mirror of
https://github.com/kremalicious/metamask-extension.git
synced 2024-11-23 10:30:04 +01:00
336 lines
11 KiB
JavaScript
336 lines
11 KiB
JavaScript
import EventEmitter from 'events';
|
|
import { ObservableStore } from '@metamask/obs-store';
|
|
import { bufferToHex, stripHexPrefix } from 'ethereumjs-util';
|
|
import { ethErrors } from 'eth-rpc-errors';
|
|
import log from 'loglevel';
|
|
import { MESSAGE_TYPE } from '../../../shared/constants/app';
|
|
import { METAMASK_CONTROLLER_EVENTS } from '../metamask-controller';
|
|
import createId from '../../../shared/modules/random-id';
|
|
import { addHexPrefix } from './util';
|
|
|
|
const hexRe = /^[0-9A-Fa-f]+$/gu;
|
|
|
|
/**
|
|
* Represents, and contains data about, an 'personal_sign' type signature request. These are created when a
|
|
* signature for an personal_sign call is requested.
|
|
*
|
|
* @see {@link https://web3js.readthedocs.io/en/1.0/web3-eth-personal.html#sign}
|
|
*
|
|
* @typedef {Object} PersonalMessage
|
|
* @property {number} id An id to track and identify the message object
|
|
* @property {Object} msgParams The parameters to pass to the personal_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' will
|
|
* always have a 'personal_sign' type.
|
|
*
|
|
*/
|
|
|
|
export default class PersonalMessageManager extends EventEmitter {
|
|
/**
|
|
* Controller in charge of managing - storing, adding, removing, updating - PersonalMessage.
|
|
*
|
|
* @typedef {Object} PersonalMessageManager
|
|
* @property {Object} memStore The observable store where PersonalMessage are saved.
|
|
* @property {Object} memStore.unapprovedPersonalMsgs A collection of all PersonalMessages in the 'unapproved' state
|
|
* @property {number} memStore.unapprovedPersonalMsgCount The count of all PersonalMessages in this.memStore.unapprobedMsgs
|
|
* @property {Array} messages Holds all messages that have been created by this PersonalMessageManager
|
|
*
|
|
*/
|
|
constructor() {
|
|
super();
|
|
this.memStore = new ObservableStore({
|
|
unapprovedPersonalMsgs: {},
|
|
unapprovedPersonalMsgCount: 0,
|
|
});
|
|
this.messages = [];
|
|
}
|
|
|
|
/**
|
|
* A getter for the number of 'unapproved' PersonalMessages in this.messages
|
|
*
|
|
* @returns {number} The number of 'unapproved' PersonalMessages in this.messages
|
|
*
|
|
*/
|
|
get unapprovedPersonalMsgCount() {
|
|
return Object.keys(this.getUnapprovedMsgs()).length;
|
|
}
|
|
|
|
/**
|
|
* A getter for the 'unapproved' PersonalMessages in this.messages
|
|
*
|
|
* @returns {Object} An index of PersonalMessage ids to PersonalMessages, for all 'unapproved' PersonalMessages in
|
|
* this.messages
|
|
*
|
|
*/
|
|
getUnapprovedMsgs() {
|
|
return this.messages
|
|
.filter((msg) => msg.status === 'unapproved')
|
|
.reduce((result, msg) => {
|
|
result[msg.id] = msg;
|
|
return result;
|
|
}, {});
|
|
}
|
|
|
|
/**
|
|
* Creates a new PersonalMessage with an 'unapproved' status using the passed msgParams. this.addMsg is called to add
|
|
* the new PersonalMessage to this.messages, and to save the unapproved PersonalMessages 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] - The original request object possibly containing the origin
|
|
* @returns {promise} When the message has been signed or rejected
|
|
*
|
|
*/
|
|
addUnapprovedMessageAsync(msgParams, req) {
|
|
return new Promise((resolve, reject) => {
|
|
if (!msgParams.from) {
|
|
reject(
|
|
new Error('MetaMask Message Signature: from field is required.'),
|
|
);
|
|
return;
|
|
}
|
|
const msgId = this.addUnapprovedMessage(msgParams, req);
|
|
this.once(`${msgId}:finished`, (data) => {
|
|
switch (data.status) {
|
|
case 'signed':
|
|
resolve(data.rawSig);
|
|
return;
|
|
case 'rejected':
|
|
reject(
|
|
ethErrors.provider.userRejectedRequest(
|
|
'MetaMask Message Signature: User denied message signature.',
|
|
),
|
|
);
|
|
return;
|
|
default:
|
|
reject(
|
|
new Error(
|
|
`MetaMask Message Signature: Unknown problem: ${JSON.stringify(
|
|
msgParams,
|
|
)}`,
|
|
),
|
|
);
|
|
}
|
|
});
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Creates a new PersonalMessage with an 'unapproved' status using the passed msgParams. this.addMsg is called to add
|
|
* the new PersonalMessage to this.messages, and to save the unapproved PersonalMessages 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] - The original request object possibly containing the origin
|
|
* @returns {number} The id of the newly created PersonalMessage.
