![Chaincode example
IBM Developer@horeaporutiu
var request = {
chaincodeId: ‘carauction’, //name of chaincode to execute
fcn: ‘initLedger’, // which chaincode function to execute
args: [‘’], //array of args for chaincode function
txId: fabric_client.newTransactionID(); //assign new txn id
}
var channel = fabric_client.newChannel(‘defaultchannel’);
return channel.sentTransactionProposal(request);
var fabric_client = require(‘fabric-client);](https://image.slidesharecdn.com/evmtalk-190130021213/85/Ethereum-Smart-Contracts-on-Hyperledger-Fabric-15-320.jpg)
Ethereum Smart Contracts on Hyperledger Fabric
- 1. @horeaporutiu IBM Developer Horea Porutiu Software Developer | Advocate, IBM Jan 2019 Running Ethereum Smart Contracts on Hyperledger Fabric
- 2. Agenda 1. EVM Concepts 2. Hyperledger Architecture 3. Hyperledger + EVM 4. Demo IBM Developer@horeaporutiu @pluralsight
- 3. Hyperledger Fabric + Ethereum Contracts IBM Developer@horeaporutiu https://www.pinterest.com/pin/215469163401716164/
- 4. Hyperledger Fabric v. Ethereum •Permissioned @horeaporutiu IBM Developer https://news.coinsquare.com/investing/ethereum-daily-transactions-half-january-high/ https://www.hyperledger.org/projects/fabric • Permissionless (exceptions such as Quorum)• Customizable consensus policy • Proof of work • Forks are common Ethereum vs. Ethereum Classic
- 5. EVM + Hyperledger Motivations IBM Developer@horeaporutiu • Hyperledger Burrow is Apache 2.0 licensed• Hyperledger Burrow is Apache 2.0 licensed
- 6. EVM + Hyperledger Motivations IBM Developer@horeaporutiu • Hyperledger Burrow is Apache 2.0 licensed • Big developer community around Ethereum - can migrate EVM byte code contracts
- 7. EVM + Hyperledger Motivations IBM Developer@horeaporutiu • Hyperledger Burrow is Apache 2.0 licensed • Big developer community around Ethereum - can migrate EVM byte code contracts • Eliminate vendor-lock
- 8. EVM + Hyperledger Motivations IBM Developer@horeaporutiu • Hyperledger Burrow is Apache 2.0 licensed • Big developer community around Ethereum - can migrate EVM byte code contracts • Eliminate vendor-lock • Can still use Ethereum dev tools (Remix, Truffle, etc.) and languages (Solidity, Vyper etc.)
- 9. Hyperledger Fabric Overview IBM Developer@horeaporutiu Blockchain network - 1 org Certificate Authority Orderer Peer (Local) Node.js app + Fabric SDK
- 10. Node.js app + Fabric SDK IBM Developer@horeaporutiu Blockchain network - 1 org Certificate Authority Orderer Peer (Local) 1. Enrollment - Register admin with Certificate Auth Hyperledger Fabric Chaincode Database Blockchain network - 1 org Certificate AuthorityCertificate Authority Orderer Peer Chaincode Ledger 1. Hyperledger Fabric Overview
- 11. Enrollment IBM Developer@horeaporutiu • Enrollment - process of generating keys and certificates from the Certificate Authority
- 12. Enrollment IBM Developer@horeaporutiu • First generate certificate for our admin identity and use those to register a new client identity • Enrollment - process of generating keys and certificates from the Certificate Authority
- 13. Node.js app + Fabric SDK IBM Developer@horeaporutiu Blockchain network - 1 org Certificate Authority (Local) 1. 1. Enrollment - Register admin with Certificate Auth Certificate Authority Orderer Peer Chaincode Ledger Hyperledger Fabric Overview
- 14. Hyperledger Fabric Overview Node.js app + Fabric SDK IBM Developer@horeaporutiu Blockchain network - 1 org Certificate Authority Orderer (Local) 1. Enrollment - Register admin with Certificate Auth 2. Send transaction to peer 🔑 Peer Chaincode Database Blockchain network - 1 org Certificate Authority Orderer Peer Chaincode Database Blockchain network - 1 org Certificate AuthorityCertificate Authority Orderer Peer Chaincode Ledger 2. 1.
- 15. Chaincode example IBM Developer@horeaporutiu var request = { chaincodeId: ‘carauction’, //name of chaincode to execute fcn: ‘initLedger’, // which chaincode function to execute args: [‘’], //array of args for chaincode function txId: fabric_client.newTransactionID(); //assign new txn id } var channel = fabric_client.newChannel(‘defaultchannel’); return channel.sentTransactionProposal(request); var fabric_client = require(‘fabric-client);
- 16. Transaction execution IBM Developer@horeaporutiu Node.js app + Fabric SDK (Local) 2. Send transaction proposal to peer🔑 Peer Chaincode Ledger 2. • Check endorsement policy - which peers need to endorse transaction
- 17. Transaction execution IBM Developer@horeaporutiu Node.js app + Fabric SDK (Local) 2. Send transaction proposal to peer🔑 Peer Chaincode Ledger 2. • Check endorsement policy - which peers need to endorse transaction • The transaction proposal will go to the peers in the endorsement policy
- 18. Node.js app + Fabric SDK IBM Developer@horeaporutiu Blockchain network - 1 org Certificate Authority Orderer Peer (Local) 1. 1. Enrollment - Register admin with Certificate Auth 2. Send transaction to peer 3. Peers return endorsed txn Hyperledger Fabric Overview 🔑 Peer Chaincode Ledger 3. 2.
