Questions tagged [bitcoinjs]
BitcoinJS allows you to create webpages that pull information from the blockchain.
58
questions
0
votes
1answer
6 views
How to get Bitcoin input transaction hash string from bitcoinjslib Transaction object?
I'm using bitcoinjs-lib and its Transaction object. Transaction.ins is an array of objects, each which has a hash and script property. Both of these properties are Uint8Arrays.
I am trying to get ...
0
votes
0answers
14 views
Sign a Partially Signed rawtransaction with bitcoinjs-lib
I was trying to figure out how to use the bitcoinjs-lib. I was thinking if I could sign a partially signed raw transaction in bitcoijs-lib.
For example - If I have a hex String whose input1 is ...
0
votes
1answer
201 views
How to retrieve readable private key from bitcoinjs-lib
I'm still new to bitcoin and experimenting a lot with bitcoinjs-lib in JavaScript.
How do I create a readable string from a private key?
This is my current setup:
const seed = bip39....
1
vote
1answer
425 views
How to get xpriv and xpub from keyPair with bitcoinjs-lib
I have this code:
const bitcoin = require('bitcoinjs-lib');
const keyPair = bitcoin.ECPair.makeRandom({ });
Question: how do I get xpriv and xpub from keyPair
1
vote
0answers
31 views
How to send & receive bitcoin using bitcoinjs-lib?
First I create HD Wallet using BIP32 using mnemonics.
Now I want to generate new child addresses with private key using xpub & xpriv for every receive.
Then for example, I received BTC in 2 ...
0
votes
2answers
59 views
how to generate bitcoin adddres using seed?
Hi i am new to bitcoin all i want to know is how to generate address using mnemonic seed?
let testnet =Bitcoin.networks.testnet;
let keypair =Bitcoin.ECPair.makeRandom({network:testnet});
let address=...
0
votes
1answer
116 views
Looking for JS/Node.js code example to sign a transaction (with multiple UTXOs) with only the extended private key
Is there any Javascript code out there or examples on how to sign a transaction by using the extended-private-key?
What I am essentially looking for is code that will help derive the private key, ...
0
votes
1answer
296 views
How to get unspents for inputs using bitcoinjs-lib?
I would like my simple wallet app to automatically select UTXOs for inputs. I realize that I can't accomplish this with just bitcoinjs, but is there something I can add to it to keep track of unspents?...
2
votes
2answers
3k views
Create OP_RETURN tx with Bitcoinjs-lib
I know how to create a basic TX:
var bitcoin = require('bitcoinjs-lib')
var tx = new bitcoin.Transaction()
// Add the input (who is paying) of the form [previous transaction hash, index of the ...
0
votes
1answer
90 views
Cannot read property 'toWIF' of undefined
I am working on a cryptocurrency site in which each user will have there own individual deposit address to put currency on site. I am using bitcoin-core, bitcoinjs-lib, along with quite a few other ...
0
votes
1answer
456 views
How do you sign data with a private key? [javascript]
Using BlockCypher’s signing tool (link), I can sign the following data:
05de69f5d37f41340eed3230f03d2394dde5e497738a76f027b7d962a0cbdf39
with the private key:
...
0
votes
0answers
25 views
How do you sign transactions from a HD wallet? [duplicate]
I'm using the following tool to generate a HD wallet:
https://iancoleman.io/bip39/
However, it gives quite a few different private keys and I'm not sure which one is used to sign transactions with.
...
0
votes
1answer
88 views
how to create a transaction that can only run in bch-abc using javascript?
I use the "bitcoincashjs" or "bch-lib" and want to add a new opcode "OP_CHECKDATASIG" to output.How to do?
const utxo = {
'txId' : '...
0
votes
1answer
155 views
Generating Output Script from Bitcoin.js or other Javascript Library
I'm attempting to use the Ledger Wallet API to sign a multi-sig transaction. The API works as follows:
var inputs = [
[ "71f97fa2a21486ecd99674a8ae068d92acd2e9db49c199473be39984e6cbe0f6", "00000000"...
0
votes
2answers
194 views
Using BitcoinJS - How do you verify a message using a segwit bech32 (bc1…) / P2SH (3…) addresses?
I created a signature from a message using my private key. But how do I verify this signed message using my segwit addresses of 3... or bc1...? How do I verify this using the BitcoinJS library?
2
votes
1answer
427 views
How to create a brainwallet with bitcoinjs?
This is how to create a brainwallet with bitcore
const Bitcore = require("bitcore-lib");
// const Mnemonic = require("bitcore-mnemonic");
// https://bitcore.io/api/lib/crypto
let brainsrc= 'satoshi'
...
