"Family budget" in minutes with Chainstack

- Today’s showcase: “Family budget”
- Live! Create the infrastructure in minutes
- The smart contract and use case
- Live! Deploy a contract and make transactions
- Q&A

Transcript

1. Proprietary and Confidential © 2019
   hayorov
   chainstack.com !1
   Blockchain project in minutes 

   with Chainstack
   Alex Khaerov
   Development Lead
   alex.khaerov@chainstack.com
   

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2. !2
   Agenda
   • Today’s showcase: “Family budget”
   • Live! Create the infrastructure in minutes
   • The smart contract and use case
   • Live! Deploy a contract and make transactions
   • Q&A
   

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3. Proprietary and Confidential © 2019
   hayorov
   chainstack.com !3
   Quorum blockchain
   (ethereum-based)
   Jupyter notebook
   with web3py
   

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4. Proprietary and Confidential © 2019
   hayorov
   chainstack.com !4
   Today’s showcase
   “Family budget”
   

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5. Proprietary and Confidential © 2019 !5
   Family budget
   Total balance
   - 200$ - 10$ - 15$
   -100$
   - 50$ - 100$
   1000$
   - 10$
   - 15$
   900$
   890$
   875$
   675$
   575$
   560$
   510$
   500$
   

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6. Proprietary and Confidential © 2019 !6
   Family budget
   NaN$
   1000$
   define
   the balance
   X
   X
   Total balance
   

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7. Proprietary and Confidential © 2019
   My Family
   The blockchain infrastructure
   Create a project
   The balance tracker
   Dad
   Mom
   Girl
   Boy
   >
   Contract
   Deploy a network with 4 nodes
   Write some smart contract
   

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8. Proprietary and Confidential © 2019
   hayorov
   chainstack.com !8
   Live! Create the infrastructure
   in minutes
   

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9. Proprietary and Confidential © 2019 !9
   

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10. Proprietary and Confidential © 2019
    hayorov
    chainstack.com !10
    The smart contract
    

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11. Proprietary and Confidential © 2019
    peek the balance
    init the program
    the program name
    define the balance
    & record spendings
    

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12. Proprietary and Confidential © 2019
    hayorov
    chainstack.com !12
    The use case
    

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13. Proprietary and Confidential © 2019 !13
    Dad deploys the contract
    Mom
    Addr: 0x4…d1
    Mom defines the balance
    Dad
    Addr: 0x3…d3
    simpleStorage.constructor(0x4…d1) simpleStorage.makeRecord(1000)
    

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14. Proprietary and Confidential © 2019 !14
    records spendings
    Boy
    Addr: 0x4…22
    Dad
    Addr: 0x3…d3
    Mom
    Addr: 0x4…d1
    Girl
    Addr: 0x5…99
    simpleStorage.makeRecord(-15)
    simpleStorage.getBalance()
    gets the balance
    

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15. Proprietary and Confidential © 2019
    hayorov
    chainstack.com !15
    Live! Deploy a contract
    and make transactions
    

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16. Proprietary and Confidential © 2019 !16
    

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17. Proprietary and Confidential © 2019 !17
    bit.ly/cs14free
    Try Chainstack with free 14 days
    Alex Khaerov
    Development Lead
    alex.khaerov@chainstack.com
    and subscribe for updates at bit.ly/cs-updates
    

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