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- // Copyright 2018 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 core
- import (
- "bufio"
- "encoding/json"
- "fmt"
- "os"
- "strings"
- "sync"
- "github.com/ethereum/go-ethereum/common/hexutil"
- "github.com/ethereum/go-ethereum/console/prompt"
- "github.com/ethereum/go-ethereum/internal/ethapi"
- "github.com/ethereum/go-ethereum/log"
- )
- type CommandlineUI struct {
- in *bufio.Reader
- mu sync.Mutex
- }
- func NewCommandlineUI() *CommandlineUI {
- return &CommandlineUI{in: bufio.NewReader(os.Stdin)}
- }
- func (ui *CommandlineUI) RegisterUIServer(api *UIServerAPI) {
- // noop
- }
- // readString reads a single line from stdin, trimming if from spaces, enforcing
- // non-emptyness.
- func (ui *CommandlineUI) readString() string {
- for {
- fmt.Printf("> ")
- text, err := ui.in.ReadString('\n')
- if err != nil {
- log.Crit("Failed to read user input", "err", err)
- }
- if text = strings.TrimSpace(text); text != "" {
- return text
- }
- }
- }
- func (ui *CommandlineUI) OnInputRequired(info UserInputRequest) (UserInputResponse, error) {
- fmt.Printf("## %s\n\n%s\n", info.Title, info.Prompt)
- defer fmt.Println("-----------------------")
- if info.IsPassword {
- text, err := prompt.Stdin.PromptPassword("> ")
- if err != nil {
- log.Error("Failed to read password", "error", err)
- return UserInputResponse{}, err
- }
- return UserInputResponse{text}, nil
- }
- text := ui.readString()
- return UserInputResponse{text}, nil
- }
- // confirm returns true if user enters 'Yes', otherwise false
- func (ui *CommandlineUI) confirm() bool {
- fmt.Printf("Approve? [y/N]:\n")
- if ui.readString() == "y" {
- return true
- }
- fmt.Println("-----------------------")
- return false
- }
- // sanitize quotes and truncates 'txt' if longer than 'limit'. If truncated,
- // and ellipsis is added after the quoted string
- func sanitize(txt string, limit int) string {
- if len(txt) > limit {
- return fmt.Sprintf("%q...", txt[:limit])
- }
- return fmt.Sprintf("%q", txt)
- }
- func showMetadata(metadata Metadata) {
- fmt.Printf("Request context:\n\t%v -> %v -> %v\n", metadata.Remote, metadata.Scheme, metadata.Local)
- fmt.Printf("\nAdditional HTTP header data, provided by the external caller:\n")
- fmt.Printf("\tUser-Agent: %v\n\tOrigin: %v\n", sanitize(metadata.UserAgent, 200), sanitize(metadata.Origin, 100))
- }
- // ApproveTx prompt the user for confirmation to request to sign Transaction
- func (ui *CommandlineUI) ApproveTx(request *SignTxRequest) (SignTxResponse, error) {
- ui.mu.Lock()
- defer ui.mu.Unlock()
- weival := request.Transaction.Value.ToInt()
- fmt.Printf("--------- Transaction request-------------\n")
- if to := request.Transaction.To; to != nil {
- fmt.Printf("to: %v\n", to.Original())
- if !to.ValidChecksum() {
- fmt.Printf("\nWARNING: Invalid checksum on to-address!\n\n")
- }
- } else {
- fmt.Printf("to: <contact creation>\n")
- }
- fmt.Printf("from: %v\n", request.Transaction.From.String())
- fmt.Printf("value: %v wei\n", weival)
- fmt.Printf("gas: %v (%v)\n", request.Transaction.Gas, uint64(request.Transaction.Gas))
- fmt.Printf("gasprice: %v wei\n", request.Transaction.GasPrice.ToInt())
- fmt.Printf("nonce: %v (%v)\n", request.Transaction.Nonce, uint64(request.Transaction.Nonce))
- if chainId := request.Transaction.ChainID; chainId != nil {
- fmt.Printf("chainid: %v\n", chainId)
- }
- if list := request.Transaction.AccessList; list != nil {
- fmt.Printf("Accesslist\n")
- for i, el := range *list {
- fmt.Printf(" %d. %v\n", i, el.Address)
- for j, slot := range el.StorageKeys {
- fmt.Printf(" %d. %v\n", j, slot)
- }
- }
- }
- if request.Transaction.Data != nil {
- d := *request.Transaction.Data
- if len(d) > 0 {