- 19. Node.js app + Fabric SDK IBM Developer@horeaporutiu Blockchain network - 1 org Certificate Authority Orderer Peer (Local) 1. 1. Enrollment - Register admin with Certificate Auth 2. Send transaction to peer 3. Peers return endorsed txn Hyperledger Fabric Overview 🔑 Peer Chaincode Ledger 3. 2. 4. Sends endorsed txn to ordering 4.
- 20. Node.js app + Fabric SDK IBM Developer@horeaporutiu Blockchain network - 1 org Certificate Authority Orderer Peer (Local) 1. 1. Enrollment - Register admin with Certificate Auth 2. Send (txn)transaction to peer 3. Peers return endorsed txn Hyperledger Fabric Overview 🔑 Peer Chaincode Ledger 2. 4. Send endorsed txn to ordering 4. 5. Peer updates ledger 5. 3.
- 21. Node.js app + Fabric SDK IBM Developer@horeaporutiu Blockchain network - 1 org Certificate Authority Orderer Peer (Local) 1. 1. Enrollment - Register admin with Certificate Auth 2. Send (txn)transaction to peer 3. Peers return endorsed txn Hyperledger Fabric + EVM 🔑 Peer EVM Ledger 2. 4. Send endorsed txn to ordering 4. 5. Peer updates ledger 5. 3.
- 22. Ethereum Concepts IBM Developer@horeaporutiu • Accounts (EOA and Contract accounts) - no balance / token in Hyperledger
- 23. Ethereum Concepts IBM Developer@horeaporutiu • Accounts (EOA and Contract accounts) - no balance / token in Hyperledger • Gas
- 24. Ethereum Concepts IBM Developer@horeaporutiu • Accounts (EOA and Contract accounts) - no balance / token in Hyperledger • Gas • EVM Transaction Format (To, From, data)
- 25. Design IBM Developer@horeaporutiu • EVM Chaincode (smart contract that can run EVM byte code smart contracts)
- 26. Design IBM Developer@horeaporutiu • EVM Chaincode (smart contract that can run EVM byte code smart contracts) • Fabproxy - wrapper around Fabric Go SDK - implements Ethereum JSON RPC API - use Ethereum tools like Remix / Web3.js
- 27. Design IBM Developer@horeaporutiu • EVM Chaincode (smart contract that can run EVM byte code smart contracts) • Fabproxy - wrapper around Fabric Go SDK - implements Ethereum JSON RPC API - use Ethereum tools like Remix / Web3.js fabproxy Ethereum JSON RPC API GO SDK
- 28. Design IBM Developer@horeaporutiu • EVM Chaincode (smart contract that can run EVM byte code smart contracts) • Fabproxy - wrapper around Fabric Go SDK - implements Ethereum JSON RPC API - use Ethereum tools like Remix / Web3.js fabproxy Ethereum JSON RPC API GO SDK peer API EVMCC Ledger StateWriter
- 29. Design IBM Developer@horeaporutiu • EVM Chaincode (smart contract that can run EVM byte code smart contracts) • Fabproxy - wrapper around Fabric Go SDK - implements Ethereum JSON RPC API - use Ethereum tools like Remix / Web3.js fabproxy Ethereum JSON RPC API GO SDK peer API EVMCC Ledger StateWriter1. User request
- 30. Design IBM Developer@horeaporutiu • EVM Chaincode (smart contract that can run EVM byte code smart contracts) • Fabproxy - wrapper around Fabric Go SDK - implements Ethereum JSON RPC API - use Ethereum tools like Remix / Web3.js fabproxy Ethereum JSON RPC API GO SDK peer API EVMCC Ledger StateWriter1. User request 2. Invokes API
- 31. Design IBM Developer@horeaporutiu • EVM Chaincode (smart contract that can run EVM byte code smart contracts) • Fabproxy - wrapper around Fabric Go SDK - implements Ethereum JSON RPC API - use Ethereum tools like Remix / Web3.js fabproxy Ethereum JSON RPC API GO SDK peer API EVMCC Ledger StateWriter1. User request 2. Invokes API 3. Invokes EVM
- 32. Design IBM Developer@horeaporutiu • EVM Chaincode (smart contract that can run EVM byte code smart contracts) • Fabproxy - wrapper around Fabric Go SDK - implements Ethereum JSON RPC API - use Ethereum tools like Remix / Web3.js fabproxy Ethereum JSON RPC API GO SDK peer API EVMCC Ledger StateWriter1. User request 2. Invokes API 3. Invokes EVM 4. Get contract code
- 33. Design IBM Developer@horeaporutiu • EVM Chaincode (smart contract that can run EVM byte code smart contracts) • Fabproxy - wrapper around Fabric Go SDK - implements Ethereum JSON RPC API - use Ethereum tools like Remix / Web3.js fabproxy Ethereum JSON RPC API GO SDK peer API EVMCC Ledger StateWriter1. User request 2. Invokes API 3. Invokes EVM 4. Get contract code 5. Generate read & write sets
- 36. IBM Blockchain Starter Plan IBM Developer@horeaporutiu •http://goo.gl/i9WZcH • Need either business or student email address, gmail wont work • Takes a few business days to process, please be patient
- 37. Links • Fabric-chaincode-evm - https://github.com/ hyperledger/fabric-chaincode-evm @horeaporutiu IBM Code • Demo - https://github.com/IBM/hyperledger- fabric-evm-demo • EVM + Hyperledger Tutorials - https:// www.youtube.com/user/horeaporutiu
- 38. Contact • Questions: horea.porutiu@ibm.com • Social: Tweets @horeaporutiu • Site: https://horeaporutiu.com/ • Youtube: https://www.youtube.com/user/ horeaporutiu @horeaporutiu IBM Developer