External Key Lock unspent asset

Question

Is it possible to lock unspent asset for External Key?

If yes please teach me how.

 

Thank you very much!

Answer 1

The locked status of a UTXO (unspent transaction output) is not a blockchain-level event but rather just a status which is managed within the node's wallet. Any locked output will not be used when automatically selecting outputs to create a new transaction. So there's nothing to prevent you unlocking an output which belongs to an external private key.

Comments

I tried to use preparelockunspent using external address. I got this error
{
    "result": null,
    "error": {
        "code": -709,
        "message": "Private key for from-address is not found in this wallet"
    },
    "id": null
}

What I am looking for is a way to input the private key without importing it in the node.

---

If you're using an external private key toy need to replace preparelockunspent with createrawsendfrom, preparing a transaction to send the desired quantity back to the same address, then using signrawtransaction+sendrawtransaction to sign and broadcast it. There is an extensive tutorial on this in the "Exchanging with external private keys" section of this page: https://www.multichain.com/developers/atomic-exchange-transactions/