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zcash / zips

Zcash Improvement Proposals
https://zips.z.cash
MIT License
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[ZIP 2002] Include the fee explicitly in the transaction format. #805

Open bitcartel opened 7 years ago

bitcartel commented 7 years ago

Software should help users. When it comes to fee selection, it should be very hard to make mistakes. The current transparent fee computation (inherited from upstream) - input value less output value - is prone to user error. It is very easy to forget to add an output for a change address, make a calculation error, mix up units etc.

https://bitcointalk.org/index.php?topic=1818791.0 (Bitcoin network, March 8, 2017)

Please help, please, I sent a transaction with a $3000 fee by mistake, I can't afford to lose this much I am saving for college Please help anyone https://blockchain.info/tx/4d45a14ee7320b97bafd550d60df1a1be524f3cfc8ca1ea6295279eeb7026aff What can I do?

daira commented 7 years ago

I thought there was an "absurdly high fee" safety check?

In any case, I'm in favour of fixed fees for both privacy and simplicity. Now that we've reduced the free transaction threshold, there's no reason not to just use a fixed fee of 0.0001 ZEC (currently about 0.3 US cents) for all transactions.

zookozcash commented 6 years ago

Related: https://github.com/zcash/zcash/issues/2942

radix42 commented 6 years ago

I don't want fixed fees..... I personally always double it on txns with a JoinSplit, for instance, and they get mined the next block.....leave it at the default, and not always

Just as a for instance.....and I do make frequent use of the inherited "sendtoaddress" command a lot too, and that cli command does seem to have sane defaults... so I am not sure what this is contemplating changing?

radix42 commented 6 years ago

ah ok yeah now that I've read zcash/zcash#2942, THAT one makes sense

nuttycom commented 1 year ago

In the case that we create a V6 transaction format, we should change the fee behavior to make a consensus rule that the explicitly included fee matches the one calculated according to the current rules. (with @daira)

teor2345 commented 1 year ago

In the case that we create a V6 transaction format, we should change the fee behavior to make a consensus rule that the explicitly included fee matches the one calculated according to the current rules. (with @daira)

This would also be very helpful for Zebra's parallel transaction verification. We could check explicit fees in transactions and blocks in parallel, and then check each transaction's inputs provide the specified fee in series.

nuttycom commented 2 weeks ago

Reopened as the merged draft ZIP pr doesn't guarantee NU7 inclusion.

str4d commented 1 week ago

The ZIP Editors (me, @nuttycom, @conradoplg, @arya2) agree that the ZIP draft as-written is an Update ZIP, and have assigned it ZIP 2002.