feat: add tg wallet to the list of known wallets in demo backend

apps/demo-dapp-with-react-ui/src/server/wrappers/wallet-contract-tg.ts

@@ -0,0 +1,28 @@
+import { beginCell, Cell, contractAddress } from '@ton/ton';
+import { Buffer } from 'buffer';
+
+// Per-account "trampoline" of the Telegram wallet (WalletTg): the only code deployed
+// for each account. The actual WalletTg bytecode lives in the network config
+// (param -123), and the trampoline jumps into it, so the state init code below
+// never changes across WalletTg revisions.
+const walletTgTrampolineCode = 'te6cckEBAQEAGgAAMP8AIJgh10mDCLnyQN+Ahfgz0O0eIO1T2WlCfjk=';
+
+// 0xXX prefix of the current WalletTg storage layout (bumped on each contract revision).
+const walletTgStorageRevision = 0x00;
+
+export const WALLET_TG_SUBWALLET_ID_MAINNET = 0x7fff7f11;
+export const WALLET_TG_SUBWALLET_ID_TESTNET = 0x7fff7ffd;
+
+export class WalletContractTg {
+    static create(args: { workchain: number; publicKey: Buffer; walletId?: number | null }) {
+        const code = Cell.fromBase64(walletTgTrampolineCode);
+        const data = beginCell()
+            .storeUint(walletTgStorageRevision, 8)
+            .storeUint(0, 32) // seqno
+            .storeUint(args.walletId ?? WALLET_TG_SUBWALLET_ID_MAINNET, 32)
+            .storeBuffer(args.publicKey, 32)
+            .endCell();
+        const init = { code, data };
+        return { init, address: contractAddress(args.workchain, init) };
+    }
+}

apps/demo-dapp-with-react-ui/src/server/wrappers/wallets-data.ts

@@ -14,6 +14,7 @@ import {
 } from '@ton/ton';
 import { Buffer } from 'buffer';
 import { WalletContractV4R1 } from './wallet-contract-v4-r1';
+import { WalletContractTg } from './wallet-contract-tg';
 
 const knownWallets = [
     { contract: WalletContractV1R1, loadData: loadWalletV1Data },
@@ -26,7 +27,8 @@ const knownWallets = [
     { contract: WalletContractV4R1, loadData: loadWalletV4Data },
     { contract: WalletContractV4R2, loadData: loadWalletV4Data },
     { contract: WalletContractV5Beta, loadData: loadWalletV5BetaData },
-    { contract: WalletContractV5R1, loadData: loadWalletV5Data }
+    { contract: WalletContractV5R1, loadData: loadWalletV5Data },
+    { contract: WalletContractTg, loadData: loadWalletTgData }
 ].map(({ contract, loadData }) => ({
     contract: contract,
     loadData: loadData,
@@ -78,6 +80,16 @@ function loadWalletV5Data(cs: Slice) {
     return { isSignatureAuthAllowed, seqno, publicKey, walletId, plugins };
 }
 
+function loadWalletTgData(cs: Slice) {
+    // A future WalletTg revision may append fields after publicKey, so the
+    // remainder of the cell is intentionally left unread.
+    const storageRevision = cs.loadUint(8);
+    const seqno = cs.loadUint(32);
+    const walletId = cs.loadUint(32);
+    const publicKey = cs.loadBuffer(32);
+    return { storageRevision, seqno, walletId, publicKey };
+}
+
 export function tryParsePublicKey(stateInit: StateInit): Buffer | null {
     if (!stateInit.code || !stateInit.data) {
         return null;