github.com/digdeepmining/go-atheios@v1.5.13-0.20180902133602-d5687a2e6f43/accounts/abi/argument.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 abi
    18  
    19  import (
    20  	"encoding/json"
    21  	"fmt"
    22  )
    23  
    24  // Argument holds the name of the argument and the corresponding type.
    25  // Types are used when packing and testing arguments.
    26  type Argument struct {
    27  	Name    string
    28  	Type    Type
    29  	Indexed bool // indexed is only used by events
    30  }
    31  
    32  func (a *Argument) UnmarshalJSON(data []byte) error {
    33  	var extarg struct {
    34  		Name    string
    35  		Type    string
    36  		Indexed bool
    37  	}
    38  	err := json.Unmarshal(data, &extarg)
    39  	if err != nil {
    40  		return fmt.Errorf("argument json err: %v", err)
    41  	}
    42  
    43  	a.Type, err = NewType(extarg.Type)
    44  	if err != nil {
    45  		return err
    46  	}
    47  	a.Name = extarg.Name
    48  	a.Indexed = extarg.Indexed
    49  
    50  	return nil
    51  }