forked from cerc-io/plugeth
6f45fa66d8
When opening the wallet, ask for passphrase as well as for the PIN and return the relevant error (PIN/passphrase required). Open must then be called again with either PIN or passphrase to advance the process. This also updates the console bridge to support passphrase authentication.
384 lines
12 KiB
Go
384 lines
12 KiB
Go
// Copyright 2016 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package console
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import (
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"encoding/json"
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"fmt"
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"io"
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"strings"
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"time"
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"github.com/ethereum/go-ethereum/accounts/usbwallet"
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"github.com/ethereum/go-ethereum/log"
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"github.com/ethereum/go-ethereum/rpc"
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"github.com/robertkrimen/otto"
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)
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// bridge is a collection of JavaScript utility methods to bride the .js runtime
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// environment and the Go RPC connection backing the remote method calls.
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type bridge struct {
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client *rpc.Client // RPC client to execute Ethereum requests through
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prompter UserPrompter // Input prompter to allow interactive user feedback
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printer io.Writer // Output writer to serialize any display strings to
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}
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// newBridge creates a new JavaScript wrapper around an RPC client.
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func newBridge(client *rpc.Client, prompter UserPrompter, printer io.Writer) *bridge {
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return &bridge{
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client: client,
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prompter: prompter,
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printer: printer,
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}
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}
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// NewAccount is a wrapper around the personal.newAccount RPC method that uses a
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// non-echoing password prompt to acquire the passphrase and executes the original
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// RPC method (saved in jeth.newAccount) with it to actually execute the RPC call.
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func (b *bridge) NewAccount(call otto.FunctionCall) (response otto.Value) {
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var (
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password string
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confirm string
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err error
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)
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switch {
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// No password was specified, prompt the user for it
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case len(call.ArgumentList) == 0:
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if password, err = b.prompter.PromptPassword("Passphrase: "); err != nil {
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throwJSException(err.Error())
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}
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if confirm, err = b.prompter.PromptPassword("Repeat passphrase: "); err != nil {
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throwJSException(err.Error())
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}
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if password != confirm {
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throwJSException("passphrases don't match!")
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}
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// A single string password was specified, use that
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case len(call.ArgumentList) == 1 && call.Argument(0).IsString():
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password, _ = call.Argument(0).ToString()
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// Otherwise fail with some error
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default:
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throwJSException("expected 0 or 1 string argument")
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}
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// Password acquired, execute the call and return
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ret, err := call.Otto.Call("jeth.newAccount", nil, password)
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if err != nil {
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throwJSException(err.Error())
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}
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return ret
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}
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// OpenWallet is a wrapper around personal.openWallet which can interpret and
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// react to certain error messages, such as the Trezor PIN matrix request.
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func (b *bridge) OpenWallet(call otto.FunctionCall) (response otto.Value) {
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// Make sure we have a wallet specified to open
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if !call.Argument(0).IsString() {
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throwJSException("first argument must be the wallet URL to open")
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}
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wallet := call.Argument(0)
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var passwd otto.Value
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if call.Argument(1).IsUndefined() || call.Argument(1).IsNull() {
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passwd, _ = otto.ToValue("")
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} else {
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passwd = call.Argument(1)
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}
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// Open the wallet and return if successful in itself
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val, err := call.Otto.Call("jeth.openWallet", nil, wallet, passwd)
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if err == nil {
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return val
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}
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// Wallet open failed, report error unless it's a PIN entry
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if strings.HasSuffix(err.Error(), usbwallet.ErrTrezorPINNeeded.Error()) {
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val, err = b.readPinAndReopenWallet(call)
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if err == nil {
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return val
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}
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}
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// Check if the user needs to input a passphrase
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if !strings.HasSuffix(err.Error(), usbwallet.ErrTrezorPassphraseNeeded.Error()) {
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throwJSException(err.Error())
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}
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val, err = b.readPassphraseAndReopenWallet(call)
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if err != nil {
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throwJSException(err.Error())
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}
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return val
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}
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func (b *bridge) readPassphraseAndReopenWallet(call otto.FunctionCall) (otto.Value, error) {
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var passwd otto.Value
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wallet := call.Argument(0)
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if input, err := b.prompter.PromptPassword("Please enter your passphrase: "); err != nil {
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throwJSException(err.Error())
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} else {
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passwd, _ = otto.ToValue(input)
