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How does a client app communicate with Hyperledger fabric chaincode (Smart Contracts)?
Suggested Answer: A
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37 comments · newest first
LA
Laquita
11 months ago
C is definitely wrong, apps can communicate directly without Composer.
MA
Martha
11 months ago
Wait, can you really skip Composer entirely? That seems off.
AN
Antione
12 months ago
D sounds right, direct IP calls make sense for invoking.
JO
Joesph
12 months ago
I think B is misleading, Composer isn't always needed.
JO
Jonelle
12 months ago
A is correct, the SDK is essential for invoking chaincode.
MA
Mary
1 year ago
I vaguely remember something about pointing to a node's IP address, but I’m not clear on whether that’s the only way to start the write process.
VE
Venita
1 year ago
I’m a bit confused about Hyperledger Composer. I thought it was used for simplifying interactions, but I can't recall if it's mandatory for all client app communications.
BE
Benedict
1 year ago
I think I saw a question about how apps communicate with chaincode in our practice tests, and I feel like it mentioned something about invoking transactions.
CA
Carli
1 year ago
I remember that the client app definitely uses an SDK to interact with the chaincode, but I'm not sure if it directly invokes the functionality or if there's something else involved.
NE
Nelida
1 year ago
Wait, I thought Hyperledger Composer was used to communicate with the chaincode. But now I'm second-guessing myself. Maybe I should just go with option A, it sounds the most familiar.
IV
Ivory
1 year ago
Okay, I've got this. The client app uses an SDK to interact with the chaincode, which then announces the transaction to the required peers for endorsement. That's definitely option A. I feel pretty confident about that.
DO
Dona
1 year ago
Hmm, I'm a bit confused on this one. I know Hyperledger Fabric uses chaincode, but I'm not sure how the client app actually communicates with it. I'll have to review my notes on the SDK and transaction flow.
CA
Casandra
1 year ago
This is a tricky one, but I think the key is understanding how the client app interacts with the Hyperledger Fabric network. I'm pretty sure it's option A, where the app uses an SDK to invoke functionality on the chaincode.
PA
Paris
1 year ago
Okay, I've got this. SAP Ariba is the obvious choice here - it's SAP's leading solution for procurement and supplier management. The other options like Hybris and SuccessFactors don't seem as directly relevant.
CA
Carole
1 year ago
Hmm, I'm not totally sure about this one. I'll have to think it through carefully before answering.
KI
Kimbery
1 year ago
I feel pretty confident about this one. The key is to focus on the specific details of each vulnerability and not get distracted by the different institution types.
EL
Eloisa
1 year ago
I remember we talked about self-efficacy and goal setting in class, but I'm not completely sure if it's about cognitive-behavioral principles or something else.
LA
Lazaro
1 year ago
I bet the correct answer involves some kind of secret handshake and interpretive dance. Blockchain is all about the theatrics, right?
RO
Roy
1 year ago
A) The app uses an SDK which invokes functionality on the chaincode which then announces the transaction to any peers required to endorse the transaction
CO
Coletta
1 year ago
D) The app points to a node's IP address, then calls an invoke function on the chaincode address to start the write process
EV
Evelynn
1 year ago
A) The app uses an SDK which invokes functionality on the chaincode which then announces the transaction to any peers required to endorse the transaction
KE
Kelvin
1 year ago
Wait, so I can't just use my trusty command line and curl to talk to the chaincode? Darn, I was hoping for some old-school hacking action.
CL
Clay
1 year ago
Option C is definitely not correct. Client apps can communicate with Hyperledger Fabric directly without needing Composer as an intermediary.
SH
Shawnta
1 year ago
Option C is definitely not correct. Client apps can communicate with Hyperledger Fabric directly without needing Composer as an intermediary.
CH
Chu
1 year ago
D) The app points to a node's IP address, then calls an invoke function on the chaincode address to start the write process
CA
Casey
1 year ago
A) The app uses an SDK which invokes functionality on the chaincode which then announces the transaction to any peers required to endorse the transaction
MA
Mattie
2 years ago
Option B with Hyperledger Composer is an interesting approach, but I'm not sure if it's the only way to communicate with chaincode.
LO
Lorrine
1 year ago
Option B with Hyperledger Composer is an interesting approach, but I'm not sure if it's the only way to communicate with chaincode.
AM
Amber
1 year ago
D) The app points to a node's IP address, then calls an invoke function on the chaincode address to start the write process
AL
Alyssa
1 year ago
A) The app uses an SDK which invokes functionality on the chaincode which then announces the transaction to any peers required to endorse the transaction
FR
Frank
2 years ago
I think Option D is a bit too simplistic. Hyperledger Fabric has more complexity than just pointing to an IP address and calling a function.
JA
Janine
1 year ago
User 2: Janine, you're right. Option A explains it better. The app uses an SDK to invoke functionality on the chaincode and announce the transaction to the required peers.
LA
Layla
1 year ago
User 1: I think Option D is a bit too simplistic. Hyperledger Fabric has more complexity than just pointing to an IP address and calling a function.
HO
Hoa
2 years ago
Interesting point, Oretha. I can see how that could also be a valid approach. It's important to understand all the options.
ED
Edelmira
2 years ago
Option A seems like the correct way to interact with Hyperledger Fabric chaincode. Using an SDK to invoke chaincode functions makes sense.
OR
Oretha
2 years ago
I disagree, I believe the answer is D. The app directly calls the chaincode address to initiate the write process.
HO
Hoa
2 years ago
I think the answer is A, because the app uses an SDK to interact with the chaincode and notify the necessary peers.