I can provide you with a step -by -step guide to placing information in OP_RETTURN.

OP_REGurun understanding

OP_RETURN is a standardized way to code Bitcoin events at URL, which can easily decode. It uses a specific form and structure to represent each event, including the sender’s address, amount and other information.

Step-by-step guide to add information to OP_reunn file

• Create a new event : Before you can add information to the OP_reunt UURL address, you need to create a new Bitcoin event using the GetRawtraSaction '. You can create an event with the wallet or library you want.

Json

{

“Txid”: “Some_hash”,

“Vout”: [1, 0],

“Quantity”: “Some_valu”

}

`

Replace some_hash event with real hash and[1, 0] the sender address.

• Codes Event Information for OP_ReUntr : You can use the library, such as BitcoinLib orJSON-OPS, to encode the event information on the OP_RETURN string. Here’s an example of “BitcoinLib”:

`Python

Bring bitcoinlib

tx_data = {

“Txid”: “Some_hash”,

“Vout”: [1, 0],

“Quantity”: “Some_valu”

}

OP_RATURN_DATA = BITCOINLIB.ENCODO_OP_RETURN (TX_DATA)

Print (op_return_data)

output: “Some_hash-Vout [1,0]: Some_valu Op _…”

`

4 Here is an example:

`Python

Bring bitcoinurl

op_return_url = bitcoinurl.encode_op_return (op_return_data)

Print (OP_RETURN_URL)

Departure: “

`

• Disassembles OP_RETURN URL : OP_ReUNT-URL to use a library such as JSON-OPS orBitcoinLib. Here is an example using JSON-OPS:

`Python

Bring JSON

OP_RETURN_DATA = “Some_hash-Vout [1,0]: Some_valu OP _…”

coded_data = op_return_data.encode (“UTF-8”)

decoded_data = json.loads (coded_data)

Print (decoded_data)

output: {“txid”: “some_hash”, “vout”: [1, 0], “quantity”: “Some_value”}}

`

error processing

As you mentioned, you get an error {" code ": -22," ...}is Signawtransaction”. This error usually occurs when the event information is not valid or cannot be encoded with OP_RETURN. Check this case:

• Event information is in the correct format (eg “TXID, Vout,quantity`)

• The sender’s address is properly linked to the event

If you still have problems, please provide more information about your error message and I will be happy to help!