Query the Network

getBlockByNum

Returns the Block Object corresponding to the 'Block Height' specified (number of blocks preceding it).

Usage

getBlockByNum(blockNum)

Parameter

Parameter	Description	Type
blockNum	Block height	long

Return

Object - Block object。

Example

wrapper.getBlockByNum(10);

Execution result:

block_header {
    raw_data {
      timestamp: 1572510150000
      txTrieRoot: "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
      parentHash: "\000\000\000\000\000\000\000\t\210\236\253\326\027\343\241\240\324\030\255\243\330\203\241\002\217\372 \354\261\'{H"
      number: 10
      witness_address: "A\324\244\374\'C\357\b\310\216\265\256\316|\304\255\0327D\222\220"
      version: 9
    }
    witness_signature: "\354_\342^31\231\022\201\366\333S\335\324\334\317\034O\036\3439\347\344\377\252\371\251\020\264\277lj\032\005\241\261\255Tt\261\363\252v\250\0008\227W\356\371\rT\335\263;>=\314\366V\021\372?\003\001"
  }

getBlockByLatestNum

Get some latest blocks.

Usage

getBlockByLatestNum(num)

Parameter

Parameter	Description	Type
num	Number of latest blocks. It must be between 1 and 99.	long

Return

Object - BlockListExtention object。

Example

wrapper.getBlockByLatestNum(2);

Execution result:

block {
    transactions {
      transaction {
        raw_data {
          ref_block_bytes: "w\v"
          ref_block_hash: "\307\3062\245\312;G\257"
          expiration: 1614763632000
          contract {
            type: TriggerSmartContract
            parameter {
              type_url: "type.googleapis.com/protocol.TriggerSmartContract"
              value: "\n\025A\006\001\273\365u\212\277P3\372\277`\022[L\262\216{\225J\022\025AN\034~z\227\027A\330T=\231\006\255\321\361\232\330\031KT\"D\251\005\234\273\000\000\000\000\000\000\000\000\000\000\000ASd\326\f\244\362\362<\346\025S\375\272/aZ\250\226\2026\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\017B@"
            }
          }
          timestamp: 1614763575881
          fee_limit: 5000000
        }
        signature: "?\360\325:\305@\017\340\244\265\026$\276\004\247\316\355\265\035\037m\343J\361H\367\224\211\333\341\317\037\002\350\215V\310\235c\023W\371?\322\v&\245k\356\a\230\323\032\234\370\034v\203\333\302/\252\340I\000"
        ret {
          contractRet: SUCCESS
        }
      }
      txid: "0\036\246\245\356!3\305A\a\270*;by$qPR\317\2517n\366Uc\377\017\034-\261\a"
      result {
        result: true
      }
    }
    ...
block_header {
    raw_data {
      timestamp: 1614763578000
      txTrieRoot: "\212\332@\257\327\224fU\304k%\206\325O(\230Z@L\325!\353n>4\326+\377I\302\357\033"
      parentHash: "\000\000\000\000\000\324w\f\023y\365\200\350\2676\277\276e\266#\230\300\311Eh2u\330\021\346\276\205"
      number: 13924109
      witness_address: "Aw\024\200\351\353\2102\232\t9g\262\350\234\t\325K\273\023>"
      version: 20
    }
    witness_signature: "\2260\\\003\307\315\2213>\265\320\004@\303\002<\244\234\2326\261%2\004\027\324\033\240d\v\031\371\021\213\323g\353jGc;\024\226nL\"6U\033\336\002\021\336\274\b\232\037o42\370\304D\335\000"
  }
  blockid: "\000\000\000\000\000\324w\rI<\363\300\345\251\024F\001i\016\231\267*I\200\316e\005\a\f\250\253\025"
}
...

getBlockByLimitNext

Returns the list of Block objects included in the 'Block Height' range specified.

Usage

getBlockByLimitNext(startNum, endNum)

Parameter

Parameter	Description	Type
startNum	Number of start block height, including this block	long
endNum	Number of end block height, excluding this block	long

Return

Object - BlockListExtention object。Note: If the parameters are not correct or the difference between startNum and endNum is greater than 100, it will throw IllegalException exception.

Example

wrapper.getBlockByLimitNext(0,2);

Execution result:

block {
    transactions {
      transaction {
        raw_data {
          contract {
            type: TransferContract
            parameter {
              type_url: "type.googleapis.com/protocol.TransferContract"
              value: "\n\0270x000000000000000000000\022\025A~\225\344_Z`\314E\362\320\257\343~\351\367\177\270\316\237\377\030\200\200\216\306\233\377\355\257\001"
            }
          }
        }
      }
      txid: "\037\332\245\273v\343\301\245C\017}\211 \376,\353\310\022\n\024\310{:\234\2726\340\241\033h\265~"
      result {
        result: true
      }
    }
    ...
block_header {
    raw_data {
      txTrieRoot: "eV\251h($\215k\211\317\320H}L\357\202\2614\265TM\304(\310\242\030\276\262\333\205\253$"
      parentHash: "\345\2173\371\272\3710]\306\370+\237\0314\352\217\n\336-\357\271Q%\215P\026p(\307\2005\037"
      witness_address: "A new system must allow existing systems to be linked together without requiring any central control or coordination"
    }
  }
  blockid: "\000\000\000\000\000\000\000\000\326\230\324\031,V\313k\347$\245XD\216&\204\200-\344\326\315\206\220\334"
}

getNowBlock

Query the latest block information.

