Earn Bitcoin by helping others

On BitQ&A you can get your questions answered by setting up a bounty or you can get paid by answering the community's questions.

If transaction hashes only are stored in blocks, then where is OP_RETURN data stored?

An answer to a previous question and the whitepaper both agree that blocks don’t store full transactions, but rather, transaction hashes.

So then, what if I add data in OP_RETURN, say, the text “Hello, world!” Isn’t that a transaction output, or at least contained in an output, and therefore part of a transaction?

If not, or if so and only transaction hashes, not transactions themselves persist, then how does the OP_RETURN data stay on the blockchain?

Submit an answer See answers Share on Twitter Share on Facebook

Double hash in Bitcoin

what exactly is this? Does this mean every TX gets hashed twice? How does it help to filter the content from the block chain (As Dr. Wright said)? Why cant i hash it just once and save the hash of the TX and prune the data (illegal)? Isnt the content now filtered with just a single hash? or am i getting it wrong?

Submit an answer See answers Share on Twitter Share on Facebook

Provide examples of multi-sig scripts

What are the possible Bitcoin scripts to create a multi-sig transaction? Please provide the script code with explanations.

I would like to see at least two types of such scripts explained (OP_CHECKMULTISIG and the one with conditional OP_IF statements that Steve Shadders showed at this CoinGeek Seoul presentation). If there are more options, please list them as well.

Submit an answer See answers Share on Twitter Share on Facebook

How does IP2IP work?

I heard a lot of discussions mentioning IP2IP at the recent CoinGeek conference in Seoul. I really like the idea of users exchanging transactions peer-to-peer, but I am wondering how IP2IP works on a technical level?

Does it require a daemon/service running on the recipient’s computer that listens for incoming transactions or is there some other approach?

Submit an answer See answers Share on Twitter Share on Facebook

What is the most interesting/exciting script that was made possible by the Genesis upgrade?

Non-standard scripts can finally be used without limits on the Bitcoin SV blockchain thanks to the Genesis upgrade. We think that this will accelerate the innovation and we will soon see a variety of new scripts being used on a regular basis.

What is the one that is the most exciting, interesting and/or powerful in your opinion? Which new use cases will it enable?

Submit an answer See answers Share on Twitter Share on Facebook
Made with in Slovenia.