- fmt.Printf("data: %v\n", hexutil.Encode(d))
- }
- }
- if request.Callinfo != nil {
- fmt.Printf("\nTransaction validation:\n")
- for _, m := range request.Callinfo {
- fmt.Printf(" * %s : %s\n", m.Typ, m.Message)
- }
- fmt.Println()
- }
- fmt.Printf("\n")
- showMetadata(request.Meta)
- fmt.Printf("-------------------------------------------\n")
- if !ui.confirm() {
- return SignTxResponse{request.Transaction, false}, nil
- }
- return SignTxResponse{request.Transaction, true}, nil
- }
- // ApproveSignData prompt the user for confirmation to request to sign data
- func (ui *CommandlineUI) ApproveSignData(request *SignDataRequest) (SignDataResponse, error) {
- ui.mu.Lock()
- defer ui.mu.Unlock()
- fmt.Printf("-------- Sign data request--------------\n")
- fmt.Printf("Account: %s\n", request.Address.String())
- if len(request.Callinfo) != 0 {
- fmt.Printf("\nValidation messages:\n")
- for _, m := range request.Callinfo {
- fmt.Printf(" * %s : %s\n", m.Typ, m.Message)
- }
- fmt.Println()
- }
- fmt.Printf("messages:\n")
- for _, nvt := range request.Messages {
- fmt.Printf("\u00a0\u00a0%v\n", strings.TrimSpace(nvt.Pprint(1)))
- }
- fmt.Printf("raw data: \n\t%q\n", request.Rawdata)
- fmt.Printf("data hash: %v\n", request.Hash)
- fmt.Printf("-------------------------------------------\n")
- showMetadata(request.Meta)
- if !ui.confirm() {
- return SignDataResponse{false}, nil
- }
- return SignDataResponse{true}, nil
- }
- // ApproveListing prompt the user for confirmation to list accounts
- // the list of accounts to list can be modified by the UI
- func (ui *CommandlineUI) ApproveListing(request *ListRequest) (ListResponse, error) {
- ui.mu.Lock()
- defer ui.mu.Unlock()
- fmt.Printf("-------- List Account request--------------\n")
- fmt.Printf("A request has been made to list all accounts. \n")
- fmt.Printf("You can select which accounts the caller can see\n")
- for _, account := range request.Accounts {
- fmt.Printf(" [x] %v\n", account.Address.Hex())
- fmt.Printf(" URL: %v\n", account.URL)
- }
- fmt.Printf("-------------------------------------------\n")
- showMetadata(request.Meta)
- if !ui.confirm() {
- return ListResponse{nil}, nil
- }
- return ListResponse{request.Accounts}, nil
- }
- // ApproveNewAccount prompt the user for confirmation to create new Account, and reveal to caller
- func (ui *CommandlineUI) ApproveNewAccount(request *NewAccountRequest) (NewAccountResponse, error) {
- ui.mu.Lock()
- defer ui.mu.Unlock()
- fmt.Printf("-------- New Account request--------------\n\n")
- fmt.Printf("A request has been made to create a new account. \n")
- fmt.Printf("Approving this operation means that a new account is created,\n")
- fmt.Printf("and the address is returned to the external caller\n\n")
- showMetadata(request.Meta)
- if !ui.confirm() {
- return NewAccountResponse{false}, nil
- }
- return NewAccountResponse{true}, nil
- }
- // ShowError displays error message to user
- func (ui *CommandlineUI) ShowError(message string) {
- fmt.Printf("## Error \n%s\n", message)
- fmt.Printf("-------------------------------------------\n")
- }
- // ShowInfo displays info message to user
- func (ui *CommandlineUI) ShowInfo(message string) {
- fmt.Printf("## Info \n%s\n", message)
- }
- func (ui *CommandlineUI) OnApprovedTx(tx ethapi.SignTransactionResult) {
- fmt.Printf("Transaction signed:\n ")
- if jsn, err := json.MarshalIndent(tx.Tx, " ", " "); err != nil {
- fmt.Printf("WARN: marshalling error %v\n", err)
- } else {
- fmt.Println(string(jsn))
- }
- }
- func (ui *CommandlineUI) OnSignerStartup(info StartupInfo) {
- fmt.Printf("------- Signer info -------\n")
- for k, v := range info.Info {
- fmt.Printf("* %v : %v\n", k, v)
- }
- }
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