path: root/rpc/api/web3_args.go

// Copyright 2015 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package api

import (
    "encoding/json"

    "github.com/ethereum/go-ethereum/rpc/shared"
)

type Sha3Args struct {
    Data string
}

func (args *Sha3Args) UnmarshalJSON(b []byte) (err error) {
    var obj []interface{}
    if err := json.Unmarshal(b, &obj); err != nil {
        return shared.NewDecodeParamError(err.Error())
    }

    if len(obj) < 1 {
        return shared.NewInsufficientParamsError(len(obj), 1)
    }

    argstr, ok := obj[0].(string)
    if !ok {
        return shared.NewInvalidTypeError("data", "is not a string")
    }
    args.Data = argstr
    return nil
}