server.js

var init = function(){
  const grpc = require('@grpc/grpc-js');
  const protoLoader = require('@grpc/proto-loader');
  const PROTO_PATH = __dirname +'/salary.proto';

  const packageDefinition = protoLoader.loadSync(PROTO_PATH, {
    keepCase: true,
    longs: String,
    enums: String,
    defaults: true,
    oneofs: true,
    
  });

  let employee_proto = grpc.loadPackageDefinition(packageDefinition).employee;

  let { paySalary } = require('./pay_salary.js');

  function main() {
 
    let server = new grpc.Server();
    server.bindAsync('0.0.0.0:4500', grpc.ServerCredentials.createInsecure(),()=>{
      server.start();
    });
    server.addService(employee_proto.Employee.service, { paySalary: paySalary });

  }

  main();
  
}
exports.init = init;