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}
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return call.Otto.Call("jeth.openWallet", nil, wallet, passwd)
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}
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func (b *bridge) readPinAndReopenWallet(call otto.FunctionCall) (otto.Value, error) {
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var passwd otto.Value
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wallet := call.Argument(0)
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// Trezor PIN matrix input requested, display the matrix to the user and fetch the data
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fmt.Fprintf(b.printer, "Look at the device for number positions\n\n")
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fmt.Fprintf(b.printer, "7 | 8 | 9\n")
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fmt.Fprintf(b.printer, "--+---+--\n")
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fmt.Fprintf(b.printer, "4 | 5 | 6\n")
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fmt.Fprintf(b.printer, "--+---+--\n")
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fmt.Fprintf(b.printer, "1 | 2 | 3\n\n")
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if input, err := b.prompter.PromptPassword("Please enter current PIN: "); err != nil {
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throwJSException(err.Error())
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} else {
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passwd, _ = otto.ToValue(input)
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}
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return call.Otto.Call("jeth.openWallet", nil, wallet, passwd)
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}
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// UnlockAccount is a wrapper around the personal.unlockAccount RPC method that
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// uses a non-echoing password prompt to acquire the passphrase and executes the
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// original RPC method (saved in jeth.unlockAccount) with it to actually execute
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// the RPC call.
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func (b *bridge) UnlockAccount(call otto.FunctionCall) (response otto.Value) {
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// Make sure we have an account specified to unlock
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if !call.Argument(0).IsString() {
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throwJSException("first argument must be the account to unlock")
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}
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account := call.Argument(0)
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// If password is not given or is the null value, prompt the user for it
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var passwd otto.Value
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if call.Argument(1).IsUndefined() || call.Argument(1).IsNull() {
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fmt.Fprintf(b.printer, "Unlock account %s\n", account)
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if input, err := b.prompter.PromptPassword("Passphrase: "); err != nil {
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throwJSException(err.Error())
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} else {
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passwd, _ = otto.ToValue(input)
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}
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} else {
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if !call.Argument(1).IsString() {
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throwJSException("password must be a string")
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}
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passwd = call.Argument(1)
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}
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// Third argument is the duration how long the account must be unlocked.
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duration := otto.NullValue()
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if call.Argument(2).IsDefined() && !call.Argument(2).IsNull() {
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if !call.Argument(2).IsNumber() {
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throwJSException("unlock duration must be a number")
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}
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duration = call.Argument(2)
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}
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// Send the request to the backend and return
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val, err := call.Otto.Call("jeth.unlockAccount", nil, account, passwd, duration)
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if err != nil {
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throwJSException(err.Error())
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}
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return val
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}
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// Sign is a wrapper around the personal.sign RPC method that uses a non-echoing password
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// prompt to acquire the passphrase and executes the original RPC method (saved in
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// jeth.sign) with it to actually execute the RPC call.
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func (b *bridge) Sign(call otto.FunctionCall) (response otto.Value) {
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var (
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message = call.Argument(0)
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account = call.Argument(1)
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passwd = call.Argument(2)
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)
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if !message.IsString() {
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throwJSException("first argument must be the message to sign")
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}
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if !account.IsString() {
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throwJSException("second argument must be the account to sign with")
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}
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// if the password is not given or null ask the user and ensure password is a string
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if passwd.IsUndefined() || passwd.IsNull() {
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fmt.Fprintf(b.printer, "Give password for account %s\n", account)
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if input, err := b.prompter.PromptPassword("Passphrase: "); err != nil {
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throwJSException(err.Error())
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} else {
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passwd, _ = otto.ToValue(input)
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}
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}
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if !passwd.IsString() {
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throwJSException("third argument must be the password to unlock the account")
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}
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// Send the request to the backend and return
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val, err := call.Otto.Call("jeth.sign", nil, message, account, passwd)
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if err != nil {
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throwJSException(err.Error())
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}
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return val
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}
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// Sleep will block the console for the specified number of seconds.
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func (b *bridge) Sleep(call otto.FunctionCall) (response otto.Value) {
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if call.Argument(0).IsNumber() {
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sleep, _ := call.Argument(0).ToInteger()
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time.Sleep(time.Duration(sleep) * time.Second)
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return otto.TrueValue()
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}
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return throwJSException("usage: sleep(<number of seconds>)")
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}
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// SleepBlocks will block the console for a specified number of new blocks optionally
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// until the given timeout is reached.
