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createIdentityRequest,
extractSignaturesFromCallback,
isCallback,
LinkInfo,
setTransactionCallback,
waitForCallback,
} from '@wharfkit/protocol-esr'
import {ReceiveOptions} from '@greymass/buoy'
import {
AbstractWalletPlugin,
CallbackPayload,
Checksum256,
LoginContext,
PermissionLevel,
ResolvedSigningRequest,
TransactContext,
UserInterface,
WalletPlugin,
WalletPluginConfig,
WalletPluginLoginResponse,
WalletPluginMetadata,
WalletPluginSignResponse,
} from '@wharfkit/session'
import {PrivateKey, PublicKey, UInt64} from '@wharfkit/antelope'
import {sealMessage} from '@wharfkit/sealed-messages'
import WebSocket from 'isomorphic-ws'
import defaultTranslations from './translations'
export function openPopupWindow(url: string): Window | null {
const width = 450
const height = 750
const left = Math.round(window.screenX + (window.outerWidth - width) / 2)
const top = Math.round(window.screenY + (window.outerHeight - height) / 2)
return window.open(
url,
'web-authenticator',
`width=${width},height=${height},left=${left},top=${top}`
)
}
export function openWallet(url: string): Window | null {
return openPopupWindow(url)
}
interface WebAuthenticatorOptions {
/** The URLs for the web authenticator service, keyed by chain ID */
urls: Record<string, string>
/** The buoy service URL for messaging */
buoyServiceUrl?: string
/** The buoy WebSocket for messaging */
buoyWs?: WebSocket
}
export class WalletPluginWebAuthenticator extends AbstractWalletPlugin implements WalletPlugin {
private urls: Record<string, string>
private buoyServiceUrl: string
private buoyWs?: WebSocket
constructor(options: WebAuthenticatorOptions) {
super()
this.urls = options.urls
this.buoyServiceUrl = options.buoyServiceUrl || 'https://cb.anchor.link'
this.buoyWs = options?.buoyWs
}
/**
* The logic configuration for the wallet plugin.
*/
readonly config: WalletPluginConfig = {
// Allow chain selection since the web authenticator may support multiple chains
requiresChainSelect: false,
// Allow permission selection
requiresPermissionSelect: false,
// Currently only supports Jungle 4 and Vaulta:
supportedChains: [
'73e4385a2708e6d7048834fbc1079f2fabb17b3c125b146af438971e90716c4d',
'aca376f206b8fc25a6ed44dbdc66547c36c6c33e3a119ffbeaef943642f0e906',
],
}
/**
* The metadata for the wallet plugin to be displayed in the user interface.
*/
readonly metadata: WalletPluginMetadata = WalletPluginMetadata.from({
name: 'Web Authenticator',
description: 'Sign transactions using a web-based authenticator',
homepage: 'https://github.com/wharfkit/wallet-plugin-web-authenticator',
})
/**
* Unique identifier for this wallet plugin
*/
get id(): string {
return 'web-authenticator'
}
/**
* The translations for this plugin
*/
translations = defaultTranslations
getChainUrl(context: LoginContext | TransactContext): string {
// default to first
let url = this.urls[0]
// override if chain specified
if (context.chain) {
url = this.urls[String(context.chain.id)]
}
Iif (!url) {
throw new Error(
`No web authenticator URL configured for chain ID: ${context.chain?.id}`
)
}
return url
}
/**
* Opens a popup window with the given URL and waits for it to complete
*/
private async openPopup(
url: string,
receiveOptions: ReceiveOptions,
ui?: UserInterface
): Promise<{payload: CallbackPayload}> {
return new Promise((resolve, reject) => {
const t = ui?.getTranslate(this.id)
// Show status message using WharfKit UI
ui?.status('Opening wallet window...')
