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Merge #15659: [docs] fix findFork comment

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c968780785 [docs] fix comment: the return value of findFork is _not_ an ancestor when the specified block is on the active chain (r8921039)

Pull request description:

  The return value of findFork is an ancestor of the specified block only when specified block is _not_ on the active chain. When it is on the active chain, the return value is the specified block itself, not an ancestor of it.

ACKs for commit c96878:
  promag:
    utACK c968780, however comment could be shorter.
  ryanofsky:
    utACK c968780785c18bd6d0a8659c9e251ccf8fdc91dc. Only change since last review is squash

Tree-SHA512: bb05d734059898784c4a59b5b0344719eb4dfb2d49a0f7f705fcb2eb630702e66be81c01299185faf0c219fa9f9aa64cbdf6d5f91e0b3dce0ff420909a454a18
This commit is contained in:
MarcoFalke 2019-04-10 09:33:09 -04:00 committed by pasta
parent 7d72c07722
commit c1c1b83fd9
1 changed files with 6 additions and 5 deletions
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11
src/interfaces/chain.h
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@ -119,8 +119,9 @@ public:
//! nullopt if no block in the range is pruned. Range is inclusive.
virtual Optional<int> findPruned(int start_height = 0, Optional<int> stop_height = nullopt) = 0;
//! Return height of the highest block on the chain that is an ancestor
//! of the specified block, or nullopt if no common ancestor is found.
//! Return height of the specified block if it is on the chain, otherwise
//! return the height of the highest block on chain that's an ancestor
//! of the specified block, or nullopt if there is no common ancestor.
//! Also return the height of the specified block as an optional output
//! parameter (to avoid the cost of a second hash lookup in case this
//! information is desired).
@ -134,9 +135,9 @@ public:
//! Get locator for the current chain tip.
virtual CBlockLocator getTipLocator() = 0;
//! Return height of the latest block common to locator and chain, which
//! is guaranteed to be an ancestor of the block used to create the
//! locator.
//! Return height of the highest block on chain in common with the locator,
//! which will either be the original block used to create the locator,
//! or one of its ancestors.
virtual Optional<int> findLocatorFork(const CBlockLocator& locator) = 0;
//! Check if transaction will be final given chain height current time.