Usage

getNowBlock()

Parameter

None

Return

Object - Block object。

Example

wrapper.getNowBlock();

Execution result:

transactions {
    raw_data {
      ref_block_bytes: "vy"
      ref_block_hash: "f\005\240\236L\371\307\221"
      expiration: 1614763188000
      contract {
        type: TriggerSmartContract
        parameter {
          type_url: "type.googleapis.com/protocol.TriggerSmartContract"
          value: "\n\025A\006\001\273\365u\212\277P3\372\277`\022[L\262\216{\225J\022\025AN\034~z\227\027A\330T=\231\006\255\321\361\232\330\031KT\"D\251\005\234\273\000\000\000\000\000\000\000\000\000\000\000ASd\326\f\244\362\362<\346\025S\375\272/aZ\250\226\2026\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\017B@"
        }
      }
      timestamp: 1614763131403
      fee_limit: 5000000
    }
    signature: "H\0312\345e\227\033g\316\304\313\016R\275Sh\"N4\213\002S%\363q\252\373\rh\006\363\t|\263\225Q\001d?`R\2765 +#>\343\024\363\3107\371e\374\271\216rS\321\016H\325\364\001"
    ret {
      contractRet: SUCCESS
    }
  }
  ...
  block_header {
    raw_data {
      timestamp: 1614763134000
      txTrieRoot: "\000\275AwP\a\001f\344#\"\245\307\037\277\342\367\257\360\333\201\032]N\024Y+\341ac\2240"
      parentHash: "\000\000\000\000\000\324vz\003\0200\022\340\272\361A\337\245\212\341\035Q^2^\004M\325\201\347e}"
      number: 13923963
      witness_address: "A\fLd \037f\243\'\031\317\232\264\346\364\256\3263\vH\275"
      version: 20
    }
    witness_signature: "\315\002\203>\v\254\310\363\'M\332\315`bJ\\\263\023\317\034B\251\032\363\303i\276\246\2269\325Ee\211v\375k9\003X\tZ\3756\266\237\r4\025\257\362\3270\276\032\212-\026\266}\347d\260\037\000"
  }

getTransactionById

Query transaction information by transaction id.

Usage

getTransactionById(txID)

Parameter

Parameter	Description	Type
txID	Transaction hash, i.e. transaction id.	String

Return

Object - Transaction object. If the parameter is not correct, it will throw IllegalException exception.

Example

wrapper.getTransactionById("786c7516df88941e33ea44f03e637bd8c1ddcfd058634574102c6e3cfb93de0d");

Execution result:

raw_data {
    ref_block_bytes: "T("
    ref_block_hash: "\236\255\354O\002\260\333\266"
    expiration: 1606991088000
    contract {
      type: TriggerSmartContract
      parameter {
        type_url: "type.googleapis.com/protocol.TriggerSmartContract"
        value: "\n\025A,\303\3379\362\325AU\361\\\016\213q)Xr5\346\322X\022\025A \343\347\200\310\016\373\362#\310\371\266\334\310\f\016\336\v\033\345\"\244\002\365W#Z\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000 \000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\316{\'\346\270\270\346\210\217\347\274\226\345\217\267\':\'GN001208300ZK\',\'\346\270\270\346\210\217\345\271\263\345\217\260\':\'AG\346\227\227\350\210\260\345\216\205\',\'\346\270\270\346\210\217\347\261\273\345\236\213\':\'\347\231\276\345\256\266\344\271\220\',\'\346\270\270\346\210\217\347\273\223\346\236\234\':\'\345\272\2048\351\227\2623\',\'\345\210\233\345\273\272\346\227\266\351\227\264\':\'Mon Aug 31 01:55:24 PST 2020\',\'\346\210\252\346\255\242\346\227\245\346\234\237\':\'Mon Aug 31 01:55:49 PST 2020\'}\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
      }
    }
    timestamp: 1606991030518
    fee_limit: 1000000
  }
  signature: "\271\325\213%\214\256\316\3778\304\206m\346\363!h\355i\374\304\212\337\332\227\032\271\363\261\300\262\362*S\306\272{\027\264\003\302\271\335)\210\017\360\243\"\216\325\335\333\360Wu\2265\205y\356\336\344F\000\001"
  ret {
    contractRet: SUCCESS
  }

getTransactionInfoById

Query the transaction fee, block height by transaction id.

