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This tag should be used for questions relating to the protocols by which cryptocurrencies are transferred. This includes the network protocol and consensus rules.

0 votes

Do any Virtual Currencies use coins that have an expiration date?

I remember some altcoin that discouraged hoarding by having the coins gradually lose value over time. That way when you get them you'll spend them as soon as possible. But I forget which one it was. …
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2 votes
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How get address from pk_script?

See the wiki. Basically you have to extract the 20 byte pubKeyHash (shown as bytes to push) from the scriptPubKey and convert it to Base58 (which is also described in the wiki. There is no need to be …
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1 vote

Can a Bitcoin transaction have the same address for input and output?

You can even have a transaction with only 1 input and 1 output, both being the same address
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3 votes
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Is it possible to definitely lose bitcoins?

Yes it's possible to lose bitcoins forever. There are even ways to "provably destroy" them by sending them to an address that can't possibly have a private key.
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