How to get address from in-transaction

I do a quick parsing of blockchain file and there was a question on definition of a address for an input transaction.

How from the specified sriptSig calculate the address correctly?

So, scriptSig is hex:

Code:

len: 107
scriptSig: 483045022100fffc98a7bcbe7fc6d6716775794f59551e335914683fd1ed6fcdae40c68918310220763ceeb8b9bf168f75b98e4a1dd774072e8816fec384a6228b1ecbfbcbf8239d012102d939f9164fc61e89eaf18841cc13f08721ce9ef671f3751a1536a10af752881f

Code:

PUSHDATA[72] 3045022100fffc98a7bcbe7fc6d6716775794f59551e335914683fd1ed6fcdae40c68918310220763ceeb8b9bf168f75b98e4a1dd774072e8816fec384a6228b1ecbfbcbf8239d01
PUSHDATA[33] 02d939f9164fc61e89eaf18841cc13f08721ce9ef671f3751a1536a10af752881f

Is correctly that to calculate the address we first need to get from compressed key (pushdata [33]) - uncompressed by the method https://en.bitcoin.it/wiki/Secp256k1 ?

I tried this method using OpenSSL

Code:

EC_KEY* key=EC_KEY_new_by_curve_name(NID_secp256k1);
if (key)
{
  EC_KEY* r=o2i_ECPublicKey(&key, &keypart, 33);
  if (r)
  {
   EC_KEY_set_conv_form(key, POINT_CONVERSION_UNCOMPRESSED);
   char key_result[65];
   int size=i2o_ECPublicKey(key, &key_result);
  }
  EC_KEY_free(key);
}

openssl specifies that

Code:

key_result [65] = 04d939f9164fc61e89eaf18841cc13f08721ce9ef671f3751a1536a10af752881f42a2f60dd229dca9adbc86f16104a0114f8d1458fda83d4a747476d137e0fd18

-

From which I then determine the address (according to the algorithm described in https://en.bitcoin.it/wiki/Technical_background_of_version_1_Bitcoin_addresses)

but unfortunately I get the wrong 1LzATNQX57AEZ1qXKbHemS1gRxMayito1n

Quote

It's about the block #170058 https://blockexplorer.com/block/000000000000047e131d31e3cd3c8e673c117136b72fd5d67b8b1bffbde04772 and its last transaction #17 from the 1KqydgzrzK28T6rdPVoLaASp3i4BZ5CGTb (1.75723208 BTC)

that is, instead of 1KqydgzrzK28T6rdPVoLaASp3i4BZ5CGTb I get another. Sad

Topic: How to get address from in-transaction (Read 202 times)