I am engaged on an Altcoin, and I am getting totally different hashes for a similar hex string when hashed utilizing the HashWriter class of the bitcoin core code (27.99) and when hashed with the bcrypto lib of the JavaScript.
The difficulty is just with the hex strings, whereas numbers when hashed their hashes are matching and no issues (this proofs that the identical hashing algorithm is utilized in each bitcoin core code and the bcrypto lib in JS).
For numbers:
C++:
uint32_t timestamp = 1737835291;
HashWriter{} << st.timestamp).GetHash().GetHex(); // ends in (85b76e3a3eeff7da605b5de8349aaee931965d611fd903cb33146982e61cbb28)
JavaScript:
bcrypto.hash256(intToBytes(1737835291)).reverse().toString("hex"); // ends in (85b76e3a3eeff7da605b5de8349aaee931965d611fd903cb33146982e61cbb28)
For hex strings:
C++:
std::string hexString = "073ff90209cde3a9ce4ccd23598fd1b50e6a1fe34f30bd7240587f0bde6f65af";
(HashWriter{} << hexString ).GetHash().GetHex(); ends in (73e21e5a9038727c61aeee89c899bd45d7e935a306ede80388de131a99e14a75)
JavaScript:
bcrypto.hash256(Buffer.from("073ff90209cde3a9ce4ccd23598fd1b50e6a1fe34f30bd7240587f0bde6f65af", "hex")).reverse().toString("hex"); ends in (1ec6958d1fae90326d8abe7eb9950de366262ff80a730641a6acdac5dfc4ddfe) which is differs from the results of the C++
I’ve used a web based instrument to verify the hash of the hex (073ff90209cde3a9ce4ccd23598fd1b50e6a1fe34f30bd7240587f0bde6f65af) and received a end result that matches the results of the JavaScript (1ec6958d1fae90326d8abe7eb9950de366262ff80a730641a6acdac5dfc4ddfe)
I’ve additionally manipulated the hex strings encoding (hex, utf8/ascii) in each C++ and JavaScript and I could not discover a matching level between the resulted hashes of the 2 codes.
I’ve tried (Within the JavaScript code) to reverse the bytes of the hex string earlier than hashing it, and this ends in a unique hash however nonetheless not matching the C++ hash.
Why this occurring and the right way to get the identical hash of the hex string in each codes?
Thanks,,,