0
votes
1answer
433 views
UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'fromSeedBuffer' of undefined
I am getting Getting error at this line
var root = bitcoin.HDNode.fromSeedBuffer(seed);
UnhandledPromiseRejectionWarning: TypeError: Cannot read property
'fromSeedBuffer' of undefined
Here is ...
1
vote
1answer
22 views
Can I use wallet balance in satoshis as input for transaction builder ( bitcoinjs-lib )? [closed]
Can I use wallet balance in satoshis as input for transaction builder using bitcoinjs-lib ?
If yes, how?
0
votes
2answers
343 views
How to change network on BitcoinJS-lib with Coininfo and generate Dogecoin address?
Can't find out how to change network on BitcoinJS-lib with Coininfo and generate Dogecoin address?
In a Coininfo's example I found this: https://github.com/cryptocoinjs/coininfo#want-to-use-with-...
0
votes
1answer
120 views
Can't generate same addresses as bitcoincore using xprv from bitcoin-core
First of all all addresses below are for testing purposes so I don't care about private keys.
So dumped wallet created by Bitcoin-qt v0.16.2:
extended private masterkey: ...
4
votes
4answers
188 views
Preventing the exposure of public addresses on a website
Rather than having a single, fixed address, I want to generate a new address on my website every time a user request comes in.
I'm concerned about google or another web crawler indexing my website ...
0
votes
1answer
216 views
Bitcoinjs-lib help with deterministc wallet
i'm learning about bitcoin, and bitcoinjs-lib (https://github.com/bitcoinjs/bitcoinjs-lib)
I created a dummy wallet on coinomi using this mnemonic ('eight better wealth display father cave suffer ...
0
votes
1answer
106 views
Bitcoinjs module missing issue
I am trying to run this code with node and bitcoinjs-lib but I keep getting missing lib.
Any idea what am I missing?
I am on a Windows Server 2016. I try to create a P2SH address by hashing a ...
1
vote
0answers
171 views
bitcoinjs-lib seems to skip a step in deriving addresses from a BIP 44 wallet
According to this wiki page to create a bitcoin address,
1) you have your public key of the properly derived path
2) Then SHA256 it
3) Then RIPEMD-160 it,
Add version byte at the front and boom ...
2
votes
1answer
259 views
Error pushing hex of tx, generated with bitcoinjs 1.0, on testnet
I'm new to bitcoin programming and decided to give it a try with the release of bitcoinjs-lib 1.0. Here is how I generate the hex for the transaction
var bitcoin = require('bitcoinjs-lib');
var key =...
1
vote
1answer
717 views
How to sweep a segwit bech32 private key?
I'm testing segwit bech32 addresses and generated the following using bitcoinjs:
address: bc1qc7u5njf4nf2rj3zys642mfc7nct6kdven8j4e9
private key: 5Kkzs8XrJNAmf9VQDFeGBfaRvSByAvPK6DbDXw5BVqswWaXSG2Y
...
1
vote
1answer
95 views
Where does the entropy of BitcoinJS' makeRandom() come from?
The library BitcoinJS (https://github.com/bitcoinjs) has a method called makeRandom(). Where does its entropy (randomness) come from? Is it as secure as the method from http://bitaddress.org/ (moving ...
1
vote
0answers
69 views
Using blockcypher BitcoinJs at clientside is secure or not?
I am trying to create new transaction using bitcoinjs at client side.
Is it a secure way to create a transaction from Client side, which includes curl call.
Scenario, if I start from creating the new ...
3
votes
1answer
1k views
How to push a raw transaction using BitcoinJS (and Request)?
I'm using BitcoinJS to create a playground for Bitcoin transactions.
I have created the following Javascript file:
const request = require('request');
const proxiedRequest = request.defaults({proxy: "...
0
votes
1answer
277 views
ScriptHash from bitcoin address with BitcoinJS
I need to interact with Electrum server API, in order to get UTXOs of a bech32 address.
Electrum doesn't support bech32 but supports searching by ScriptHash, which is be obtainable from an address.
...
0
votes
0answers
15 views
Transferring partial BTC between wallets if I know both private keys [duplicate]
Is there a way to transfer/import partial amounts of BTC from one wallet to another off the chain in order to avoid transaction fees? I assume this is how services like Coinbase get around letting you ...
0
votes
2answers
333 views
Creating an OP_CSV transaction with bitcoinjs
I'm working on a tool for timelocked contract generation. My redeem script looks like so:
OP_HASH160 <revocationHash> OP_EQUAL
OP_IF
<bobPubKey>
OP_ELSE
<timeDelay> ...
1
vote
2answers
997 views
How to decode transaction inputs from raw data using bitcoinjs-lib?
