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trezor-wallet/src/actions/DiscoveryActions.js

328 lines
12 KiB

/* @flow */
import TrezorConnect from 'trezor-connect';
import EthereumjsUtil from 'ethereumjs-util';
import * as DISCOVERY from 'actions/constants/discovery';
import * as ACCOUNT from 'actions/constants/account';
import * as NOTIFICATION from 'actions/constants/notification';
import type {
ThunkAction,
AsyncAction,
PromiseAction,
PayloadAction,
GetState,
Dispatch,
TrezorDevice,
} from 'flowtype';
import type { Discovery, State } from 'reducers/DiscoveryReducer';
import * as BlockchainActions from './BlockchainActions';
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export type DiscoveryStartAction = {
type: typeof DISCOVERY.START,
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device: TrezorDevice,
network: string,
publicKey: string,
chainCode: string,
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basePath: Array<number>,
}
export type DiscoveryWaitingAction = {
type: typeof DISCOVERY.WAITING_FOR_DEVICE | typeof DISCOVERY.WAITING_FOR_BLOCKCHAIN,
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device: TrezorDevice,
network: string
}
export type DiscoveryCompleteAction = {
type: typeof DISCOVERY.COMPLETE,
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device: TrezorDevice,
network: string
}
export type DiscoveryAction = {
type: typeof DISCOVERY.FROM_STORAGE,
payload: State
} | {
type: typeof DISCOVERY.STOP,
device: TrezorDevice
} | DiscoveryStartAction
| DiscoveryWaitingAction
| DiscoveryCompleteAction;
// There are multiple async methods during discovery process (trezor-connect and blockchain actions)
// This method will check after each of async action if process was interrupted (for example by network change or device disconnect)
const isProcessInterrupted = (process?: Discovery): PayloadAction<boolean> => (dispatch: Dispatch, getState: GetState): boolean => {
if (!process) {
return false;
}
const { deviceState, network } = process;
const discoveryProcess: ?Discovery = getState().discovery.find(d => d.deviceState === deviceState && d.network === network);
if (!discoveryProcess) return false;
return discoveryProcess.interrupted;
};
// Private action
// Called from "this.begin", "this.restore", "this.addAccount"
const start = (device: TrezorDevice, network: string, ignoreCompleted?: boolean): ThunkAction => (dispatch: Dispatch, getState: GetState): void => {
const selected = getState().wallet.selectedDevice;
if (!selected) {
// TODO: throw error
console.error('Start discovery: no selected device', device);
return;
} if (selected.path !== device.path) {
console.error('Start discovery: requested device is not selected', device, selected);
return;
} if (!selected.state) {
console.warn("Start discovery: Selected device wasn't authenticated yet...");
return;
} if (selected.connected && !selected.available) {
console.warn('Start discovery: Selected device is unavailable...');
return;
}
const { discovery } = getState();
const discoveryProcess: ?Discovery = discovery.find(d => d.deviceState === device.state && d.network === network);
if (!selected.connected && (!discoveryProcess || !discoveryProcess.completed)) {
dispatch({
type: DISCOVERY.WAITING_FOR_DEVICE,
device,
network,
});
return;
}
const blockchain = getState().blockchain.find(b => b.shortcut === network);
if (blockchain && !blockchain.connected && (!discoveryProcess || !discoveryProcess.completed)) {
dispatch({
type: DISCOVERY.WAITING_FOR_BLOCKCHAIN,
device,
network,
});
return;
}
if (!discoveryProcess) {
dispatch(begin(device, network));
} else if (discoveryProcess.completed && !ignoreCompleted) {
dispatch({
type: DISCOVERY.COMPLETE,
device,
network,
});
} else if (discoveryProcess.interrupted || discoveryProcess.waitingForDevice || discoveryProcess.waitingForBlockchain) {
// discovery cycle was interrupted
// start from beginning
dispatch(begin(device, network));
} else {
dispatch(discoverAccount(device, discoveryProcess));
}
};
// first iteration
// generate public key for this account
// start discovery process
const begin = (device: TrezorDevice, network: string): AsyncAction => async (dispatch: Dispatch, getState: GetState): Promise<void> => {
const { config } = getState().localStorage;
const networkData = config.networks.find(c => c.shortcut === network);
if (!networkData) return;
dispatch({
type: DISCOVERY.WAITING_FOR_DEVICE,
device,
network,
});
// get xpub from TREZOR
const response = await TrezorConnect.getPublicKey({
device: {
path: device.path,
instance: device.instance,
state: device.state,
},
path: networkData.bip44,
keepSession: true, // acquire and hold session
//useEmptyPassphrase: !device.instance,
useEmptyPassphrase: device.useEmptyPassphrase,
});
// handle TREZOR response error
if (!response.success) {
dispatch({
type: NOTIFICATION.ADD,
payload: {
type: 'error',
title: 'Discovery error',
message: response.payload.error,
cancelable: true,
actions: [
{
label: 'Try again',
callback: () => {
dispatch(start(device, network));
},
},
