jburke's HackMiami6 (2018) Conference Scripts

bitcoinphp.php

<?php
 //Examples: Wedding - 693848d56098a0ad16736bea7f24336c9b47a7f0a6f776659e8d01f00b46af76
 $GLOBALS['P2PKH_Count'] = 0;
 $transaction_id = $argv[1];
 if($argv[0] == "bitcoinphp.php"){
        $url = "https://blockchain.info/tx/$transaction_id?show_adv=true&format=json";
        $result = file_get_contents($url);
        $resultJSON = json_decode($result, true);
 }
 function hex2str($hex) {
        #echo $hex."\n";
        $str2 = substr($hex, 4);
        $hex = $str2;
        unset($str2);
        $str = '';
        for($i=0;$i<strlen($hex);$i+=2) $str .= chr(hexdec(substr($hex,$i,2)));
        return $str;
 }
 function stripAndDecode($hash){
        //uncomment below and comment out echo $code in fetchPotentialMSG to inspect hex
        #echo "\t".$hash."\n";
        $fileOpcode = "76a914";
        $pos = strpos($hash, $fileOpcode);
        if($pos === false){
                $str2 = substr($hash, 6);
                $hash = $str2;
                unset($str2);
                $str3 = substr($hash, 0, -4);
                $hash = hex2str($str3);
                unset($str3);
                return $hash;
        }else{
                $GLOBALS['P2PKH_Count'] += 1;
                if($GLOBALS['P2PKH_Count'] > 1){
                        #echo "P2PKH, terminating... run decode.php instead\n";
                        exit;
                }else{
                        #echo "Normal EOF Hit... terminating...\n";
                }
        }
 }
 function fetchPotentialMSG($resultJSON){
        $outgoing_transaction = $resultJSON['out'];
        foreach($outgoing_transaction AS $this_transaction){
                if($this_transaction['value'] == 0){
                        $code = $this_transaction['script'];
                        #echo "\n".hex2str($code)."\n";
                }else{
                        $code = $this_transaction['script'];
                        if(isset($code)){
                                $code = stripAndDecode($code);
                                if(!(is_null($code))){
                                        #echo $code."\n";
                                }
                        }
                }
        }
}
fetchPotentialMSG($resultJSON);
?>

decode.php

<?php
 $transaction_id = $argv[1];
 $url = "https://blockchain.info/tx/$transaction_id?show_adv=true&format=json";
 $result = file_get_contents($url);
 $resultJSON = json_decode($result, true);
 function hex2str($hex){
        //uncomment below and comment out echo $code in fetchPotentialMSG to inspect hex
        #echo "\t".$hex."\n\n";
        $str = '';
        for($i=0;$i<strlen($hex);$i+=2) $str .= chr(hexdec(substr($hex,$i,2)));
        return $str;
 }
 function fetchPotentialMSG($resultJSON){
        $outgoing_transaction = $resultJSON['out'];
        foreach($outgoing_transaction AS $this_transaction){
                $code = $this_transaction['script'];
                $str2 = substr($code, 6);
                $code = $str2;
                unset($str2);
                $str3 = substr($code, 0, -4);
                $code = hex2str($str3);
                unset($str3);
                echo $code;
        }
 }
fetchPotentialMSG($resultJSON);