node-sdk | Transloadit 's official Node.js SDK | SDK library
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kandi X-RAY | node-sdk Summary
This is the official Node.js SDK for Transloadit's file uploading and encoding service.
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QUESTION
I am trying to build a decentralized app that able to do show the block header like data hash, the previous hash of the block when a user submits a new transaction. However, It seems like the new version of Fabric Node SDK 2.2 removes the function queryblock.
I refer on the documentation at https://hyperledger.github.io/fabric-sdk-node/release-2.2/module-fabric-network.html and currently still looking for some workaround to show the block info of the user's transaction.
The ideal output that I wish to achieved is almost similar to what Hyperledger Explorer provide.The reference can be check at:
which show the information such as Number of Blocks, Data Hash, Previous Hash and other Block Information regarding the hash.
Some information that I able to gatherThere are some information like BlockEvent that have the name
blockData
in the interfaceBlockEvent
. However, I can't seem to find it whennpm install i fabric-network
.Since the user can query and check their hash with the ledger, a key or hash need to be returned to the user upon transaction success. Is there any API function for this? So far, I able to found there are
getTransactionId()
in the classTransaction
. But is this one that I need to use?
All of the reference since to deal with the old version of node SDK which is version 1.4.
- Hyperledger Fabric : How to Query blocks using fabric NodeSDK
- HyperLedger Fabric Get Block Info - using node.js
- how to display current hash,previous hash using node js on view pages for hyperledger fabric
- How do you calculate the Block Hash for the Current Block in Hyperledger Fabric with javascript?
- How to get history of asset with block hash in hyperledger fabric using node sdk
ANSWER
Answered 2021-Mar-23 at 10:30You can query block number by call function GetBlockByNumber
of qscc
contract. Example:
QUESTION
I'm trying to use Froala's imgageUploadToS3 method to drop images into my AWS bucket.
Been struggling with this all day, and making little progress.
In my node environment, I'm using the Node-SDK to generate a hash:
...ANSWER
Answered 2021-Mar-13 at 12:47I was missing camel case on the keyStart prop.
QUESTION
I am trying to get a multimachine network of Hyperledger Fabric running. I encountered some errors. I was able to reproduce the same errors on a single machine in the Fabcar example of Fabric v2.1 by changing one line in fabric-samples/fabcar/javascript/query.js
. I changed the line
ANSWER
Answered 2020-Oct-23 at 10:08In the single machine case your client application is running on your local machine but the nodes (peers and orderers) are running in Docker containers on your local machine, and have hostnames like peer0.org1.example.com
.
Within the Docker network the nodes can talk to each other using their hostnames, e.g. peer0.org1.example.com
. Your client (outside the Docker network) can't talk to peer0.org1.example.com
because that DNS name does not exist. Instead it needs to connect to localhost on ports mapped (by Docker) to/from specific hosts/ports within the Docker network.
Your client application gets node endpoints in two ways:
- Entries in its local connection profile.
- Network topology returned by service discovery.
You can set appropriate (localhost) endpoint URLs in your connection profile. However, the endpoint URLs returned by discovery will be the ones exposed within the Docker network, e.g. peer0.org1.example.com
. To facilitate this scenario, the SDK provides the discovery.asLocalhost
setting which, when enabled, maps all endpoint addresses returned by discovery to the same port at localhost. An alternative approach is to add entries to your local hosts file that map the node names to localhost.
You should not have the discovery.asLocalhost
setting enabled if your nodes are accessible on the real network using their configured hostnames. These hostnames must be resolvable in DNS (so for a real deployment you can't use non-resolvable addresses like example.com
), and must match your Fabric network configuration (and server certificate details if using TLS).
QUESTION
My question is related to docker-compose, I need to create a new docker-compose.yml file only for this purpose: to run 3 docker build commands:
...ANSWER
Answered 2020-Jun-26 at 12:29For example: Let us assume, this is the content of the DockerFile you are having. Aliases are given as base
, dev
and prod
.
