Internal error, please report (0x6f01) and Invalid Signature

[blockchainguyy]

I was receiving Errors while using signatures produced by signP2SHTransaction function of @ledgerhq/hw-app-btc. So I created a script using bitcore-lib to cross check it against the signature produced by Ledger and pinpoint the change causing the Error. I also verified all my input params and found them to be correct.

I will detail both scripts here, though I think it is an issue of ledger's signP2SHTransaction function.

I'm using the following dependencies and node v8.9.3:

 "@ledgerhq/hw-app-btc": "^4.17.0",
    "@ledgerhq/hw-app-eth": "^4.19.0",
    "@ledgerhq/hw-transport-node-hid": "^4.18.0",
    "babel-runtime": "^6.26.0",
    "bip32": "^0.1.0",
    "bitcoinjs-lib": "^3.3.2",
    "bitcore-lib": "^0.15.0"

I have created a 2 of 2 Multisig address using the following 2 paths of my ledger- 44'/0'/0'/0/0, 44'/0'/0'/0/1. I used the following rawTx:

0100000001917f0f1321da9d0f44806a3d6dfa15063b1b83a30e582f61ea6324b1db36a71c020000004900475221028ef85ec7646df8744eac5c0499eefc794ccd6479f6e4ed089907f6440474bc572103ed25b9cf381feaa222c9a50dfe4d0ca4c983d67762b7d042bb45de91d15b3da952aeffffffff02393000000000000017a9145d2cf0d68efd203d4f1d3b1b7c2a7cfe72a6b73f8755af71010000000017a9145d2cf0d68efd203d4f1d3b1b7c2a7cfe72a6b73f8700000000

I used the following Redeem Script:

5221028ef85ec7646df8744eac5c0499eefc794ccd6479f6e4ed089907f6440474bc572103ed25b9cf381feaa222c9a50dfe4d0ca4c983d67762b7d042bb45de91d15b3da952ae

Here's the code I used to produce it:

const bitcore = require("bitcore-lib");
const PublicKey = bitcore.PublicKey;
const Script = bitcore.Script;

var publicKey1 = new PublicKey(
  "02a9d50f9817a9cf20f3feb7ad4038e88c8bd471e90dfba3a80c2e0bfd79c89312"
); // public key for path- 44'/0'/0'/0/0

var publicKey = new PublicKey(
  "02faf805ea3652cec322dda6f7571d926f359d8abbd73af1512924151edbec90e7"
); // public key for path- 44'/0'/0'/0/1

var pubkeys = [publicKey, publicKey1];

var redeemScript = Script.buildMultisigOut(pubkeys, 2);

console.log(redeemScript.toHex());

You can decode it here: https://live.blockcypher.com/btc/decodetx/ Here is my ledger's code which is creating a signature for 48'/0'/0'/69/0/0 path:

const TransportHid = require("@ledgerhq/hw-transport-node-hid").default;
const AppBtc = require("@ledgerhq/hw-app-btc").default;

TransportHid.create()
  .then(async transport => {
    if (!transport) return console.log("err: Unable to establish connection");
    var btc = new AppBtc(transport);

    const rawTx = "0100000001917f0f1321da9d0f44806a3d6dfa15063b1b83a30e582f61ea6324b1db36a71c020000004900475221028ef85ec7646df8744eac5c0499eefc794ccd6479f6e4ed089907f6440474bc572103ed25b9cf381feaa222c9a50dfe4d0ca4c983d67762b7d042bb45de91d15b3da952aeffffffff02393000000000000017a9145d2cf0d68efd203d4f1d3b1b7c2a7cfe72a6b73f8755af71010000000017a9145d2cf0d68efd203d4f1d3b1b7c2a7cfe72a6b73f8700000000";
    const redeemHex =
      "5221028ef85ec7646df8744eac5c0499eefc794ccd6479f6e4ed089907f6440474bc572103ed25b9cf381feaa222c9a50dfe4d0ca4c983d67762b7d042bb45de91d15b3da952ae";
    const bufferedData = await btc.splitTransaction(rawTx);

    const data = 
        [{
            transaction_hash: "4a3081d782fe84d95d6e353a665bf7677cba90c2002436d169e2a30a85cc3303",
            hex:"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"
        }];
        let tx = btc.splitTransaction(
            data[0].hex,
            true,
            undefined
        );
    txs.push(tx);
    indexes.push(1);
    redeemScripts.push(
        redeemHex
    );
    const inputs = _.zip(txs, indexes, redeemScripts);
    const outputScript = btc
      .serializeTransactionOutputs(bufferedData)
      .toString("hex");

    console.log("\nOutput script hex:", outputScript);

    const accountIndex = 69;

    console.log("\npath:", `48'/0'/0'/${accountIndex}/0/0`);

    await btc
      .signP2SHTransaction(
        inputs,
        [`44'/0'/0'/0/${accountIndex}/0/0`],
        outputScript,
         undefined,
        undefined,
        segwit
      )
      .then(sig => console.log("\n\nSig hash:", sig))
      .catch(err => console.log("\n\nErr:", err));
  })
  .catch(err => console.log(err));

So as I am using the above code when I toggle to segwit as true in calling Ledger P2SH function signP2SHTransaction. The ledger device accepts the provided input data and produces the invalid signature.

When I toggle to segwit as false in calling Ledger P2SH function signP2SHTransaction. The ledger device throws this error:

TransportStatusError: Ledger device: Internal error, please report (0x6faa)

While my its legacy transaction so It must run without setting segwit to true. So could you please suggest what might be the problem.

[kantai]

I also experienced this issue, while working with ledgerjs -- and I think the issue lies there, not in the hw app. The transaction preparing code in @ledgerhq/hw-app-btc assumes that non-segwit signing transactions won't have inputs which are segwit.

[monokh]

Have this exact issue as well, did you find any resolution @kantai @ayush-techracers? Seems odd that this means you can only include pure legacy utxos in a legacy transaction. Can see this issue being very common.