@moonbeam-network/xcm-sdk

The Moonbeam XCM SDK enables developers to easily deposit and withdraw assets to Moonbeam/Moonriver from the relay chain and other parachains in the Polkadot/Kusama ecosystem. With the SDK, you don't need to worry about determining the multilocation of the origin or destination assets or which extrinsics are used on which networks to send XCM transfers. To deposit or withdraw assets, you simply define the asset and origin chain you want to deposit from or withdraw back to, along with the sending account's signer, and the amount to send.

Documentation

• usage
• references

Installation

npm i @moonbeam-network/xcm-config @moonbeam-network/xcm-sdk

Usage

Init

import { init } from '@moonbeam-network/xcm-sdk';

const { moonbeam } = init();

// Optionally you can provide signers or do it on get()
const { moonbeam } = init({
  ethersSigner,
  polkadotSigner,
});

Accounts

const moonbeamAddress = '0xeF46c7649270C912704fB09B75097f6E32208b85';
const substrateAddress = '5DG5Fn3ww3KPza1RLoap6QJNzQfEvRebxypDGp35YuMX5y2K';

Deposit

// moonbeam.symbols is a list of asset symbols that you can deposit/withdraw
// chains is a list of chains from which you can deposit asset
const { chains, from } = moonbeam.deposit(moonbeam.symbols[0]);

const { min, send } = await from(chains[0]).get(
  moonbeamAddress,
  substrateAddress,
  // if you haven't provided on init
  { polkadotSigner },
);

await send(min, (event) => console.log(event));

Withdraw

const { chains, to } = moonbeam.withdraw(moonbeam.symbols[0]);

const { min, send } = await to(chains[0]).get(
  substrateAddress,
  // if you haven't provided on init
  { ethersSigner },
);

await send(min, (event) => console.log(event));

Get balances

const unsubscribe = await moonbeam.subscribeToAssetsBalanceInfo(
  moonbeamAddress,
  (balances) => {
    balances.forEach(({ asset, balance, origin }) => {
      // xcDOT: 0.073742 (Polkadot DOT)
      // ...
      console.log(
        `${balance.symbol}: ${toDecimal(balance.balance, balance.decimals)} (${
          origin.name
        } ${asset.originSymbol})`,
      );
    });
  },
);

unsubscribe();

Examples

• simple

git clone [e-mail]:PureStake/xcm-sdk.git
cd packages/sdk/examples/simple/
npm i

# edit index.ts by adding your accounts

npm start

Tests

Unit tests

npm run test

Acceptance tests

cp .env.example .env
# add private key and suri to .env file

npm run test:acc