CW20 IBC transfer

send_packets.js

#!/usr/bin/env node
/*jshint esversion: 8 */

/* eslint-disable @typescript-eslint/naming-convention */
const { toBase64, toUtf8 } = require('@cosmjs/encoding');
const axios = require('axios');

const { SigningCosmWasmClient } = require('@cosmjs/cosmwasm-stargate');
const { GasPrice } = require('@cosmjs/stargate');
const { DirectSecp256k1HdWallet } = require('@cosmjs/proto-signing');

const config = {
    endpoint: 'https://rpc-juno.itastakers.com:443',
    bech32prefix: 'juno',
    feeDenom: 'ujuno',
    gasPrice: GasPrice.fromString('0.003ujuno'),
    mnemonic: 'PUT YOUR MNEMONIC HERE',
};

async function setup() {
    const wallet = await DirectSecp256k1HdWallet.fromMnemonic(config.mnemonic, {
        prefix: config.bech32prefix,
    });
    const { address } = (await wallet.getAccounts())[0];
    const options = {
        prefix: config.bech32prefix,
        gasPrice: config.gasPrice,
    };
    const client = await SigningCosmWasmClient.connectWithSigner(
        config.endpoint,
        wallet,
        options
    );

    // now ensure there is a balance
    console.log(`Querying balance of ${address}`);
    const {denom, amount} = await client.getBalance(address, config.feeDenom);
    console.log(`Got ${amount} ${denom}`);
    if (!amount || amount === "0") {
        console.log('Please add tokens to your account before uploading')
    }
  
    return { address, client };
}

const tokenAddr = "juno1y0y8rkzytel0htm86uknczrjeyzqzznuyqgs64fvk9k2zfnpw64qe7vmgj";
const ics20Addr = "juno1v4887y83d6g28puzvt8cl0f3cdhd3y6y9mpysnsp3k8krdm7l6jqgm0rkn";
const ibcPortId = "wasm.juno1v4887y83d6g28puzvt8cl0f3cdhd3y6y9mpysnsp3k8krdm7l6jqgm0rkn";

const junoChannel = "channel-47";

// TODO: put your osmosis address here
const osmosisAddr = "osmo1x95keq9l9y9p7hjdt6xd8wnknrpnjsqrtlxdss";

async function main() {
    const { address, client } = await setup();

    // send some native token over the channel
    console.log(`IBC over ${ibcPortId} / ${junoChannel}`);
    console.log(`Sending 0.017771 JUNO to ${osmosisAddr}`);

    const receiveMsg = {
        channel: junoChannel,
        remote_address: osmosisAddr,
        // give it 10 hours
        timeout: 36000,
    };
    await client.execute(
        address,
        ics20Addr,
        { transfer: receiveMsg },
        'auto',
        'Send Native token via contract',
        [{amount: "17771", denom: "ujuno"}],
      );


    // send some cw20 over the channel
    console.log(`Sending 456.789 TEST to ${osmosisAddr}`);
    const encoded = toBase64(toUtf8(JSON.stringify(receiveMsg)));
    const sendMsg = {
        send: {
          contract: ics20Addr,
          amount: '456789000', // leaving 123000.0000000 tokens
          msg: encoded,
        },
    };
    await client.execute(
        address,
        tokenAddr,
        sendMsg,
        'auto',
        'Send CW20 tokens via ICS20'
    );
}

main().then(
    () => {
      console.info('All done, let the coins flow.');
      process.exit(0);
    },
    (error) => {
      console.error(error);
      process.exit(1);
    }
  );