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func (b *bridge) SleepBlocks(call otto.FunctionCall) (response otto.Value) {
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var (
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blocks = int64(0)
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sleep = int64(9999999999999999) // indefinitely
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)
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// Parse the input parameters for the sleep
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nArgs := len(call.ArgumentList)
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if nArgs == 0 {
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throwJSException("usage: sleepBlocks(<n blocks>[, max sleep in seconds])")
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}
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if nArgs >= 1 {
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if call.Argument(0).IsNumber() {
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blocks, _ = call.Argument(0).ToInteger()
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} else {
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throwJSException("expected number as first argument")
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}
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}
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if nArgs >= 2 {
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if call.Argument(1).IsNumber() {
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sleep, _ = call.Argument(1).ToInteger()
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} else {
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throwJSException("expected number as second argument")
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}
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}
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// go through the console, this will allow web3 to call the appropriate
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// callbacks if a delayed response or notification is received.
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blockNumber := func() int64 {
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result, err := call.Otto.Run("eth.blockNumber")
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if err != nil {
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throwJSException(err.Error())
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}
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block, err := result.ToInteger()
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if err != nil {
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throwJSException(err.Error())
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}
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return block
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}
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// Poll the current block number until either it ot a timeout is reached
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targetBlockNr := blockNumber() + blocks
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deadline := time.Now().Add(time.Duration(sleep) * time.Second)
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for time.Now().Before(deadline) {
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if blockNumber() >= targetBlockNr {
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return otto.TrueValue()
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}
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time.Sleep(time.Second)
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}
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return otto.FalseValue()
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}
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type jsonrpcCall struct {
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ID int64
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Method string
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Params []interface{}
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}
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// Send implements the web3 provider "send" method.
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func (b *bridge) Send(call otto.FunctionCall) (response otto.Value) {
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// Remarshal the request into a Go value.
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JSON, _ := call.Otto.Object("JSON")
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reqVal, err := JSON.Call("stringify", call.Argument(0))
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if err != nil {
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throwJSException(err.Error())
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}
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var (
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rawReq = reqVal.String()
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dec = json.NewDecoder(strings.NewReader(rawReq))
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reqs []jsonrpcCall
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batch bool
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)
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dec.UseNumber() // avoid float64s
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if rawReq[0] == '[' {
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batch = true
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dec.Decode(&reqs)
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} else {
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batch = false
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reqs = make([]jsonrpcCall, 1)
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dec.Decode(&reqs[0])
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}
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// Execute the requests.
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resps, _ := call.Otto.Object("new Array()")
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for _, req := range reqs {
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resp, _ := call.Otto.Object(`({"jsonrpc":"2.0"})`)
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resp.Set("id", req.ID)
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var result json.RawMessage
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err = b.client.Call(&result, req.Method, req.Params...)
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switch err := err.(type) {
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case nil:
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if result == nil {
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// Special case null because it is decoded as an empty
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// raw message for some reason.
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resp.Set("result", otto.NullValue())
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} else {
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resultVal, err := JSON.Call("parse", string(result))
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if err != nil {
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setError(resp, -32603, err.Error())
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} else {
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resp.Set("result", resultVal)
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}
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}
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case rpc.Error:
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setError(resp, err.ErrorCode(), err.Error())
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default:
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setError(resp, -32603, err.Error())
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}
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resps.Call("push", resp)
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}
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// Return the responses either to the callback (if supplied)
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// or directly as the return value.
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if batch {
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response = resps.Value()
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} else {
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response, _ = resps.Get("0")
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}
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if fn := call.Argument(1); fn.Class() == "Function" {
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fn.Call(otto.NullValue(), otto.NullValue(), response)
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return otto.UndefinedValue()
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}
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return response
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}
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func setError(resp *otto.Object, code int, msg string) {
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resp.Set("error", map[string]interface{}{"code": code, "message": msg})
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}
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// throwJSException panics on an otto.Value. The Otto VM will recover from the
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// Go panic and throw msg as a JavaScript error.
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func throwJSException(msg interface{}) otto.Value {
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val, err := otto.ToValue(msg)
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if err != nil {
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log.Error("Failed to serialize JavaScript exception", "exception", msg, "err", err)
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}
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panic(val)
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}
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