PHP code example of uma / secp256k1-nostr

1. Go to this page and download the library: Download uma/secp256k1-nostr library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php. 
    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

uma / secp256k1-nostr example snippets




$text = '
{
  "id": "62fa167369a603b1181a49ecf2e20e7189833417c3fb49666c5644901da27bcc",
  "pubkey": "84fdf029f065438702b011c2002b489fd00aaea69b18efeae8261c44826a8886",
  "created_at": 1689033061,
  "kind": 1,
  "tags": [],
  "content": "This event was created at https://nostrtool.com/ with a throwaway key.",
  "sig": "a67e8d286605e3d7dfd3e0bd1642f85a25bb0cd70ec2ed941349ac879f617868a3ffa2a9040bb43c024594a79e4878429a990298c51ae4d6d20533589f4a04df"
}';

$event = json_decode($text);

var_dump(secp256k1_nostr_verify($event->pubkey, $event->id, $event->sig));

// Mangle last half-byte of the signature on purpose
$event->sig[127] = 'e';

var_dump(secp256k1_nostr_verify($event->pubkey, $event->id, $event->sig));


   $privateKey = bin2hex(random_bytes(32));
   $publicKey = secp256k1_nostr_derive_pubkey($privateKey);
   
shell
    $ git clone https://github.com/1ma/secp256k1-nostr-php
    $ cd secp256k1-nostr-php
    
shell
   $ echo "extension=secp256k1_nostr.so" | sudo tee -a /etc/php/8.3/cli/php.ini
   $ php -m | grep nostr
   secp256k1_nostr

   $ echo "extension=secp256k1_nostr.so" | sudo tee -a /etc/php/8.3/fpm/php.ini
   $ php-fpm8.3 -m | grep nostr
   secp256k1_nostr