diff options
| author | Gregory Maxwell <greg@xiph.org> | 2017-01-06 11:49:59 +0000 |
|---|---|---|
| committer | Gregory Maxwell <greg@xiph.org> | 2017-01-13 15:42:24 +0000 |
| commit | e440ac7ef3b6f3ad1cd8fc7027cece40413202d9 (patch) | |
| tree | db3b4ef8fbd6a849fb3dd3df7921d950c8e910b9 /doc/release-process.md | |
| parent | 02e5308c1b9f3771bbe49bc5036215fa2bd66aa9 (diff) | |
Introduce assumevalid setting to skip presumed valid scripts.
This disentangles the script validation skipping from checkpoints.
A new option is introduced "assumevalid" which specifies a block whos
ancestors we assume all have valid scriptsigs and so we do not check
them when they are also burried under the best header by two weeks
worth of work.
Unlike checkpoints this has no influence on consensus unless you set
it to a block with an invalid history. Because of this it can be
easily be updated without risk of influencing the network consensus.
This results in a massive IBD speedup.
This approach was independently recommended by Peter Todd and Luke-Jr
since POW based signature skipping (see PR#9180) does not have the
verifiable properties of a specific hash and may create bad incentives.
The downside is that, like checkpoints, the defaults bitrot and older
releases will sync slower. On the plus side users can provide their
own value here, and if they set it to something crazy all that will
happen is more time will be spend validating signatures.
Checkblocks and checklevel are also moved to the hidden debug options:
Especially now that checkblocks has a low default there is little need
to change these settings, and users frequently misunderstand them as
influencing security or IBD speed. By hiding them we offset the
space added by this new option.
Diffstat (limited to 'doc/release-process.md')
| -rw-r--r-- | doc/release-process.md | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/doc/release-process.md b/doc/release-process.md index 61f05b0771..399ed25c91 100644 --- a/doc/release-process.md +++ b/doc/release-process.md @@ -13,6 +13,11 @@ Before every minor and major release: * Update version in sources (see below) * Write release notes (see below) * Update `src/chainparams.cpp` nMinimumChainWork with information from the getblockchaininfo rpc. +* Update `src/chainparams.cpp` defaultAssumeValid with information from the getblockhash rpc. + - The selected value must not be orphaned so it may be useful to set the value two blocks back from the tip. + - Testnet should be set some tens of thousands back from the tip due to reorgs there. + - This update should be reviewed with a reindex-chainstate with assumevalid=0 to catch any defect + that causes rejection of blocks in the past history. Before every major release: |