Usage

getTransactionInfoById(txID)

Parameter

Parameter	Description	Type
txID	Transaction hash, i.e. transaction id.	String

Return

Object - Transaction object. If the parameter is not correct, it will throw IllegalException exception.
###Example

wrapper.getTransactionInfoById("786c7516df88941e33ea44f03e637bd8c1ddcfd058634574102c6e3cfb93de0d");

Execution result:

id: "xlu\026\337\210\224\0363\352D\360>c{\330\301\335\317\320XcEt\020,n<\373\223\336\r"
  fee: 202080
  blockNumber: 11359274
  blockTimeStamp: 1606991034000
  contractResult: ""
  contract_address: "A \343\347\200\310\016\373\362#\310\371\266\334\310\f\016\336\v\033\345"
  receipt {
    energy_fee: 179280
    energy_usage_total: 4482
    net_fee: 22800
    result: SUCCESS
  }
  log {
    address: " \343\347\200\310\016\373\362#\310\371\266\334\310\f\016\336\v\033\345"
    topics: "\262tu\a\244n\032\274\354\241\234N\271W)&\301\206\342\fd\2204\250\r\321\254.\302\034\262q"
    data: "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000 \000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\316{\'\346\270\270\346\210\217\347\274\226\345\217\267\':\'GN001208300ZK\',\'\346\270\270\346\210\217\345\271\263\345\217\260\':\'AG\346\227\227\350\210\260\345\216\205\',\'\346\270\270\346\210\217\347\261\273\345\236\213\':\'\347\231\276\345\256\266\344\271\220\',\'\346\270\270\346\210\217\347\273\223\346\236\234\':\'\345\272\2048\351\227\2623\',\'\345\210\233\345\273\272\346\227\266\351\227\264\':\'Mon Aug 31 01:55:24 PST 2020\',\'\346\210\252\346\255\242\346\227\245\346\234\237\':\'Mon Aug 31 01:55:49 PST 2020\'}\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
  }

getTransactionInfoByBlockNum

Get transactionInfo from block number.

Usage

getTransactionInfoByBlockNum(blockNum)

Parameter

Parameter	Description	Type
blockNum	Block height	long

Return

Object - TransactionInfoList object. An IllegalException is thrown when the Parameter is incorrect or the transaction cannot be found.

Example

wrapper.getTransactionInfoByBlockNum(11359274);

Execution result:

transactionInfo {
    id: "xlu\026\337\210\224\0363\352D\360>c{\330\301\335\317\320XcEt\020,n<\373\223\336\r"
    fee: 202080
    blockNumber: 11359274
    blockTimeStamp: 1606991034000
    contractResult: ""
    contract_address: "A \343\347\200\310\016\373\362#\310\371\266\334\310\f\016\336\v\033\345"
    receipt {
      energy_fee: 179280
      energy_usage_total: 4482
      net_fee: 22800
      result: SUCCESS
    }
    log {
      address: " \343\347\200\310\016\373\362#\310\371\266\334\310\f\016\336\v\033\345"
      topics: "\262tu\a\244n\032\274\354\241\234N\271W)&\301\206\342\fd\2204\250\r\321\254.\302\034\262q"
      data: "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000 \000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\316{\'\346\270\270\346\210\217\347\274\226\345\217\267\':\'GN001208300ZK\',\'\346\270\270\346\210\217\345\271\263\345\217\260\':\'AG\346\227\227\350\210\260\345\216\205\',\'\346\270\270\346\210\217\347\261\273\345\236\213\':\'\347\231\276\345\256\266\344\271\220\',\'\346\270\270\346\210\217\347\273\223\346\236\234\':\'\345\272\2048\351\227\2623\',\'\345\210\233\345\273\272\346\227\266\351\227\264\':\'Mon Aug 31 01:55:24 PST 2020\',\'\346\210\252\346\255\242\346\227\245\346\234\237\':\'Mon Aug 31 01:55:49 PST 2020\'}\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000"
    }
  }
 ...

listNodes

List all nodes that current API node is connected to.

Usage

listNodes()

Parameter

None.

Return

Object - NodeList object. An IllegalException is thrown when it fails to get node list.

Example

wrapper.listNodes();

Execution result:

nodes {
    address {
      host: "47.252.73.173"
      port: 18888
    }
  }
  ...

getNodeInfo

Get current API node’ info.

Usage

getNodeInfo()

Parameter

None.

Return

Object - NodeInfo object. An IllegalException is thrown when it fails to get nodeInfo.

Example

wrapper.getNodeInfo();

Execution result:

beginSyncNum: 13924273
  block: "Num:13924292,ID:0000000000d477c4eb847d840e2be648712eaaccdc965f90c70d14a4f68b1bcf"
  solidityBlock: "Num:13924274,ID:0000000000d477b281ec179f56a8f5bdeeb1a8ab7e2531fe139ca2b82e4a9a1e"
  currentConnectCount: 30
  activeConnectCount: 3
  passiveConnectCount: 27
  totalFlow: 5258156
  peerInfoList {
    ...
  }
  ...
 configNodeInfo {
  ...
 }
 machineInfo {
  ...
  }
  ...
}

getChainParameters

All parameters that the blockchain committee can set.

Usage

getChainParameters()

Parameter

None.

Return

Object - ChainParameters object. An IllegalException is thrown when it fails to get chain parameters.

Example

wrapper.getChainParameters();

Execution result:

chainParameter {
    key: "getMaintenanceTimeInterval"
    value: 600000
  }
  ...