QUESTION
I am trying to connect to a WebSocket address (for e.g. 'wss://mycompany.com') using nodeJS websocket client: https://github.com/websockets/ws. I am successfully able to test the connection in a browser using MDN's WebSocket API but getting the following connection error when using nodeJS WebSocket client:
...ANSWER
Answered 2020-Jun-09 at 08:35The unexpected server response 403 error is due to the fact that the server recognizes the connection request but fails to authorize it and doesn't allow connection. The connection was being rejected by the server as no origin header was set. The docs of NodeJS WebSocket describe it as:
If
verifyClient
is not set then the handshake is automatically accepted. If it is provided with a single argument then that is:info {Object}
origin {String} The value in the Origin header indicated by the client.
req {http.IncomingMessage} The client HTTP GET request.
secure {Boolean} true if req.connection.authorized or req.connection.encrypted is set.
For the part of setting origin properly, you can look at How to set WebSocket Origin Header from Javascript?
QUESTION
I use fabric-node-sdk 1.4 to make an API server with Fabric 1.4.4 on local It works normally. But when using with service blockchain on AWS, get error:
error: [Remote.js]: Error: Failed to connect before the deadline URL:grpcs:.......
So I'm not sure because on AWS is fabric version 1.2 or not. (or is there a way to test ping URL:grpcs:?)
...ANSWER
Answered 2020-May-19 at 02:08I solved, I fix the connection profile. I can conclude that fabric-node-sdk 1.4 can be used with fabric 1.2.
QUESTION
I have a Firebase Cloud Function that calls IBM Watson to get a token. I'm updating it from the old username/password auth to the current IAM auth.
Here's the code from the IBM documentation:
...ANSWER
Answered 2020-Mar-12 at 16:08This is as expected. If you take a look at the GitHub repo for ibm-watson
- https://github.com/watson-developer-cloud/node-sdk - you will notice that there is no example requiring the top level library. This stops you from pulling in the full library, when you only need to pull in a small sub-component.
QUESTION
I am trying to use the IBM blockchain. I have created the setup on IBM blockchain, now I am trying to register the user though node-SDK from on the IBM blockchain, however, I am getting an issue when I am trying to register the app-admin to IBM blockchain.
Please help me to find out the issue or let me know where I am doing wrong.
Connection file.
...ANSWER
Answered 2020-Jan-29 at 08:42The value of the mspid you are passing in to createIdentity
is blank. In your config you define the msp id as
QUESTION
When I try to create a channel, I got an error like below:
implicit policy evaluation failed - 0 sub-policies were satisfied, but this policy requires 1 of the 'Writers' sub-policies to be satisfied: permission denied
As the error message said, it seems like that I'm using wrong identity to sign the transaction to create a channel. However, I cannot find any mistake about the channel configuration or the identity registration & enrollment.
My channel config for the organization is:
...ANSWER
Answered 2020-Jan-14 at 21:10Writers
policy
The admin was actually correctly set up, or else the orderer would complain about the Admins
policy not being satisfied. What has happened is that the orderer has accepted the request and created the genesis block for the channel. It then proceeds to set up a handler to broadcast future blocks for that channel, and in doing so it verifies that its certificate satisfies the /Channel/Writers
policy, which is required to call the Broadcast API.
The mentioned policy is by default an of type ImplicitMeta
, which means it should be satisfied via /Channel/Orderer//Writers
. Because the error message states that only 1 sub-policy needs to be satisfied (i.e. ANY Writers
), it means your orderer's certificate does not meet up to its own organization's Writers policy. You need to add the OU type for an orderer to the rule, or set it to member
to allow any certificate in the org to act as writer:
QUESTION
I am using the "aws-sdk:^2.576.0" and "amazon-qldb-driver-nodejs:0.1.0-preview.2", and following the node-sdk's sample code for qldb. I am calling the node-sdk functions via the REST APIs exposed.
So for the read table operation, i.e., SELECT *
query (scanTable
from the sample code), following is the latency breakdown:
I'm getting a new session for every transaction from the session pool using pooledQldbDriver.getSession()
and have a decent internet connection of nearly 100mbps.
Is this much latency expected? Am I doing something wrong, and how can it be reduced further?
...ANSWER
Answered 2019-Dec-16 at 22:35(As per the comments in your question.)
Right now you're measuring the latency between India and us-west-2, not the latency of QLDB operations. Please use a region that has lower latency (https://docs.aws.amazon.com/general/latest/gr/qldb.html) or rely on the server-side metrics that you should be able to find in the CloudWatch console.
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