How is merkle tree and merkle root calculated?
How to calculate a merkle tree? What is “merkle proof” and how does it fit into the SPV? How does one validate a merkle proof? And how all that affects Bitcoin?
We are looking for ideas about how could Bitcoin help us to fight the Coronavirus (or any future) pandemic.
Think about ways Bitcoin could help individuals through this, but also about how it could help health care systems to more efficiently cope with increased number of cases.
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?
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?
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?
Asking for a friend…….
In Christianity, suppose my wife passes away.
We had always considered ourselves “soul mates” who would be reunited in heaven.
I meet someone else, fall in love, and marry wife number 2. My love for number 2 seems to be just as strong as wife number 1…..I consider her also to be my soul mate?
How is this resolved in Christian heaven? Who will I spend eternity with?