You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
285 lines
9.7 KiB
285 lines
9.7 KiB
import EventEmitter from 'events'
|
|
import ObservableStore from 'obs-store'
|
|
import ethUtil from 'ethereumjs-util'
|
|
import { ethErrors } from 'eth-json-rpc-errors'
|
|
import createId from './random-id'
|
|
import { MESSAGE_TYPE } from './enums'
|
|
|
|
/**
|
|
* Represents, and contains data about, an 'eth_sign' type signature request. These are created when a signature for
|
|
* an eth_sign call is requested.
|
|
*
|
|
* @see {@link https://github.com/ethereum/wiki/wiki/JSON-RPC#eth_sign}
|
|
*
|
|
* @typedef {Object} Message
|
|
* @property {number} id An id to track and identify the message object
|
|
* @property {Object} msgParams The parameters to pass to the eth_sign method once the signature request is approved.
|
|
* @property {Object} msgParams.metamaskId Added to msgParams for tracking and identification within MetaMask.
|
|
* @property {string} msgParams.data A hex string conversion of the raw buffer data of the signature request
|
|
* @property {number} time The epoch time at which the this message was created
|
|
* @property {string} status Indicates whether the signature request is 'unapproved', 'approved', 'signed' or 'rejected'
|
|
* @property {string} type The json-prc signing method for which a signature request has been made. A 'Message' with
|
|
* always have a 'eth_sign' type.
|
|
*
|
|
*/
|
|
|
|
export default class MessageManager extends EventEmitter {
|
|
|
|
/**
|
|
* Controller in charge of managing - storing, adding, removing, updating - Messages.
|
|
*
|
|
* @typedef {Object} MessageManager
|
|
* @param {Object} opts @deprecated
|
|
* @property {Object} memStore The observable store where Messages are saved.
|
|
* @property {Object} memStore.unapprovedMsgs A collection of all Messages in the 'unapproved' state
|
|
* @property {number} memStore.unapprovedMsgCount The count of all Messages in this.memStore.unapprobedMsgs
|
|
* @property {array} messages Holds all messages that have been created by this MessageManager
|
|
*
|
|
*/
|
|
constructor () {
|
|
super()
|
|
this.memStore = new ObservableStore({
|
|
unapprovedMsgs: {},
|
|
unapprovedMsgCount: 0,
|
|
})
|
|
this.messages = []
|
|
}
|
|
|
|
/**
|
|
* A getter for the number of 'unapproved' Messages in this.messages
|
|
*
|
|
* @returns {number} - The number of 'unapproved' Messages in this.messages
|
|
*
|
|
*/
|
|
get unapprovedMsgCount () {
|
|
return Object.keys(this.getUnapprovedMsgs()).length
|
|
}
|
|
|
|
/**
|
|
* A getter for the 'unapproved' Messages in this.messages
|
|
*
|
|
* @returns {Object} - An index of Message ids to Messages, for all 'unapproved' Messages in this.messages
|
|
*
|
|
*/
|
|
getUnapprovedMsgs () {
|
|
return this.messages.filter((msg) => msg.status === 'unapproved')
|
|
.reduce((result, msg) => {
|
|
result[msg.id] = msg; return result
|
|
}, {})
|
|
}
|
|
|
|
/**
|
|
* Creates a new Message with an 'unapproved' status using the passed msgParams. this.addMsg is called to add the
|
|
* new Message to this.messages, and to save the unapproved Messages from that list to this.memStore.
|
|
*
|
|
* @param {Object} msgParams - The params for the eth_sign call to be made after the message is approved.
|
|
* @param {Object} req (optional) The original request object possibly containing the origin
|
|
* @returns {promise} - after signature has been
|
|
*
|
|
*/
|
|
addUnapprovedMessageAsync (msgParams, req) {
|
|
return new Promise((resolve, reject) => {
|
|
const msgId = this.addUnapprovedMessage(msgParams, req)
|
|
// await finished
|
|
this.once(`${msgId}:finished`, (data) => {
|
|
switch (data.status) {
|
|
case 'signed':
|
|
return resolve(data.rawSig)
|
|
case 'rejected':
|
|
return reject(ethErrors.provider.userRejectedRequest('MetaMask Message Signature: User denied message signature.'))
