如果你希望马上开始学习以太坊DApp开发，可以访问汇智网提供的出色的在线互动教程： 以太坊DApp实战入门教程 以太坊去中心化电商应用开发实战 返回块号或区块哈希值所对应的区块 调用： web3.eth.getBlock...示例： var info = web3.eth.getBlock(3150); console.log(info); /* { "number": 3, "hash": "0xef95f2f1ed3ca60b048b4bf67cde2195961e0bba6f70bcbea9a2c4e133e34b46
) #define ROTL64(x,y) rotl64(x,y) #define BIG_CONSTANT(x) (x##LLU) FORCE_INLINE uint32_t getblock...( const uint32_t * p, int i ) { return p[i]; } FORCE_INLINE uint64_t getblock ( const uint64_t *...(blocks,i*4+0); uint32_t k2 = getblock(blocks,i*4+1); uint32_t k3 = getblock(blocks,i*4+2); uint32_t...k4 = getblock(blocks,i*4+3); k1 *= c1; k1 = ROTL32(k1,15); k1 *= c2; h1 ^= k1; h1 = ROTL32(h1,19); h1...(blocks,i*2+0); uint64_t k2 = getblock(blocks,i*2+1); k1 *= c1; k1 = ROTL64(k1,31); k1 *= c2; h1 ^=
database模块管理，但是持久化相关接口在protocol/store.go中 type Store interface { BlockExist(*bc.Hash) bool GetBlock...error SaveChainStatus(*state.BlockNode, *state.UtxoViewpoint) error } BlockExist 根据hash判断区块是否存在 GetBlock...查询块过程分析 ** database/leveldb/store.go ** func (s *Store) GetBlock(hash *bc.Hash) (*types.Block, error)...(*types.Block), nil } GetBlock函数最终会执行lookup函数。...fillFn回调函数实际上调取的是database/leveldb/store.go下的GetBlock，它会从磁盘中获取block信息并返回。
自动变量，函数参数 静态变量，静态全局变量，全局变量 一.blcok捕获局部变量 __block int value = 20; int value1 = 10; int (^getBlock...+ 30 + 10 return num + value + value1; }; value = 30; value1 = 40; NSLog(@"getBlock...-%d",getBlock(100)); 输入结果是 140， 这里会发现几个问题: 如果不加__block 不可以修改value的值，为什么?
在比原链中数据持久化存储由database模块管理，但是持久化相关接口在protocol/store.go中 type Store interface { BlockExist(*bc.Hash) bool GetBlock...byte("BTS:") ) blockStoreKey 主链状态前缀 blockPrefix 块信息前缀 blockHeaderPrefix 块头信息前缀 txStatusPrefix 交易状态前缀 GetBlock...查询块过程分析 database/leveldb/store.go func (s *Store) GetBlock(hash *bc.Hash) (*types.Block, error) {...(*types.Block), nil } GetBlock函数最终会执行lookup函数。...fillFn回调函数实际上调取的是database/leveldb/store.go下的GetBlock，它会从磁盘中获取block信息并返回。
_NSConcreteGlobalBlock全局 __block int value = 20; int value1 = 10; int (^getBlock)(int num...+ 30 + 10 return num + value + value1; }; value = 30; value1 = 40; NSLog(@"getBlock...-%d",getBlock(100)); 输出结果为： 没有用到外部变量或者只用了全局变量、静态变量的block都是_NSConcreteGlobalBlock
endian-swapping or can only // handle aligned reads, do the conversion here FORCE_INLINE uint32_t getblock32...( const uint32_t * p, int i ) { return p[i]; } FORCE_INLINE uint64_t getblock64 ( const uint64...(blocks,i*4+0); uint32_t k2 = getblock32(blocks,i*4+1); uint32_t k3 = getblock32(blocks...,i*4+2); uint32_t k4 = getblock32(blocks,i*4+3); k1 *= c1; k1 = ROTL32(k1,15); k1...(blocks,i*2+0); uint64_t k2 = getblock64(blocks,i*2+1); k1 *= c1; k1 = ROTL64(k1,31
//MDataTable table = action.Select("IsDel=0 order by posttime desc"); IBlock block = getBlock...and SystemId=1 and id>1 order by orderflag asc "); IBlock cblock = getBlock
查看交易池中等待被打包的交易： txpool.status 查看已提交但还未被处理的交易，pending表示已提交但还未被处理的交易： txpool.inspect.pending 查看当前待确认交易： eth.getBlock...txpool.status 之后我们查看已提交但还未被处理的交易，目前没有已提交但还未被处理的交易 txpool.inspect.pending //查看已提交但是未被处理的交易，发现为空 eth.getBlock...0xe5a58428588fcad55c95eee36307b545a67b6bcb11c85cad967202f398b06748") 注意：处于pending状态的交易，收据是不可用的 10、查询区块 a、查询最新区块 eth.getBlock...('latest') b、根据区块Number或Hash查询区块 eth.getBlock(0) eth.getBlock("0xd33a8a18e09a0b89c588d813c5734c6c72c632119e4a5af1be0e64f685a340ff