const popup = openPopupWindow(url)
Iif (!popup) {
return this.showManualPopupPrompt(url, receiveOptions, ui)
.then((response) => {
resolve(response)
})
.catch((error) => {
reject(error)
})
}
// Update status
ui?.prompt({
title: 'Approve',
body: 'Please approve the transaction in the wallet window.',
elements: [],
})
const checkClosedInterval = setInterval(() => {
Iif (popup?.closed) {
clearInterval(checkClosedInterval)
ui?.status('Transaction cancelled')
reject(new Error('Transaction cancelled by user'))
}
}, 1000)
waitForCallback(receiveOptions, this.buoyWs, t)
.then((response) => {
popup?.close()
ui?.status('Transaction approved successfully')
resolve({payload: response})
})
.catch(() => {
popup?.close()
ui?.status('Transaction cancelled')
reject(new Error('Transaction cancelled by user'))
})
.finally(() => {
clearInterval(checkClosedInterval)
})
})
}
/**
* Shows error prompt and handles retry logic
*/
private showManualPopupPrompt(
url: string,
receiveOptions: ReceiveOptions,
ui?: UserInterface
): Promise<{payload: CallbackPayload}> {
return new Promise((resolve, reject) => {
ui?.prompt({
title: 'Pop-up blocked',
body: `Pop-up blocked by your browser. Open the wallet window manually.`,
elements: [
{
type: 'button',
data: {
label: 'Open Wallet',
onClick: () => {
this.openPopup(url, receiveOptions, ui)
.then((response) => {
resolve(response)
})
.catch((error) => {
reject(error)
})
},
},
},
],
})
})
}
/**
* Performs login by opening the web authenticator in a popup
*/
async login(context: LoginContext): Promise<WalletPluginLoginResponse> {
try {
context.appName = context.appName || 'Unknown App'
// Create the identity request to be presented to the user
const {
callback: receiveOptions,
request,
requestKey,
privateKey,
} = await createIdentityRequest(context, this.buoyServiceUrl)
const url = this.getChainUrl(context)
const loginUrl = `${url}/sign?esr=${request.encode()}&chain=${
context.chain?.id
}&requestKey=${requestKey}`
const {payload}: {payload: CallbackPayload} = await this.openPopup(
loginUrl,
receiveOptions,
context.ui
)
this.data.encryptionKey = String(privateKey)
this.data.messageKey = payload.link_key
Iif (!payload.cid) {
throw new Error('Login failed: No chain ID returned')
}
// Prepare the basic login response
const loginResponse: WalletPluginLoginResponse = {
chain: Checksum256.from(payload.cid),
permissionLevel: PermissionLevel.from({
actor: payload.sa,
permission: payload.sp,
}),
}
// Store the identity request and signature for verification
// The 3rd party app can use this to verify the authentication
if (payload.sig) {
// Create identity proof object for third-party verification
Object.assign(loginResponse, {
identityProof: {
signature: payload.sig,
signedRequest: request.encode(),
},
})
}
return loginResponse
} catch (error: unknown) {
Iif (error instanceof Error) {
throw new Error(`Login failed: ${error.message}`)
}
throw new Error('Login failed: Unknown error')
}
}
/**
* Signs a transaction by opening the web authenticator in a popup
*/
async sign(
resolved: ResolvedSigningRequest,
context: TransactContext
): Promise<WalletPluginSignResponse> {
try {
// Ensure we have a request key from login
Iif (!this.data.encryptionKey || !this.data.messageKey) {
throw new Error('No request keys available - please login first')
}
const expiration = resolved.transaction.expiration.toDate()
// Create a new signing request based on the existing resolved request
const modifiedRequest = await context.createRequest({transaction: resolved.transaction})
// Set the expiration on the request LinkInfo
modifiedRequest.setInfoKey(
'link',
LinkInfo.from({
expiration,
})
)
// Add the callback to the request
const callback = setTransactionCallback(modifiedRequest, this.buoyServiceUrl)
// Seal the request using the shared secret
const nonce = UInt64.from(Math.floor(Math.random() * Number.MAX_SAFE_INTEGER))
const sealedRequest = await sealMessage(
modifiedRequest.encode(),
PrivateKey.from(this.data.encryptionKey),
PublicKey.from(this.data.messageKey),
nonce
)
const url = this.getChainUrl(context)
const signUrl = `${url}/sign?sealed=${sealedRequest.toString(
'hex'
)}&nonce=${nonce.toString()}&chain=${context.chain?.id}&accountName=${
context.accountName
}&permissionName=${context.permissionName}&appName=${
context.appName
}&requestKey=${String(PrivateKey.from(this.data.encryptionKey).toPublic())}`
const response = await this.openPopup(signUrl, callback, context.ui)
const signatures = extractSignaturesFromCallback(response.payload)
const wasSuccessful = isCallback(response.payload) && signatures.length > 0
if (wasSuccessful) {
// Return the signatures from the wallet
return {
signatures: extractSignaturesFromCallback(response.payload),
resolved: resolved, // Return the original resolved request for testing
}
} else E{
throw new Error('Signing failed: No signatures returned')
}
} catch (error: unknown) {
Iif (error instanceof Error) {
throw new Error(`Signing failed: ${error.message}`)
}
throw new Error('Signing failed: Unknown error')
}
}
}
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