|
|
default:
|
|
return reject(new Error(`MetaMask Message Signature: Unknown problem: ${JSON.stringify(msgParams)}`))
|
|
}
|
|
})
|
|
})
|
|
}
|
|
|
|
/**
|
|
* Creates a new Message with an 'unapproved' status using the passed msgParams. this.addMsg is called to add the
|
|
* new Message to this.messages, and to save the unapproved Messages from that list to this.memStore.
|
|
*
|
|
* @param {Object} msgParams - The params for the eth_sign call to be made after the message is approved.
|
|
* @param {Object} req (optional) The original request object where the origin may be specificied
|
|
* @returns {number} - The id of the newly created message.
|
|
*
|
|
*/
|
|
addUnapprovedMessage (msgParams, req) {
|
|
// add origin from request
|
|
if (req) {
|
|
msgParams.origin = req.origin
|
|
}
|
|
msgParams.data = normalizeMsgData(msgParams.data)
|
|
// create txData obj with parameters and meta data
|
|
const time = (new Date()).getTime()
|
|
const msgId = createId()
|
|
const msgData = {
|
|
id: msgId,
|
|
msgParams: msgParams,
|
|
time: time,
|
|
status: 'unapproved',
|
|
type: MESSAGE_TYPE.ETH_SIGN,
|
|
}
|
|
this.addMsg(msgData)
|
|
|
|
// signal update
|
|
this.emit('update')
|
|
return msgId
|
|
}
|
|
|
|
/**
|
|
* Adds a passed Message to this.messages, and calls this._saveMsgList() to save the unapproved Messages from that
|
|
* list to this.memStore.
|
|
*
|
|
* @param {Message} msg - The Message to add to this.messages
|
|
*
|
|
*/
|
|
addMsg (msg) {
|
|
this.messages.push(msg)
|
|
this._saveMsgList()
|
|
}
|
|
|
|
/**
|
|
* Returns a specified Message.
|
|
*
|
|
* @param {number} msgId - The id of the Message to get
|
|
* @returns {Message|undefined} - The Message with the id that matches the passed msgId, or undefined if no Message has that id.
|
|
*
|
|
*/
|
|
getMsg (msgId) {
|
|
return this.messages.find((msg) => msg.id === msgId)
|
|
}
|
|
|
|
/**
|
|
* Approves a Message. Sets the message status via a call to this.setMsgStatusApproved, and returns a promise with
|
|
* any the message params modified for proper signing.
|
|
*
|
|
* @param {Object} msgParams - The msgParams to be used when eth_sign is called, plus data added by MetaMask.
|
|
* @param {Object} msgParams.metamaskId Added to msgParams for tracking and identification within MetaMask.
|
|
* @returns {Promise<object>} - Promises the msgParams object with metamaskId removed.
|
|
*
|
|
*/
|
|
approveMessage (msgParams) {
|
|
this.setMsgStatusApproved(msgParams.metamaskId)
|
|
return this.prepMsgForSigning(msgParams)
|
|
}
|
|
|
|
/**
|
|
* Sets a Message status to 'approved' via a call to this._setMsgStatus.
|
|
*
|
|
* @param {number} msgId - The id of the Message to approve.
|
|
*
|
|
*/
|
|
setMsgStatusApproved (msgId) {
|
|
this._setMsgStatus(msgId, 'approved')
|
|
}
|
|
|
|
/**
|
|
* Sets a Message status to 'signed' via a call to this._setMsgStatus and updates that Message in this.messages by
|
|
* adding the raw signature data of the signature request to the Message
|
|
*
|
|
* @param {number} msgId - The id of the Message to sign.
