One) ͱɺ
εϚʔτίϯτϥΫτͷج൫ͱͯ͠ΒΕΔ Ethereum Λ
͓खݩͷڥʹΠϯετʔϧͭͭ͠ɺ
ͦΕΒͷج൫ͷ֓೦ʹֶ͍ͭͯͼ·͢
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ࠓճͷߏ
1. Ethereum ֓
2. Ethereum ಋೖ
3. εϚʔτίϯτϥΫτͱ Ethereum
4. ॓ͷग़
5. BBc-1 ֓ɺಋೖ͓Αͼςετ
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1. Ethereum ֓
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ϒϩοΫνΣʔϯԿΛఏڙ͢Δٕज़͔
1) ༰ଘࡏ୭ʹ൱ఆͰ͖ͳ͍Α͏ʹهΛอଘɾҡ࣋͢Δ
2) ͦͷ͔֬͞Λ୭Ͱ֬ೝͰ͖Δ (= ͔֬ͩͱূ໌Ͱ͖Δ)
3) Ҏ্ͷ͜ͱΛ୭ʹࢭΊͤ͞ͳ͍
ʮ୭ʹʯ
ʮ୭Ͱʯͱఆٛ͞ΕͨεςʔΫϗϧμʔͨͪ
⇒ ͔ۭ͋ͨதʹهΛݻఆͰ͖Δ
ϓϩάϥϜͱσʔλͦΜͳ෩ʹͯ͠ݻఆͰ͖Δ (= εϚʔτίϯτϥΫτ)
⇒ ೋॏͷ՝͕͋Δ
ͦͷ͜ͱຊʹ࣮ݱͰ͖͍ͯΔͷ͔ʁ
ͦͷ͜ͱ͕࣮ݱͰ͖ͨΒऔΓࠫଡ͞Ε͍ͯΔԠ༻͕Մೳͳͷ͔ʁ
ཧత࣮ମͱσδλϧͳهͱͷؒͷ࣮֬ͳඥ͚ͷ
· αϓϥΠνΣʔϯʹ͓͍ͯɺՃΛܦ࣮ͯ֬ʹՄೳ͔
࣮࣌ؒੑɾن֦େ/ॖখੑɾదԠੑɾ࣋ଓੑͷ՝ (dependable ͳͷʹͳΓಘΔͷ͔)
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ϒϩοΫνΣʔϯ/DLT ͷݱঢ়
ϒϩοΫνΣʔϯ (ओͱͯ͠ʮۭதʯάϩʔόϧ)
Bitcoin (βɾϒϩοΫνΣʔϯ)
Open Assets Protocol (OAP)
(ϏοτίΠϯϒϩοΫνΣʔϯ্ʹҙͷྔΛఆٛͯ͠ҠసͰ͖Δ)
Ethereum (Dapps (ۭதͰಈ࡞͢ΔΞϓϦ) ͷͨΊͷج൫) (ଟʹ࣮ݧγεςϜ)
EOS (↓ ͬͪ͜ํͷਐԽʁ)
ͦͷଞͷாٕज़ (DLT) (ओͱͯ͠ʮۭதʯϩʔΧϧ)
Hyperledger (Linux Foundation)
Fabric (IBM/DAH), Sawtooth (Intel), Iroha (ιϥϛπ)
ͳͲͷ։ൃ͕ਐߦத
Corda (R3),
. . .
