github.com/jeffallen/go-ethereum@v1.1.4-0.20150910155051-571d3236c49c/rpc/api/web3_args.go (about)

     1  // Copyright 2015 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package api
    18  
    19  import (
    20  	"encoding/json"
    21  
    22  	"github.com/ethereum/go-ethereum/rpc/shared"
    23  )
    24  
    25  type Sha3Args struct {
    26  	Data string
    27  }
    28  
    29  func (args *Sha3Args) UnmarshalJSON(b []byte) (err error) {
    30  	var obj []interface{}
    31  	if err := json.Unmarshal(b, &obj); err != nil {
    32  		return shared.NewDecodeParamError(err.Error())
    33  	}
    34  
    35  	if len(obj) < 1 {
    36  		return shared.NewInsufficientParamsError(len(obj), 1)
    37  	}
    38  
    39  	argstr, ok := obj[0].(string)
    40  	if !ok {
    41  		return shared.NewInvalidTypeError("data", "is not a string")
    42  	}
    43  	args.Data = argstr
    44  	return nil
    45  }