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Tendermint
1.
~ scalable blockchain
consensus engine ~ @keita0q
2.
⢠äžæå¥å€ª ⢠twitter
@keita0q ⢠ã¡ã«ã〠/ åæ£å°åž³éçºéš
3.
Scalability Problem
4.
Scalability Problem ãããã¯ãã§ãŒã³ãå®çšåããããã«ã¯ ã¹ã±ãŒã©ããªãã£åé¡ã解決ããå¿ èŠããã transaction info Block Hash ãããã¯ãŒã¯ãžã®åå è ãå¢ããã»ã© ãã©ã³ã¶ã¯ã·ã§ã³ã®æ€èšŒãåæ圢æã«æéãããã transaction info Block Hash transaction info Block Hash
5.
Solutions Layer2 SideChains Plasma, Cosmos State Channels Raiden,
Lightning Layer1 Sharding Ethereum Sharding, Ziliqa Consensusã«ãã解決 Casper, Tendermint, âŠ
6.
solutions for scalability
problem Layer2 SideChains Plasma, Cosmos State Channels Raiden, Lightning Layer1 Sharding Ethereum Sharding, Ziliqa Consensusã«ãã解決 Casper, Tendermint, ⊠ãšã«ããã¡ã€ã³ãã§ãŒã³ã§ ããããšæžãããïŒ TxåŠçã¹ããŒããããããïŒ
7.
Tendermint
8.
Tendermint ãããã¯ãã§ãŒã³ã«ãããã³ã³ã»ã³ãµã¹ã¢ã«ãŽãªãºã ãšP2Pãããã¯ãŒã¯ ã容æãã€ã»ãã¥ã¢ã«æ§ç¯ããããšãã§ãããœãããŠã§ã¢ P2P Network PoS Consensus application
layer ABCI Tendermint
9.
Tendermint PoSã®ãããã©ã³ã¶ã¯ã·ã§ã³åŠçé床ãæ©ãïŒæ°å TPSã®åŠçé床 ïŒ ãããã¯çæåŸããã«ãã¡ã€ããªãã£ãåŸãããïŒäžåºŠæ¿èªããã ãã©ã³ã¶ã¯ã·ã§ã³ã¯èŠããªãïŒ ãã©ãŒã¯ããªã åèè³æ 1/3ãŸã§ããªããŒã·ã§ã³ããŒãã¯åæ¢ããŠããŠãåé¡ãªãã ã³ã³ããŒãã³ãåãããèšèšãšABCIã«ãã£ãŠç¬èªã®ã¢ããªã±ãŒã·ã§ ã³ã¬ã€ã€ãŒãæã€ãããã¯ãã§ãŒã³ã·ã¹ãã ãæ§ç¯å¯èœ äž»ãªå©ç¹
10.
ABCI Application BlockChain Interface
11.
P2P Network PoS Consensus application
layer ABCI ABCI ããããèšèªã§BFT察å¿ããåæ£åŠçã¢ããªã±ãŒã·ã§ã³ã ç°¡åã«éçºããããã®ã€ã³ã¿ãŒãã§ãŒã¹ ã¢ããªã±ãŒã·ã§ã³ã¬ã€ã€ãŒã§ã¯ã³ã³ã»ã³ãµã¹ã«ã€ããŠèæ ®ããå¿ èŠããªã
12.
ABCI ã¢ããªã±ãŒã·ã§ã³ ããžã㯠ã³ã³ã»ã³ãµã¹ ãšã³ãžã³ ABCI äžçš®é¡ã®ã¡ãã»ãŒãžãABCI(ã€ã³ã¿ãŒãã§ãŒã¹)ãéããŠéãåãããšã§æ§æãããŠãã ⢠DeliverTx ã¡ãã»ãŒãž
: ãã©ã³ã¶ã¯ã·ã§ã³ã®éä¿¡ãæ€èšŒãç¶æ æŽæ°äŸé Œ ⢠CheckTx ã¡ãã»ãŒãž : æ€èšŒäŸé Œã¡ãã»ãŒãž æ€èšŒå¯Ÿè±¡ã®Txãå«ã ⢠Commit ã¡ãã»ãŒãž : æ°ããªãããã¯ãã³ããããããã¿ã€ãã³ã°ã§ã¢ããªã±ãŒã·ã§ ã³ã«å¯ŸããŠç¶æ æŽæ°ã次ãžã®ãããã¯ãããã®ããã·ã¥å€ãèŠæ±ãã ãã©ã³ã¶ã¯ã·ã§ã³æ€èšŒ ã¹ããŒãæŽæ° ããªããŒã¿ã« æ£ãããããã¯ãè€è£œãã ãŠããããšãä¿èšŒ
13.
