Ethereum L1 WBTC Batch Sender

WHAT IT DOES

This tool enables the batch distribution of WBTC (Wrapped Bitcoin) to multiple recipient addresses in a single atomic transaction on Ethereum L1. It connects to your wallet via BGWallet, reads the WBTC contract bytecode and verified source, fetches your current balance and allowance, and constructs a batched transfer that sends tokens to each address with specified amounts. The batch is executed through the trusted BotGentz sender contract, ensuring all recipients receive their tokens simultaneously or the entire transaction reverts. This is ideal for airdrops, salary payouts, dividend distributions, or any scenario requiring efficient multi-recipient token transfers.

HOW TO USE

1. Connect your wallet using the "Connect" button (BGWallet integration).

2. Ensure you are on Ethereum Mainnet (chain ID 1) — the tool will prompt you to switch if needed.

3. Enter the WBTC contract address (defaults to the official 0x2260FAC5...).

4. Paste your recipient list — one address and amount per line, separated by space or comma (e.g., "0xabc... 0.01").

5. Click "Parse & preview" to validate addresses and see a summary table.

6. Review the sender information: your address, WBTC balance, required total (including network fee), current allowance, and the batch sender contract details.

7. If allowance is insufficient, click "Approve" to authorize the sender contract to spend your WBTC.

8. Click "Send batch" to execute the atomic transfer. The progress bar will show transaction status.

TECHNICAL MECHANISM

The tool leverages the BotGentz multisender contract (BULKSEND registry) which implements a batched ERC-20 transfer function. It dynamically fetches the current fee and owner address from the contract (never hardcoding stale values). The approval process grants exactly the required total amount — not an unlimited allowance — enhancing security. The contract uses the `sendERC20` method, which takes an array of recipient addresses and corresponding amounts, processes them in a loop, and ensures all transfers succeed before finalizing. The transaction includes the protocol fee as `msg.value`. The tool reads the WBTC contract decimals (8, unlike most ERC-20s) and formats amounts accordingly, preventing precision errors. It also validates total required funds (sum of all transfers + fee) against the sender's balance before submission, catching underfunding early.

WHAT IT CANNOT SEE

This tool cannot guarantee the recipient addresses are valid beyond basic Ethereum address format validation (0x + 40 hex characters). It does not verify if recipients are contracts, if they can receive WBTC, or if they have been blacklisted by the WBTC contract (which has built-in blacklisting functionality). The tool cannot recover from a failed batch — due to the atomic nature of the transaction, if any single transfer fails (e.g., blacklisted recipient, insufficient gas, contract revert), the entire batch reverts and no tokens are sent to anyone. It cannot send to zero addresses, to the sender's own address, or exceed the block gas limit (which limits batch size). The tool does not simulate the transaction beforehand, so unexpected reverts may occur during execution. It relies entirely on the WBTC contract behaving as expected — any changes to the WBTC contract's logic (e.g., upgrades, pausing, blacklist updates) could cause the batch to fail.

PLEASE NOTE

This tool is designed exclusively for Ethereum L1 (mainnet). It reads the chain ID and uses the BULKSEND registry to locate the appropriate sender contract, but only chain IDs present in the registry are supported (including mainnet, optimism, arbitrum, polygon, and others). For Ethereum L1 WBTC specifically, the registry address is 0xE0F4E170C434071b167ABA0e64DC3689536f2E07. The sender contract charges a fee in ETH (native gas token), which is displayed before signing. Always review the fee, contract address, and owner before approving or sending. This tool is provided as-is — verify all transactions carefully, especially when dealing with high-value assets like WBTC.