Questions tagged [python]

Python is an interpreted, general-purpose high-level programming language whose design philosophy emphasizes code readability.

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386 views

How do I convert a private key in hex to a Segwit private key expected by Electrum?

I've been following this code to generate SegWit addresses with python. However, I'm confused because this script doesn't output the private key in a usable way for Electrum. I found this site which ...
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1answer
41 views

Does python-bitcoinlib and the Bitcoin Core functional test framework share code? Were changes ever pushed down/upstream?

Does python-bitcoinlib and the Bitcoin Core functional test framework share code? Were changes ever pushed down/upstream?
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1answer
68 views

Test vector 1 BIP32 in Python

i tried to replicate code in this git https://github.com/tongokongo/bitcoin-basics/blob/master/HD_wallet/bip32.py . I'm not familiar with python but the xpub is correct (this is the Test Vector 1 from ...
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2answers
962 views

Download blocks in blk00000.dat format from a specific period

For study purposes, I would like to download blocks from a specific period, i.e. January 2017 - June 2017, in blk.dat format (blk00000.dat, blk*.dat). I downloaded blockchain.core but it makes me ...
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1answer
1k views

How to generate Hash160 from a private key with the Bitcoin module

I want to fix the script code. The script generates from a random private key Bitcoin Address by function (pubtoaddr) and works on the Bitcoin module: https://github.com/primal100/pybitcointools/blob/...
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1answer
129 views

XPub to YPub Converter (python) - Last digits wrong

The code below is generating an YPub from XPub with the last 6 digits wrong. How can I verify what's happening and fix this error? e.g.: It should be ...
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1answer
159 views

SPV client TCP connection in python

I am trying to implement an SPV client in python (for my own learning). I want to start by making a simple TCP connection to a full node, but I either cannot get a response to my version message, or ...
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2answers
89 views

library for validating bitcoin private and public keys

I am building a python script that gets a string and determines if it is a valid bitcoin private key or public key, and if so it returns its type/format (base58, BIP32, HexaDecimal etc.) and its ...
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1answer
92 views

Address generator error with python

I had created a script that creates a bitcoin private key, public key and address, for checking if all works fine I create one and check the private key on https://walletgenerator.net/, and it outputs ...
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2answers
2k views

How to use python rpc bitcoin to get the historical transaction record of a wallet address

How to use python rpc bitcoin to get the historical transaction record of a wallet address?My computer has synchronized all btc blocks, and txindex=1 has been configured. I want to try to get all the ...
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0answers
104 views

Parsing transaction hash from rawblock data

I got block raw data next url https://blockchain.info/rawblock/00000000000000000002447735c7723ee9188322c0938e6587866a4458b9135f?format=hex Can I find transaction hash in url used python?
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0answers
35 views

Can I get all block header data like the SPV node?

It hasn't been long since I studied Blockchain. I only need header data, not all block data, for study purposes. As far as I know, the SPV node stores only the block's header information. Can i get ...
2
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1answer
459 views

Cannot import python-bitcoinrpc

I am unable to import the package bitcoinrpc. I have installed it in python2 and python3 using python3 -m pip install python-bitcoinrpc/python -m pip install python-bitcoinrpc AND by cloning the repo ...
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1answer
5k views

Help needed with PyWallet and wallet dump using MacOS

Could anyone please give me some guidance on how to perform a wallet dump using PyWallet on a MacBook (macOS 10.12 Sierra)? I’m not very savvy with this stuff at all. Have an old wallet.dat file from ...
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2answers
3k views

convert private key to bitcoin address using python or php

I have private key like this 5JYJWrRd7sbqEzL9KR9dYTGrxyLqZEhPtnCtcvhC5t8ZvWgS9iC how to convert to bicoin address using python or php? example bitcoin address 18V7u8YNHKwG944TCkzYYj32hb6fdFPvQf
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1answer
93 views

How can bitinfocharts.com know the changes in BTC deposited to Binance?

