How can I sign tx for opt in of ASAs for a contract address without using private key, just with logicsig program?

AlgoSDK
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1 
// const fs = require('fs');
// const path = require('path');
const algosdk = require('..');

const server = 'https://testnet-algorand.api.purestake.io/ps2';
const port = '';
const token = {
  'x-api-key': 'B3SU4KcVKi94Jap2VXkK83xx38bsv95K5UZm2lab', // fill in yours
};

// const bobmnemonic = 'curious duck pet daughter setup pretty surface saddle arm neck side guard alter tree turtle release shoe vivid power solid trim escape snack above page'; // fill in yours
// const bobAccount = algosdk.mnemonicToSecretKey(bobmnemonic);

const client = new algosdk.Algodv2(token, server, port);

(async () => {
  const program = 'int 1';
  const compiledProgram = await client.compile(program).do();
  const programBytes = new Uint8Array(
    Buffer.from(compiledProgram.result, 'base64')
  );

  // create a logic signature
  const lsig = algosdk.makeLogicSig(programBytes);
  const lsigaddr = lsig.address();
  console.log(lsigaddr);

  const assetID = 12400859; // change to your own assetID
  const params = await client.getTransactionParams().do();
  const sender = lsigaddr;
  const recipient = lsigaddr;
  const revocationTarget = undefined;
  const closeRemainderTo = undefined;
  const note = new Uint8Array(Buffer.from('Hello World', 'utf8'));
  const amount = 0;
  // signing and sending "txn" allows sender to begin accepting asset specified by creator and index
  const opttxn = algosdk.makeAssetTransferTxnWithSuggestedParams(
    sender,
    recipient,
    closeRemainderTo,
    revocationTarget,
    amount,
    note,
    assetID,
    params
  );

  const rawSignedTxn = opttxn.signLogicSigTransactionObject(opttxn, lsig);
  const tx = await client.sendRawTransaction(rawSignedTxn).do();
  console.log(tx.txId);
})().catch((e) => {
  console.log(e);
});

This does not work.
I get this error: TypeError: opttxn.signLogicSigTransactionObject is not a function

2

It’s algosdk.signLogicSigTransactionObject

See algosdk

3

Is that referring to this?

const rawSignedTxn = algosdk.signLogicSigTransactionObject({txn, lsig})?
5

Please I need help with this:

const algosdk = require('..');

const server = 'https://testnet-algorand.api.purestake.io/ps2';
const port = '';
const token = {
  'x-api-key': 'B3SU4KcVKi94Jap2VXkK83xx38bsv95K5UZm2lab', // fill in yours
};

// const bobmnemonic = 'curious duck pet daughter setup pretty surface saddle arm neck side guard alter tree turtle release shoe vivid power solid trim escape snack above page'; // fill in yours
// const bobAccount = algosdk.mnemonicToSecretKey(bobmnemonic);

const client = new algosdk.Algodv2(token, server, port);

(async () => {
  const program = 'int 1111';
  const compiledProgram = await client.compile(program).do();
  const programBytes = new Uint8Array(
    Buffer.from(compiledProgram.result, 'base64')
  );
  // Initialize arguments array
  const args = [];
  // Integer parameter
  args.push(algosdk.encodeUint64(123));

  // create a logic signature
  const lsig = algosdk.makeLogicSig(programBytes, args);
  const lsigaddr = lsig.address();
  const assetID = 12400859; // change to your own assetID
  const params = await client.getTransactionParams().do();
  const sender = lsigaddr;
  const recipient = sender;
  const revocationTarget = undefined;
  const closeRemainderTo = undefined;
  const note = undefined;
  const amount = 0;
  const txn = algosdk.makeAssetTransferTxnWithSuggestedParams(
    sender,
    recipient,
    closeRemainderTo,
    revocationTarget,
    amount,
    note,
    assetID,
    params
  );
  const rawSignedTxn = algosdk.signLogicSigTransactionObject(txn, lsig);
  const tx = await client.sendRawTransaction(rawSignedTxn).do();
  console.log(tx.txId);
})().catch((e) => {
  console.log(e);
});

I get this error: “TypeError: Argument must be byte array”

6

It works when I use an account address with the private key to sign the transaction but throws that error when I use a logicsig

7

try

const note = Uint8Array.from(Buffer.from(""));
8

After changing it, I still get the same error

9

And if I try removing the note field, I get this error message, “Error: genesis hash must be specified and in a base64 string.”

10

I have fixed the error after several debugging.
Will drop the code in case anyone experiences something similar for an easy fix.

const algosdk = require('..');

const server = 'https://testnet-algorand.api.purestake.io/ps2';
const port = '';
const token = {
  'x-api-key': 'B3SU4KcVKi94Jap2VXkK83xx38bsv95K5UZm2lab', // fill in yours
};

// const bobmnemonic = 'curious duck pet daughter setup pretty surface saddle arm neck side guard alter tree turtle release shoe vivid power solid trim escape snack above page'; // fill in yours
// const bobAccount = algosdk.mnemonicToSecretKey(bobmnemonic);

const client = new algosdk.Algodv2(token, server, port);

(async () => {
  const params = await client.getTransactionParams().do();
  const program = 'int 1';
  const compiledProgram = await client.compile(program).do();
  const programBytes = new Uint8Array(
    Buffer.from(compiledProgram.result, 'base64')
  );
  // Initialize arguments array
  const args = [];
  // Integer parameter
  args.push(algosdk.encodeUint64(123));

  // create a logic signature
  const lsig = algosdk.makeLogicSig(programBytes, args);
  const lsigaddr = lsig.address();
  const assetID = 12400859; // change to your own assetID

  const from = lsigaddr;
  const to = from;
  console.log(from);
  const revocationTarget = undefined;
  const closeRemainderTo = undefined;
  const note = Uint8Array.from(Buffer.from('0'));
  const amount = 0;
  const txn = algosdk.makeAssetTransferTxnWithSuggestedParams(
    from,
    to,
    closeRemainderTo,
    revocationTarget,
    amount,
    note,
    assetID,
    params
  );
  console.log(txn);
  const rawSignedTxn = algosdk.signLogicSigTransactionObject(txn, lsig);
  console.log(rawSignedTxn);
  const tx = await client.sendRawTransaction(rawSignedTxn.blob).do();
  console.log(tx.txId);
})().catch((e) => {
  console.log(e);
});