utxoupdatepsbt - Bitcoin

Example code for the utxoupdatepsbt JSON-RPC method. Complete guide on how to use utxoupdatepsbt JSON-RPC in GetBlock Web3 documentation.

This method updates all segwit inputs and outputs in a PSBT with data from output descriptors, the UTXO set, or both.

Parameters

Parameter

Type

Required

Description

psbt

string

Yes

A base64 string of a PSBT.

descriptors

array

An array of output descriptor strings or objects.

Request

curl --location --request POST 'https://go.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "utxoupdatepsbt",
    "params": ["cHNidP8BAHUCAAAAASaBcTce3/KF6Tig7cez..."],
    "id": "getblock.io"
}'

import axios from 'axios';

const data = JSON.stringify({
    "jsonrpc": "2.0",
    "method": "utxoupdatepsbt",
    "params": ["cHNidP8BAHUCAAAAASaBcTce3/KF6Tig7cez..."],
    "id": "getblock.io"
});

const config = {
    method: 'post',
    url: 'https://go.getblock.io/<ACCESS-TOKEN>/',
    headers: {
        'Content-Type': 'application/json'
    },
    data: data
};

axios(config)
    .then(response => console.log(JSON.stringify(response.data)))
    .catch(error => console.log(error));

import requests
import json

url = "https://go.getblock.io/<ACCESS-TOKEN>/"

payload = json.dumps({
    "jsonrpc": "2.0",
    "method": "utxoupdatepsbt",
    "params": ["cHNidP8BAHUCAAAAASaBcTce3/KF6Tig7cez..."],
    "id": "getblock.io"
})

headers = {
    'Content-Type': 'application/json'
}

response = requests.post(url, headers=headers, data=payload)
print(response.text)

use reqwest::header;

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = reqwest::Client::new();
    
    let response = client
        .post("https://go.getblock.io/<ACCESS-TOKEN>/")
        .header(header::CONTENT_TYPE, "application/json")
        .body(r#"{
            "jsonrpc": "2.0",
            "method": "utxoupdatepsbt",
    "params": ["cHNidP8BAHUCAAAAASaBcTce3/KF6Tig7cez..."],
            "id": "getblock.io"
        }"#)
        .send()
        .await?;
    
    println!("{}", response.text().await?);
    Ok(())
}

Response

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": "cHNidP8BAHUCAAAAASaBcTce3/KF6Tig7cez..."
}

Response Parameters

Field

Type

Description

result

string

The updated PSBT in base64 format with UTXO data filled in.

Use Case

The utxoupdatepsbt method is essential for:

Adding UTXO data to PSBTs for signing
Updating PSBTs with blockchain state
Preparing PSBTs for hardware wallet signing
Filling in missing witness UTXO information
Supporting offline signing workflows
Building complete PSBT signing pipelines

Error Handling

Status Code

Error Message

Cause

403

Forbidden

Missing or invalid ACCESS-TOKEN.

-25

Error parsing PSBT

The PSBT string is malformed or invalid.

Integration With Web3

The utxoupdatepsbt method helps developers:

Prepare PSBTs for offline signing
Fill in missing UTXO data from blockchain
Support hardware wallet integrations
Build complete signing workflows
Enable watch-only wallet spending

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Last updated 10 days ago

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