Create an invoice and one time use bitcoin wallet

I am looking for transaction code that will have multiple output, including an opreturn that I can send to a customer as an invoice who signs the transaction.

In other words, I want to create a transaction using their account for input and they need to use their signature. Once paid, do a sendmany transaction of differing amounts to as many as 5 recipient addresses. I have not yet tried anything because all documentation assumes that I want the bitcoin to come to my bitcoin wallet, which I do not. Can anybody advise me on how to do this? Thanks!

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Bitcoin Price Consolidating At $650

Bitcoin price, that old rascal, had shook out a lot of longs to $ 650 and is now building base waves, to $ 650, for a pending launch toward the June top. This analysis is provided by xbt.social with a 3-hour delay. Read the full analysis here. Not a member? Join now and receive a $ 29 discount […]

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cant delete old version Bitcoin-QT mac OS X

Here I am again. I’ve downloaded the update version of Bitcoin Core. But the Old Bitcoin-QT version v0.8.6 is still shown @ my programs. When I click this program it says that it can’t be opened.

I can open the new version that I’ve downloaded, but this one I don’t see @ my programs.( I have to open the .dmg file everytime to install/open) When I open it I see that my transaction from last Friday is still unconfirmed (And I still don’t see anything at the receive address on my Kraken account:( ) I feel really stressed and don’t know what to do to have my BTC back. Does somebody maybe know maybe whats going on?

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How a block is defined (size, number of transactions)?

When reading somes charts here: https://blockchain.info/en/charts, I leart that:

  • The average size of a block a globally increasing (max=1MB).
  • The number of transactions in one block is also increasing.

After reading some related articles, is that right to say that

  • one block is defined (solved) by mining. If I have a super powerful computer, I can mine so quickly that one block will only contain one transaction. (it is to understand if there is a link between the number of transaction).
  • the transactions in the same block are not linked between each other. So miners do solve one transaction, but one block.

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Dutch Government Invests in a Blockchain Development Campus

Netherlands will the unveiling of a blockchain “campus” in September wherein banks and financial companies will work together for the development of blockchain applications for payments and the wider financial industry. Willem Vermeend, the Secretary of Finance and Minister of Social Affairs in Netherlands has revealed that the country will open a blockchain-centric campus in […]

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How can the number of unique addresses decline?

Blockchain.info has various charts over time, including one for “unique addresses”. They do not explain what it means, but presumably it is the number of unique addresses that appear in all transactions in the blockchain.

If this is true, then I would expect the number of unique addresses to keep going up indefinitely. How could the number of unique address decline?

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