Batch transferring tokens efficiently on the Binance Smart Chain (BSC) can streamline your operations, whether you're managing airdrops, payroll, or community rewards. This guide provides a clear, secure walkthrough for executing bulk transactions using a dedicated tool and smart contract.
Proper preparation is essential for both security and success. You will need a dedicated wallet with sufficient BNB to cover all gas fees for the transfers. This wallet should not store any other assets, as the process involves submitting private keys to the batch transfer tool. The tool used in this tutorial supports sending to up to 30 different wallet addresses in a single operation.
Preparing for Your Batch Transfer
Before initiating any transactions, you must complete a few critical setup steps to ensure everything runs smoothly.
- Use a Dedicated Wallet: Create a new wallet used solely for the purpose of batch transfers. Since the process requires submitting a private key to the tool, this wallet should never hold any funds other than the BNB needed for gas.
- Fund with BNB: Ensure this dedicated wallet has enough BNB to pay for the cumulative gas fees of all the transactions in the batch.
- Prepare Your Data: Compile the list of recipient addresses and the exact token amounts for each transfer. Double-check these details for accuracy.
Step-by-Step Batch Transfer Process
Follow these steps carefully to authorize and execute your batch transfer.
1. Authorize the Token Transfer Amount
The first step is to authorize the smart contract to spend a specific amount of tokens from your wallet.
- Input Parameters: In the batch transfer tool, you will need to enter the authorization amount.
- Crucial Note on Decimals: The authorization quantity must be provided in the token's smallest unit (its base value, accounting for decimals). For example, to authorize 100 tokens with 9 decimal places, you must input
100000000000(100 followed by 9 zeros).
After confirming the authorization, a transaction hash will be generated.
2. Verify the Authorization on the Blockchain Explorer
Always verify that the authorization was successful on a BSC blockchain explorer like BscScan.
- Check the Hash: Copy the transaction hash from the tool and paste it into the explorer.
- Confirm Success: The explorer will display the transaction status. Look for a "Success" confirmation to proceed.
3. Execute the Batch Transfer
Once authorized, you can now initiate the actual batch transfer to multiple addresses.
- Enter Transfer Details: Input the list of recipient addresses and their corresponding token amounts.
- Remember Decimals: Just like the authorization step, the transfer quantity for each recipient must be in the token's smallest unit.
- Stay Within Limits: The total sum of all transfers in the batch must not exceed the amount you authorized in Step 1. If it does, the entire batch will fail.
4. Confirm the Transfer on the Blockchain Explorer
After executing the batch, another transaction hash will be provided. Use the blockchain explorer again to verify the results.
- Validate Success: The explorer will show the status of the bulk transaction. A successful result means the tokens have been sent to all recipients.
- Individual Verification: You can also check one or more of the recipient wallets to confirm they received the correct amount of tokens.
Understanding the Smart Contract Code
The core functionality of a batch transfer tool is powered by a smart contract. Below is a simplified example of such a contract, which handles both native coin (BNB) and token transfers.
pragma solidity ^0.4.23;
import './Erc20.sol';
import './SafeMath.sol';
contract BatchTransferContract {
using SafeMath for uint256;
address owner;
event EtherTransfer(address from, uint256 value);
event TokenTransfer(address from, uint256 value, address token);
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
constructor() public {
owner = msg.sender;
}
function sendToken(address token, address[] recipients, uint256[] values) public payable {
uint256 total = 0;
ERC20 erc20 = ERC20(token);
for (uint256 i = 0; i < recipients.length; i++) {
erc20.transferFrom(msg.sender, recipients[i], values[i]);
total += values[i];
}
emit TokenTransfer(msg.sender, total, token);
}
function claimToken(address token) public onlyOwner {
ERC20 erc20 = ERC20(token);
uint256 balance = erc20.balanceOf(this);
erc20.transfer(owner, balance);
}
}This contract uses the transferFrom function, which requires a prior authorization (allowance) from the token owner, matching the process outlined in the steps above. 👉 Explore more strategies for efficient blockchain operations
Frequently Asked Questions
What is the maximum number of addresses I can send to in one batch?
Most tools, including the one referenced here, have an upper limit per transaction. This guide specifies a limit of 30 recipient addresses in a single batch operation. Always check the limits of your specific tool before preparing your list.
Why do I need to authorize tokens before transferring?
Authorization is a critical security feature of the ERC-20 and BEP-20 token standards. It allows a smart contract to spend a specific amount of tokens from your wallet on your behalf. This prevents contracts from moving your funds arbitrarily without your explicit permission.
What happens if my total transfer amount exceeds the authorized amount?
The entire batch transfer transaction will fail and be reverted on the blockchain. You will still pay the gas fee for the attempted transaction, but no tokens will be transferred. You must initiate a new authorization for a higher amount and try again.
Is it safe to input my private key into a batch transfer tool?
This is why using a dedicated wallet is non-negotiable. The wallet used for批量转账 should be empty except for the gas BNB and the tokens to be transferred immediately. Never use a primary wallet that holds a significant portion of your assets.
How do I calculate the correct amount including decimals?
You must multiply the desired token amount by 10 raised to the power of the token's decimal places. For a token with 9 decimals, 100 tokens would be 100 * 10^9 = 100,000,000,000 units. Your token's contract details will list its decimal precision.
Can I batch transfer BNB instead of tokens?
Yes, the same principle applies. The provided smart contract example includes a sendEther function for transferring the native coin (BNB on BSC). The process is similar but does not require a prior authorization step since you are sending the native currency directly.