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This commit is contained in:
Christopher Jeffrey 2016-01-21 18:28:04 -08:00
parent cdfe7b6ec5
commit 9b266c6ec7
1 changed files with 16 additions and 2 deletions
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18
lib/bcoin/chain.js
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@ -543,7 +543,7 @@ Chain.prototype.locatorHashes = function locatorHashes(start) {
top = start;
}
assert(this.db.get(top));
assert(this.db.has(top));
i = top;
for (;;) {
@ -553,7 +553,7 @@ Chain.prototype.locatorHashes = function locatorHashes(start) {
i = i - step;
if (i <= 0) {
if (i + step !== 0)
hashes.push(this.db.get(0).hash);
hashes.push(network.genesis.hash);
break;
}
if (hashes.length >= 10)
@ -999,6 +999,20 @@ ChainDB.prototype.isNull = function isNull(height) {
return utils.read32(data, 0) === 0;
};
ChainDB.prototype.has = function has(height) {
var data;
if (this._queue[height] || this._cache[height])
return true;
data = this._readSync(4, height * BLOCK_SIZE);
if (!data)
return false;
return utils.read32(data, 0) !== 0;
};
ChainDB.prototype._readSync = function _readSync(size, offset) {
var index = 0;
var data, bytes;