converttopsbt - Bitcoin

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

This method converts a raw transaction to a PSBT. The original transaction must be unsigned, and its scriptSigs and witnesses are stripped.

Parameters

Parameter	Type	Required	Description
hexstring	string	Yes	The raw unsigned transaction hex
permitsigdata	boolean	No	Whether to allow and strip existing signature data (default: false)
iswitness	boolean	No	Whether the transaction is a witness transaction

Request

cURL

curl --location --request POST 'https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "2.0",
    "method": "converttopsbt",
    "params": ["0200000001a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6e7f8091a2b3c4d5e6f708192a3b4c5d60000000000ffffffff0100e1f505000000001600141d0f172a0ecb48aee1be1f2687d2963ae33f71a100000000"],
    "id": "getblock.io"
}'

bitcoinjs-lib

example.js

const axios = require('axios');

const response = await axios.post('https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/', {
    jsonrpc: '2.0',
    method: 'converttopsbt',
    params: ["0200000001a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6e7f8091a2b3c4d5e6f708192a3b4c5d60000000000ffffffff0100e1f505000000001600141d0f172a0ecb48aee1be1f2687d2963ae33f71a100000000"],
    id: 'getblock.io'
}, {
    headers: { 'Content-Type': 'application/json' }
});

console.log(response.data.result);

Request

example.py

import requests

response = requests.post(
    'https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/',
    headers={'Content-Type': 'application/json'},
    json={
        'jsonrpc': '2.0',
        'method': 'converttopsbt',
        'params': ["0200000001a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6e7f8091a2b3c4d5e6f708192a3b4c5d60000000000ffffffff0100e1f505000000001600141d0f172a0ecb48aee1be1f2687d2963ae33f71a100000000"],
        'id': 'getblock.io'
    }
)

print(response.json())

Rust

example.rs

use reqwest::Client;
use serde_json::{json, Value};

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    let client = Client::new();

    let response = client
        .post("https://shared.eu-central-1.getblock.io/<ACCESS-TOKEN>/")
        .header("Content-Type", "application/json")
        .json(&json!({
            "jsonrpc": "2.0",
            "method": "converttopsbt",
            "params": ["0200000001a1b2c3d4e5f6a7b8c9d0e1f2a3b4c5d6e7f8091a2b3c4d5e6f708192a3b4c5d60000000000ffffffff0100e1f505000000001600141d0f172a0ecb48aee1be1f2687d2963ae33f71a100000000"],
            "id": "getblock.io"
        }))
        .send()
        .await?
        .json::<Value>()
        .await?;

    println!("Result: {}", response["result"]);
    Ok(())
}

Response

{
    "jsonrpc": "2.0",
    "id": "getblock.io",
    "result": "cHNidP8BAHUCAAAAASaBcTce3/KF6Tet7qSze3gADAVmy7OtZGQXE8pCFxv2AAAAAAD+////AtPf9QUAAAAAGXapFPUKlXhpm/rZ4JBKZ2n3nQ4jCMYBiKz1AAAAAA=="
}

Response Parameters

Parameter	Type	Description
jsonrpc	string	JSON-RPC protocol version ("2.0")
id	string	Request identifier matching the request
result	string	The base64-encoded PSBT

Use Cases

• Migration: Convert a raw transaction into a PSBT

• Interoperability: Move from legacy flows to PSBT

• Signing Prep: Prepare a raw transaction for device signing

• Tooling: Bridge raw-transaction and PSBT tools

Error Handling

Error Code	Message	Description
403	Forbidden	Missing or invalid ACCESS-TOKEN
-22	Decode failed	The transaction or script could not be decoded
-8	Invalid parameter	A parameter is out of range or malformed
-32602	Invalid params	A parameter is missing or has the wrong type