],
},
});
return;
}
// check for interruption
// corner case: DISCOVERY.START wasn't called yet, but Discovery exists in reducer created by DISCOVERY.WAITING_FOR_DEVICE action
// this is why we need to get process instance directly from reducer
const discoveryProcess = getState().discovery.find(d => d.deviceState === device.state && d.network === network);
if (dispatch(isProcessInterrupted(discoveryProcess))) return;
const basePath: Array<number> = response.payload.path;
// send data to reducer
dispatch({
type: DISCOVERY.START,
network,
device,
publicKey: response.payload.publicKey,
chainCode: response.payload.chainCode,
basePath,
});
// next iteration
dispatch(start(device, network));
};
const discoverAccount = (device: TrezorDevice, discoveryProcess: Discovery): AsyncAction => async (dispatch: Dispatch): Promise<void> => {
const { completed } = discoveryProcess;
const derivedKey = discoveryProcess.hdKey.derive(`m/${discoveryProcess.accountIndex}`);
const path = discoveryProcess.basePath.concat(discoveryProcess.accountIndex);
const publicAddress: string = EthereumjsUtil.publicToAddress(derivedKey.publicKey, true).toString('hex');
const ethAddress: string = EthereumjsUtil.toChecksumAddress(publicAddress);
const { network } = discoveryProcess;
// TODO: check if address was created before
try {
const account = await dispatch(BlockchainActions.discoverAccount(device, ethAddress, network));
// check for interruption
if (dispatch(isProcessInterrupted(discoveryProcess))) return;
// const accountIsEmpty = account.transactions <= 0 && account.nonce <= 0 && account.balance === '0';
const accountIsEmpty = account.nonce <= 0 && account.balance === '0';
if (!accountIsEmpty || (accountIsEmpty && completed) || (accountIsEmpty && discoveryProcess.accountIndex === 0)) {
dispatch({
type: ACCOUNT.CREATE,
payload: {
index: discoveryProcess.accountIndex,
loaded: true,
network,
deviceID: device.features ? device.features.device_id : '0',
deviceState: device.state || '0',
addressPath: path,
address: ethAddress,
balance: account.balance,
nonce: account.nonce,
block: account.block,
transactions: account.transactions,
},
});
}
if (accountIsEmpty) {
dispatch(finish(device, discoveryProcess));
} else if (!completed) {
dispatch(discoverAccount(device, discoveryProcess));
}
} catch (error) {
dispatch({
type: DISCOVERY.STOP,
device,
});
dispatch({
type: NOTIFICATION.ADD,
payload: {
type: 'error',
title: 'Account discovery error',
message: error.message,
cancelable: true,
actions: [
{
label: 'Try again',
callback: () => {
dispatch(start(device, discoveryProcess.network));
},
},
],
},
});
}
};
const finish = (device: TrezorDevice, discoveryProcess: Discovery): AsyncAction => async (dispatch: Dispatch): Promise<void> => {
await TrezorConnect.getFeatures({
device: {
path: device.path,
instance: device.instance,
state: device.state,
},
keepSession: false,
// useEmptyPassphrase: !device.instance,
useEmptyPassphrase: device.useEmptyPassphrase,
});
await dispatch(BlockchainActions.subscribe(discoveryProcess.network));
if (dispatch(isProcessInterrupted(discoveryProcess))) return;
dispatch({
type: DISCOVERY.COMPLETE,
device,
network: discoveryProcess.network,
});
};
export const reconnect = (network: string): PromiseAction<void> => async (dispatch: Dispatch): Promise<void> => {
await dispatch(BlockchainActions.subscribe(network));
dispatch(restore());
};
// Called after DEVICE.CONNECT ('trezor-connect') or CONNECT.AUTH_DEVICE actions in WalletService
// OR after BlockchainSubscribe in this.reconnect
export const restore = (): ThunkAction => (dispatch: Dispatch, getState: GetState): void => {
// check if current url has "network" parameter
const urlParams = getState().router.location.state;
if (!urlParams.network) return;
// make sure that "selectedDevice" exists
const selected = getState().wallet.selectedDevice;
if (!selected) return;
// find discovery process for requested network
const discoveryProcess: ?Discovery = getState().discovery.find(d => d.deviceState === selected.state && d.network === urlParams.network);
// if there was no process befor OR process was interrupted/waiting
const shouldStart = !discoveryProcess || (discoveryProcess.interrupted || discoveryProcess.waitingForDevice || discoveryProcess.waitingForBlockchain);
if (shouldStart) {
dispatch(start(selected, urlParams.network));
}
};
export const stop = (): ThunkAction => (dispatch: Dispatch, getState: GetState): void => {
const device: ?TrezorDevice = getState().wallet.selectedDevice;
if (!device) return;
// get all uncompleted discovery processes which assigned to selected device
const discoveryProcesses = getState().discovery.filter(d => d.deviceState === device.state && !d.completed);
if (discoveryProcesses.length > 0) {
dispatch({
type: DISCOVERY.STOP,
device,
});
}
};
export const addAccount = (): ThunkAction => (dispatch: Dispatch, getState: GetState): void => {
const selected = getState().wallet.selectedDevice;
if (!selected) return;
dispatch(start(selected, getState().router.location.state.network, true));
};