Make transactions larger than 100K non-standard #2273

1. 
   gavinandresen commented at 10:17 pm on February 4, 2013: contributor

   Extremely large transactions with lots of inputs can cost the network almost as much to process as they cost the sender in fees.

   We would never create transactions larger than 100K big; this change makes transactions larger than 100K non-standard, so they are not relayed/mined by default. This is most important for miners that might create blocks larger than 250K big, who could be vulnerable to a make-your-blocks-so-expensive-to-verify-they-get-orphaned attack.

2. 
   gavinandresen commented at 10:25 pm on February 4, 2013: contributor

   FYI:

   In the last 1,000 blocks, there was exactly 1 transaction larger than 100,000 bytes: http://blockexplorer.com/tx/454f61695d3fb320cc538003b9c8ca1ba982eb7cd71abe8c9ecc02a1f843da1f

3. 
   gmaxwell commented at 10:28 pm on February 4, 2013: contributor

   ACK. … that >100k example is a nice utxo set cleaner, I’m sad to not see more of those!
4. 
   BitcoinPullTester commented at 2:07 am on February 5, 2013: none

   Automatic sanity-testing: PASSED, see http://jenkins.bluematt.me/pull-tester/0b377f4ee36d9468b63ec5c207f281b1f2003f49 for binaries and test log.
5. 
   sipa commented at 9:36 am on February 5, 2013: member

   ACK
6. Make transactions larger than 100K non-standard

   Extremely large transactions with lots of inputs can cost the network
   almost as much to process as they cost the sender in fees.
   
   We would never create transactions larger than 100K big; this change
   makes transactions larger than 100K non-standard, so they are not
   relayed/mined by default. This is most important for miners that might
   create blocks larger than 250K big, who could be vulnerable to a
   make-your-blocks-so-expensive-to-verify-they-get-orphaned attack.

   41e1a0d766
7. 
   gavinandresen commented at 3:11 pm on February 5, 2013: contributor

   Updated to add a comment as suggested by Mike Hearn.
8. gavinandresen referenced this in commit 1d0851eca8 on Feb 5, 2013
9. gavinandresen merged this on Feb 5, 2013
10. gavinandresen closed this on Feb 5, 2013

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11. gavinandresen deleted the branch on Nov 4, 2013
12. laudney referenced this in commit 2a8c5f1823 on Mar 19, 2014
13. DrahtBot locked this on Sep 8, 2021

Contributors
gavinandresen gmaxwell BitcoinPullTester sipa

Milestone
0.8.0