, BBc-1 (զʑ)
ຊʹهͷ༰ଘࡏ୭ʹ൱ఆͰ͖ͳ͍ͷ͔ʁ
ຊʹهͷ ͔֬͞Λ୭Ͱ֬ೝͰ͖Δ ͱݴ͑Δͷ͔ʁ
࣮ફʂεϚʔτίϯτϥΫτϓϩάϥϛϯά — ୈ 1 ճ BBc-1 ͱ Ethereum ೖ — 2019-06-05 – p.8/34
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Ethereum ͱʁ
Vitalik Buterin, “Ethereum White Paper: A NEXT GENERATION SMART
CONTRACT & DECENTRALIZED APPLICATION PLATFORM”
ϒϩοΫνΣʔϯٕज़ΛԠ༻
ฏۉϒϩοΫִؒ 15 ඵ
ͦ͜ʹϓϩάϥϛϯάݴޠΛࡌͤΔ
νϡʔϦϯάશ
Dapps (தԝΞϓϦ/ۭதͰಈ࡞͢ΔΞϓϦ/தԝΛࣗಈԽ͢ΔΞϓϦ) ͷͨΊͷج൫
ݱࡏͷۚ༥ɾ՟ฎܦࡁγεςϜΛ࣌Εʹ͠Α͏ͱ͢Δҙਤ͕ݟ͑Δ
εϚʔτίϯτϥΫτͱͦͦͦ͏͍͏ͷ
࣮ફʂεϚʔτίϯτϥΫτϓϩάϥϛϯά — ୈ 1 ճ BBc-1 ͱ Ethereum ೖ — 2019-06-05 – p.9/34
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2. Ethereum ಋೖ
ڭࡐ࣍ͷڥͰςετ͍ͯ͠·͢
macOS (Mojave 10.14.5) + Homebrew
Linux (Ubuntu 16.04)
Windows 10 + Windows Subsystem for Linux (Ubuntu 16.04 ͱͯ͠ςετ)
Ethereum ڥͱͯ͠ solidity ͓Αͼ brownie Λ༻͠·͢
࣮ફʂεϚʔτίϯτϥΫτϓϩάϥϛϯά — ୈ 1 ճ BBc-1 ͱ Ethereum ೖ — 2019-06-05 – p.10/34
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Solidity ͷΠϯετʔϧ
Ethereum ͷεϚʔτίϯτϥΫτͷ։ൃݴޠͰ͢
Πϯετʔϧํ๏
http://solidity.readthedocs.io/en/latest/installing-solidity.html
Linux (on Windows) Ͱ “sudo apt”, macOS Ͱ “brew” ͰͷΠϯετʔϧͰ͢
solc 0.5.9 ͕Πϯετʔϧ͞Ε·͢ (6/5 ݱࡏ)
࣮ߦͰ͖Δ͜ͱΛ֬ೝ͠·͢
$ solc --version
Πϯετʔϧ͞ΕͨόʔδϣϯΛ֬ೝͯ͠Έ·͠ΐ͏
ࠓճɺ࣮ࡍʹ༻͢ΔίϯύΠϥ brownie ͱҰॹʹΠϯετʔϧ͞ΕΔ py-solc-x Ͱ͕͢ɺ
solc ͕ґଘ͢Δڥ (dependencies) ͕ඞཁͱͳΓ·͢ (దͳ solc ίϯύΠϥΛ py-solc-x ͕Πϯετʔϧ͠·͢)
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Python3 ͷΠϯετʔϧ
macOS ͷ߹
$ brew install python3
Linux ͷ߹
$ sudo add-apt-repository ppa:deadsnakes/ppa
$ sudo apt update
$ sudo apt install python3.7 python3.7-dev python3.7-venv python3.7-tk
16.10 Ҏ߱ͷ൛Ͱ python3(.7) Λͦͷ·· apt ͰΠϯετʔϧͰ͖·͢ɻ
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macOS : ͠Ҏ߱ͷεςοϓͰ
. . .
macOS ʹ wget ͕ͳ͍ͱݴΘΕͨ߹ɺbrew ͰΠϯετʔϧ͍ͯͩ͘͠͞
·͋ɺແ͚ΕࠓೖΕͪΌ͑Α͍Ͱ͢ΑͶ
͞Βʹ
dyld: Library not loaded: /usr/local/opt/gettext/lib/libintl.8.dylib
ͷΑ͏ʹͳΔ߹ɺҎԼΛࢼͯ͠Έ͍ͯͩ͘͞
$ brew uninstall --force gettext
$ brew install gettext
