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| author | Pieter Wuille <pieter.wuille@gmail.com> | 2017-01-16 13:33:10 -0800 |
|---|---|---|
| committer | Pieter Wuille <pieter.wuille@gmail.com> | 2017-01-16 14:07:30 -0800 |
| commit | 812714fd80e96e28cd288c553c83838cecbfc2d9 (patch) | |
| tree | 05ff0a68dd7160451efb032d7dd792e12e6300e5 /doc | |
| parent | b0819c7e9b428631b806d97ff19beb2e218df31f (diff) | |
| parent | 7b5e3fe0ccb434821927c9cc2e9f2fb0d7f01dc4 (diff) | |
Merge #9484: Introduce assumevalid setting to skip validation presumed valid scripts.
7b5e3fe Add assumevalid testcase (John Newbery)
e440ac7 Introduce assumevalid setting to skip presumed valid scripts. (Gregory Maxwell)
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/release-notes.md | 23 | ||||
| -rw-r--r-- | doc/release-process.md | 5 |
2 files changed, 27 insertions, 1 deletions
diff --git a/doc/release-notes.md b/doc/release-notes.md index 96d1cb9ed5..bbda55854f 100644 --- a/doc/release-notes.md +++ b/doc/release-notes.md @@ -52,7 +52,7 @@ Fee Estimation Changes (previously 25) and for RPC calls (previously 2). Removal of Priority Estimation ------------------------------- +------------------------------- - Estimation of "priority" needed for a transaction to be included within a target number of blocks has been removed. The rpc calls are deprecated and will either @@ -76,6 +76,27 @@ P2P connection management - New connections to manually added peers are much faster. +Introduction of assumed-valid blocks +------------------------------------- + +- A significant portion of the initial block download time is spent verifying + scripts/signatures. Although the verification must pass to ensure the security + of the system, no other result from this verification is needed: If the node + knew the history of a given block were valid it could skip checking scripts + for its ancestors. + +- A new configuration option 'assumevalid' is provided to express this knowledge + to the software. Unlike the 'checkpoints' in the past this setting does not + force the use of a particular chain: chains that are consistent with it are + processed quicker, but other chains are still accepted if they'd otherwise + be chosen as best. Also unlike 'checkpoints' the user can configure which + block history is assumed true, this means that even outdated software can + sync more quickly if the setting is updated by the user. + +- Because the validity of a chain history is a simple objective fact it is much + easier to review this setting. As a result the software ships with a default + value adjusted to match the current chain shortly before release. The use + of this default value can be disabled by setting -assumevalid=0 0.14.0 Change log ================= 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: |