Approval-and-Stake Combo Executor

WHAT IT DOES

Approval-and-Stake Combo Executor lets you approve a token and deposit it into a staking contract in one atomic batched transaction. Instead of submitting two separate transactions—first an approve() to grant the staking contract permission, then the stake/deposit call—the tool bundles both into a single multicall transaction. This saves gas, reduces wallet signing steps, and eliminates the risk of the staking call failing because the approval wasn't submitted or confirmed in time. You can specify the staking function name (e.g., deposit, stake, enter) to match the contract you're using.

HOW TO USE

Connect your EVM wallet and select the network. Enter the staking contract address, the token address you want to stake, the amount in wei, and the name of the staking function (default is "deposit"). Click "Check balance & allowance" to verify your balance and whether an approval is needed. Review the status, then click "Execute combo (approve + stake)". The tool checks your balance and current allowance, then builds a batch containing an approve() call (if needed) and the staking function call. The entire batch is submitted via multicall and confirmed in one transaction.

TECHNICAL MECHANISM

The tool uses Multicall3 to aggregate multiple contract calls into a single transaction. It first checks the token balance and current allowance for the staking contract. If the allowance is less than the amount to stake, it encodes an approve(spender, amount) call for the token. It then encodes the staking function call—using the user-specified function name—with the amount as the argument. Both calls are packaged into an aggregate3() call and submitted. The tool uses receipt.effectiveGasPrice for accurate gas reporting and provides progress feedback during execution. The staking function must accept a uint256 amount parameter and be callable by the user.

WHAT IT CANNOT SEE

This tool cannot handle staking that requires multiple approval steps, non-standard approval patterns (e.g., permit, or tokens that return false instead of reverting), or staking functions that require additional parameters beyond the amount. It relies on the staking contract supporting a standard deposit/stake function and on the multicall contract being deployed at the standard address. The tool does not detect or handle tokens with non-standard approve() behavior. It also cannot guarantee staking rewards, APY, or the security of the staking contract itself. The tool does not support native token staking (ETH/BNB) directly—only ERC-20 to staking contract interactions.

PLEASE NOTE

The combo transaction requires sufficient native tokens (ETH, BNB, MATIC, etc.) to cover gas fees. The multicall contract address used is the standard Multicall3 address—ensure it is deployed on your chosen network. Always verify the staking contract address and function name before executing. This tool is for EVM chains only and does not support non-EVM networks.