Developers
Typescript SDK
Getting started

MixFetch

Use the mixFetch (opens in a new tab) package as a drop-in replacement for fetchto send HTTP requests over the Nym mixnet:

import { mixFetch } from '@nymproject/mix-fetch';
 
// HTTP GET
const response = await mixFetch('https://nymtech.net');
const html = await response.text();
 
// HTTP POST
const apiResponse = await mixFetch('https://api.example.com', {
  method: 'POST',
  body: JSON.stringify({ foo: 'bar' }),
  headers: { [`Content-Type`]: 'application/json', Authorization: `Bearer ${AUTH_TOKEN}` }
});

Mixnet Client

After instantiating the Mixnet Client (opens in a new tab), you can use it and send messages to yourself and output them in the console by following these steps:

import { createNymMixnetClient } from '@nymproject/sdk';
 
const main = async () => {
  const nym = await createNymMixnetClient();
 
  const nymApiUrl = 'https://validator.nymtech.net/api';
 
  // Show message payload content when received
  nym.events.subscribeToTextMessageReceivedEvent((e) => {
    console.log('Got a message: ', e.args.payload);
  });
 
  // Start the client and connect to a gateway
  await nym.client.start({
    clientId: 'My awesome client',
    nymApiUrl,
  });
 
  // Stop the client connection
  const stop = async () => {
    await nym?.client.stop();
  };
 
  // Send a message to yourself
  const payload = 'Hello mixnet';
  const recipient = nym.client.selfAddress();
  nym.client.send({ payload, recipient });
 
};

Nym Smart Contracts

After having installed your client from the Contract Clients (opens in a new tab) to query any of the Nym smart contracts, you can import the packages and execute some methods, signing them with a mnemonic:

import { contracts } from '@nymproject/contract-clients';
import { SigningCosmWasmClient } from "@cosmjs/cosmwasm-stargate";
import { DirectSecp256k1HdWallet } from "@cosmjs/proto-signing";
 
async function main() {
  // Generate a signer from a mnemonic
  const signer = await DirectSecp256k1HdWallet.fromMnemonic("...");
  const accounts = await signer.getAccounts();
 
  // Make a signing client for the Nym Mixnet contract on mainnet
  const cosmWasmSigningClient = await SigningCosmWasmClient.connectWithSigner("https://rpc.nymtech.net:443", signer);
  const client = new contracts.Mixnet.MixnetClient(cosmWasmSigningClient, accounts[0].address, 'n17srjznxl9dvzdkpwpw24gg668wc73val88a6m5ajg6ankwvz9wtst0cznr');
 
  // Delegate 1 NYM to mixnode with id 100
  const result = await client.delegateToMixnode({ mixId: 100 }, 'auto', undefined, [{ amount: `${1_000_000}`, denom: 'unym' }]);
 
  console.log(`Tx Hash = ${result.transactionHash}`);
};
Installation1. mixFetch