Bitcoin Stack Exchange is a question and answer site for Bitcoin crypto-currency enthusiasts. It only takes a minute to sign up.
Sign up to join this community
Anybody can ask a question
Anybody can answer
The best answers are voted up and rise to the top
I am reading these two posts 1 2, and following step by step. I almost understand, but I still have some questions.
Before signing, input script should be removed and replaced by pre locking script. In the last, SIGHASH should be appended. in this time, SIGHASH is 8 bytes(0x01000000). However, after signing, SIGHASH should also be appended. in this time(DER), SIGHASH is 1 byte(0x01), as seen in the raw transaction. So how long SIGHASH is?
in the pizza transaction, the r takes 33 bytes, whit 0x00 in the first. When i use ecdsa in python, i have to delete the first byte 0x00. So when DER process, why not just use 32 bytes.
in the pizza transaction, x and y are present together. Now lots of transaction use compressed public key. Is there any tools can make out y quickly? or any way to use ecdsa to verify signature with only x.
In here, it's said that r is x. But in pizza transaction, i don't see it.
You can get bonuses upto $100 FREE BONUS when you:
💰 Install these recommended apps:
💲 SocialGood - 100% Crypto Back on Everyday Shopping
💲 xPortal - The DeFi For The Next Billion
💲 CryptoTab Browser - Lightweight, fast, and ready to mine!
💰 Register on these recommended exchanges:
🟡 Binance🟡 Bitfinex🟡 Bitmart🟡 Bittrex🟡 Bitget
🟡 CoinEx🟡 Crypto.com🟡 Gate.io🟡 Huobi🟡 Kucoin.
Comments