Optimism DAI Batch Sender

WHAT IT DOES

Optimism DAI Batch Sender enables efficient batch sending of DAI (MakerDAO stablecoin) tokens to multiple recipients in a single transaction on the Optimism network. Users provide a DAI token contract address (defaulting to the Optimism DAI address), a list of recipient addresses and amounts, and the tool constructs a batch transfer using the shared BotGentz sender contract. The tool reads the sender contract fee and owner details, calculates the total DAI to send, checks the user's ETH balance for gas and fees, and handles DAI approval (if needed). The batch is sent in one transaction, significantly reducing gas costs compared to sending each transfer individually on Optimism. This is ideal for airdrops, payroll, rewards distribution, and other multi-recipient DAI transfers on Optimism.

HOW TO USE

Enter the DAI token contract address (defaults to the Optimism DAI address: 0xDA10009cBd5D07dd0CeCc66161FC93D7c9000da1). Enter recipients one per line with format: "address, amount" (amount in DAI units). Click "Review" to see a summary of recipients, total DAI, sender contract fee, and contract details. The tool validates all inputs, checks the sender contract's fee and owner, and calculates the total cost. Review the details carefully, then click "Sign & send batch" to approve DAI spending (if needed) and execute the batch transfer. The tool handles the approval and batch send in sequence, displaying progress and final transaction confirmation.

TECHNICAL MECHANISM: BATCH SEND WITH APPROVAL AND FEE MANAGEMENT

The tool uses the shared BotGentz sender contract (address looked up from the BULKSEND registry by chain ID, using the erc20 standard). The contract's batchSendERC20 function accepts a token address, arrays of recipient addresses and amounts, and a fee amount. Before sending, the tool checks the fee via the contract's fee() method (read live, never hardcoded), displays the fee and owner address for transparency, and validates that the user has sufficient ETH to cover both the fee and gas. The tool then checks the user's DAI allowance for the sender contract; if insufficient, it prompts the user to approve the exact total amount (not unlimited). The batch send is executed with the fee amount included as a payable parameter. All transactions are signed and sent via the connected wallet on Optimism.

WHAT IT CANNOT SEE

Cannot actually execute the batch send without user approval and transaction signing—the user must confirm in their wallet. Cannot verify that recipients are valid or that the sender has sufficient DAI balance—balance checks are not performed on-chain before sending. Cannot guarantee that all transfers will succeed—some recipients may have issues (e.g., blacklisted addresses). Cannot detect if the DAI contract has paused transfers. Cannot account for gas price fluctuations during the batch execution. Cannot ensure that the sender has enough ETH for gas beyond the balance check. Cannot verify that the DAI token contract address is correct or active—the user provides it. Cannot detect if the recipient address is blacklisted or blocked by DAI. Cannot provide fallback if a transfer fails mid-batch—the batch sends atomically or reverts entirely. Cannot guarantee that the batch order will be preserved by the network—transactions are processed in order within the batch.

PLEASE NOTE

EVM chains only. This tool sends transactions on Optimism and requires a connected wallet with sufficient ETH for gas and fees. DAI uses 18 decimals. The sender contract charges a fee in ETH. Always review the fee and contract details before signing.