function get_address($publickey) {
// step 1
$step1=hexStringToByteString($publickey);
// step 2
$step2=hash("sha256",$step1);
// step 3
$step3=hash('ripemd160',hexStringToByteString($step2));
// step 4
$step4="00".$step3;
// step 5
$step5=hash("sha256",hexStringToByteString($step4));
// step 6
$step6=hash("sha256",hexStringToByteString($step5));
// step 7
$checksum=substr($step6,0,8);
// step 8
$step8=$step4.$checksum;
// step 9
// base conversion is from hex to base58 via decimal.
// Leading hex zero converts to 1 in base58 but it is dropped
// in the intermediate decimal stage. Simply added back manually.
$step9=bc_base58_encode(bc_hexdec($step8));
return $step9;
}
function hexStringToByteString($hexString){
$len=strlen($hexString);
$byteString="";
for ($i=0;$i<$len;$i=$i+2){
$charnum=hexdec(substr($hexString,$i,2));
$byteString.=chr($charnum);
}
return $byteString;
}
// BCmath version for huge numbers
function bc_arb_encode($num, $basestr) {
if( ! function_exists('bcadd') ) {
Throw new Exception('You need the BCmath extension.');
}
$base = strlen($basestr);
$rep = '';
while( true ){
if( strlen($num) < 2 ) {
if( intval($num) <= 0 ) {
break;
}
}
$rem = bcmod($num, $base);
$rep = $basestr[intval($rem)] . $rep;
$num = bcdiv(bcsub($num, $rem), $base);
}
return $rep;
}
function bc_arb_decode($num, $basestr) {
if( ! function_exists('bcadd') ) {
Throw new Exception('You need the BCmath extension.');
}
$base = strlen($basestr);
$dec = '0';
$num_arr = str_split((string)$num);
$cnt = strlen($num);
for($i=0; $i < $cnt; $i++) {
$pos = strpos($basestr, $num_arr[$i]);
if( $pos === false ) {
Throw new Exception(sprintf('Unknown character %s at offset %d', $num_arr[$i], $i));
}
$dec = bcadd(bcmul($dec, $base), $pos);
}
return $dec;
}
// base 58 alias
function bc_base58_encode($num) {
return bc_arb_encode($num, '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz');
}
function bc_base58_decode($num) {
return bc_arb_decode($num, '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz');
}
//hexdec with BCmath
function bc_hexdec($num) {
return bc_arb_decode(strtolower($num), '0123456789abcdef');
}
function bc_dechex($num) {
return bc_arb_encode($num, '0123456789abcdef');
}
а для этого не нужно базу блоков делать с индексом :
тоесть bitcoin-qt НЕ нужно запустить с параметром '-txindex 1' ?