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8 votes
Accepted

How to generate addresses in PHP

Use BitWasp Bitcoin-php library https://github.com/Bit-Wasp/bitcoin-php <?php use BitWasp\Bitcoin\Bitcoin; use BitWasp\Bitcoin\Key\PrivateKeyFactory; $network = Bitcoin::getNetwork(); $privateKey ...
Farghaly's user avatar
  • 883
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 ...
tsak's user avatar
  • 61
5 votes
Accepted

How would one monitor an address for a transaction and 1 confirmation in PHP?

Cron Jobs and 3rd Party API: You could try with cron jobs, but I wouldn't run it every second, that's rather exhaustive. Maybe every 5 or 10 minutes, and then have it check the current total ...
m1xolyd1an's user avatar
  • 5,666
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 ...
Raghav Sood's user avatar
  • 17.1k
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 ...
Nikos Kostoulas's user avatar
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.
Giszmo's user avatar
  • 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 # ...
Tony Sanak's user avatar
  • 1,699
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 ...
chytrik's user avatar
  • 18.3k
3 votes
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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 ...
m1xolyd1an's user avatar
  • 5,666
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 ...
mpapec's user avatar
  • 131
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 ...
Denis Matafonov's user avatar
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?
JBaczuk's user avatar
  • 7,418
3 votes
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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 ...
Ava Chow's user avatar
  • 71k
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 ...
meshcollider's user avatar
  • 11.9k
2 votes
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Is there a way to get the memory pool in order of newest first?

I think you have two options: 1) Patch bitcoin-core and make getrawmempoolentry return the mempool transaction sorted after entry_date. There is boost multi index that would be capable to fast sort ...
Jonas Schnelli's user avatar
2 votes

jsonRPC calling createrawtransaction in PHP

you should pass parameters as an array. try like that: $bitcoin->createrawtransaction( array( array( "txid"=>"...
Tailer's user avatar
  • 3,669
2 votes

Bitcoin Transaction Detection With PHP

Im guessing your on ubuntu because of your username ;) Step 1 add the bitcoin ppa sudo apt-add-repository ppa:bitcoin/bitcoin Step 2 install bitcoind sudo apt install bitcoind Step 3 set bitcoind ...
Web Weave's user avatar
  • 429
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 ...
Pieter Wuille's user avatar
2 votes

How to send portion of funds from a private key programmatically?

You can either use your own bitcoind server or you can use a 3rd party API service. Let's do a few examples of what you are asking. I'll use short fake addresses and private keys as examples to make ...
m1xolyd1an's user avatar
  • 5,666
2 votes

With JSON how do I know the amount that was LAST sent to a given address?

You can also use the filter GET parameter to ensure that the first transaction is one where the address receives bitcoins and not one where the address spent bitcoins and the limit parameter to only ...
alcio's user avatar
  • 81
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 = '...
user2298995's user avatar
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 '...
Daniel's user avatar
  • 133
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 ...
Ava Chow's user avatar
  • 71k
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 / (...
hardfork's user avatar
  • 2,117
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 ...
0xb10c's user avatar
  • 1,440
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 ...
JBaczuk's user avatar
  • 7,418
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 ...
Nvest Campus's user avatar
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"];
m1xolyd1an's user avatar
  • 5,666
1 vote

Online bitcoin game

I'd advise caution, it is quite difficult to secure web wallets. What you are asking is pretty basic, when a new user registers you call your server (ie bitcoind) to create a new address, then assign ...
m1xolyd1an's user avatar
  • 5,666
1 vote
Accepted

How would I be able to show 24 open, high & low on my site made with php

A lot of the code you are sharing is unnecessary and unrelated to working with APIs in PHP. It's 3 basic steps. Define the URL of the API endpoint you want, fetch that URL in PHP, return the values ...
m1xolyd1an's user avatar
  • 5,666

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