github.com/deroproject/derosuite@v2.1.6-1.0.20200307070847-0f2e589c7a2b+incompatible/blockchain/rpcserver/getblock.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 rpcserver
    18  
    19  // get block template handler not implemented
    20  
    21  //import "fmt"
    22  import "context"
    23  import "encoding/hex"
    24  import "encoding/json"
    25  
    26  //import	"log"
    27  //import 	"net/http"
    28  
    29  import "github.com/intel-go/fastjson"
    30  import "github.com/osamingo/jsonrpc"
    31  
    32  import "github.com/deroproject/derosuite/crypto"
    33  import "github.com/deroproject/derosuite/structures"
    34  
    35  //import "github.com/deroproject/derosuite/blockchain"
    36  
    37  type GetBlock_Handler struct{}
    38  
    39  // TODO
    40  func (h GetBlock_Handler) ServeJSONRPC(c context.Context, params *fastjson.RawMessage) (interface{}, *jsonrpc.Error) {
    41  	var p structures.GetBlock_Params
    42  	var hash crypto.Hash
    43  	var err error
    44  
    45  	if errp := jsonrpc.Unmarshal(params, &p); err != nil {
    46  		return nil, errp
    47  	}
    48  
    49  	if crypto.HashHexToHash(p.Hash) == hash { // user requested using height
    50  		if int64(p.Height) > chain.Load_TOPO_HEIGHT(nil) {
    51  			return nil, jsonrpc.ErrInvalidParams()
    52  		}
    53  
    54  		//return nil, jsonrpc.ErrInvalidParams()
    55  
    56  		hash, err = chain.Load_Block_Topological_order_at_index(nil, int64(p.Height))
    57  		if err != nil { // if err return err
    58  			logger.Warnf("User requested %d height block, chain height %d but err occured %s", p.Height, chain.Get_Height(), err)
    59  
    60  			return nil, jsonrpc.ErrInvalidParams()
    61  		}
    62  
    63  	} else {
    64  		hash = crypto.HashHexToHash(p.Hash)
    65  	}
    66  
    67  	block_header, err := chain.GetBlockHeader(hash)
    68  	if err != nil { // if err return err
    69  		return nil, jsonrpc.ErrInvalidParams()
    70  	}
    71  	bl, err := chain.Load_BL_FROM_ID(nil, hash)
    72  	if err != nil { // if err return err
    73  		return nil, jsonrpc.ErrInvalidParams()
    74  	}
    75  
    76  	json_encoded_bytes, err := json.Marshal(bl)
    77  	if err != nil { // if err return err
    78  		return nil, jsonrpc.ErrInvalidParams()
    79  	}
    80  	return structures.GetBlock_Result{ // return success
    81  		Block_Header: block_header,
    82  		Blob:         hex.EncodeToString(bl.Serialize()),
    83  		Json:         string(json_encoded_bytes),
    84  		Status:       "OK",
    85  	}, nil
    86  }