If you have recently received a very small amount of BTC in your wallet unexpectedly, you may be the target of a “dusting attack” designed to deanonymise you by linking your inputs together – Samourai users can mark this utxo as “Do Not Spend” to nip the attack in the bud.

If you have recently received a very small amount of BTC in your wallet unexpectedly, you may be the target of a "dusting attack" designed to deanonymise you by linking your inputs together - Samourai users can mark this utxo as "Do Not Spend" to nip the attack in the bud. submitted by /u/DesignerAccount
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Bitcoin – The Currency of the Internet

PR: Multiversum: 4th Generation Relational Blockchain Supporting Biometric Inputs (news.bitcoin.com)

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You probably remember a strong, purportedly unbreakable padlock being used to secure a safe box to, well, keep it safe! These could be breached, so pin-locks were developed. These, too…

Bitcoin

panic: just got 13 BTC scammed but transaction still unconfirmed need to confirm my transaction with same inputs (reddit.com)

… it replaced the bitcoin address when i copy pasted. i do not how this happened. this transaction should not go through: https://blockchain.info/tx/2c085335142cd70111bde1c8ab00ffae78dd726cebb3c09858ebf24945530f96 i made a new transaction with the same inputs, can any miner mine this?…

Bitcoin

inputs getting smaller

noob here,

am I right in thinking that as bitcoin matures, the average size of transactions, i.e. kb per n BTC, will go up as all the coin gets increasingly spent so that any sizable payment will ultimately end up being made up of increasingly large numbers of smaller inputs, and that this will contribute to the rate at which the blockchain size increases, on top of general total transaction increases over time.. ? With the current large mempool size and delays in getting transactions accepted for mining, except with big fees per kb, will this lead to increasingly large fees to send payments in a timely way or longer delays ??

Thanks

Recent Questions – Bitcoin Stack Exchange

Can transaction inputs reference outputs of pending transactions?

The inputs of a transaction reference outputs of previous transactions. These previous transactions

  • must already be present in the block chain, or
  • can also be pending transactions?

I don’t know if the term pending transactions has some meaning I’m not aware of. In this context, I mean transactions that are not yet in the block chain, but are present in the block containing the new transaction.

Example: A particular block B contains multiple transactions including a transaction X and a transaction Y. The transaction X references the output(s) of transaction Y. Transaction Y is not yet in the block chain, but it is present in block B as well. Is this possible since transaction Y is not yet confirmed?

Note: I’m not using the term unconfirmed transaction because as I understand these are transactions not appearing in any block; and in this case transaction Y would be in a block, the same block as transaction X.

Recent Questions – Bitcoin Stack Exchange

How would be the fastest way to query for a certain txid to get its inputs?

I am working in an artistic/visualization project that analyses Bitcoin transactions. I have a Bitcore instance with insight API and from a Python script I query through the REST API so the queries are returned in json format. For the project I use a macbook pro and with its internal ssd drive I get around 70 queries per second, using an external NTFS (fuse drivers) driver I get as little as 5 per second.

I would like to know if there is a faster way to query transactions by transaction’s hash even if it is more complex to code.

What would be the fastest way to query for a certain txid to get its inputs?

Recent Questions – Bitcoin Stack Exchange

Which Bitcoin wallet can be programmed to partition Bitcoins based on different user inputs?

What is the process or mechanics to buy Bitcoin and other cryptocurrencies over the internet and then resell them as a point of sale?

For example, https://www.canadianbitcoins.com/ provides an option to buy BTC with Canadian Debit cards via INTERAC.

Such businesses source their Bitcoins from Bitcoin Exchanges. Do you know how they partition their Bitcoins into the amount the customer requests based on their exchange rate?

Recent Questions – Bitcoin Stack Exchange