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Python Ծڥ (venv)
macOS ͷ߹ ‘python3.7’ Λ ‘python3’ ͱಡΈସ͍͑ͯͩ͘͞
$ python3.7 -m venv bbc1env
$ source bbc1env/bin/activate
(bbc1env) $ pip install -U pip
bbc1env (ࠓޙ BBc-1 ΛΠϯετʔϧ͢ΔͨΊ) ͱ͍͏ԾڥΛͭ͘Γ·ͨ͠
௨ৗͷ࡞ۀԾڥͰߦ͍·͢
Ծڥ͔Βग़Δ߹࣍ͷίϚϯυΛ༻͍·͢ (ࠓग़·ͤΜ)
(bbc1env) $ deactivate
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Ganache CLI ͷΠϯετʔϧ
Ethereum ͷ RPC ΫϥΠΞϯτͰ͋ΓςετڥͰ͢
·ͣ npm ΛΠϯετʔϧ͠·͢ (͓͍Ͱͳ͍߹)
macOS ͷ߹
https://qiita.com/PolarBear/items/62c0416492810b7ecf7c Λ͝ࢀߟʹ
Linux ͷ߹
https://qiita.com/seibe/items/36cef7df85fe2cefa3ea Λ͝ࢀߟʹ
ͦͯ͠ npm Λͬͯ Ganache CLI ΛΠϯετʔϧ͠·͢
$ sudo npm install -g ganache-cli
࣮ફʂεϚʔτίϯτϥΫτϓϩάϥϛϯά — ୈ 1 ճ BBc-1 ͱ Ethereum ೖ — 2019-06-05 – p.15/34
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Brownie ͷΠϯετʔϧ
Python ʹΑΔ Ethereum ͷ։ൃɾςετڥͰ͢
https://eth-brownie.readthedocs.io
Brownie ΛΠϯετʔϧ͠·͢
$ pip install eth-brownie
version 1.0.0b7 ͕Πϯετʔϧ͞Ε·͢ (6/5 ݱࡏ)
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ϓϩδΣΫτͷॳظԽ
৽͍͠ϓϩδΣΫτΛͭ͘Γ·͢
$ brownie init
࣮ߦॴΛجͱͯ͠σΟϨΫτϦߏ͕࡞ΒΕ·͢
Ͱ͕͢ࠓճطଘͷςϯϓϨʔτΛͬͯΈ·͠ΐ͏ (؆қͳ ERC-20 ࣮Ͱ͢)
$ brownie bake token
$ cd token
ίϯύΠϧ͠·͢ (ίϯτϥΫτͷίʔυΛͪΐͬ͜ͱݟͯΈ·͠ΐ͏)
$ brownie compile
ςετ͠·͢ (ςετίʔυΛͪΐͬ͜ͱݟͯΈ·͠ΐ͏)
$ brownie test
࣮ફʂεϚʔτίϯτϥΫτϓϩάϥϛϯά — ୈ 1 ճ BBc-1 ͱ Ethereum ೖ — 2019-06-05 – p.17/34
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ίϯιʔϧΛͬͯΈ·͠ΐ͏
Brownie ͷίϯιʔϧΛͬͯɺςετڥͷঢ়ଶΛݟͯΈ·͢
$ brownie console
Ҏ߱ɺPython ΠϯλϓϦλͰૢ࡞Ͱ͖·͢
>>> len(accounts)
10
>>> accounts[0].balance()
100000000000000000000
>>> quit()
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3. εϚʔτίϯτϥΫτͱ Ethereum
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ڱ͍ҙຯͰޠΔ
εϚʔτίϯτϥΫτͱ
σδλϧʹදݱ͞ΕΔࢿ࢈Λ༧ΊఆΊΒΕͨϧʔϧʹैͬͯ
ࣗಈతʹҠసͤ͞ΔΈ
ޠײͱ߹Θͳ͍
͔͠͠ɺ͜ͷڱٛͷҙຯʹҙຯ͕͋Δ
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͍ҙຯͰޠΔ
εϚʔτίϯτϥΫτͱ
ܖΛػցͰ࣮͢ΔΈ
·ͨɺͦͷΑ͏ʹ࣮ͯ͠͞Εͨܖ
ݪॳతʹࣗಈൢചػͳͲεϚʔτίϯτϥΫτʹͨΔ
ࣗಈൢചػ
. . .
