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.
Why mix IP2IP and SPV? What is SBV? Practical use and advantages?
I would like to introduce my stakeholders to a signup process into our bitcoin systems and I would like to have a landing page where I could make my own moneybutton signup process to receive the MBID in my system in order to send a token for that specific signup part. My goal would be have follow up ages where they provide more and more information for the exchange of API information tokens. Questions: Could it be tokens with a unique identifier that can only be used with the owner of MBID and associated tokenID in order to progress to the next page? In what way could a datapoint be statistically useful and still keep its full privacy? Each interest group like opensource@moneybutton.com is initiated and funded with $ 50 as ideating tokenholder under thefastcompany@moneybutton.com.
I have some code that does a lot of HD derivation and ECIES encryption/decryption and I noticed that it runs quite slow in the browser. I did some profiling and it seems that it spends most of the time in the libraries that handle primitives (sha256 hashing, big int, …).
This makes sense as it seems that we have this primitives natively in node, but we need to use libraries in the browser. I did some Googling and it seems that newer browsers do have some support for this things so I was wondering if it is possible to use that when available? I suspect that would speed up things significantly?
I am thinking about browser’s native APIs such as SubtleCrypto and BigInt. Or even an Emscripten-compiler Javascript library such as js-nacl.
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?
I want to display a BSV address, set up and display a funding goal with a progress bar.
As soon as a transaction happen the balance should be live updated and the progress bar should indicate the progress. I have no clue how to set up this. Who can give me a simple code for this?
Thanks.
I would like to run Bitcoin SV software on MacOS, but I noticed that there are no binaries available. How to compile it on MacOS? Are there any alternatives that do not require compilation from scratch?
Is there a way to programatically post a Twetch? If yes, how should one do it?
Is it possible to get a current unspent transaction outputs set from a Bitcoin node? Or more generally, is it possible to get a UTXO set at an arbitrary block height?
If not possible through a node, is there any other solution that provides that?
One can ask Bitcoin SV not to provide a proof that a given transaction was included in a block. E.g.:
➜ bitcoin-cli gettxoutproof '["ea32120687851afe3418ab3642af94a4c69684e4b87f8a529807489e09d74ec5"]'
00008020044b32cb5a9d9c5a4d8df9b7d3db277897cd3326900ffb0200000000000000009c34e7a224a4aab8df6a82bf29710a343e000ec5494348ff1a4cf028e55ec81035a1f85dbc10071870a3284fea2400000f98e8f40fdb92f5359abf62b6a56dc03adf7da95390635c2e5e4fafbbee3f753dc54ed7099e480798528a7fb8e48496c6a494af4236ab1834fe1a8587061232ea86f9873bc1bbb24ff46e666c5370ac4b51ca3f5a0ffd03e0713c7be7612e9f610f245966d85fa863a32038e349aaf1b63ccde8b89b395aa2494fa0540d11cf183ef019baee80e4f38fcf2fe3bc23619e3d6edec65dfd2ab452f186e922492ffb668dbc25e8be0c6050247399209dfdda4934cca52f02c399d0fd6dc97c23b4615d4e9ffb22c3de0b35e8dcecb3aa23007defa4ec8e105af05dc87108ded9dccc3b80e338ba14f4390cc5c775c7fba36590bd460f3601e64b8ab55cae0a71f1224f06f0b18a11596a37a49fab86c2a7764b92f114aacad9853b8bea7f23283076cefc60d6f7f600e8d1e32342e8169e49523917c6b9b8ad7931edff1f876ae7c0a149ee3ea75ba806c441f772cbd7fb326f4b0f13b891a364a7399805749bc38016016d6a64aefe4bc7fe48f4ca8bd6f766edb0fdb183d9ba0df7f58dd280692da7dd94048aab0b5b0ebfc83066e85cc8d2cabb133739b872fb4312db5fad41e6e7d55fb7d9addfd810a561ed49634225cd88d2a04638fdc8efaf0d6044e78bdf09455aab9b4d25a5c60cac2376237b064b10b88081f52d241fff4a2d35b464f504ffdf0000
Proof can be verified using the verifytxoutproof RPC command, but let’s say I would like to verify the proof in a custom application that does not have access to a Bitcoin node.
How can I decode the proof HEX blob? What data is part of it and how can I get block, merkle proof and transaction information from it?
