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| author | Wladimir J. van der Laan <laanwj@gmail.com> | 2019-07-19 19:56:12 +0200 |
|---|---|---|
| committer | Wladimir J. van der Laan <laanwj@gmail.com> | 2019-07-19 20:00:12 +0200 |
| commit | 51a6e2c4192913c9c18507d8dfb3302500b26cc3 (patch) | |
| tree | ed1f4ddc01217aa66b0359d11a8b28e488e72e85 /src/validation.h | |
| parent | f4b1fe7165c84d7ed4ef84cac7e0dc6804973fa5 (diff) | |
| parent | 50cede3f5a4d4fbfbb7c420b94e661a6a159bced (diff) | |
Merge #15681: [mempool] Allow one extra single-ancestor transaction per package
50cede3f5a4d4fbfbb7c420b94e661a6a159bced [mempool] Allow one extra single-ancestor transaction per package (Matt Corallo)
Pull request description:
This implements the proposed policy change from [1], which allows
certain classes of contract protocols involving revocation
punishments to use CPFP. Note that some such use-cases may still
want some form of one-deep package relay, though even this alone
may greatly simplify some lightning fee negotiation.
[1] https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2018-November/016518.html
ACKs for top commit:
ajtowns:
ACK 50cede3f5a4d4fbfbb7c420b94e661a6a159bced -- looked over code again, compared with previous commit, compiles, etc.
sdaftuar:
ACK 50cede3f5a4d4fbfbb7c420b94e661a6a159bced
ryanofsky:
utACK 50cede3f5a4d4fbfbb7c420b94e661a6a159bced. Changes since last review: adding EXTRA_DESCENDANT_TX_SIZE_LIMIT constant, changing max ancestor size from 1,000,000 to nLimitAncestorSize constant (101,000), fixing test comment and getting rid of unused test node.
Tree-SHA512: b052c2a0f384855572b4579310131897b612201214b5abbb225167224e4f550049e300b471dbf320928652571e92ca2d650050b7cf39ac92b3bc1d2bcd386c1c
Diffstat (limited to 'src/validation.h')
| -rw-r--r-- | src/validation.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/validation.h b/src/validation.h index 7739d3de4a..d747fdbf27 100644 --- a/src/validation.h +++ b/src/validation.h @@ -64,6 +64,12 @@ static const unsigned int DEFAULT_ANCESTOR_SIZE_LIMIT = 101; static const unsigned int DEFAULT_DESCENDANT_LIMIT = 25; /** Default for -limitdescendantsize, maximum kilobytes of in-mempool descendants */ static const unsigned int DEFAULT_DESCENDANT_SIZE_LIMIT = 101; +/** + * An extra transaction can be added to a package, as long as it only has one + * ancestor and is no larger than this. Not really any reason to make this + * configurable as it doesn't materially change DoS parameters. + */ +static const unsigned int EXTRA_DESCENDANT_TX_SIZE_LIMIT = 10000; /** Default for -mempoolexpiry, expiration time for mempool transactions in hours */ static const unsigned int DEFAULT_MEMPOOL_EXPIRY = 336; /** Maximum kilobytes for transactions to store for processing during reorg */ |