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How to check if one transactions is from the same wallet (public key) as a previous one

Bitcoin Stack Exchange

Bitcoin News / Bitcoin Stack Exchange 157 Views

If the transaction in question consumes inputs that were locked to a bitcoin address that has been previously used, then it would be easy to tell that the payment came from the same wallet. After all, the payment came 'from the same address' as a previous payment.

However, re-using addresses is not best practices. Doing so is very bad for your privacy, just consider the premise of this question to understand why! There is no reason to re-use addresses and thus allow someone to see your financial history (ie, all of the other transactions you've made from that address).

Thankfully, modern wallets are built to never re-use addresses. Further, addresses from the same wallet are indistinguishable from random addresses, there is no public information included in the address/transaction that links them together. This is by design: you wouldn't want someone to be able to determine your entire wallet balance, after receiving a single transaction from you.


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