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const extension = require('extensionizer')
const {EventEmitter} = require('events')
// HD path differs from eth-hd-keyring - MEW, Parity, Geth and Official Ledger clients use same unusual derivation for Ledger
const hdPathString = `m/44'/60'/0'`
const type = 'Ledger Hardware Keyring'
const ORIGIN = 'http://localhost:9000'
class LedgerKeyring extends EventEmitter {
constructor (opts = {}) {
super()
this.type = type
this.page = 0
this.perPage = 5
this.unlockedAccount = 0
this.paths = {}
this.iframe = null
this.setupIframe()
this.deserialize(opts)
}
setupIframe(){
this.iframe = document.createElement('iframe')
this.iframe.src = ORIGIN
console.log('Injecting ledger iframe')
document.head.appendChild(this.iframe)
/*
Passing messages from iframe to background script
*/
console.log('[LEDGER]: LEDGER FROM-IFRAME LISTENER READY')
}
sendMessage(msg, cb) {
console.log('[LEDGER]: SENDING MESSAGE TO IFRAME', msg)
this.iframe.contentWindow.postMessage({...msg, target: 'LEDGER-IFRAME'}, '*')
window.addEventListener('message', event => {
if(event.origin !== ORIGIN) return false
if (event.data && event.data.action && event.data.action.search(name) !== -1) {
console.log('[LEDGER]: GOT MESAGE FROM IFRAME', event.data)
cb(event.data)
}
})
}
serialize () {
return Promise.resolve({hdPath: this.hdPath, accounts: this.accounts})
}
deserialize (opts = {}) {
this.hdPath = opts.hdPath || hdPathString
this.unlocked = opts.unlocked || false
this.accounts = opts.accounts || []
return Promise.resolve()
}
isUnlocked () {
return this.unlocked
}
setAccountToUnlock (index) {
this.unlockedAccount = parseInt(index, 10)
}
unlock () {
if (this.isUnlocked()) return Promise.resolve('already unlocked')
return new Promise((resolve, reject) => {
this.sendMessage({
action: 'ledger-unlock',
params: {
hdPath: this.hdPath,
},
},
({action, success, payload}) => {
if (success) {
resolve(payload)
} else {
reject(payload)
}
})
})
}
async addAccounts (n = 1) {
return new Promise((resolve, reject) => {
this.unlock()
.then(_ => {
this.sendMessage({
action: 'ledger-add-account',
params: {
n,
},
},
({action, success, payload}) => {
if (success) {
resolve(payload)
} else {
reject(payload)
}
})
})
})
}
getFirstPage () {
this.page = 0
return this.__getPage(1)
}
getNextPage () {
return this.__getPage(1)
}
getPreviousPage () {
return this.__getPage(-1)
}
__getPage (increment) {
this.page += increment
if (this.page <= 0) { this.page = 1 }
return new Promise((resolve, reject) => {
this.unlock()
.then(_ => {
this.sendMessage({
action: 'ledger-get-page',
params: {
page: this.page,
},
},
({action, success, payload}) => {
if (success) {
resolve(payload)
} else {
reject(payload)
}
})
})
})
}
getAccounts () {
return Promise.resolve(this.accounts.slice())
}
removeAccount (address) {
if (!this.accounts.map(a => a.toLowerCase()).includes(address.toLowerCase())) {
throw new Error(`Address ${address} not found in this keyring`)
}
this.accounts = this.accounts.filter(a => a.toLowerCase() !== address.toLowerCase())
}
// tx is an instance of the ethereumjs-transaction class.
async signTransaction (address, tx) {
return new Promise((resolve, reject) => {
this.unlock()
.then(_ => {
console.log('[LEDGER]: sending message ', 'ledger-sign-transaction')
this.sendMessage({
action: 'ledger-sign-transaction',
params: {
address,
tx,
},
},
({action, success, payload}) => {
if (success) {
resolve(payload)
} else {
reject(payload)
}
})
})
})
}
async signMessage (withAccount, data) {
throw new Error('Not supported on this device')
}
// For personal_sign, we need to prefix the message:
async signPersonalMessage (withAccount, message) {
return new Promise((resolve, reject) => {
this.unlock()
.then(_ => {
console.log('[LEDGER]: sending message ', 'ledger-sign-personal-message')
this.sendMessage({
action: 'ledger-sign-personal-message',
params: {
withAccount,
message,
},
},
({action, success, payload}) => {
if (success) {
resolve(payload)
} else {
reject(payload)
}
})
})
})
}
async signTypedData (withAccount, typedData) {
throw new Error('Not supported on this device')
}
async exportAccount (address) {
throw new Error('Not supported on this device')
}
forgetDevice () {
this.accounts = []
this.unlocked = false
this.page = 0
this.unlockedAccount = 0
this.paths = {}
}
}
LedgerKeyring.type = type
module.exports = LedgerKeyring
|
