6
votes
Using PHP with RPC and cookie
Not sure if you're still looking for an answer, but I just stumbled upon this myself and for the benefit of anyone running into this.
Even though it's called cookie based authentication, you still ...
- 61
5
votes
Accepted
Is there a way to generate new addresses for someone else's wallet?
Bob can provide Alice with an extended public key (xpub). This will allow Alice to generate as many addresses as required, all of which will be accessible to Bob via the corresponding extended private ...
- 17.3k
4
votes
Accepted
Raw Transaction Fee - 256: absurdly-high-fee error
The fee is calculated from the difference between vin and vout. Here you are sending a very small amount to an addresses but you have not specified an output to receive the change. The client sees ...
- 146
4
votes
How can I accept Bitcoin as a payment without a 3rd party gateway
There are several solutions out there and currently the most hyped one is probably BTC-Pay. It also supports lightning, so you should be pretty future-ready.
- 304
4
votes
convert private key to bitcoin address using python or php
I think this video will explain it in details (python):
https://youtu.be/tX-XokHf_nI
Using the code from video, pip packages ecdsa , hashlib and base58:
import ecdsa
import hashlib
import base58
# ...
- 1,719
4
votes
Actively display wallet funds on web page - how?
I already have bitcoind running with a 4GB pruned database, and I'm hoping that will be enough.
It is! By running bitcoin-core, you can pull this data in an easy, trustless way.
I would recommend ...
- 18.4k
3
votes
How To Calculate Merkle Root?
This is the correct way to double hash two tx's.
First you need to convert them into little endian, and then convert into raw binary data before hashing.
<?php
function le_raw ($str) {
return ...
- 131
3
votes
Accepted
How to integrate Blockchain Wallet API V2 to php
You need to run a local nodejs service. From there you can then integrate with php.
As of January 2016 Blockchain.info made changes to the wallet API service that now require you to run a local ...
- 5,676
3
votes
How to send bitcoins with commission extracted from payment in PHP or bitcoind
Here is the algorythm without the code:
createrawtransaction with amount that you want to send assuming that fees are 0
fundrawtransaction to let your bitcoind construct final transaction, put your ...
- 153
3
votes
Accepted
Why a flip a bin before hashing in this script?
Hashes are big endian by standard, and most computers use little endian, so it's probably just for convenience. See Why does the Bitcoin protocol use the little-endian notation?
- 7,428
3
votes
Accepted
What is scriptpubkey for in the coinbase transaction ? (and more..)
The mined Bitcoin "goes" to the scriptPubKey(s) in the coinbase transaction.
Bitcoin operates on spending transaction outputs. Submitting a block does not magically cause a transaction ...
- 72.1k
2
votes
Can I sign a text with a Bitcoin address using PHP only?
A bit late but I created a PHP library for cryptocurrency. You can use this library to achieve what you want.
You can use it like this:
require('CryptoPHP.php');
$wif_key = '...
- 193
2
votes
Generating Bitcoin Public and Private Keys
Bitcoin uses point multiplication on the Elliptic Curve secp256k1 to generate a public key from a private key. Basically, this curve has a defined Generator point G, and a method for 'adding' two ...
- 11.9k
2
votes
Accepted
Connect to Bitcoin Node behind tor network
The RPC interface is not exposed over Tor. The only thing that goes over Tor is the P2P connection. To access the RPC server, you need to connect directly to the node's IP address, not connect to it ...
- 72.1k
2
votes
Accepted
PHP - Bitcoind sets up wrong transaction fee
The value you specify for custom fee is in fee per kilobyte. Until recently, the "size" for fee computations was always rounded up to 1 kilobyte anyway, leading some people to believe that the amount ...
- 110k
2
votes
How to generate addresses in PHP
Full instruction based on response of @Farghaly: Ubuntu 16
Install dependencies
sudo apt-get install php-bcmath php-gmp
composer require bitwasp/bitcoin
And then in fiel app.php
<?php
require '...
- 133
2
votes
send bitcoin to mobile number or email address
First of all: You do not really send the bitcoins to an email-adress or a phone number. You can only transfer them from one bitcoin adress to another one.
My understanding: The internetsite / (...
- 2,127
2
votes
jsonRPC calling createrawtransaction in PHP
you should pass parameters as an array.
try like that:
$bitcoin->createrawtransaction(
array(
array(
"txid"=>"...
- 3,689
2
votes
Accepted
Sweeping a bitcoin private key using PHP
No MVP PHP code, but some bits that could help.
verify the private key
Assuming you want a private key to be in the secp256k1 ECDSA range. You could check if the key is any number between ...
- 1,460
2
votes
How to connect to a public node through json RPC?
Not all nodes will have the JSON-RPC enabled, and especially without private credentials. You will probably find a block explorer API much more accessible, because they are built to handle public ...
- 7,428
2
votes
How can I extract my bitcoin public address from my bitcoin private key using PHP for Nodejs?
Private Key is a 32 bytes data
Apply ECDSA or Elliptic Curve Digital Signature Algorithm to the private key.
The above step dervies the public key,.
(Legacy)Now append 0x04 to the start of the public ...
- 21
1
vote
how to get change address using derived BIP44 publicKey?
I guess I've found the answer as explained in bip43
m / purpose' / *
Apostrophe indicates that BIP32 hardened derivation is used.
We encourage different schemes to apply for assigning a separate BIP ...
- 3,689
1
vote
Port 8333 and Issues to have a connection
You are conflating the two ports that Bitcoin Core opens and uses.
There is the Bitcoin network port. That is port 8333 by default. You DO NOT want to try to connect to that as it is used for the ...
- 72.1k
1
vote
Accepted
PHP: is there a way to convert a private ECDSA key to its corresponding public key?
Yeah, you do "need some code which multiplies some coordinates on the elliptic curve" :). If you don't have extensive cryptography experience I would recommend you use library rather than trying to ...
- 127
1
vote
Creating Payment system using Blockchain API
The question is pretty general in that you may be using Blockchain API in the generic way. Blockchain.info is a company that provides an API to use on the Bitcoin network. If you want to write ...
- 491
1
vote
Dynamic Transaction Hash Confirmation
Submitting transaction ID is not a safe way to verify payments. As you know bitcoin transactions are public and anyone can get see all TXIds. Same reason why even the donor bitcoin address is not a ...
- 2,017
1
vote
development of bitcoin-abe like software
output is spent (e.g. if appear in "vin" to some other transaction), I store an indicator.
Now single block is processed for 1-2 sec.
Implication of this is,
if you want to check address ...
- 211
1
vote
does anyone know how to send the "exp" parameter in an Electrum request
Yes. Use "expiration": "3600" and it'll work.
- 111
1
vote
trying to get text of a field in json rpc 2.0 response into ar PHP variable
As you have convert response to array using json_decode so you can access by array element inside result.
You can access by echo $result["result"]["address"];
- 163
1
vote
trying to get text of a field in json rpc 2.0 response into ar PHP variable
To get the address you would do:
$result = json_decode($response, true);
$address = $result["result"]["address"];
- 5,676
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