|
|
* @param {buffer} rawSig - The raw data of the signature request
|
|
*
|
|
*/
|
|
setMsgStatusSigned (msgId, rawSig) {
|
|
const msg = this.getMsg(msgId)
|
|
msg.rawSig = rawSig
|
|
this._updateMsg(msg)
|
|
this._setMsgStatus(msgId, 'signed')
|
|
}
|
|
|
|
/**
|
|
* Removes the metamaskId property from passed msgParams and returns a promise which resolves the updated msgParams
|
|
*
|
|
* @param {Object} msgParams - The msgParams to modify
|
|
* @returns {Promise<object>} - Promises the msgParams with the metamaskId property removed
|
|
*
|
|
*/
|
|
prepMsgForSigning (msgParams) {
|
|
delete msgParams.metamaskId
|
|
return Promise.resolve(msgParams)
|
|
}
|
|
|
|
/**
|
|
* Sets a Message status to 'rejected' via a call to this._setMsgStatus.
|
|
*
|
|
* @param {number} msgId - The id of the Message to reject.
|
|
*
|
|
*/
|
|
rejectMsg (msgId) {
|
|
this._setMsgStatus(msgId, 'rejected')
|
|
}
|
|
|
|
/**
|
|
* Updates the status of a Message in this.messages via a call to this._updateMsg
|
|
*
|
|
* @private
|
|
* @param {number} msgId - The id of the Message to update.
|
|
* @param {string} status - The new status of the Message.
|
|
* @throws A 'MessageManager - Message not found for id: "${msgId}".' if there is no Message in this.messages with an
|
|
* id equal to the passed msgId
|
|
* @fires An event with a name equal to `${msgId}:${status}`. The Message is also fired.
|
|
* @fires If status is 'rejected' or 'signed', an event with a name equal to `${msgId}:finished` is fired along with the message
|
|
*
|
|
*/
|
|
_setMsgStatus (msgId, status) {
|
|
const msg = this.getMsg(msgId)
|
|
if (!msg) {
|
|
throw new Error('MessageManager - Message not found for id: "${msgId}".')
|
|
}
|
|
msg.status = status
|
|
this._updateMsg(msg)
|
|
this.emit(`${msgId}:${status}`, msg)
|
|
if (status === 'rejected' || status === 'signed') {
|
|
this.emit(`${msgId}:finished`, msg)
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sets a Message in this.messages to the passed Message if the ids are equal. Then saves the unapprovedMsg list to
|
|
* storage via this._saveMsgList
|
|
*
|
|
* @private
|
|
* @param {msg} Message - A Message that will replace an existing Message (with the same id) in this.messages
|
|
*
|
|
*/
|
|
_updateMsg (msg) {
|
|
const index = this.messages.findIndex((message) => message.id === msg.id)
|
|
if (index !== -1) {
|
|
this.messages[index] = msg
|
|
}
|
|
this._saveMsgList()
|
|
}
|
|
|
|
/**
|
|
* Saves the unapproved messages, and their count, to this.memStore
|
|
*
|
|
* @private
|
|
* @fires 'updateBadge'
|
|
*
|
|
*/
|
|
_saveMsgList () {
|
|
const unapprovedMsgs = this.getUnapprovedMsgs()
|
|
const unapprovedMsgCount = Object.keys(unapprovedMsgs).length
|
|
this.memStore.updateState({ unapprovedMsgs, unapprovedMsgCount })
|
|
this.emit('updateBadge')
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* A helper function that converts raw buffer data to a hex, or just returns the data if it is already formatted as a hex.
|
|
*
|
|
* @param {any} data - The buffer data to convert to a hex
|
|
* @returns {string} - A hex string conversion of the buffer data
|
|
*
|
|
*/
|
|
function normalizeMsgData (data) {
|
|
if (data.slice(0, 2) === '0x') {
|
|
// data is already hex
|
|
return data
|
|
} else {
|
|
// data is unicode, convert to hex
|
|
return ethUtil.bufferToHex(Buffer.from(data, 'utf8'))
|
|
}
|
|
}
|
|
|