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path: root/signer/core/stdioui.go
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// Copyright 2018 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
//

package core

import (
    "context"
    "sync"

    "github.com/ethereum/go-ethereum/internal/ethapi"
    "github.com/ethereum/go-ethereum/log"
    "github.com/ethereum/go-ethereum/rpc"
)

type StdIOUI struct {
    client rpc.Client
    mu     sync.Mutex
}

func NewStdIOUI() *StdIOUI {
    client, err := rpc.DialContext(context.Background(), "stdio://")
    if err != nil {
        log.Crit("Could not create stdio client", "err", err)
    }
    ui := &StdIOUI{client: *client}
    return ui
}

func (ui *StdIOUI) RegisterUIServer(api *UIServerAPI) {
    ui.client.RegisterName("clef", api)
}

// dispatch sends a request over the stdio
func (ui *StdIOUI) dispatch(serviceMethod string, args interface{}, reply interface{}) error {
    err := ui.client.Call(&reply, serviceMethod, args)
    if err != nil {
        log.Info("Error", "exc", err.Error())
    }
    return err
}

// notify sends a request over the stdio, and does not listen for a response
func (ui *StdIOUI) notify(serviceMethod string, args interface{}) error {
    ctx := context.Background()
    err := ui.client.Notify(ctx, serviceMethod, args)
    if err != nil {
        log.Info("Error", "exc", err.Error())
    }
    return err
}

func (ui *StdIOUI) ApproveTx(request *SignTxRequest) (SignTxResponse, error) {
    var result SignTxResponse
    err := ui.dispatch("ui_approveTx", request, &result)
    return result, err
}

func (ui *StdIOUI) ApproveSignData(request *SignDataRequest) (SignDataResponse, error) {
    var result SignDataResponse
    err := ui.dispatch("ui_approveSignData", request, &result)
    return result, err
}

func (ui *StdIOUI) ApproveListing(request *ListRequest) (ListResponse, error) {
    var result ListResponse
    err := ui.dispatch("ui_approveListing", request, &result)
    return result, err
}

func (ui *StdIOUI) ApproveNewAccount(request *NewAccountRequest) (NewAccountResponse, error) {
    var result NewAccountResponse
    err := ui.dispatch("ui_approveNewAccount", request, &result)
    return result, err
}

func (ui *StdIOUI) ShowError(message string) {
    err := ui.notify("ui_showError", &Message{message})
    if err != nil {
        log.Info("Error calling 'ui_showError'", "exc", err.Error(), "msg", message)
    }
}

func (ui *StdIOUI) ShowInfo(message string) {
    err := ui.notify("ui_showInfo", Message{message})
    if err != nil {
        log.Info("Error calling 'ui_showInfo'", "exc", err.Error(), "msg", message)
    }
}
func (ui *StdIOUI) OnApprovedTx(tx ethapi.SignTransactionResult) {
    err := ui.notify("ui_onApprovedTx", tx)
    if err != nil {
        log.Info("Error calling 'ui_onApprovedTx'", "exc", err.Error(), "tx", tx)
    }
}

func (ui *StdIOUI) OnSignerStartup(info StartupInfo) {
    err := ui.notify("ui_onSignerStartup", info)
    if err != nil {
        log.Info("Error calling 'ui_onSignerStartup'", "exc", err.Error(), "info", info)
    }
}
func (ui *StdIOUI) OnInputRequired(info UserInputRequest) (UserInputResponse, error) {
    var result UserInputResponse
    err := ui.dispatch("ui_onInputRequired", info, &result)
    if err != nil {
        log.Info("Error calling 'ui_onInputRequired'", "exc", err.Error(), "info", info)
    }
    return result, err
}