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First small problem: blockchair.com give me only output scripts, not input - is any blockexplorer online with it? I read binary data and this may be hard recreate my sample data and verify. I test BTC block 500186. First is coinbase tx = 

 d45f88974168a7c1d04c9501872ee04ad2a1c4ef2d855afdc2a69c69d7802543

and I don't analyse it because has not previous transactions.

 Next is a bit odd transaction =              
 95637dddd99653a6421086e6ab9326341d47f5c29a3cea521e0d2dd6b7c693b1; 


 odd because script is short:      
 1600149471ea5ecd8f6c51cbe1793df6f5c8ee1894a694

this can I also skip.

Next is 
83951f7cb7db18e22f30f319ecbfba2adfc0828a31a0df4edecb46a580c4df10

has script     
483045022100df7b1f04615972c7e9d05e9c6c176b95f1a9fc9b73e86eb6d6747336da118a4d02202021d00dab65b6000ef2fcae7525427d1dbec40a2def4196111b8b11c5247bfd012103eafee16adb27d36dc89e4aae0d1b5e0f8ddb2c9136612dc733ec65b1db128cca , 

it give me signature:  
 3045022100df7b1f04615972c7e9d05e9c6c176b95f1a9fc9b73e86eb6d6747336da118a4d02202021d00dab65b6000ef2fcae7525427d1dbec40a2def4196111b8b11c5247bfd01 
and key 
03eafee16adb27d36dc89e4aae0d1b5e0f8ddb2c9136612dc733ec65b1db128cca 
and hash of previous tx = 
132d98c0bf70264d224f8a2d19325a1f34edd5fddd387939c1f51dd9790aead5

I amd computing r and s numbers: first has 33 bytes, second 32 bytes (should be 32 + 33?)

 r =   
 2100df7b1f04615972c7e9d05e9c6c176b95f1a9fc9b73e86eb6d6747336da118a
 s = 
 2021d00dab65b6000ef2fcae7525427d1dbec40a2def4196111b8b11c5247bfd

RecoverCompact can't recover becasue is 33+22 not 32+33 bytes, if I exchange r and s, is also bad; next scripts give me s and r for example 32+32, 33+33 bytes etc. Question: 

how compute r and s ?
RecoverCompact (from Bitcoin sources) hs parameter hash - it is hash of current or previous transaction?
After recover I must obtain second array of script from frist array of script + hash?
Saku
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  • [In case it helps, here is how you get r and s from a pubkey in Python](https://bitcoin.stackexchange.com/questions/58853/how-do-you-figure-out-the-r-and-s-out-of-a-signature-using-python). – Jose Fonseca Oct 22 '19 at 16:26
  • Main problem : is CKey::Sign and CKey::SignCompact but only one CKey::RecoverCompact. It is impossible recover key from normal signing message? – Saku Oct 23 '19 at 10:41
  • @Saku you want to get the private key to Signature or you want to verify the Signature meccing with the public key? – vincenzopalazzo Oct 24 '19 at 09:00

0 Answers0