|
|
*
|
|
*/
|
|
addUnapprovedMessage(msgParams, req) {
|
|
log.debug(
|
|
`PersonalMessageManager addUnapprovedMessage: ${JSON.stringify(
|
|
msgParams,
|
|
)}`,
|
|
);
|
|
// add origin from request
|
|
if (req) {
|
|
msgParams.origin = req.origin;
|
|
}
|
|
msgParams.data = this.normalizeMsgData(msgParams.data);
|
|
// create txData obj with parameters and meta data
|
|
const time = new Date().getTime();
|
|
const msgId = createId();
|
|
const msgData = {
|
|
id: msgId,
|
|
msgParams,
|
|
time,
|
|
status: 'unapproved',
|
|
type: MESSAGE_TYPE.PERSONAL_SIGN,
|
|
};
|
|
this.addMsg(msgData);
|
|
|
|
// signal update
|
|
this.emit('update');
|
|
return msgId;
|
|
}
|
|
|
|
/**
|
|
* Adds a passed PersonalMessage to this.messages, and calls this._saveMsgList() to save the unapproved PersonalMessages from that
|
|
* list to this.memStore.
|
|
*
|
|
* @param {Message} msg - The PersonalMessage to add to this.messages
|
|
*
|
|
*/
|
|
addMsg(msg) {
|
|
this.messages.push(msg);
|
|
this._saveMsgList();
|
|
}
|
|
|
|
/**
|
|
* Returns a specified PersonalMessage.
|
|
*
|
|
* @param {number} msgId - The id of the PersonalMessage to get
|
|
* @returns {PersonalMessage|undefined} The PersonalMessage with the id that matches the passed msgId, or undefined
|
|
* if no PersonalMessage has that id.
|
|
*
|
|
*/
|
|
getMsg(msgId) {
|
|
return this.messages.find((msg) => msg.id === msgId);
|
|
}
|
|
|
|
/**
|
|
* Approves a PersonalMessage. 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 PersonalMessage status to 'approved' via a call to this._setMsgStatus.
|
|
*
|
|
* @param {number} msgId - The id of the PersonalMessage to approve.
|
|
*
|
|
*/
|
|
setMsgStatusApproved(msgId) {
|
|
this._setMsgStatus(msgId, 'approved');
|
|
}
|
|
|
|
/**
|
|
* Sets a PersonalMessage status to 'signed' via a call to this._setMsgStatus and updates that PersonalMessage in
|
|
* this.messages by adding the raw signature data of the signature request to the PersonalMessage
|
|
*
|
|
* @param {number} msgId - The id of the PersonalMessage 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 PersonalMessage status to 'rejected' via a call to this._setMsgStatus.
|
|
*
|
|
* @param {number} msgId - The id of the PersonalMessage to reject.
|
|
*
|
|
*/
|
|
rejectMsg(msgId) {
|
|
this._setMsgStatus(msgId, 'rejected');
|
|
}
|
|
|
|
/**
|
|
* Clears all unapproved messages from memory.
|
|
*/
|
|
clearUnapproved() {
|
|
this.messages = this.messages.filter((msg) => msg.status !== 'unapproved');
|
|
this._saveMsgList();
|
|
}
|
|
|
|
/**
|
|
* Updates the status of a PersonalMessage in this.messages via a call to this._updateMsg
|
|
*
|
|
* @private
|
|
* @param {number} msgId - The id of the PersonalMessage to update.
|
|
* @param {string} status - The new status of the PersonalMessage.
|
|
* @throws A 'PersonalMessageManager - PersonalMessage not found for id: "${msgId}".' if there is no PersonalMessage
|
|
* in this.messages with an id equal to the passed msgId
|
|
* @fires An event with a name equal to `${msgId}:${status}`. The PersonalMessage is also fired.
|
|
* @fires If status is 'rejected' or 'signed', an event with a name equal to `${msgId}:finished` is fired along
|
|
* with the PersonalMessage
|
|
*
|
|
*/
|
|
_setMsgStatus(msgId, status) {
|
|
const msg = this.getMsg(msgId);
|
|
if (!msg) {
|
|
throw new Error(
|
|
`PersonalMessageManager - Message not found for id: "${msgId}".`,
|
|
);
|
|
}
|
|
msg.status = status;
|
|
this._updateMsg(msg);
|
|
this.emit(`${msgId}:${status}`, msg);
|
|
if (status === 'rejected' || status === 'signed') {
|
|
this.emit(`${msgId}:finished`, msg);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sets a PersonalMessage in this.messages to the passed PersonalMessage if the ids are equal. Then saves the
|
|
* unapprovedPersonalMsgs index to storage via this._saveMsgList
|
|
*
|
|
* @private
|
|
* @param {msg} PersonalMessage - A PersonalMessage that will replace an existing PersonalMessage (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 PersonalMessages, and their count, to this.memStore
|
|
*
|
|
* @private
|
|
* @fires 'updateBadge'
|
|
*
|
|
*/
|
|
_saveMsgList() {
|
|
const unapprovedPersonalMsgs = this.getUnapprovedMsgs();
|
|
const unapprovedPersonalMsgCount = Object.keys(unapprovedPersonalMsgs)
|
|
.length;
|
|
this.memStore.updateState({
|
|
unapprovedPersonalMsgs,
|
|
unapprovedPersonalMsgCount,
|
|
});
|
|
this.emit(METAMASK_CONTROLLER_EVENTS.UPDATE_BADGE);
|
|
}
|
|
|
|
/**
|
|
* 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
|
|
*
|
|
*/
|
|
normalizeMsgData(data) {
|
|
try {
|
|
const stripped = stripHexPrefix(data);
|
|
if (stripped.match(hexRe)) {
|
|
return addHexPrefix(stripped);
|
|
}
|
|
} catch (e) {
|
|
log.debug(`Message was not hex encoded, interpreting as utf8.`);
|
|
}
|
|
|
|
return bufferToHex(Buffer.from(data, 'utf8'));
|
|
}
|
|
}
|