How to interact with preprocessed wallet v2

Community implementation

This wallet is a community-created implementation. Use at your own risk. Always test thoroughly on testnet before using with real funds.

Funds at risk

This guide sends real TON. Test on testnet first. Double-check recipient addresses — blockchain transactions cannot be reversed.

This guide shows how to deploy Preprocessed Wallet V2 and send transfers.

For technical details, see Preprocessed Wallet V2 specification.

Objective

By the end of this guide, you will:

Create a Preprocessed Wallet V2 instance from scratch
Deploy the wallet on-chain
Send single and batch transfers

Prerequisites

Node.js 18+ or TypeScript environment
@ton/ton, @ton/core, @ton/crypto packages installed
Preprocessed Wallet V2 wrapper and compiled contract code

This guide uses TypeScript with the official wrapper. The same logic applies to other SDKs (Go/Python): generate or load a mnemonic, derive a keypair, and calculate the address.

Step 1: Set up dependencies

Install required packages:

npm install @ton/ton @ton/core @ton/crypto

Copy the wrapper and contract code from the official repository:

# Clone the repository or download this file:
# - typescript/wrappers/PreprocessedWalletV2.ts

Why copy wrappers?

The official @ton/ton SDK does not include Preprocessed Wallet V2 wrappers yet. Copy PreprocessedWalletV2.ts from the repository until SDK support is added.

Step 2: Generate or load a mnemonic

A mnemonic is your wallet's master secret. It derives the private key used to sign all transactions.

Generate a new mnemonic

import { mnemonicNew } from '@ton/crypto';

const mnemonic = await mnemonicNew(24); // Array of 24 words

Load an existing mnemonic

const mnemonic = 'word1 word2 word3 ... word24'.split(' ');

Protect your mnemonic

Anyone with access to your mnemonic can control your wallet and all funds. Store it securely (password manager, hardware wallet, encrypted storage). Never commit it to version control.

Step 3: Derive the keypair

Convert the mnemonic to an Ed25519 keypair:

import { mnemonicToPrivateKey } from '@ton/crypto';

const keyPair = await mnemonicToPrivateKey(mnemonic);
// keyPair.publicKey  — used in contract state
// keyPair.secretKey  — used to sign external messages

Step 4: Create the wallet instance

Create a Preprocessed Wallet V2 contract instance:

import { TonClient } from '@ton/ton';
import { Cell } from '@ton/core';
import { Wallet, walletCode } from './wrappers/PreprocessedWalletV2';

// Compiled contract code (BoC)
const CODE = walletCode; // Already included in the wrapper

const client = new TonClient({
    endpoint: 'https://testnet.toncenter.com/api/v2/jsonRPC', // This is TESTNET endpoint
    // apiKey: 'your-api-key' // Optional: get from @tonapibot or @tontestnetapibot
});

const wallet = client.open(
    Wallet.createFromPublicKey(keyPair.publicKey)
);

Step 5: Get the wallet address

Calculate the wallet's address:

// Get non-bounceable address for funding
const address = wallet.address.toString({ bounceable: false, testOnly: true });
console.log('Wallet address:', address);
// Example (truncated): 0Q... (non-bounceable, testnet)

This address is deterministic: it depends only on CODE and publicKey. The same parameters always produce the same address.

Why non-bounceable?

When funding a nonexist account, use the non-bounceable format to prevent funds from bouncing back if the account doesn't exist yet. See Address formats for details.

Account status: nonexist

The calculated address exists only as a deterministic value. No account exists on the blockchain yet — no balance, no code, no data.

Step 6: Fund the wallet

Funds at risk

You will send TON to this address. Test on testnet first. Verify the wallet address carefully — blockchain transactions cannot be reversed.

Required before deployment: Send TON to your wallet address (from Step 5) to prepare it for deployment.

External messages (which deploy the wallet) require gas to execute. By funding the address, you transition the account from nonexist to uninit status and provide the balance needed for deployment. See Account statuses for details on how account states work.

Send TON using a faucet (testnet) or from another wallet (mainnet). After funding, the account transitions to uninit status — it has a balance and can accept external messages, but no code or data yet.

Step 7: Send messages

Automatic deployment

The wallet will auto-deploy on the first external message. No separate deployment step is needed.

Send single transfers

import { Address, toNano } from '@ton/ton';
import { beginCell } from '@ton/core';

// Get current sequence number
const currentSeqno = Number(await wallet.getSeqno());

// Send a single transfer
await wallet.sendTransfers(keyPair, [{
    to: Address.parse('EQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAM9c'), // Zero address for testing
    value: toNano('0.01'),
    bounce: false
}], currentSeqno);

console.log('Transfer sent');

Send batch transfers

import { Address, toNano, comment } from '@ton/ton';

// Get current sequence number
const currentSeqno = Number(await wallet.getSeqno());

// Create multiple transfers with similar structure
const transfers = [];
for (let i = 0; i < 5; i++) {
    transfers.push({
        to: Address.parse('EQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAM9c'),
        value: toNano('0.01'),
        body: comment(`#${i}`)
    });
}

// Send batch transfers
await wallet.sendTransfers(keyPair, transfers, currentSeqno);

console.log('Batch transfers sent');

Maximum actions

reprocessed Wallet V2 supports up to 255 actions per transaction. This is the maximum number of out actions supported by TON blockchain.

How to interact with preprocessed wallet v2

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