transfer-pha-from-ethereum-to-karura.js

require('dotenv').config();

const { ApiPromise, WsProvider, Keyring } = require('@polkadot/api');
const { blake2AsU8a } = require('@polkadot/util-crypto');
const BN = require('bn.js');
const ethers = require('ethers');
const BridgeJson = require('./Bridge.json');

const bn1e18 = new BN(10).pow(new BN(18));
const khalaParaId = 2004;
const karuraParaId = 2000;
const bridgeAddressOnRinkeby = '0x0712Cf53B9fA1A33018d180a4AbcC7f1803F55f4';

async function transferPhaFromEthereumToKarura(khalaApi, bridge, sender, recipient, amount) {
    let khalaChainId = 1;
    let phaResourceId = '0x00e6dfb61a2fb903df487c401663825643bb825d41695e63df8af6162ab145a6';
    let dest = khalaApi.createType('XcmV1MultiLocation', {
        // parents = 1 means we wanna send to other parachains or relaychain
        parents: 1,
        interior: khalaApi.createType('Junctions', {
            X2: [
                khalaApi.createType('XcmV1Junction', {
                    Parachain: khalaApi.createType('Compact<U32>', karuraParaId)
                }),
                khalaApi.createType('XcmV1Junction', {
                    AccountId32: {
                        network: khalaApi.createType('XcmV0JunctionNetworkId', 'Any'),
                        id: recipient,
                    }
                }),
            ]
        })
    }).toHex();
    let data = '0x' +
        ethers.utils.hexZeroPad(ethers.BigNumber.from(amount.toString()).toHexString(), 32).substr(2) +
        ethers.utils.hexZeroPad(ethers.utils.hexlify((dest.length - 2) / 2), 32).substr(2) +
        dest.substr(2);

    await bridge.deposit(khalaChainId, phaResourceId, data);
}

async function main() {
    // Create khala api
    const khalaEndpoint = process.env.ENDPOINT || 'ws://127.0.0.1:9944';
    const khalaProvider = new WsProvider(khalaEndpoint);
    const khalaApi = await ApiPromise.create({
        provider: khalaProvider,
    });

    // Replace it with your owns, make sure private key used to sign transaction matchs address
    const evmSender = "0xA29D4E0F035cb50C0d78c8CeBb56Ca292616Ab20";

    let privateKey = process.env.KEY;
    let provider = new ethers.providers.JsonRpcProvider('https://rinkeby.infura.io/v3/<project id>');
    let ethereumWallet = new ethers.Wallet(privateKey, provider);
    let bridge = new ethers.Contract(bridgeAddressOnMoonriver, BridgeJson.abi, ethereumWallet);
    // Public key of the substrate account
    const recipient = '0xd43593c715fdd31c61141abd04a99fd6822c8558854ccde39a5684e7a56da27d';
    await transferPhaFromEthereumToKarura(khalaApi, bridge, evmSender, recipient, bn1e18.mul(new BN(100)));
}

main().catch(console.error).finally(() => process.exit());