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-rw-r--r--app/scripts/lib/message-manager.js137
1 files changed, 133 insertions, 4 deletions
diff --git a/app/scripts/lib/message-manager.js b/app/scripts/lib/message-manager.js
index f52e048e0..901367f04 100644
--- a/app/scripts/lib/message-manager.js
+++ b/app/scripts/lib/message-manager.js
@@ -3,8 +3,37 @@ const ObservableStore = require('obs-store')
const ethUtil = require('ethereumjs-util')
const createId = require('./random-id')
+/**
+ * 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.
+ *
+ */
module.exports = 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 (opts) {
super()
this.memStore = new ObservableStore({
@@ -14,15 +43,35 @@ module.exports = class MessageManager extends EventEmitter {
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.
+ * @returns {number} The id of the newly created message.
+ *
+ */
addUnapprovedMessage (msgParams) {
msgParams.data = normalizeMsgData(msgParams.data)
// create txData obj with parameters and meta data
@@ -42,24 +91,61 @@ module.exports = class MessageManager extends EventEmitter {
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
@@ -67,19 +153,40 @@ module.exports = class MessageManager extends EventEmitter {
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')
}
- //
- // PRIVATE METHODS
- //
-
+ /**
+ * 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}".')
@@ -91,6 +198,14 @@ module.exports = class MessageManager extends EventEmitter {
}
}
+ /**
+ * 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) {
@@ -99,6 +214,13 @@ module.exports = class MessageManager extends EventEmitter {
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
@@ -108,6 +230,13 @@ module.exports = class MessageManager extends EventEmitter {
}
+/**
+ * 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