Are there still possible scenarios for transaction replays from Bitcoin Cash or vice versa?

I have three questions with regard to replay protection.

Q1 => Some non-standard scripts (like x + 2 = 5) do not require signatures (so naturally no SIGHASH_FORKID) to spend the UTXOs. Are these UTXOs and transactions still prone to replays?

Q2 => I have read the documents from the inception of Bitcoin Cash and realized that the legacy transaction digest algorithm is not being used anymore. From my understanding, the 4-byte sighash type is appened at the rear of the digested transaction input (Both for SigVersion::BASE and SigVersion::WITNESS_V0) and if a unique sighash flag is used, the uint256 SignatureHash result would be completely different. The SignatureHash function in the src/script/interpreter.cpp file of Bitcoin Cash only allows BIP-143 digest algorithm when SIGHASH_FORKID is in use. What if Bitcoin Cash developers only enforced the use of SIGHASH_FORKID and embraced Segwit? Is a unique sighash flag not enough to prevent replays?

Q3 => If a unique sighash flag (SIGHASH_FORKID) is not enough to prevent replays, then is it because of the malleability issue on legacy transactions?



from Recent Questions - Bitcoin Stack Exchange https://ift.tt/0TG3EdC
via IFTTT

Popular posts from this blog

Do Kwon’s Detention Prolonged Until 2024 As Montenegro Responds To Extradition Requests

Image
According to an International Business Times report , Montenegro’s Supreme Court decided to extend the detention of TerraForm Labs founder and CEO Do Kwon until February 2024, following extradition requests from the United States and South Korea. Closed-Door Discussions Reveal Montenegro’s Plan For Do Kwon Initially set to be extradited to the US on December 15, Do Kwon’s fate turned when the Montenegrin High Court ruled to prolong his stay until February 15, 2024. The decision stems from charges related to the collapse of the TerraUSD stablecoin, which led to significant financial losses. The High Court had previously ordered Kwon’s extradition by Friday, but his defense team appealed the decision in the appellate court in Podgorica, the capital of Montenegro. The Montenegrin Court of Appeal confirmed that Kwon contested the High Court’s ruling, vehemently stating, “I do not submit to the court’s decision.” Recent reports indicate that Montenegro’s Justice Minister, Andrej Mil...
Read more

Sam Bankman-Fried Trial Begins Tomorrow: 3 Reasons Ex-SEC Official Foresees Conviction

Image
The trial of Sam Bankman-Fried, the founder of cryptocurrency exchange FTX and hedge fund Alameda Research, is set to commence in New York on Tuesday, October 3.  This comes almost a year after the collapse of both FTX and Alameda Research. The events leading up to the trial paint a picture of alleged fraudulent activities and money laundering that caused significant damage to the businesses involved. Ex-SEC Official’s Bleak Prediction As Sam Bankman-Fried Trial Commences In a nutshell, Alameda Research purportedly took customer deposits from FTX and invested them in fictitious crypto tokens, which derived their value from the confidence in FTX’s operations.  When this confidence waned, FTX and Alameda Research suffered substantial losses, which many argue contributed to a broader disillusionment in the cryptocurrency industry.  Following an investigation, federal authorities uncovered numerous alleged crimes, leading to seven federal fraud and money-laundering cha...
Read more

April’s Crypto Game-Changers: 7 Events Set To Drastically Impact The Course Of Digital Currencies

Image
As the crypto market ended March positively, the industry gears up for an eventful April, marked by crucial developments and milestones that could significantly impact the digital asset landscape.  Crypto Halvings And Regulatory Deadlines The month starts with the Bitcoin Cash (BCH) halving event scheduled for April 2nd. Similar to Bitcoin (BTC), BCH undergoes a halving approximately every four years, which reduces mining profits for BCH miners.  On April 10, the US is scheduled to announce March’s Consumer Price Index (CPI), a vital indicator that measures the average price change paid by urban consumers for a basket of goods and services.  The Federal Reserve closely monitors the CPI as it influences inflation and, consequently, the central bank’s decisions regarding interest rates. Any changes in interest rates can ripple effect on the overall crypto market performance. April 19 marks the deadline for the US Securities and Exchange Commission (SEC) and US crypto...
Read more