message protocol ã¢ããªã±ãŒã·ã§ã³ ããžã㯠ã³ã³ã»ã³ãµã¹ ãšã³ãžã³ ABCI request response ã¡ãã»ãŒãžã¯ã³ã³ã»ã³ãµã¹ããã®ãªã¯ãšã¹ããã¢ããªã±ãŒã·ã§ã³ããã®ã¬ã¹ãã³ã¹ã§æ§æ
14.
blockchain protocol ïŒã€ã®äž»èŠã³ãã¯ã·ã§ã³ã§æ§æãããŠãã mempool connection consensus
connection query connection
15.
blockchain protocol ïŒã€ã®äž»èŠã³ãã¯ã·ã§ã³ã§æ§æãããŠãã mempool connection consensus
connection query connection
16.
mempool connection ã¢ããªã±ãŒã·ã§ã³ ããžã㯠ABCI ã³ãããåã®ãã©ã³ã¶ã¯ã·ã§ã³ã«å¯Ÿããæ€èšŒãã¢ããªã±ãŒã·ã§ã³ã«äŸé Œãã æ€èšŒã«æåããTxãããŒã«ããŠãã ã³ã³ã»ã³ãµã¹ãšã³ãžã³ ã³ã³ã»ã³ãµã¹ ããžã㯠Mempool CheckTx TxResult æ€èšŒæžã¿ãã©ã³ã¶ã¯ã·ã§ã³ãä¿æ ä¿æããTxãã³ããããããããã©ãã·ã¥ãã
17.
blockchain protocol ïŒã€ã®äž»èŠã³ãã¯ã·ã§ã³ã§æ§æãããŠãã mempool connection consensus
connection query connection
18.
consensus connection ã¢ããªã±ãŒã·ã§ã³ ããžã㯠ABCI ã³ã³ã»ã³ãµã¹ ãšã³ãžã³ TxResult TxResult ⊠StateRoot BeginBlock DeliverTx DeliverTx ⊠EndBlcok Commit åæ圢æãããæ°ãããããã¯ãã³ããããããéã«èµ·ããã³ãã¯ã·ã§ã³ ã³ãããããããããã¯æ å ±ãããšã«ãã©ã³ã¶ã¯ã·ã§ã³ã®æ€èšŒããŸãç¶æ é·ç§»ãè¡ã DeliverTxãªã¯ãšã¹ãã§Tendermintã«ãã£ãŠåæ圢æãããTxã« ããç¶æ æŽæ°ãäŸé Œ DeliverTxåŠçåŸã«Commitãªã¯ãšã¹ããè¡ã DeliverTxãªã¯ãšã¹ãã®è¿ãå€ãšããŠTxResultãè¿ã£ãŠã ã Commit ã®è¿ãå€ãšããŠç¶æ æŽæ°åŸã®
state rootãè¿ã(次 ã®ãããã¯ãžã®ããããå«ã)
19.
blockchain protocol ïŒã€ã®äž»èŠã³ãã¯ã·ã§ã³ã§æ§æãããŠãã mempool connection consensus
connection query connection
20.
query connection ã¢ããªã±ãŒã·ã§ã³ ããžã㯠ABCI Query åžžã«ã¢ããªã±ãŒã·ã§ã³ã«å¯ŸããŠç §äŒã§ããã³ãã¯ã·ã§ã³ tendermint coreããRPCã§ãã€ã§ãå¯èœ tendermint core RPC äŸ
: æ¥ç¶ãã¢ãªã©ã®æ€çŽ¢
21.
ABCIå®è£ äŸ Tendermintã®ABCIãçšããå®è£ äŸ Ethermint Cosmos ã³ã³ã»ã³ãµã¹ãTendermintã«ä»»ããŠã¢ããªã±ãŒã·ã§ã³å±€ã«EVMãå®è£ ããŠããã web3ããsolidityãªã©ãšèšã£ãEthereumãšã®äºææ§ããã ã¢ã«ãŽãªãºã ã®ç°ãªããããã¯ãã§ãŒã³éã§ã®ããŒã¯ã³ç§»åãå¯èœã«ãããããžã§ã¯ã Tendermintãã³ã³ã»ã³ãµã¹ãšããŠçšãããããã®ãããã¯ãã§ãŒã³ã«å³ãã圢ã§ABCI ãå®è£ ããããšã§ã¯ãã¹ãã§ãŒã³ãã¯ãããžãŒãæäŸãã
22.