I need to calculate fees for each transaction in block.
I retrieve raw block data and use bitcoinjs-lib library to decode it to Block object:
const block = Bitcoin.Block.fromHex(data.rawblock);
It ...
0
votes
1answer
211 views
Having issues broadcasting BitcoinJS transaction.
I'm trying to send testnet with bitcoinjs, but when I go to broadcast the hex, it gives me an error code that says "fee is too high: 12372928". Now, from my understanding, the fee is the input - ...
0
votes
1answer
137 views
How BitcoinJS sync bitcoin blockchain/transaction data?
I see the reference code in BitcoinJS website about 'Creating a Transaction':
var tx = new bitcoin.TransactionBuilder()
// Add the input (who is paying):
// [previous transaction hash, index of the ...
1
vote
1answer
285 views
How to convert a keyPair to JSON and back?
Using bitcoinjs you can generate a keyPair with the following code:
var keyPair = bitcoin.ECPair.makeRandom();
How can I stringify this object to JSON and then parse it back to an object? JSON doesn'...
0
votes
1answer
1k views
HD wallet implementation
I want to create public addresses in offline browser from master public key so that owner of master private can access the funds available in child address.
but I am not able to understand how to use ...
7
votes
1answer
711 views
Which language has better Bitcoin API experience, C# or Node.js?
At the moment it seems to me on the .NET side NBitcoin would compete with Bitcoin.js on the other.
Update: I decided on NBitcoin. It has a great book to learn from.
Note I will not form opinion on my ...
1
vote
1answer
552 views
Specifying fee amount using bitcoinjs
I'm currently playing with bitcoinjs (https://bitcoinjs.org/) and I'm creating offline transactions that I broadcast over the network after.
I've successfully create my first transaction using this : ...
1
vote
1answer
783 views
How to create a deterministic wallet using bitcoinjs-lib
I'm new to bitcoin technology, however, I'm trying to develop a web wallet using bitcoinjs-lib that works like that of blockchain.info. I've gone through the code samples on the github repo but couldn'...
3
votes
1answer
1k views
How do you validate a bitcoin address using bitcoinjs library in javascript?
How would one validate a bitcoin address using the bitcoinjs library? Or is there another way to do this via javascript?
3
votes
1answer
371 views
Understanding signing messages with bitcoinjs-lib
I'm trying to understand what a specific line of code does when signing a message using bitcoinjs-lib. Here's the code:
var bitcoin = require('bitcoinjs-lib')
var bitcoinMessage = require('bitcoinjs-...
4
votes
1answer
1k views
How to use bitcoinjs-lib with Regtest?
I was trying to use the bitcoinjs-lib (1) with my regtest network. More specifically I was trying to build a tx with TransactionBuilder but it gave me a 'transaction has no matching Script' exception. ...
1
vote
0answers
101 views
BItcoinjs - safest way to manage wallet on a potentially untrusted device
As per the title, what would be the safest way to run a Bitcoin wallet on a potentially untrusted device, such as a mobile phone?
The question assumes the usage of bitcoinjs-lib (which allows, among ...
2
votes
1answer
355 views
OP_RETURN Promise with bitcoinjs-lib v2.2.0 and blockchain.info
So the below is the function I'm running. I'm sending in the key for this bitcoin address
16WBguy6KVyTGnF4KX7Vmdx8ztj4wENh4W
and the message
bkawk
to this function
// Require the packages that ...
2
votes
1answer
286 views
Hybrid Bitcoin web wallet for performing multi-sig transaction on an e-commerce site
Two participants in a transaction, a buyer and a seller, need to interact financially. For security, they themselves keep their private keys and sign transactions on client using JS.
I want to create ...
6
votes
1answer
1k views
Is there a good tutorial on how to use bitcoinjs exit nodes?
The documentation that I found seems to contain info about specific API calls, but no top level explaination/example.
Where can I find a practical concise example of using exit nodes?
I'd like to ...
4
votes
2answers
1k views
How do you broadcast a transaction programatically?
What is the best way to broadcast a transaction to the network programatically? I know that blockchain.info has /pushtx but I'm pretty sure it rejects XHR requests from external sources because of ...
1
vote
1answer
323 views
How to develop an ownership tracking service based on bitcoin blockchain
Now I expect to develop an ownership tracking service like Ascribe. I'm planning to develop it as following, however I am not sure whether my plan is correct. Therefore, please let me ask two ...
1
vote
1answer
251 views
OP_EQUALVERIFY Problem
I'm making a full-service wallet, I already made the UTXOs selection algorithm and now I want to push the transaction hex bytes. It works when I push only a transaction with only 1 input, but if I try ...
