const grpc = require('@grpc/grpc-js'); const protoLoader = require('@grpc/proto-loader'); const packageDefinition = protoLoader.loadSync('blockchain.proto', {}); const blockchainProto = grpc.loadPackageDefinition(packageDefinition).blockchain; const client = new blockchainProto.BlockchainService( 'localhost:50051', grpc.credentials.createInsecure() ); module.exports = client;