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ݱ࣮ vs. ϒϩοΫνΣʔϯ
ࢥߟ࣮ݧ
ϏοτίΠϯͰࢧ͏ͱɺ্ۭΛඈͿυϩʔϯ͕ӡΜͰ͖ͨ؈δϡʔεΛ
མͱͯ͘͠ΕΔͱ͍͏αʔϏεΛ࡞Δͱ͢Δ
υϩʔϯ͍ͭ؈δϡʔεΛམͱͤΑ͍ͷ͔ʁ
࣮࣌ؒͰਐߦ͢Δݱ࣮ͱɺϒϩοΫνΣʔϯͷಈ࡞͔͚Ε͍ͯΔ
͜ͷυϩʔϯʹΑΔࣗൢػͷྫखͳ͚ͩ
ී௨ͷࣗൢػͰ·ͬͨ͘ಉ͜͡ͱ͕ݴ͑Δ
࣮ફʂεϚʔτίϯτϥΫτϓϩάϥϛϯά — ୈ 1 ճ BBc-1 ͱ Ethereum ೖ — 2019-06-05 – p.22/34
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ϒϩοΫνΣʔϯͱঢ়ଶભҠ
ϒϩοΫνΣʔϯ = ঢ়ଶϚγϯͷ run
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༻ޠମܥ
Ether
Ethereum ʹ͓͚Δ௨՟
֎෦ΞΫλʔ
σδλϧॺ໊Ͱ͖Δ࣮ࡏͰɺΞΧϯτΛͭ
EOA : Externally-Owned Account
ࣗΦϒδΣΫτ
γεςϜͰࣗಈ࡞͠ɺΞΧϯτΛͭ
ΞΧϯτ
Ether ߴΛͪɺετϨʔδ EVM ίʔυΛͯΔ
EVM ίʔυ
εϚʔτίϯτϥΫτͷϓϩάϥϜ
࣮ફʂεϚʔτίϯτϥΫτϓϩάϥϛϯά — ୈ 1 ճ BBc-1 ͱ Ethereum ೖ — 2019-06-05 – p.24/34
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EVM : Ethereum Virtual Machine
ࣗΦϒδΣΫτ͕ϝοηʔδΛड͚Δͱىಈ͠ɺίϯτϥΫτΛ࣮ߦɺঢ়ଶΛมԽͤ͞Δ
࣮ߦεςοϓຖʹ Gas ͷڙڅ͕ඞཁ
࣮ફʂεϚʔτίϯτϥΫτϓϩάϥϛϯά — ୈ 1 ճ BBc-1 ͱ Ethereum ೖ — 2019-06-05 – p.25/34
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ϓϩάϥϛϯάݴޠ
EVM ͕ղऍ͢ΔͷόΠτίʔυ
ͦͷଞʹߴڃݴޠͷίϯύΠϥΛ༻ҙ
ߴڃݴޠ : ਓ͕ؒಡΈॻ͖Ͱ͖Δݴޠ
ྫ :
Solidity — JavaScript ʹࣅͨݴޠ
ݱࡏͷϓϥΠϚϦݴޠ
LLL — Lisp ʹࣅͨݴޠ
࣮ફʂεϚʔτίϯτϥΫτϓϩάϥϛϯά — ୈ 1 ճ BBc-1 ͱ Ethereum ೖ — 2019-06-05 – p.26/34
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Solidity αϯϓϧίʔυ (͜Ε͕ߴڃݴޠͩʂ)
pragma solidity ˆ0.4.24;
contract IndivisibleAsset { /* ׂͰ͖ͳ͍ࢿ࢈ͷॴ༗ݖͷҠసΛ࣮ݱ */
string public _name;
string public _symbol;
uint256 public _quantity;
address public _owner;
constructor (string name, string symbol, uint256 quantity) public {
_name = name;
_symbol = symbol;
_quantity = quantity;
_owner = msg.sender;
}
function transfer(address to) external returns (bool) {
require(_owner == msg.sender);
_owner = to;
return true;
}
}
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ಛͱ՝
ಛ
ϒϩοΫͷݕূͷաఔͰϓϩάϥϜΛ࣮ߦ͠ɺ
ͦͷ݁ՌΛঢ়ଶʹөͤ͞Δ
ෳͷݕূऀ͕ʹ࣮ߦ
ϒϩοΫνΣʔϯͷதʹด͡Δ
Ethereum ͷମܥͷதͰ߹త
՝
ϓϩάϥϜͷத͔Βೖग़ྗίϚϯυΛग़ͤͳ͍
֎෦ΞΫλʔҎ֎ͷ֎քͷӨڹΛड͚ͨΓɺ
֎քʹӨڹΛٴ΅͢͜ͱ͕Ͱ͖ͳ͍
࣮ફʂεϚʔτίϯτϥΫτϓϩάϥϛϯά — ୈ 1 ճ BBc-1 ͱ Ethereum ೖ — 2019-06-05 – p.28/34
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4. ॓ͷग़
