/**
* @param BlockIndex $index
*/
public function add(BlockIndex $index)
{
if ($index->getHeader()->getPrevBlock() !== $this->getHash($index->getHeight() - 1)->getHex()) {
throw new \RuntimeException('ChainCache: New BlockIndex does not refer to last');
}
$binary = hex2bin($index->getHash());
$this->hashByHeight[] = $binary;
$this->heightByHash[$binary] = $index->getHeight();
}
/**
* @param BlockIndex $index
*/
public function updateLastBlock(BlockIndex $index)
{
if ($this->lastBlock->getHash() !== $index->getHeader()->getPrevBlock()) {
throw new \RuntimeException('UpdateLastBlock: Block does not extend this chain');
}
if ($this->lastBlock->getHeight() != $index->getHeight() - 1) {
throw new \RuntimeException('UpdateLastBlock: Incorrect chain height' . ($index->getHeight() - 1));
}
$this->lastBlock = $index;
}
public function testBlockIndex()
{
$headerHex = '0100000000000000000000000000000000000000000000000000000000000000000000003ba3edfd7a7b12b27ac72c3e67768f617fc81bc3888a51323a9fb8aa4b1e5e4a29ab5f49ffff001d1dac2b7c';
$header = BlockHeaderFactory::fromHex($headerHex);
$hash = $header->getHash();
$height = 0;
$work = 0;
$index = new BlockIndex($hash, $height, $work, $header);
$this->assertEquals($hash, $index->getHash());
$this->assertEquals($height, $index->getHeight());
$this->assertEquals($work, $index->getWork());
$this->assertSame($header, $index->getHeader());
}
/**
* @param BlockIndex $prevIndex
* @param $timeFirstBlock
* @return int|string
*/
public function calculateNextWorkRequired(BlockIndex $prevIndex, $timeFirstBlock)
{
$header = $prevIndex->getHeader();
$math = $this->math;
$timespan = $math->sub($header->getTimestamp(), $timeFirstBlock);
$lowest = $math->div($this->params->powTargetTimespan(), 4);
$highest = $math->mul($this->params->powTargetTimespan(), 4);
if ($math->cmp($timespan, $lowest) < 0) {
$timespan = $lowest;
}
if ($math->cmp($timespan, $highest) > 0) {
$timespan = $highest;
}
$target = $math->compact()->set($header->getBits()->getInt());
$limit = $this->math->compact()->set($this->params->powBitsLimit());
$new = bcdiv(bcmul($target, $timespan), $this->params->powTargetTimespan());
if ($math->cmp($new, $limit) > 0) {
$new = $limit;
}
return $math->compact()->read($new, false);
}
/**
* @param BlockIndex $index
* @return bool
*/
public function insertIndexGenesis(BlockIndex $index)
{
if ($this->debug) {
echo "db: called insertIndexGenesis\n";
}
$stmt = $this->dbh->prepare("\n INSERT INTO headerIndex (\n hash, height, work, version, prevBlock, merkleRoot, nBits, nTimestamp, nNonce, lft, rgt\n ) VALUES (\n :hash, :height, :work, :version, :prevBlock, :merkleRoot, :nBits, :nTimestamp, :nNonce, :lft, :rgt\n )\n ");
$header = $index->getHeader();
var_dump($index);
if ($stmt->execute(array('hash' => $index->getHash(), 'height' => $index->getHeight(), 'work' => $index->getWork(), 'version' => $header->getVersion(), 'prevBlock' => $header->getPrevBlock(), 'merkleRoot' => $header->getMerkleRoot(), 'nBits' => $header->getBits()->getInt(), 'nTimestamp' => $header->getTimestamp(), 'nNonce' => $header->getNonce(), 'lft' => 1, 'rgt' => 2))) {
return true;
}
throw new \RuntimeException('Failed to update insert Genesis block!');
}
/**
* @param BlockIndex $index
*/
public function updateTip(BlockIndex $index)
{
if ($this->index->getHash() !== $index->getHeader()->getPrevBlock()) {
throw new \RuntimeException('Header: Header does not extend this chain');
}
if ($index->getHeight() - 1 != $this->index->getHeight()) {
throw new \RuntimeException('Header: Incorrect chain height');
}
$this->chainCache->add($index);
$this->index = $index;
}
