github.com/deroproject/derosuite@v2.1.6-1.0.20200307070847-0f2e589c7a2b+incompatible/blockchain/blockheader.go (about)

     1  // Copyright 2017-2018 DERO Project. All rights reserved.
     2  // Use of this source code in any form is governed by RESEARCH license.
     3  // license can be found in the LICENSE file.
     4  // GPG: 0F39 E425 8C65 3947 702A  8234 08B2 0360 A03A 9DE8
     5  //
     6  //
     7  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
     8  // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     9  // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
    10  // THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
    11  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
    12  // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    13  // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
    14  // STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
    15  // THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    16  
    17  package blockchain
    18  
    19  //import "fmt"
    20  import "github.com/deroproject/derosuite/crypto"
    21  import "github.com/deroproject/derosuite/structures"
    22  
    23  /* fill up the above structure from the blockchain */
    24  func (chain *Blockchain) GetBlockHeader(hash crypto.Hash) (result structures.BlockHeader_Print, err error) {
    25  
    26  	dbtx, err := chain.store.BeginTX(false)
    27  	if err != nil {
    28  		logger.Warnf("Could NOT add block to chain. Error opening writable TX, err %s", err)
    29  		return
    30  	}
    31  
    32  	defer dbtx.Rollback()
    33  
    34  	bl, err := chain.Load_BL_FROM_ID(dbtx, hash)
    35  	if err != nil {
    36  		return
    37  	}
    38  
    39  	result.TopoHeight = -1
    40  	if chain.Is_Block_Topological_order(dbtx, hash) {
    41  		result.TopoHeight = chain.Load_Block_Topological_order(dbtx, hash)
    42  	}
    43  	result.Height = chain.Load_Height_for_BL_ID(dbtx, hash)
    44  	result.Depth = chain.Get_Height() - result.Height
    45  	result.Difficulty = chain.Load_Block_Difficulty(dbtx, hash).String()
    46  	result.Hash = hash.String()
    47  	result.Major_Version = uint64(bl.Major_Version)
    48  	result.Minor_Version = uint64(bl.Minor_Version)
    49  	result.Nonce = uint64(bl.Nonce)
    50  	result.Orphan_Status = chain.Is_Block_Orphan(hash)
    51  	result.SyncBlock = chain.IsBlockSyncBlockHeight(dbtx, hash)
    52  	result.Reward = chain.Load_Block_Total_Reward(dbtx, hash)
    53  	result.TXCount = int64(len(bl.Tx_hashes))
    54  
    55  	for i := range bl.Tips {
    56  		result.Tips = append(result.Tips, bl.Tips[i].String())
    57  	}
    58  	//result.Prev_Hash = bl.Prev_Hash.String()
    59  	result.Timestamp = bl.Timestamp
    60  
    61  	return
    62  }