I find this page here, which tells me how much BTC is deposited to Binance. How does this (or a similar) page work? When I deposit BTC to Binance, I am given an address, which I am fairly sure it's ...
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1answer
55 views

Calculate BitcoinGold Block Header Hash [closed]

I am trying to calculate block hash # 632295 { 'version': 536870912, 'prev_block_hash': '000000017590609fd72cadc5fd05732cfa1760bd882213afbb7b788c42e115c8', 'merkle_root': '...
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0answers
314 views

Connection refused when using bitcoinrpc on Linux

I am new to python-bitcoinrpc(also new to VM Linux actually) and I want to use the blockchain parser from alecalve to get ordered blocks. I used Windows to download the blockchain data into an ...
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1answer
137 views

Is there such a service as an unlimited Bitcoin wallet with an API?

Well, I did tons of research and currently I'm using bitcoinlib for python to have a wallet which should be able to hold over one million addresses and occassionally broadcast transactions. It has ...
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1answer
95 views

I need a few lines of python to make WIF addresses

I have code which generates WIF keys from hex keys. It just need a few more lines to generate WIF addresses. ------------------------ import binascii, hashlib, base58, sys def convert(z): ...
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2answers
91 views

How can I execute `getnewaddress` at my full node from a remote server?

I have a full node running on a digital ocean droplet. I have an app running at heroku, and I want to execute getnewaddress from this app. I'm trying to generate BTC addresses to which users can send ...
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0answers
30 views

How can I ask for reward after mining? [duplicate]

Let's assume that I found the nonce for the block the world try to mine now. How can I say in python that this is the nonce and this is my wallet address so transfer the reward to it?! Note: This ...
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1answer
109 views

bip39 converting from entropy to seed failing tests with entropy "00000000000000000000000000000000"

Trying to convert hexadecimal string of entropy to seed sentence with the below snippet. Failing the first test with 16 zero bytes. It seems that my function came to conclusion that checksum is '1011' ...
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1answer
60 views

Why downloaded Block Size doesn't match with actual block size mentioned on network?

I am trying to download a block(Height:474044) using an API from here in python. Block is obviously downloaded in JSON format. But when I store it in a file on my system it shows very weird size ...
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1answer
906 views

How to get uncompressed BTC address and private key from bit module for Python?

I am new in programming and BTC. I want to make some BTC address with private keys. Till now I learn that we have compressed and uncompressed private keys. But I get only compressed private keys and ...
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1answer
75 views

How to Construct a Ping Message

I am struggling greatly trying to figure out how to send a basic "PING" message, and receive back a "PONG" response. import random import hashlib import socket PEER_IP = "35.187.200.6" PEER_PORT = ...
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1answer
345 views

How to verify locking and unlocking scripts?

I've selected an arbitrary transaction id and retrieved its associated transaction details using the blockcypher explorer as follows: from blockcypher import get_transaction_details ...
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0answers
388 views

Issue generating private Key and segwit address with python

I used the following script to generate my private key and the corresponding segwit address. Then to test it, i sent funds to the address and imported the private key on blockchain wallet; RESULT: ...
2
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0answers
58 views

How to generate unspendable testnet bitcoin address with python?

I'm trying to generate a testnet address. However, I tried to write this python program (using help of various online code places), and I created this program. The program is designed to take a 20 ...
1
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1answer
1k views

Decoding hex scriptsig in Python

Running decodescript on d1a076722d11ddfd0fadb96d6d960b8b2ad6c6369570cd00df70a801a6be9e44 is returning: { "asm": "0 ...
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1answer
231 views

How to run a python script when occur incoming transaction in Bitcoin core 0.18?

I want to run a python script when occur an incoming transaction. I think set zapwallettxes flag in bitcoin.conf but I don't know where set the script path to execute. Is it possible to execute ...
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0answers
33 views

How to create a Bitcoin Transaction With Protocoin

Please how do I create a btc transaction and broadcast it with protocoin library? I want to create a transaction that will relay to the node without validating inputs and outputs. Of course I know the ...
2
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1answer
143 views

How to Pay to Multisig Wallet Using python-bitcoinrpc?

How do I pay to a multisig wallet? I am using the Python API (based on python-bitcoinrpc) that ships with the bitcoin source code, in directory bitcoin/test/functional. I'm using regtest. I call ...
1
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1answer
111 views

In Python RPC Calls, How is vout Address Derived for P2PK transaction?

