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authorTom Harding <tomh@thinlink.com>2017-05-04 18:47:32 -0400
committerJeff Garzik <jeff@bloq.com>2017-05-04 18:47:32 -0400
commitac9c8b73ed7ee7d5b2055bf926b1da5e76025c49 (patch)
tree2cff7db2d4f2aa4d47ba909bc24454299a8f0037 /bip-0100.mediawiki
parent5ad92f06de1036b650bf0bd40c7f89eb5059cb2d (diff)
downloadbips-ac9c8b73ed7ee7d5b2055bf926b1da5e76025c49.tar.xz
bip100: Improve header metadata. Vote search edge cases.
jgarzik/bip100.git commits: b82d840733b09104fca3f8805ffa6f2459193201 4ed2a0e4523b06d97e32259e6e180734a794e24f
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-rw-r--r--bip-0100.mediawiki17
1 files changed, 11 insertions, 6 deletions
diff --git a/bip-0100.mediawiki b/bip-0100.mediawiki
index 67c2b4c..fdb62a4 100644
--- a/bip-0100.mediawiki
+++ b/bip-0100.mediawiki
@@ -1,5 +1,6 @@
<pre>
BIP: 100
+ Layer: Consensus (hard fork)
Title: Dynamic maximum block size by miner vote
Author: Jeff Garzik <jgarzik@gmail.com>
Tom Harding <tomh@thinlink.com>
@@ -8,8 +9,6 @@
Type: Standards Track
Created: 2015-06-11
License: BSD-2-Clause
- Comments-Summary: No comments yet.
- Comments-URI: https://github.com/bitcoin/bips/wiki/Comments:BIP-0100
</pre>
==Abstract==
@@ -30,14 +29,14 @@ The system is compatible with emergent consensus, but whereas under that system
# Initial value of <code>hardLimit</code> is 1000000 bytes, preserving current system.
# Changing <code>hardLimit</code> is accomplished by encoding a proposed value, a vote, within a block's coinbase scriptSig, and by processing the votes contained in the previous retargeting period.<br /><br />
## Vote encoding
-### A vote is represented as a positive megabyte value using the BIP100 pattern<br /><br /><code>/BIP100/B[0-9]+/</code><br /><br />Example: <code>/BIP100/B8/</code> is a vote for a 8000000-byte <code>hardLimit</code>.<br /><br />
+### A vote is represented as a megabyte value using the BIP100 pattern<br /><br /><code>/BIP100/B[0-9]+/</code><br /><br />Example: <code>/BIP100/B8/</code> is a vote for a 8000000-byte <code>hardLimit</code>.<br /><br />
### If the block height is encoded at the start of the coinbase scriptSig, as per BIP34, it is ignored.
### Only the first BIP100 pattern match is processed in "Maximum block size recalculation" below.
-### A valid megabyte value is represented by consecutive base-ten digits.
+### A megabyte value is represented by consecutive base-ten digits.
### If no BIP100 pattern is matched, the first matching emergent consensus pattern <code>/EB[0-9]+/</code>, if any, is accepted as the megabyte vote.<br /><br />
## Maximum block size recalculation
### A <code>new hardLimit</code> is calculated after each difficulty adjustment period of 2016 blocks, and applies to the next 2016 blocks.
-### Absent/invalid votes are counted as votes for the <code>current hardLimit</code>.
+### Absent/zero-valued votes are counted as votes for the <code>current hardLimit</code>.
### The votes of the previous 2016 blocks are sorted by megabyte vote.
### Raising <code>hardLimit</code><br /><br />
#### The <code>raise value</code> is defined as the vote of the 1512th highest block, converted to bytes.
@@ -50,7 +49,7 @@ The system is compatible with emergent consensus, but whereas under that system
### Otherwise, <code>new hardLimit</code> remains the same as <code>current hardLimit</code>.
===Signature Hashing Operations Limits===
-# The per-block signature hashing operations limit is scaled to (<code>hardLimit</code> rounded up to nearest megabyte)/50.
+# The per-block signature hashing operations limit is scaled to (actual block size rounded up to nearest megabyte)/50.
# A maximum serialized transaction size of 1000000 bytes is imposed.
===Publication of <code>hardLimit</code>===
@@ -64,3 +63,9 @@ This BIP is presumed deployed and activated as of block height 449568 by impleme
The first block larger than 1M will create a network partition, as nodes with a fixed 1M hard limit reject that block.
+==Reference Implementation==
+https://github.com/bitcoinxt/bitcoinxt/pull/188
+
+==Copyright==
+This document is licensed under the BSD 2-clause license.
+