Setup Node.js for WYFA Tests

Q

How to Setup Node.js for WYFA (Write Your First Application) Tests?

✍: FYIcenter.com

A

Before performing any Node.js SDK tests on the WYFA network, you need to setup the Node.js on your local host.

1. Make sure Node.js is installed:

$ node --version
v8.10.0

2. Install required packages:

$ cd hyperledger-binaries/fabric-samples

$ cd fabcar/javascript

$ sudo npm install

> pkcs11js@1.0.17 install /home/fyicenter/hyperledger-binaries/fabric-samples/fabcar/javascript/node_modules/pkcs11js
> node-gyp rebuild

gyp ERR! configure error
gyp ERR! stack Error: EACCES: permission denied, mkdir \
   '/home/fyicenter/hyperledger-binaries/fabric-samples/fabcar/javascript/node_modules/pkcs11js/build'
gyp ERR! System Linux 4.15.0-1037-azure
gyp ERR! command "/usr/bin/node" "/usr/local/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /home/fyicenter/hyperledger-binaries/fabric-samples/fabcar/javascript/node_modules/pkcs11js
gyp ERR! node -v v8.10.0
gyp ERR! node-gyp -v v3.8.0
gyp ERR! not ok
npm WARN fabcar@1.0.0 No repository field.

Looks like there is a problem with the pkcs11js directory.

3. Create the failed directory manually and try it again:

$ sudo mkdir -p node_modules/pkcs11js/build

$ sudo npm install
...
gyp ERR! configure error
gyp ERR! stack Error: EACCES: permission denied, mkdir \
   '/home/fyicenter/hyperledger-binaries/fabric-samples/fabcar\
   /javascript/node_modules/fabric-client/node_modules/pkcs11js/build'

4. Create the failed directory manually and try it again:

$ sudo mkdir -p node_modules/fabric-client/node_modules/pkcs11js/build

$ sudo npm install
gyp ERR! configure error
gyp ERR! stack Error: EACCES: permission denied, mkdir \
   '/home/fyicenter/hyperledger-binaries/fabric-samples/fabcar\
   /javascript/node_modules/fabric-network/node_modules/pkcs11js/build'

5. Create the failed directory manually and try it again:

$ sudo mkdir -p node_modules/fabric-network/node_modules/pkcs11js/build

$ sudo npm install
gyp ERR! configure error
gyp ERR! stack Error: EACCES: permission denied, mkdir \
   '/home/fyicenter/hyperledger-binaries/fabric-samples/fabcar\
   /javascript/node_modules/fabric-network/node_modules/pkcs11js/build'

It failed again with the same directory. So "npm install" command just deleted the directory and not able to re-create it.

See next tutorial on how to resolve the issue.

Â

â‡’ Reinstall npm with Node Version Manager

â‡ blockfile_000000 - Blockfiles of Blockchain

â‡‘ WYFA (Writing Your First Application)

â‡‘â‡‘ Hyperledger Tutorials

2020-02-07, 910👍, 0💬

Read Block Data in Blockchain
How to Read Block Data from a Blockchain? The block data from a blockchain uses a binary format. You need to use the "configtxgen -inspectBlock" command parse it to JSON format. 1. Get the newest block from the blockchain: $ docker exec -it cli bash root@262918fdcbc0:/opt/gopath/ src/github.com/hyper... 2020-02-20, 1184👍, 0💬

Two-Organization Hyperledger Fabric Network
What is the simplest Hyperledger Fabric Network for two organizations? The simplest Hyperledger Fabric Network for two organizations consists of 3 systems: an orderer and a peer managed by first organization, and another peer managed by the second organization. If the second organization does not fu... 2020-01-29, 1097👍, 0💬

Node.js SDK and Client Application
What is Node.js SDK and how to use it to write client applications? Hyperledger Fabric Node.js SDK is a set of libraries that allows you to write client applications to interact with chaincode in Node.js language. A Hyperledger Fabric network can be viewed as virtual operating system. Once it is up ... 2020-02-07, 1023👍, 0💬

Simplest Hyperledger Fabric Network
What is the simplest Hyperledger Fabric Network? The simplest Hyperledger Fabric Network consists of 2 systems, an orderer and a peer, running 1 channel with 1 chaincode. But ledger (Blockchain and World State) is not distributed. To improve reliability, we can add a second ledger peer to the networ... 2020-02-07, 1019👍, 0💬

Multiple Ledger Peers within Organization
Can I run multiple ledger peers in my organization on a multi-organization network? Yes, you can run multiple ledger peers in your organization on a multi-organization network. This will make the network more reliable to serve client applications of your organization. You can also replace the third ... 2020-01-29, 922👍, 0💬

Setup Node.js for WYFA Tests
How to Setup Node.js for WYFA (Write Your First Application) Tests? Before performing any Node.js SDK tests on the WYFA network, you need to setup the Node.js on your local host. 1. Make sure Node.js is installed: $ node --version v8.10.0 2. Install required packages: $ cd hyperledger-binaries/fabri... 2020-02-07, 911👍, 0💬

Verify Blockchain on the Channel
How to Verify Blockchain on the Channel? Since all transactions (changes of assets managed by chaincodes) are stored in the blockchain shared by all peers of the channel, you can use the "peer channel" CLI command to look at them. 1. Connect to CLI container: $ docker exec -it cli bash root@262918fd... 2020-02-20, 901👍, 0💬

Hyperledger Fabric Network
Where to find tutorials on Hyperledger Fabric Network? Here is a list of tutorials to answer many frequently asked questions compiled by FYIcenter.com team on Hyperledger Fabric Network. Simplest Hyperledger Fabric Network Two-Organization Hyperledger Fabric Network Multiple Ledger Peers within Orga... 2020-02-07, 832👍, 0💬

Verify World State in CouchDB
How to Verify World State in CouchDB container? Since peer0.org1.example.com uses the couchdb container to store the world state, you can check the current states of all assets managed by the chaincode. 1. Get database name for the chaincode "fabcar": $ curl http://localhost:5984/_all_dbs ["_replica... 2020-02-20, 805👍, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.