Tendermint Consensus
23.
BFT-based PoS P2P Network PoS
Consensus application layer ABCI BFTãªæ±ºå®è«çã§ãããéšåçéåæã§ããã³ã³ã»ã³ãµã¹ãããã³ã«
24.
Consensus flow åæäºé ãããã³ã«åå è ãããªããŒã¿ãšåŒã¶ ããªããŒã¿ã¯äº€ä»£ããªãããããã¯ãææ¡ ææ¡ããªãããªããŒã¿ã¯æ祚è ãšãªã 2åã®æ祚ãè¡ããã2åãšã2/3以äžã®ããªããŒã¿ã«ãã£ãŠèª ããããã°ã³ãããããã 1åç®ã®æ祚ã pre-vote
ãšãã 2åç®ã®æ祚ã pre-commit ãšãã
25.
Consensus flow
26.
Propose Step ã¹ããŒã¯éã«å¿ããŠéžåºãããããªã㌠ã¿ã«ãã£ãŠæ°ãããããã¯ã«ã€ããŠã®ã³ ã³ã»ã³ãµã¹ããšãããšã«ãªã Txãäžå®æéå ã«æºãŸã£ãŠãããã€ãæ£ ãããšèªããããå Žåã¯ææ¡ãšããŠè¿é£ ã®ããŒãã«ãããŒããã£ã¹ããã ååã®ã©ãŠã³ãã§pre-commitãããªã㣠ãææ¡ãããå Žåã¯ãããææ¡ãã ç°ãªãããªããŒã¿ã«ãã£ãŠäº€ä»£äº€ä»£ã§ææ¡ãããããã«ã©ãŠã³ãããã³æ¹åŒã§éžåºããã 決å®è«ç
27.
Pre-vote Step ææ¡ããããããã¯ã«å¯ŸããŠäžåç®ã®æ 祚ãè¡ã(æ祚 =
眲å) 2/3以äžã®ããªããŒã¿ã«ããæ祚ãéãŸã ãŸã§Pre-voteã¹ãããã¯äžå®æéç¶ã 2/3以äžã®æ祚ãéãŸãã°å³åº§ã«æ¬¡ã®ã¹ã ãããžé·ç§»ãã 1/3ã®ã¯ã©ãã·ã¥ããã¶ã³ãã³ãªæ¯ãèãã«å¯Ÿ åŠå¯èœ ã¿ã€ã ã¢ãŠããããããšã§å®å šãªéåæã§ã¯ãªã匱ãéåæ(éšåçéåæ)ãšããŠåäœãã BFTã§ãã
28.
Pre-commit Step 2/3以äžã®æ祚ãéãŸã£ããããã¯ã«å¯Ÿã ãŠ2åç®ã®æ祚ãè¡ã 2/3以äžã®æ祚ãéãŸãã°ãã®ãããã¯ã¯ ã³ããããããããã¯ãã§ãŒã³ã«ç¹ãã ã 2/3以äžã®æ祚ãéãŸããªãã£ãããã㯠ã¯æ¬¡ã®ã©ãŠã³ãã«åããã pre-commitãè¡ããšæ°ããªpre-voteã§2/3以äžã®æ祚æ°ãåŸããããã¯ãææ¡ããããŸã§ æ祚ããããšã¯ã§ããªãããã®ããšãããåããªããŒã¿ãpre-commit ã§ãããããã¯ã¯1ã€ã®ã¿ ãã©ãŒã¯ããªã
29.
Tendermint vs X åæ£ã¹ãã¬ãŒãž ãããã¯ãã§ãŒã³ zookeeper,
etcd, consulãªã©ã® éBFTã³ã³ã»ã³ãµã¹äžã«åœ¢æãããåæ£KVS Bitcoin, Ethereumãªã©ã®ãããªãã¯ãª ãããã¯ãã§ãŒã³ã«ãããã³ã³ã»ã³ãµã¹ HyperLedger Fabricã®ãã㪠permitted ãªã ããã¯ãã§ãŒã³ã®ã³ã³ã»ã³ãµã¹
30.
Tendermint vs åæ£ã¹ãã¬ãŒãž åæ£ã¹ãã¬ãŒãž zookeeper,
etcd, consulãªã©ã® éBFTã³ã³ã»ã³ãµã¹äžã«åœ¢æãããåæ£KVS Raftã³ã³ã»ã³ãµã¹ãªã©éåžžã«ç°¡åãªã¢ã«ãŽãªãºã ã䜿çšããŠãã 1/2ãŸã§ã®ã¯ã©ãã·ã¥ã蚱容ã§ããããïŒã€ã§ããã¶ã³ãã³ãªæ¯ãèã ãããããšã·ã¹ãã å šäœãç Žå£ããå¯èœæ§ãæ〠BFTã§ã¯ãªãããšãæ倧ã®éã
31.
