NEM-SDK@1.6.2: Convert Account to Multisig

nem-convert-to-multisig.js

let endpoint = {
  'host': 'http://bigalice2.nem.ninja',
  'port': 7890
};

let networkId = -104;
let privateKeyOfAccountToConvert = "PRIV_KEY_HEX_ACCOUNT_TO_CONVERT";
let privateKeyOfCosig = "PRIV_KEY_HEX_ACCOUNT_SINGLE_COSIG";

let kpc = sdk.crypto.keyPair.create(privateKeyOfAccountToConvert);
let kps = sdk.crypto.keyPair.create(privateKeyOfCosig);

let addressToMakeMultisig = sdk.model.address.toAddress(kpc.publicKey.toString(), networkId); 
let addressCoSigner = sdk.model.address.toAddress(kps.publicKey.toString(), networkId);

console.log("Address to Convert to Multisig: " + addressToMakeMultisig); // TBKFYXLDLVMDZ76AU5EKVE7IA55BDXIV74FQSOCK
console.log("Address as single Co-Signer   : " + addressCoSigner); // TA3SH7QUTG6OS4EGHSES426552FAJYZR2PHOBLNA

// We make `addressToMakeMultisig` a 1-of-1 multisig with the only
// cosigner being the `kp` account

// type 1 = Add cosigner
let modification = sdk.model.objects.create("multisigCosignatoryModification")(1, kps.publicKey.toString());

// prepare transaction
let trx = sdk.model.objects.create('multisigAggregateModification')();
trx.modifications.push(modification);
trx.relativeChange = 1;

// wrap transaction
let creds = {password: '', privateKey: privateKeyOfAccountToConvert};
let prepared = sdk.model.transactions.prepare('multisigAggregateModificationTransaction')(creds, trx, networkId);

console.log(trx);
console.log(prepared);

// async broadcast of the transaction
(async function broadcast() {
    let result = await
    sdk.model.transactions.send(creds, prepared,
    endpoint);
    
    console.log(result);
})();