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Title: Need Patch: Reject TX if calculated Fee is too high!! Post by: niceWoman25 on July 02, 2014, 08:36:04 PM I would like to tweak or write a small patch for linux bitcoind. Can you please help me?
I do send transactions by RPC like sendtoaddress from my web application to the bitcoind daemon. The problem is, I cant really control the fees. On some occasions, the fee gets too high because of dust. Which I do not want. And now I would like to hard code a limit into bitocoind (bitcoincore) to reject a (per RPC transmitted) transaction IF the internally calculated fee is above a limit like: 0.01 BTC. And the RPC command should then just throw an error like: err, calculated fee is higher than hardcoded limit of 0.01 BTC. It mus be easy to code that. I assume there are only a couple of c++ lines necessary. Could you please write it for me ? Title: Re: Need Patch: Reject TX if calculated Fee is too high!! Post by: gmaxwell on July 02, 2014, 10:32:17 PM On some occasions, the fee gets too high because of dust. Which I do not want. And now I would like to hard code a limit into bitocoind (bitcoincore) to reject a (per RPC transmitted) transaction IF the internally calculated fee is above a limit like: 0.01 BTC. In the current codebase any transaction will be rejected if the transaction is >100k. 100kB times the base fee for non-free transactions is 0.001, so unless you've increased your fees there is already a hard limit ten times lower than you asked for.Title: Re: Need Patch: Reject TX if calculated Fee is too high!! Post by: niceWoman25 on July 03, 2014, 05:24:10 AM thanks, I will look that up in the source code.
The reason why I am asking is, that I am also using altcoins. Like litecoin. And the fees are different among the forks. But if I could implement a code snippet into some of these forks to implement a hardlimit on fee it would be interesting. Title: Re: Need Patch: Reject TX if calculated Fee is too high!! Post by: domob on July 03, 2014, 06:24:18 AM Seems like a potentially useful feature, although I agree with gmaxwell that it may not be so useful (except for enforcing lower limits or for other coins with changed settings) for Bitcoin as-is. As I'd be interested to get into development for Bitcoin Core (so far I'm working on Namecoin), I can write such a patch - but I think we should discuss first what the core dev's think about it unless the change would be a waste of time and never merged. ;)
Title: Re: Need Patch: Reject TX if calculated Fee is too high!! Post by: kjj on July 05, 2014, 11:32:31 AM Just use the raw transaction API if you want fine control over fees.
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