Tendermint vs Public
Blockchain BitcoinãEthereumã¯åæçã«åãã³ã³ã»ã³ãµã¹ã¢ãã« ãããã¯çææéãšããåºå®ãããæéæ¯ã«ã³ã³ã»ã³ãµã¹ãåããšããåææ§(ãã®äžã§äŒ æãæ€èšŒããã³ã¹ã®çºèŠãè¡ã) Tendermintã¯éšåçéåæ æäœéã®ã¿ã€ã ã¢ãŠãã¯ãããã®ã®ããªããŒã¿ã®2/3以äžãæ祚ããã°ã³ã³ã»ã³ãµã¹ãåã ãããšããæå³ã§åºå®ãããŠããªã åæçãªã³ã³ã»ã³ãµã¹ã¢ã«ãŽãªãºã ã§ã¯ãã§ãŒã³ã®ãã©ãŒã¯ãããã€ã¥ ãã åºå®å€ãååšããããã§åæã«è€æ°ã®ã³ã³ã»ã³ãµã¹ãåãããŠããŸã ãããã¯ãã§ãŒã³ Bitcoin, Ethereumãªã©ã®ãããªãã¯ãª ãããã¯ãã§ãŒã³ã«ãããã³ã³ã»ã³ãµã¹
32.
Tendermint vs Permitted
Blockchain åå ããããªããŒã¿ã«å¶éããããã®ãïŒã€ã®BFTãéæããæ¹æ³ å¶éãããããšãããšãã®ã¢ããªã±ãŒã·ã§ã³ãžã®åå è ã¯ãããªããŒã¿ ãæé»çã«ä¿¡çšããå¿ èŠãçãŸããã BFTã§ã¹ã±ãŒã«ããã¢ã«ãŽãªãºã ãšããŠPBFTãæãããããã permitted ãªã³ã³ã»ã³ãµã¹ã§ããããšã¯å€§ããªéã ãããã¯ãã§ãŒã³ HyperLedger Fabricã®ãã㪠permitted ãªã ããã¯ãã§ãŒã³ã®ã³ã³ã»ã³ãµã¹
33.
The Problem of
Tendermint ⢠決å®è«çãªPoSã®ãããããã¯ææ¡è ãæ祚è ã¯åžžã«èšç® ã§å°ãããšãå¯èœã§ãããæ»æã®å¯Ÿè±¡ãšãªãã ⢠ææ¡è ãžã®DDoSã«ãã£ãŠãã§ãŒã³å šäœãæ¢ããããšã㧠ãã Sentry Node Architectureã§å¯Ÿå¿äºå® Sentry Node Architecture : ããŒãã®IPã¢ãã¬ã¹ãéå ¬é㫠⢠Nothing at Stake åé¡(PoSå ±é) æ祚ã«ãããžããããè³éã®åŒãåºãã«äžå®æéãããããšã§å¯ŸåŠ
34.
Conclusion ⢠Layer1ã§ã®ã³ã³ã»ã³ãµã¹ã¢ã«ãŽãªãºã ã«ããã¹ã±ãŒãªã³ã°è§£æ±ºãšããŠã®Tendermint ãçŽ¹ä» â¢ PoSã ããåŠçé床ãæ©ã â¢
ABCIã«ã€ã㊠⢠ã³ã³ã»ã³ãµã¹ã¢ã«ãŽãªãºã ãšã®ã€ã³ã¿ãŒãã§ãŒã¹ãšãªã£ãŠããããšã§æ§ã ãªèšèª ã§ç¬èªã®ãããã¯ãã§ãŒã³ã¢ããªã±ãŒã·ã§ã³ãå®è£ å¯èœ ⢠Ethermint ã cosmosãªã©ãå®è£ äŸ â¢ Tendermint Consensus ã«ã€ã㊠⢠決å®è«çã«æ祚è ãéžåºããéšåçéåæã«ã³ã³ã»ã³ãµã¹ãåãäºã«ããã ãã©ãŒã¯ã®ãªãå³åº§ã«ãã¡ã€ããªãã£ãåŸããããããªãã¶ã³ãã³èæ§ã®ãã ã¢ã«ãŽãªãºã ã§ãã. ⢠PoSã®æã€æœåšçãªåé¡ã«ããããŠã¯çŸåšãç 究ãé²ããããŠãã
Editor's Notes
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