From b1385852ef2ba45fd6926d75497646debf79e686 Mon Sep 17 00:00:00 2001 From: Alex Morcos Date: Mon, 17 Jul 2017 06:52:09 -0400 Subject: Remove factor of 3 from definition of dust. This redefines dust 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. --- src/init.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'src/init.cpp') diff --git a/src/init.cpp b/src/init.cpp index 1e85642019..bda0e905b3 100644 --- a/src/init.cpp +++ b/src/init.cpp @@ -479,7 +479,7 @@ std::string HelpMessage(HelpMessageMode mode) if (showDebug) { strUsage += HelpMessageOpt("-acceptnonstdtxn", strprintf("Relay and mine \"non-standard\" transactions (%sdefault: %u)", "testnet/regtest only; ", defaultChainParams->RequireStandard())); strUsage += HelpMessageOpt("-incrementalrelayfee=", strprintf("Fee rate (in %s/kB) used to define cost of relay, used for mempool limiting and BIP 125 replacement. (default: %s)", CURRENCY_UNIT, FormatMoney(DEFAULT_INCREMENTAL_RELAY_FEE))); - strUsage += HelpMessageOpt("-dustrelayfee=", strprintf("Fee rate (in %s/kB) used to defined dust, the value of an output such that it will cost about 1/3 of its value in fees at this fee rate to spend it. (default: %s)", CURRENCY_UNIT, FormatMoney(DUST_RELAY_TX_FEE))); + strUsage += HelpMessageOpt("-dustrelayfee=", strprintf("Fee rate (in %s/kB) used to defined dust, the value of an output such that it will cost more than its value in fees at this fee rate to spend it. (default: %s)", CURRENCY_UNIT, FormatMoney(DUST_RELAY_TX_FEE))); } strUsage += HelpMessageOpt("-bytespersigop", strprintf(_("Equivalent bytes per sigop in transactions for relay and mining (default: %u)"), DEFAULT_BYTES_PER_SIGOP)); strUsage += HelpMessageOpt("-datacarrier", strprintf(_("Relay and mine data carrier transactions (default: %u)"), DEFAULT_ACCEPT_DATACARRIER)); -- cgit v1.2.3