* @throws */ Object getBlockHash(int index) throws CoinException; /** * @Title: getblock...@param @throws CoinException 参数 * @return Object 返回类型 * @throws */ Object getblock...CoinException(e.getMessage() + String.format("[params]: index=%s", index)); } } @Override public Object getblock...(String blockHash) throws CoinException { try { return client.getClient().invoke("getblock...); } catch (Throwable e) { LOG.info("=== com.bscoin.bit.service.btc.impl.BtcServiceImpl.getblock
nextBlockVersion.getVersion() == HoodieLogFormatVersion.DEFAULT_VERSION) { return HoodieAvroDataBlock.getBlock...(content, readerSchema); } else { return HoodieAvroDataBlock.getBlock(logFile, inputStream...readerSchema, header, footer); } case DELETE_BLOCK: return HoodieDeleteBlock.getBlock...contentLength, blockEndPos, header, footer); case COMMAND_BLOCK: return HoodieCommandBlock.getBlock
String prepareData(long nonce) { byte[] prevBlockHashBytes = {}; if (StringUtils.isNoneBlank(this.getBlock...().getPrevBlockHash())) { prevBlockHashBytes = new BigInteger(this.getBlock().getPrevBlockHash...16).toByteArray(); } return ByteUtils.merge( prevBlockHashBytes, this.getBlock...nonce = 0; String shaHex = ""; System.out.printf("Mining the block containing：%s \n", this.getBlock...* * 验证区块是否有效 * * @return */ public boolean validate() { String data = this.prepareData(this.getBlock
void(^block)(NSString * str); @interface ViewController () @end @implementation ViewController -(block)getBlock...defineClass("ViewController", { viewDidAppear: function(animated) { var func = self.getBlock
oldIter.next().getBlock().equals(newIter.next().getBlock())) { throw new IOException("Blocklist...} return -1; } final long len = readBlockLength(last); last.getBlock
RocksDBUtils，主要的功能如下： putLastBlockHash：保存最新一个区块的Hash值 getLastBlockHash：查询最新一个区块的Hash值 putBlock：保存区块 getBlock...} } /** * 查询区块 * * @param blockHash * @return */ public Block getBlock...return false; } Block lastBlock = RocksDBUtils.getInstance().getBlock...() == 0) { return true; } return RocksDBUtils.getInstance().getBlock...public Block next() throws Exception { Block currentBlock = RocksDBUtils.getInstance().getBlock
0a020f35220844fe35c41476ee6c4098cad0b8ae2f5a65080112610a2d747970652e676f6f676c65617069732e636f6d2f70726f746f636f6c2e5472616e73666572436f6e747261637412300a154184561e336a9f8b730cec5779887d7542c0fb497c121541a4ae3d98433eee21beff0bbc68e4c7e94321ed87186470c6ffccb8ae2f"}} def getblock...value"]["to_address"] in watch: pass def watch(watch = {}): pass # getblock
eth.getBalance()：查看账户余额，返回值的单位是 Wei； eth.blockNumber：列出当前区块高度； eth.getTransaction()：获取交易信息； eth.getBlock
if rem = pool.chain.GetBlock(rem.ParentHash(), rem.NumberU64()-1); rem == nil {...if add = pool.chain.GetBlock(add.ParentHash(), add.NumberU64()-1); add == nil {...if rem = pool.chain.GetBlock(rem.ParentHash(), rem.NumberU64()-1); rem == nil {...if add = pool.chain.GetBlock(add.ParentHash(), add.NumberU64()-1); add == nil {...if rem = pool.chain.GetBlock(rem.ParentHash(), rem.NumberU64()-1); rem == nil {
（不知道为什么在2.8的api中查询不到，所以我只能通过IDEA去看源码） 1）ExtendedBlock类（通过LocatedBlock的getBlock()方法获取） public String...public String getIpAddr() {} public String getHostName() {} 3)LocatedBlock public ExtendedBlock getBlock...for(LocatedBlock block:allBlocks){ ExtendedBlock eBlock= block.getBlock
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