EXTENT-2019: Testing in the Fast Chain

Testing in the Fast Chain
Moray Grieve, Head of QA, R3

EXTENT-2019
17 September 2019, London

At EXTENT-2019, Moray Grieve, Head of QA, R3 gave a brief overview of R3’s Corda platform and shared his insights into the particulars of testing DLT systems.
Follow the link to watch the video: https://youtu.be/Jnm-a5sQzfA

To learn more about Exactpro, visit our website https://exactpro.com/
EXTENT Conference website: https://extent.exactpro.com/
Follow us on
LinkedIn https://www.linkedin.com/company/exactpro-systems-llc
Twitter https://twitter.com/exactpro
Facebook https://www.facebook.com/exactpro/
Instagram https://www.instagram.com/exactpro/

Subscribe to Exactpro YouTube channel https://www.youtube.com/c/exactprosystems

Transcript

1. 1
   
   1
   
   Testing in the fast chain
   Dr. Moray Grieve, Head of QA
   

   View Slide

2. Enterprise grade blockchain platform enabling
   distrusting parties to form and maintain consensus
   about the existence, status and evolution of a set of
   shared facts.
   2
   

   View Slide

3. Key Concepts
   States
   States are immutable objects that
   represent shared facts such as a
   financial agreement or contract at a
   specific point in time
   Transactions
   Transactions consume input states and
   create output states. Newly created
   output states replace the input states
   which are marked as historic
   Contracts
   Contracts control the evolution of
   states by allowing relevant
   participants to check for transaction
   validity
   Flows
   Flows are light-weight processes used
   to coordinate interactions required for
   peers to create and agree
   transactions
   

   View Slide

4. The Ledger
   The ledger from each peer’s point of view is the
   union of all intersections with other network peers
   Numbered circles
   represent unique
   shared facts
   4
   

   View Slide

5. Transactions
   TxHash:f70f5…
   Index: 2
   TRANSACTION
   Hash = 95fd065cb0…
   TxHash:8031d…
   Index: 0
   New State
   1
   New State
   2
   TxHash:95fd0…
   Index: 1
   TRANSACTION
   Hash = 1ba0ce7a71…
   TxHash: 0dbfc…
   Index: 0
   New State
   1
   TxHash:5600d…
   Index: 3
   TRANSACTION
   Hash = 0dbfcf6665…
   TxHash:047dd…
   Index: 0
   New State
   1
   New State
   2
   HISTORIC
   HISTORIC
   • Transactions are proposals to update the
   ledger
   • A transaction will only be committed if
   • It doesn’t contain double spends
   • It is contractually valid
   • It is signed by all required parties
   • State references link together
   transactions over time, forming
   transaction chains
   

   View Slide

6. Flows
   ALICE
   BOB
   1. Alice creates a new
   transaction proposal and
   signs it
   2. Alice sends the proposal
   and her signature to Bob
   3. Bob inspects the proposal,
   verifies it and then signs it
   4. Bob sends back the
   transaction and his signature
   to Alice
   5. Alice verifies the transaction
   and checks Bob’s signature
   Uninvolved peers do not receive any of
   Alice’s or Bob’s transactions
   

   View Slide

7. What it is What it does
   Trust
   Root
   The single, long-term cryptographic
   key which all network‘s identity
   (X509) certificates root back to
   It provides the basis of trust in
   the provenance of data,
   recognised by participants
   Identity
   Manager
   Admits new members onto the
   network via granting an identity
   certificate
   Performs 3 checks on new
   certificate requests and grants
   based on passing the checks
   Network
   Map
   A list of IP addresses and legal entity
   names of each participant on the
   network, which all participants can
   access
   Acts as a Corda Network ‘phone
   directory’
   Notary Node or cluster of notary nodes Prevents double-spend of input
   states
   nodes
   notary
   A Corda Network
   The Network
   Permissioned network with public identities allowing nodes to communicate
   directly with each other
   

   View Slide

8. Testing challenges
   • Platform technology (build CorDapps to test the full API)
   • Highly distributed (complexity in test automation)
   • Heterogeneous networks (combinatorial explosion)
   • Highly secure (cryptography, ledger consistency is everything)
   • Eventually consistent (transaction flows can be complex)
   • Evolutionary lifecycle (platform and CorDapp upgrades)
   • Highly available (resiliency testing)
   • Temporal (performance testing)
   

   View Slide

9. Heterogenous networks
   9
   Corda OS 4.0
   Corda ENT 4.0
   Corda ENT 4.1
   Corda ENT 4.1 CorDapp 1.1 / 1.3
   Corda OS 4.0 CorDapp 1.1 / 1.2 / 1.3
   Operating Systems
   JVMs
   HSMs
   Databases
   Corda Tokens SDK
   Corda Accounts SDK
   1.0, 1.1
   1.0
   Corda Enterprise 4.0 can be used in mixed-version networks seamlessly
   transacting with nodes running on a minimum platform version of 4
   

   View Slide

10. Combinatorial testing
    1
    0
    The number of unique connections in a network is n*(n-1)/2
    • 6 Corda versions (3 Open Source, 3 Enterprise)
    • 3 Token SDK versions, 2 Account SDK versions
    • 5 CorDapps, each with 2 versions
    • 4 Operating systems, 2 JVMs, 5 HSMs, 5 databases
    • 14,400 Node configurations, 103,672,800 connections, ~1 billion testcases
    • If 1 min to run a clean test, time to execute ~2,000 years
    • Pairwise testing reduces to 34 configurations, 561 connections, ~4 days
    • Two or more differences across Corda parameters reduces network density by 10%
    • Parallelize across 20 machines to reduce to ~4 hours
    • Bring up as a single network and run dirty tests
    

    View Slide

11. London
    2 London Wall Place,
    London, EC2Y 5AU
    Hong Kong
    Bonham Strand, 7F Office 18-121
    Hong Kong
    www.r3.com
    Thank you
    Brazil
    Av. Angélica, 2529 - Bela Vista
    6th Floor
    São Paulo - SP, 01153-000, Brazil
    New York
    11 West 42nd Street, 8th Floor
    New York, NY 10036
    Singapore
    18 Robinson Road, Level #14-02
    Singapore, 048547
    

    View Slide