How is the vout address derived for a P2PK transaction? I am using the Python API that ships with the bitcoin source code, in directory bitcoin/test/functional. I'm using regtest. I have written a ...
2
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1answer
546 views

How do I sign a transaction in Python?

How do I sign a P2SH transaction in Python? I am using the Python API that ships with the bitcoin source code, in directory bitcoin/test/functional. I'm using regtest. Here is a fragment of my unit ...
3
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1answer
196 views

Python implementation for LND path finding algorithm

The most common Lightning nodes use GO, C or Scala for their implementation. Is there any publicly available Python implementation for the path finding algorithm any of the most known clients use (LND,...
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1answer
130 views

What is the program in Python that print information about the current block?

What is the program in Python that print information about the current block the world try to mine (I mean Version, Previous Block, Merkle Root, Time, Bits) plus how many zeros we are looking for for ...
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2answers
172 views

How can I interact with Eclair from Python?

I want to write some scripts for experiments with Lightning. Python is the language I'm most comfortable with. From the three major implementations, LND has python-grpc and c-lightning has pylightning,...
0
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1answer
56 views

Source and (mis)handling of the private key for a basic tx

I'm looking to get "hands on" with signing, however when I adapt Runeks' thorough answer at https://bitcoin.stackexchange.com/a/5241/89798 my code invariably fails reporting that I've used the wrong ...
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1answer
347 views

How to convert a python example with getinfo to a usable function?

From Antonopoulos' book I try to use the example 3-3 on page 49 which uses a python skript called rpc_example.py to show the usage of the JSON-RPC API: from bitcoin.rpc import RawProxy p = ...
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1answer
431 views

Strange re-connection problem with python-bitcoinrpc

I am using https://github.com/jgarzik/python-bitcoinrpc to access the bitcoin core rpc. I have found a very strange re-connection problem. from bitcoinrpc.authproxy import AuthServiceProxy, ...
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1answer
110 views

Alternative to Python pip bitcoin

This Python pip package https://pypi.org/project/bitcoin/ was originally developed by Vitalik Buterin (that Ethereum guy) but is no longer maintained. Is there any alternative equivalent pip package ...
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1answer
817 views

Is there a Python or SageMath implementation for solving the ECDL problem for small secret multiplier?

I am looking for a Python script or SageMath code implementation for testing the Baby Step - Giant Stepand Pollard Rhoalgorithms on the secp256k1 curve. I have read that these algorithms are well ...
0
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1answer
1k views

Checking external bitcoin address balances via JSON-RPC API

I'm using bitcoin core json-rpc api in python and am wondering why... getreceivedbyaddress() ...doesn't allow me to specify an address that isn't in my local wallet? The whole blockchain is open, ...
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0answers
332 views

submitblock to btc-core fails to decode

I'm trying to create a little mining-script that connects over rpc to bitcoin core. I have problems following the documentation and all attempts to create a valid block (with dummy-nonce for testing) ...
0
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1answer
54 views

These testnet outputs are not making sense to me

Today I took some time to mess around with the bit Python library, which I find pretty easy to use. I have been wanting to do some Bitcoin programming for a while, so I decided to create a simple web ...
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2answers
292 views

How to get the block hash in the chainstate leveldb?

From this link What are the keys used in the blockchain levelDB (ie what are the key:value pairs)?, to get the block hash I use the obfuscation key and xor it with the result I get from the db. So I ...
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1answer
579 views

How exactly do I decode the block file info in leveldb?

Base on the links https://github.com/bitcoin/bitcoin/blob/fcbc8bfa6d10cac4f16699d6e6e68fb6eb98acd0/src/main.h#L392 and What are the keys used in the blockchain levelDB (ie what are the key:value ...
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1answer
155 views

Read an XPUB list of transactions to Python using my own node [closed]

Anyone familiar with a Python library that can get a list of all transactions under an XPUB but by connecting to a Bitcoin node through RPC?
2
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1answer
229 views

How to parse values in block index leveldb?

So I'm trying to read the block files with Python. From this link, What are the keys used in the blockchain levelDB (ie what are the key:value pairs)?, it tells you how to access the files with ...