/**
* Given an ancestor height, and a list of hashes in the fork, use this
* information to compare the work, and if necessary, commit a reorg.
*
* @param int $ancestorHeight
* @param array $forkBlockHashes
* @return bool
* @throws \Exception
*/
public function processFork($ancestorHeight, array $forkBlockHashes)
{
$blocks = $this->blocks();
$index = $this->index();
/** @var \BitWasp\Bitcoin\Block\BlockHeaderInterface[] $chainHeaders */
$chainHeaders = [];
$chainHeight = $index->height()->height();
for ($i = $ancestorHeight; $i < $chainHeight; $i++) {
$chainHeaders[] = $blocks->fetch($index->hash()->fetch($i))->getHeader();
}
/** @var \BitWasp\Bitcoin\Block\BlockHeaderInterface[] $forkBlocks */
$forkBlocks = [];
$forkHeaders = [];
foreach ($forkBlockHashes as $hash) {
$block = $blocks->fetch($hash);
$forkBlocks[] = $block;
$forkHeaders[] = $block->getHeader();
}
// Only recalculate BlockIndex values if fork has greater work than chain blocks since ancestor
if ($this->difficulty->compareWork($forkHeaders, $chainHeaders) > 0) {
$index->reorg($ancestorHeight, $forkHeaders);
return true;
}
return false;
}
