本文整理匯總了Golang中github.com/expanse-project/go-expanse/pow.Block.Nonce方法的典型用法代碼示例。如果您正苦於以下問題：Golang Block.Nonce方法的具體用法？Golang Block.Nonce怎麽用？Golang Block.Nonce使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類github.com/expanse-project/go-expanse/pow.Block的用法示例。
在下文中一共展示了Block.Nonce方法的3個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Golang代碼示例。
示例1: Verify
// Verify checks whether the block's nonce is valid.
func (l *Light) Verify(block pow.Block) bool {
// TODO: do ethash_quick_verify before getCache in order
// to prevent DOS attacks.
blockNum := block.NumberU64()
if blockNum >= epochLength*2048 {
glog.V(logger.Debug).Infof("block number %d too high, limit is %d", epochLength*2048)
return false
}
difficulty := block.Difficulty()
/* Cannot happen if block header diff is validated prior to PoW, but can
happen if PoW is checked first due to parallel PoW checking.
We could check the minimum valid difficulty but for SoC we avoid (duplicating)
Ethereum protocol consensus rules here which are not in scope of Ethash
*/
if difficulty.Cmp(common.Big0) == 0 {
glog.V(logger.Debug).Infof("invalid block difficulty")
return false
}
cache := l.getCache(blockNum)
dagSize := C.ethash_get_datasize(C.uint64_t(blockNum))
if l.test {
dagSize = dagSizeForTesting
}
// Recompute the hash using the cache.
hash := hashToH256(block.HashNoNonce())
ret := C.ethash_light_compute_internal(cache.ptr, dagSize, hash, C.uint64_t(block.Nonce()))
if !ret.success {
return false
}
// avoid mixdigest malleability as it's not included in a block's "hashNononce"
if block.MixDigest() != h256ToHash(ret.mix_hash) {
return false
}
// Make sure cache is live until after the C call.
// This is important because a GC might happen and execute
// the finalizer before the call completes.
_ = cache
// The actual check.
target := new(big.Int).Div(minDifficulty, difficulty)
return h256ToHash(ret.result).Big().Cmp(target) <= 0
}示例2: Verify
// Verify checks whether the block's nonce is valid.
func (l *Light) Verify(block pow.Block) bool {
// TODO: do ethash_quick_verify before getCache in order
// to prevent DOS attacks.
blockNum := block.NumberU64()
if blockNum >= epochLength*2048 {
glog.V(logger.Debug).Infof("block number %d too high, limit is %d", epochLength*2048)
return false
}
difficulty := block.Difficulty()
/* Cannot happen if block header diff is validated prior to PoW, but can
happen if PoW is checked first due to parallel PoW checking.
We could check the minimum valid difficulty but for SoC we avoid (duplicating)
Expanse protocol consensus rules here which are not in scope of Ethash
*/
if difficulty.Cmp(common.Big0) == 0 {
glog.V(logger.Debug).Infof("invalid block difficulty")
return false
}
cache := l.getCache(blockNum)
dagSize := C.ethash_get_datasize(C.uint64_t(blockNum))
if l.test {
dagSize = dagSizeForTesting
}
// Recompute the hash using the cache.
ok, mixDigest, result := cache.compute(uint64(dagSize), block.HashNoNonce(), block.Nonce())
if !ok {
return false
}
// avoid mixdigest malleability as it's not included in a block's "hashNononce"
if block.MixDigest() != mixDigest {
return false
}
// The actual check.
target := new(big.Int).Div(maxUint256, difficulty)
return result.Big().Cmp(target) <= 0
}示例3: Verify
func Verify(block pow.Block) bool {
return verify(block.HashNoNonce(), block.Difficulty(), block.Nonce())
}