app.js

/*
 * A simple application utilizing the Node.js Client SDK to:
 * 1) Enroll a user
 * 2) User deploys chaincode
 * 3) User queries chaincode
 */
// "HFC" stands for "Hyperledger Fabric Client"
// when hfc package is not global
//var hfc = require('/opt/gopath/src/github.com/hyperledger/fabric/sdk/node');

// when the hfc has been installed globally
var hfc = require("hfc");

// get the addresses from the docker-compose environment
var PEER_ADDRESS         = process.env.PEER_ADDRESS;
var MEMBERSRVC_ADDRESS   = process.env.MEMBERSRVC_ADDRESS;

var chain, user, chaincodeID;

// Create a chain object used to interact with the chain.
// You can name it anything you want as it is only used by client.
chain = hfc.newChain("mychain");
// Initialize the place to store sensitive private key information
chain.setKeyValStore( hfc.newFileKeyValStore('/tmp/keyValStore') );
// Set the URL to membership services and to the peer
chain.setMemberServicesUrl("grpc://"+MEMBERSRVC_ADDRESS);
chain.addPeer("grpc://"+PEER_ADDRESS);

// The following is required when the peer is started in dev mode
// (i.e. with the '--peer-chaincodedev' option)
var mode =  process.env['DEPLOY_MODE'];
console.log("$DEPLOY_MODE: " + mode);
if (mode === 'dev') {
    chain.setDevMode(true);
} else {
    chain.setDevMode(false);
}

//Deploy might take some time
chain.setDeployWaitTime(30);
chain.setInvokeWaitTime(10);

// Begin by enrolling the user
enroll();

// Enroll a user.
function enroll() {
   console.log("enrolling user admin ...");
   // Enroll "admin" which is preregistered in the membersrvc.yaml
   chain.enroll("admin", "Xurw3yU9zI0l", function(err, admin) {
      if (err) {
         console.log("ERROR: failed to register admin: %s",err);
         process.exit(1);
      }
      user = admin;
      deploy();
   });
}

// Deploy chaincode
function deploy() {
   console.log("deploying chaincode; please wait ...");
   // Construct the deploy request
   var deployRequest = {
       chaincodeName: 'mycc',
       fcn: "init",
       args: ["a", "100", "b", "200"]
   };
   // where is the chain code
   deployRequest.chaincodePath = "github.com/hyperledger/fabric/examples/chaincode/go/chaincode_example02";

   // Issue the deploy request and listen for events
   var tx = user.deploy(deployRequest);
   tx.on('complete', function(results) {
       // Deploy request completed successfully
       console.log("deploy complete; results: %j",results);
       // Set the testChaincodeID for subsequent tests
       chaincodeID = results.chaincodeID;
       query();
   });
   tx.on('error', function(err) {
       console.log("Failed to deploy chaincode: request=%j, error=%k",deployRequest,err);
       process.exit(1);
   });

}

// Query chaincode
function query() {
   console.log("querying chaincode ...");
   // Construct a query request
   var req = {
      chaincodeID: chaincodeID,
      fcn: "query",
      args: ["a"]
   };
   // Issue the query request and listen for events
   var tx = user.query(req);
   tx.on('complete', function (results) {
      console.log("query completed successfully; results=%j",results);
      process.exit(0);
   });
   tx.on('error', function (err) {
      console.log("Failed to query chaincode: request=%j, error=%k",req,err);
      process.exit(1);
   });
}