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Merge #10817: Redefine Dust and add a discard_rate
f4d00e6 Add a discard_rate (Alex Morcos) b138585 Remove factor of 3 from definition of dust. (Alex Morcos) Pull request description: The definition of dust is redefined to remove the factor of 3. Dust is redefined to be the value of an output such that it would cost that value in fees to (create and) spend the output at the dust relay rate. The previous definition was that it would cost 1/3 of the value. The default dust relay rate is correspondingly increased to 3000 sat/kB so the actual default dust output value of 546 satoshis for a non-segwit output remains unchanged. This commit is a refactor only unless a dustrelayfee is passed on the commandline in which case that number now needs to be increased by a factor of 3 to get the same behavior. -dustrelayfee is a hidden command line option. Note: It's not exactly a refactor due to edge case changes in rounding as evidenced by the required change to the unit test. A discard_rate is added which defaults to 10,000 sat/kB Any change output which would be dust at the discard_rate you are willing to discard completely and add to fee (as well as continuing to pay the fee that would have been needed for creating the change) This would be a nice addition for 0.15 and I think will remain useful for 0.16 with the new coin selection algorithms in discussion, but its not crucial. It does add translation strings, but we could (should?) avoid that by hiding the option Tree-SHA512: 5b6f655354d0ab6b8b6cac1e8d1fe3136d10beb15c6d948fb15bfb105155a9d03684c6240624039b3eed6428b7e60e54216cc8b2f90c4600701e39f646284a9b
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