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policy: uncap datacarrier by default

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Datacarrier output script sizes and output counts are now
uncapped by default.

To avoid introducing another startup argument, we modify the
OP_RETURN accounting to "budget" the spk sizes.

If a user has set a custom default, this results in that
budget being spent over the sum of all OP_RETURN outputs'
scripts in the transaction, no longer capping the number
of OP_RETURN outputs themselves. This should allow a
superset of current behavior while respecting the passed
argument in terms of total arbitrary data storage.

Co-authored-by: Anthony Towns <aj@erisian.com.au>
This commit is contained in:
Greg Sanders
2025-05-02 10:01:13 -04:00
parent 4b1d48a686
commit 9f36962b07
10 changed files with 64 additions and 67 deletions
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4
src/init.cpp
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@@ -632,8 +632,8 @@ void SetupServerArgs(ArgsManager& argsman, bool can_listen_ipc)
argsman.AddArg("-bytespersigop", strprintf("Equivalent bytes per sigop in transactions for relay and mining (default: %u)", DEFAULT_BYTES_PER_SIGOP), ArgsManager::ALLOW_ANY, OptionsCategory::NODE_RELAY);
argsman.AddArg("-datacarrier", strprintf("Relay and mine data carrier transactions (default: %u)", DEFAULT_ACCEPT_DATACARRIER), ArgsManager::ALLOW_ANY, OptionsCategory::NODE_RELAY);
argsman.AddArg("-datacarriersize",
strprintf("Relay and mine transactions whose data-carrying raw scriptPubKey "
"is of this size or less (default: %u)",
strprintf("Relay and mine transactions whose data-carrying raw scriptPubKeys in aggregate "
"are of this size or less, allowing multiple outputs (default: %u)",
MAX_OP_RETURN_RELAY),
ArgsManager::ALLOW_ANY, OptionsCategory::NODE_RELAY);
argsman.AddArg("-permitbaremultisig", strprintf("Relay transactions creating non-P2SH multisig outputs (default: %u)", DEFAULT_PERMIT_BAREMULTISIG), ArgsManager::ALLOW_ANY,