sry amaclin, i post some info...
Public key is a pair [x,y]
if 'y' is even - use 0x02
if 'y' is odd - use 0x03
Code:
buf [0] = 0x02 + ( buf [64] & 1 );
Topic: compressed pubkey version (Read 647 times)
Public key is a pair [x,y]
if 'y' is even - use 0x02
if 'y' is odd - use 0x03
sry amaclin, i post some info...
How to know when to use version 02 or 03 in a compressed pubkey?
Code:
const QByteArray MyKey32::getPublicKeyClassic ( ) const
{
quint8 buf [65];
getPublicKey ( buf );
//buf [0] = 0x04;
return QByteArray ( (const char*)buf, 65 );
}
//--------------------------------------------------------------
const QByteArray MyKey32::getPublicKeyCompressed ( ) const
{
quint8 buf [65];
getPublicKey ( buf );
buf [0] = 0x02 + ( buf [64] & 1 );
return QByteArray ( (const char*)buf, 33 );
}
How to know when to use version 02 or 03 in a compressed pubkey?
let me explain:
in the bitcoin qt, i type the command dumpprivkey in my address 1Cue...
he gave me the key Kw...
but making some tests, with version 02, i got the address 1Nra...
and with the version 03, the 1Cue...
let me explain:
in the bitcoin qt, i type the command dumpprivkey in my address 1Cue...
he gave me the key Kw...
but making some tests, with version 02, i got the address 1Nra...
and with the version 03, the 1Cue...
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