Add support for MathWallet extension

src/utils/wallet.tsx

@@ -16,6 +16,7 @@ import {
   LedgerWalletAdapter,
   SolongWalletAdapter,
   PhantomWalletAdapter,
+  MathWalletAdapter,
 } from '../wallet-adapters';
 
 const ASSET_URL =
@@ -44,6 +45,12 @@ export const WALLET_PROVIDERS = [
     icon: `https://www.phantom.app/img/logo.png`,
     adapter: PhantomWalletAdapter,
   },
+  {
+    name: 'MathWallet',
+    url: 'https://www.mathwallet.org',
+    icon: `${ASSET_URL}/mathwallet.svg`,
+    adapter: MathWalletAdapter,
+  }
 ];
 
 const WalletContext = React.createContext<null | WalletContextValues>(null);

src/wallet-adapters/index.tsx

@@ -1,4 +1,5 @@
 export * from './ledger';
 export * from './solong';
 export * from './phantom';
+export * from './math';
 export * from './types';

src/wallet-adapters/math/index.tsx

@@ -0,0 +1,91 @@
+import EventEmitter from 'eventemitter3';
+import { PublicKey, Transaction } from '@solana/web3.js';
+import { notify } from '../../utils/notifications';
+import { DEFAULT_PUBLIC_KEY, WalletAdapter } from '../types';
+
+export class MathWalletAdapter extends EventEmitter implements WalletAdapter {
+  _publicKey?: PublicKey;
+  _onProcess: boolean;
+  _connected: boolean;
+  constructor() {
+    super();
+    this._onProcess = false;
+    this._connected = false;
+    this.connect = this.connect.bind(this);
+  }
+
+  get connected() {
+    return this._connected;
+  }
+
+  get autoApprove() {
+    return false;
+  }
+
+  public async signAllTransactions(
+    transactions: Transaction[],
+  ): Promise<Transaction[]> {
+    if (!this._provider) {
+      return transactions;
+    }
+
+    return this._provider.signAllTransactions(transactions);
+  }
+
+  private get _provider() {
+    if ((window as any)?.solana?.isMathWallet) {
+      return (window as any).solana;
+    }
+    return undefined;
+  }
+
+  get publicKey() {
+    return this._publicKey || DEFAULT_PUBLIC_KEY;
+  }
+
+  async signTransaction(transaction: Transaction) {
+    if (!this._provider) {
+      return transaction;
+    }
+
+    return this._provider.signTransaction(transaction);
+  }
+
+  connect() {
+    if (this._onProcess) {
+      return;
+    }
+
+    if (!this._provider) {
+      window.open('https://mathwallet.org/', '_blank');
+      notify({
+        message: 'Math Wallet Error',
+        description: 'Please install mathwallet',
+      });
+      return;
+    }
+
+    this._onProcess = true;
+    this._provider
+      .getAccount()
+      .then((account: any) => {
+        this._publicKey = new PublicKey(account);
+        this._connected = true;
+        this.emit('connect', this._publicKey);
+      })
+      .catch(() => {
+        this.disconnect();
+      })
+      .finally(() => {
+        this._onProcess = false;
+      });
+  }
+
+  disconnect() {
+    if (this._publicKey) {
+      this._publicKey = undefined;
+      this._connected = false;
+      this.emit('disconnect');
+    }
+  }
+}