import {HopPayload, HopPayloadType} from 'bolt04';

const payload = new HopPayload({
    type: HopPayloadType.Legacy,
    channel_id: Buffer.alloc(8, 10),
    amount_to_forward: 11,
    outgoing_cltv_value: 12
});

const payloadBuffer = payload.toSphinxBuffer();
console.log(payloadBuffer.toString('hex'));
// 000a0a0a0a0a0a0a0a000000000000000b0000000c000000000000000000000000

import {HopPayload, SharedSecret, Sphinx} from 'bolt04';

const sessionKey = Buffer.from('4141414141414141414141414141414141414141414141414141414141414141', 'hex');
const hopPublicKeys = [
    Buffer.from('02eec7245d6b7d2ccb30380bfbe2a3648cd7a942653f5aa340edcea1f283686619', 'hex'),
    Buffer.from('0324653eac434488002cc06bbfb7f10fe18991e35f9fe4302dbea6d2353dc0ab1c', 'hex'),
    Buffer.from('027f31ebc5462c1fdce1b737ecff52d37d75dea43ce11c74d25aa297165faa2007', 'hex'),
    Buffer.from('032c0b7cf95324a07d05398b240174dc0c2be444d96b159aa6c7f7b1e668680991', 'hex'),
    Buffer.from('02edabbd16b41c8371b92ef2f04c1185b4f03b6dcd52ba9b78d9d7c89c8f221145', 'hex')
];

const sharedSecrets = SharedSecret.calculateSharedSecrets({sessionKey, hopPublicKeys});

const payloads = [];
for (let i = 0; i < 5; i++) {
    const currentChannelId = Buffer.alloc(8, i);
    const currentPayload = new HopPayload({
        channel_id: currentChannelId,
        amount_to_forward: i,
        outgoing_cltv_value: i
    });
    payloads.push(currentPayload);
}

const associatedData = Buffer.from('4242424242424242424242424242424242424242424242424242424242424242', 'hex');
const onion = Sphinx.constructOnion({
    sharedSecrets, payloads, associatedData, firstHopPublicKey: hopPublicKeys[0]
});
console.log(onion.toBuffer().toString('hex')); // 0002eec7245d6b7…cff954949076dcf (see test/sphinx)

const onion = Buffer.from('0002eec7245d6b7…cff954949076dcf', 'hex'); // see test/sphinx
const sphinx = Sphinx.fromBuffer(onion);

// we need our private key and the associated data
const hopPrivateKey = Buffer.from('4141414141414141414141414141414141414141414141414141414141414141', 'hex');
const associatedData = Buffer.from('4242424242424242424242424242424242424242424242424242424242424242', 'hex');

const peel0 = sphinx.peel({hopPrivateKey: hopPrivateKey, associatedData});
const nextLayer = peel0.sphinx; // not null if we are not the final recipient, hence we can call nextLayer.peel()
console.log(nextLayer.toBuffer().toString('hex')); // 00028f9438bfbf7…cd4fe26a492d376

const hopPayload = peel0.hopPayload;
console.log(hopPayload.channelId.toString('hex')); // 0000000000000000
console.log(hopPayload.amountToForward); // 0n
console.log(hopPayload.outgoingCltvValue); // 0