packages/extension/src/page.ts
// Copyright 2019-2024 @polkadot/extension authors & contributors
// SPDX-License-Identifier: Apache-2.0
import type { RequestSignatures, TransportRequestMessage } from '@polkadot/extension-base/background/types';
import type { Message } from '@polkadot/extension-base/types';
import { MESSAGE_ORIGIN_CONTENT } from '@polkadot/extension-base/defaults';
import { enable, handleResponse, redirectIfPhishing } from '@polkadot/extension-base/page';
import { injectExtension } from '@polkadot/extension-inject';
import { packageInfo } from './packageInfo.js';
function inject () {
injectExtension(enable, {
name: 'polkadot-js',
version: packageInfo.version
});
}
// setup a response listener (events created by the loader for extension responses)
window.addEventListener('message', ({ data, source }: Message): void => {
// only allow messages from our window, by the loader
if (source !== window || data.origin !== MESSAGE_ORIGIN_CONTENT) {
return;
}
if (data.id) {
handleResponse(data as TransportRequestMessage<keyof RequestSignatures>);
} else {
console.error('Missing id for response.');
}
});
redirectIfPhishing().then((gotRedirected) => {
if (!gotRedirected) {
inject();
}
}).catch((e) => {
console.warn(`Unable to determine if the site is in the phishing list: ${(e as Error).message}`);
inject();
});