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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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6
test/functional/test_framework/messages.py
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@@ -73,8 +73,10 @@ WITNESS_SCALE_FACTOR = 4
DEFAULT_ANCESTOR_LIMIT = 25 # default max number of in-mempool ancestors
DEFAULT_DESCENDANT_LIMIT = 25 # default max number of in-mempool descendants
# Default setting for -datacarriersize. 80 bytes of data, +1 for OP_RETURN, +2 for the pushdata opcodes.
MAX_OP_RETURN_RELAY = 83
# Default setting for -datacarriersize.
MAX_OP_RETURN_RELAY = 100_000
DEFAULT_MEMPOOL_EXPIRY_HOURS = 336 # hours