࣍ճ·Ͱʹ Ethereum ͷ ropsten ςετωοτΛར༻Ͱ͖ΔΑ͏ʹ͠·͢
࣮ફʂεϚʔτίϯτϥΫτϓϩάϥϛϯά — ୈ 1 ճ BBc-1 ͱ Ethereum ೖ — 2019-06-05 – p.29/34
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infura.io ΞΧϯτऔಘͱ Brownie ͷઃఆ
https://infura.io ʹ SIGN UP ͯ͠ɺPROJECT ID Λऔಘ͍ͯͩ͘͠͞
infura Ethereum ϑϧϊʔυͷػೳΛ API Ͱఏڙ͢ΔαʔϏεͰ͢
։ൃ࣮ݧʹΑ͍Ͱ͕͢ɺϓϩμΫτʹ͑ͳ͍ͱߟ͓͖͑ͯ·͠ΐ͏
infura.io ͷࣗ͝ͷϓϩδΣΫτϖʔδ͔Βɺ
ROPSTEN ༻ͷ ENDPOINT Λίϐʔ͍ͯͩ͘͠͞
͓खݩͷ Brownie ͷϓϩδΣΫτͷ “brownie-config.json” Λฤू͠·͢
“networks” ͷதͷ “ropsten” ͷ “host” URL ͷ “ropsten.∼” ҎԼΛɺ
ίϐʔͨ͠ ENDPOINT Ͱ্ॻ͖͍ͯͩ͘͠͞
࣮ફʂεϚʔτίϯτϥΫτϓϩάϥϛϯά — ୈ 1 ճ BBc-1 ͱ Ethereum ೖ — 2019-06-05 – p.30/34
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ropsten ΞΧϯτͷ࡞ͱ ETH ͷऔಘ
brownie console Λ༻͍ͯ ropsten ༻ͷΞΧϯτΛ࡞͠·͢
>>> network.disconnect()
>>> network.connect(’ropsten’)
>>> len(accounts)
0
>>> accounts.add()
>>> accounts[0].private_key
͜͜ʹΞΧϯτͷൿີݤͷ 16 ਐจࣈྻ͕දࣔ͞Ε·͢
>>> quit()
ॏཁʂΞΧϯτͱൿີݤΛͦΕͧΕίϐʔͯ͠อ͠·͠ΐ͏ʂ
Ropsten Ethereum Faucet ͔Β 1ETH Λऔಘ͍ͯͩ͘͠͞
https://faucet.ropsten.be ʹΞΫηε͠ɺ
ΞΧϯτ (ൿີݤͰ͋Γ·ͤΜ) Λೖྗ͠·͢
͏·͍͔͘ͳ͍߹ https://metamask.io/Λར༻͢Δํ๏͋Γ·͢ͷͰɺௐͯࢼͯ͠Έ͍ͯͩ͘͞
࣮ફʂεϚʔτίϯτϥΫτϓϩάϥϛϯά — ୈ 1 ճ BBc-1 ͱ Ethereum ೖ — 2019-06-05 – p.31/34
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ropsten ETH ߴͷ֬ೝ
brownie console Λ༻͍ͯ ropsten ༻ͷ ETH ߴΛ֬ೝ͠·͢
>>> network.disconnect()
>>> network.connect(’ropsten’)
>>> len(accounts)
0
>>> accounts.add(͜͜ʹൿີݤͷ 16 ਐจࣈྻΛϖʔετ͍ͯͩ͘͠͞)
>>> accounts[0].balace()
͜͜ʹΞΧϯτͷ ETH ߴ͕දࣔ͞Ε·͢
>>> quit()
Ҏ্Λ࣍ճ·Ͱʹ͓ئ͍͍ͨ͠·͢ʂ
࣮ફʂεϚʔτίϯτϥΫτϓϩάϥϛϯά — ୈ 1 ճ BBc-1 ͱ Ethereum ೖ — 2019-06-05 – p.32/34
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5. BBc-1 ֓ɺಋೖ͓Αͼςετ
ҎԼͷϋϯζΦϯʹԊͬͯͬͯΈ·͢
https://speakerdeck.com/beyondblockchain/bbc-1-hands-on-installation-and-file-content-proof
࣮ફʂεϚʔτίϯτϥΫτϓϩάϥϛϯά — ୈ 1 ճ BBc-1 ͱ Ethereum ೖ — 2019-06-05 – p.33/34
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࣍ճͷ༧ࠂ
ʮୈ2ճ BBc-1 ͱ Ethereum ԋशIʯ
࣮श՝: ূ໌ॻͷൃߦͱݕূͷγεςϜͮ͘Γ
࣮ફʂεϚʔτίϯτϥΫτϓϩάϥϛϯά — ୈ 1 ճ BBc-1 ͱ Ethereum ೖ — 2019-06-05 – p.34/34