@threefold/grid_rmb_server

Twin server

Twin server is an RMB server that exposes the functionality of the grid client over RMB.

Prerequisites

• Redis server
• rmb-peer should be installed and running

Installation

External Package

yarn add @threefold/grid_rmb_server

Local Usage

• Clone the repository

git clone https://github.com/threefoldtech/tfgrid-sdk-ts.git

• Install it

yarn install

Configuration

Add network and account's mnemonics in config.json in server directory before running the server.

{
  "network": "<network environment dev, qa or test>",
  "mnemonic": "<your account mnemonics>",
  "storeSecret": "secret", // secret used for encrypting/decrypting the values in tfkvStore
  "keypairType": "sr25519" // keypair type for the account created on substrate
}

Life cycle

• User from the outside sends an execution request(command with payload) to the RMB server.
• RMB server puts this request in Redis.
• Twin server checks if there is an execution request that its command is registered on the Twin server.
• If this command is registered, the Twin server will pick up this request.
• Twin server starts to execute it using the Grid3 client.
• After finishing the execution, the Twin server puts the result back to Redis.
• RMB keeps checking for the result is ready, and sends it back to the user once it's ready.

Running

Locally

yarn start

In External Package

yarn grid_rmb_server

You can also use another configuration file by using --config or -c option.

 yarn grid_rmb_server -c pathToConfigFile.json
 # or
 yarn grid_rmb_server --config pathToConfigFile.json

Usage

This is an example of getting user's contracts. Put the following content in a file test_contracts.ts

import { MessageBusClient } from "@threefold/rmb_peer_client";

async function main() {
  const myTwinId = 26;
  const cmd = "twinserver.contracts.listContractsByTwinId";
  const payload = JSON.stringify({ twinId: 26 });
  const rmb = new MessageBusClient();
  const requestId = await rmb.send(cmd, payload, myTwinId, 1);
  const result = await rmb.read(requestId, 1);
  console.log(result);
  rmb.disconnect();
}
main();

And then run this file by yarn run ts-node test_contracts.ts

see more examples in modules