Questions tagged [hyperledger-chaincode]
448 questions
-1
votes
1 answer
Spining up couchdb in hyperledger fabric
How to spring up couchdb in Hyperledger fabric in development mode for chaincode because by default its takes leveldb as a state database. So in order to perform rich queries couchdb has to be used as state database (I am following Hyperledger…
Kundan Kumar
- 14
-1
votes
1 answer
How to query all the states from ledger whose key starts with character particular character in hyperledger fabric chaincodes?
I want to query all the values saved in the blockchain whose key starts with charcter 'O' and retrieve the list of them.
Hrishabh
- 31
- 5
-1
votes
1 answer
Hyperledger Fabric v1.1 and Java Chaincode
I'm working on a project that requires that I use version 1.1 of Hyperledger Fabric. Is it possible to plug Java chaincode in this version? I know Java chaincode started to be supported only in version 1.3 but is it possible to plug it in version…
Miguel Reis
- 97
- 8
-2
votes
2 answers
Not able to get the value of a custom attribute in hyperledger-fabric using cid.getAttributeValue function
Other than the 3 attributes hf.EnrollmentId, hf.type and hf.Affiliation, I've created a custom attribute named email and added it as attrs:[{name: 'email', value: rahul18@gmail.com, ecert: true}] and it was successfully added to the attribute…
-2
votes
2 answers
HYperledger Fabric Building First Network
While trying to build the first network with Windows this error keeps coming!
Error: Failed to get client TLS config: Failed to read…
-2
votes
1 answer
Reporting without chaincode on hyperledger fabric peer
Can we implement a channel between two peers and initiate a transaction just to store data without any chaincode or smartcontract? If yes any example
Ashar
- 1
-2
votes
1 answer
Failed to invoke chaincode name:"scbcch" , error: timeout expired while executing transaction
I am trying to fetch data from blockchain using query in chaincode. I have invoked around 2,50,000 records in blockchain and trying to fetch the data using query. When i run the chaincode and get the peer logs, I am getting the below error.
failed…
Priyanka
- 19
- 1
- 8
-2
votes
1 answer
Cannot instantiate this java chaincode
I'm trying to deploy a Java based chaincode in "first-network" sample.
The code is generated with IBM Blockchain Platform plugin for VSCode.
It works in the local environment (Using the VSCode plugin to install, invoke,...), but when I try to test…
remiotore
- 3
- 1
-2
votes
1 answer
Cannot use (type []map[string]interface {}) as type []string in field value
How to store Array of JSONs (in string format) in []string (individual JSON string in each index of string array) ?
package main
import (
"encoding/json"
"fmt"
)
type StructData struct {
Data []string `json:"data"`
}
func main() {
…
user12355116
-2
votes
2 answers
Restrict invoke access for members at fabric chaincode level
I am trying to restrict invoke access for members dynamically in chaincode level and had found this method in a tutorial
"stub.GetCallerCertificate" but getting an error.
Error:stub.GetCallerCertificate undefined (type shim.ChaincodeStubInterface…
Dushyanth Kumar Reddy
- 1,222
- 11
- 21
-2
votes
1 answer
How to count number of record filtered by selector
I'm making smart contract with Go and I want to use Rich Query to get total count of records from CouchDB filtered by some selector like:
{\"selector\":{\"doc_type\": \"person\"}}
It is similar to:
select count(*) from tb where ...
as SQL query but…
Chhaileng
- 2,428
- 1
- 27
- 24
-2
votes
1 answer
Hyperledger Fabric Go Chaincode - Signing inside chaincode code
I'm working on Hyperledger Fabric with Golang Chaincode and I have the following question.
Is it possible to have each endorser sign something in the code of the chaincode?
For example: I have a client proposing a transaction and I want to not only…
Miguel Reis
- 97
- 8