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Bitcoin: Bitcoin API for getting an input script?

Published by Terlumun Aondover on February 10th, 2025.

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First steps with Bitcoin junctions: API Bitcoin guide

Bitcoin is a decentralized digital currency, which is based on complex cryptographic techniques, including the basic blockchain protocol. To get insight into the network behavior and improve our understanding of how it works, interaction with the node itself via API interfaces (application programming interfaces) is a great approach. However, access to some nodes or data may be limited due to security measures. Fortunately, we will provide you with a step -by -step guide on how to access Bitcoin input data through various programming languages.

Choosing the right API

To start, select the API interface that provides access to the network status and bitcoin transaction. The most commonly used APIs are:

* API-Bitcoins : This is the official API interface access to bitcoin nodes. It allows you to download information about blocks of flats, transaction outputs and others.

* Open the Bitcoin network : Open the BNB (OBN) network is a bitcoin network fork that provides an alternative API interface for interaction with nodes.

In this article, we will focus on using the Bitcoin API interface.

Environmental configuration

Before you start coding, make sure you have:

Cryptocurrency portfolio and a knot connected to it.

The “Curl” or Python library you choose (we recommend using “Request” for Python).

Basic knowledge about programming in C

or Python.

download of block headers and transaction outputs

Here is an example of how you can use the API interface of the bitcoin node in Python:

`Python



Import requests

with crieptography.hazmat.hazmat.primitives import series

with cryptography.hazmat.backends import_backend

with bitcoinlib.crypto import



Set the URL of nodes and certificates

node_url = "http: // localhost: 8333"

username = "Your username"

Password = "Your password"



Create a pair of PGP keys for signing scripts

pgp_key = Serializal.lamie_der_x509_certificate (

    filename = "Path/to/your-PRIVATE-KEY.PEM", Backend = default_backend ()

)

def get_block_header (node_url, username, password):

    Headers = {"Authorization": f "base {username}: {password}"}

    response = requests.get (f "(f" {node_url} /block.header ", headers = headers)

    Return Response.json ()

def get_transaction_output (node_url, block_header_json, transactions_id):

    Headers = {"Authorization": f "base {username}: {password}"}

    response = requests.get (f "(f" {node_url}/txout/{transaction_id} ", headers = headers)

    Return Response.json ()



Sample use:

block_header = get_block_header (node_url, username, password)

Print (block_header)

transaction_output = Get_transaction_output (node_url, block_header ['header'], "your-transation-ID")

print (transaction_output)

submitting all this

To put everything in one function, you can create a class that supports the junction interaction. Remember to replace substitute values (eg “node_url, Username “and” Password “) with your actual certificates.

“ Python

Import requests

with crieptography.hazmat.hazmat.primitives import series, hashes

with cryptography.hazmat.backends import_backend

Bitcoinnodeapi class:

Def __init __ (me):

self.node_url = “http: // localhost: 8333”

self.username = “your-username”

self.password = “your-password”

Def Get_Block_header (Self):

Headers = {“authorization”: f “base {self.username}: {self.password}”}

response = requests.get (f “(f” {self.node_url} /block.header “, headers = headers)