LND: encoding/hex: invalid byte: U+004D

[Luca-Fischer]

I am running two lnd nodes local and execute some commands from react with the REST interface.

lnd.conf

[Application Options]
listen=0.0.0.0:11076
rpclisten=0.0.0.0:6076
restlisten=0.0.0.0:1076


[Bitcoin]
bitcoin.active=1
bitcoin.regtest=1
bitcoin.node=bitcoind

[Bitcoind]
bitcoind.rpchost=localhost
bitcoind.rpcuser=bitcoinrpc
bitcoind.rpcpass=NnwCXg1_B27q-84v0RnFQfd3iNIl75M-...
bitcoind.zmqpubrawblock=tcp://127.0.0.1:28332
bitcoind.zmqpubrawtx=tcp://127.0.0.1:28333

Other lnd.conf

[Application Options]
listen=0.0.0.0:11077
rpclisten=0.0.0.0:6077
restlisten=0.0.0.0:1077


[Bitcoin]
bitcoin.active=1
bitcoin.regtest=1
bitcoin.node=bitcoind

[Bitcoind]
bitcoind.rpchost=localhost
bitcoind.rpcuser=bitcoinrpc
bitcoind.rpcpass=NnwCXg1_B27q-84v0RnFQfd3iNIl75M-E-...
bitcoind.zmqpubrawblock=tcp://127.0.0.1:28332
bitcoind.zmqpubrawtx=tcp://127.0.0.1:28333

From the second one, I try to connect to the first lnd.conf.

app.post("/connectpeer", (req, res) => {
    const decodedBytes = Buffer.from(req.body.pub_key, "hex");
  const base64String = Buffer.from(decodedBytes).toString("base64"); //req.body.pub_key=0296b505f1cf25bfeec8a66c20782fdd141db26b492fa764193759b5e51b0067ca from the first lnd.conf. got the info from lncli getinfo
  const host = req.body.host + ":" + req.body.port;
  const MACAROON_PATH =
    "/Users/lucafischer/Library/Application Support/lnd1077/data/chain/bitcoin/regtest/admin.macaroon";

  const addr = {
    pubkey: base64String,
    host: host,
  };
  console.log(addr);

  let requestBody = {
    addr: addr,
   // perm: true,
  };
  let options = {
    url: `https://localhost:1077/v1/peers`,
    rejectUnauthorized: false,
    json: true,
    headers: {
      "Grpc-Metadata-macaroon": fs.readFileSync(MACAROON_PATH).toString("hex"),
    },
    form: JSON.stringify(requestBody),
  };
  request.post(options, function (error, response, body) {
    console.log(error);
    console.log(body);
  });
});

The input is correct in the console:

{
  pubkey: 'MDI5NmI1MDVmMWNmMjViZmVlYzhhNjZjMjA3ODJmZGQxNDFkYjI2YjQ5MmZhNzY0MTkzNzU5YjVlNTFiMDA2N2Nh',
  host: '0.0.0.0:1076'
}

{
  code: 2,
  message: "encoding/hex: invalid byte: U+004D 'M'",
  details: []
}

I have no clue what that means and find nothing.
All I found out was an issue with the encoding ...

Thanks for any help :)

[guggero]

You first need to hex decode the pubkey to raw bytes before base64 encoding it.

[Luca-Fischer]

Thanks so far. I updated the code. now I get:

{
  code: 2,
  message: "encoding/hex: invalid byte: U+0070 'p'",
  details: []
}

{
  pubkey: 'Apa1BfHPJb/uyKZsIHgv3RQdsmtJL6dkGTdZteUbAGfK',
  host: 'https://127.0.0.1:1076'
}

Some more informations.
I use initWallet to create the wallet for a new lnd. Therefore I use genseed to create the 24-word seedphrase.
Pay some btc to newaddress.
Get the pubkey for the other connection of the peer with getinfo.

[Luca-Fischer]

If I try using the pub_key from the getInfo response directly I get

{ code: 2, message: 'EOF', details: [] }

In the terminal of the node I want to connect with:

http: TLS handshake error from 127.0.0.1:50282: tls: first record does not look like a TLS handshake

But there is no way to tell to use the .cert files like --rpcserver in terminal?

[Luca-Fischer]

Got it .....
Even though I made a REST call, I had to call the port from listen=... not restlisten=.....
Thanks