Crowdfunding Backer Reward Batch Distributor (Base)

WHAT IT DOES

This tool enables crowdfunding campaign creators, project founders, and platform operators to distribute rewards to backers in a single batched transaction on Base. Instead of sending 50 individual transactions and paying gas 50 times, you paste a list of backer addresses and reward amounts, and the BotGentz bulk-sender contract distributes everything in one go. It supports ERC-20 tokens, ERC-721 NFTs, and ERC-1155 multi-tokens, plus native ETH through the same interface. The tool reads on-chain balances, verifies that your wallet holds enough of each asset to cover the total rewards plus the contract's fee, and checks your transaction history to flag duplicates. It displays the contract's live fee, owner, and address before you sign anything so you know exactly what you are approving. This is designed specifically for crowdfunding reward distributions—covering Kickstarter-style campaigns, Gitcoin grants, community fundraising, NFT project crowdfunding, and token sale rewards—but it works for any bulk payment need. Whether you run a small indie project or a large-scale crowdfunding platform, this tool simplifies reward fulfillment.

HOW TO USE

Connect your EVM wallet via the BotGentz bridge. The tool automatically detects Base (chain ID 8453) and looks up the correct bulk-sender contract from the BotGentz registry. Enter the token contract address, choose the token type (ERC-20, ERC-721, or ERC-1155), and paste your backer list as one address and reward amount per line. Click "Parse list" to validate addresses and preview the total rewards. The review panel shows the number of backers, total rewards, token address, and the contract fee in ETH. When you click "Send batch," the tool performs a balance check per sender, not per row, ensuring the entire batch can complete before the first transfer. It then approves the sender contract for the exact total amount, not unlimited, and sends the batched transaction. Progress is shown throughout, including transaction confirmation. All state is in-memory and lost on reload—no data is stored. The tool handles campaigns with multiple reward tiers, varying amounts, and NFT rewards, making mass payouts practical and efficient.

BULK SENDER CONTRACT MECHANISM

Unlike claim-based airdrops where each recipient pays their own gas to withdraw, this is a true bulk-send tool: the sender pays once for the entire batch. The BotGentz registry provides per-chain, per-standard contract addresses. The tool reads the fee() and owner() methods live from the contract each time—never hardcoding fees because the owner can change them. It uses the contract's sendERC20, sendERC721, and sendERC1155 methods, passing the recipient arrays, amounts or token IDs, and the required fee as msg.value. The fee covers the contract's operational costs and is separate from network gas. The tool checks balances comprehensively: native ETH balance must cover the fee, and ERC-20 balance must cover the total rewards. It walks through approvals sequentially and awaits each transaction, avoiding nonce conflicts that would occur if sends were fired concurrently. Post-EIP-1559, it uses receipt.effectiveGasPrice for accurate cost reporting rather than tx.gasPrice. For chains with different log limits, it chunks reads appropriately, halving ranges on failure. The contract owner is shown so you can verify the deployer before signing. The tool also reads token decimals dynamically to handle tokens with different precision correctly, and supports NFT distributions where backers receive unique digital collectibles, exclusive access tokens, or tier-specific rewards. The batch size is limited only by block gas limits, suitable for campaigns with hundreds of backers across multiple reward tiers.

WHAT IT CANNOT SEE

This tool cannot verify off-chain backer contribution amounts, campaign eligibility, or reward tier qualifications. It cannot prove that recipient addresses are correct, that backers are legitimate, or that the same person is not receiving multiple rewards via different identities. It cannot detect Sybil attacks or duplicate backer identities. It cannot access private backer payment preferences, campaign rules, or contribution history. It cannot recover funds sent to wrong addresses—the blockchain is final. It cannot see past the current block, and it cannot enforce business rules beyond what is expressed in the reward list. It does not store any data; all state is in-memory and lost on reload. It cannot verify that backers actually contributed the required amounts, that they qualified for specific reward tiers, or that they are eligible based on geographic restrictions. It cannot enforce campaign deadlines, handle refunds for unsuccessful campaigns, or manage multi-phase reward distributions beyond what you manually enter. It cannot automatically import backer lists from crowdfunding platforms or calculate rewards based on contribution levels. It cannot verify that rewards are being distributed to the correct addresses, that backers didn't use multiple wallets to exceed contribution limits, or that they are in good standing with the campaign. It cannot handle situations where a backer changes their address or where rewards need to be adjusted after distribution.

PLEASE NOTE

This tool works only on Base (chain ID 8453) with the BotGentz bulk-sender contract deployed. Other EVM chains like Ethereum, Optimism, Arbitrum, Polygon, BNB Chain, and others are supported by sibling tools—this specific tool is restricted to Base. Solana, Tron, Starknet, SUI, TON, Aptos, Bitcoin, Cosmos, and XRP are not supported. Always double-check the contract address displayed in the tool against the official BotGentz registry before sending. The tool is free and open-source; the contract fee is set by the owner and displayed live. Use at your own risk—you are responsible for verifying all addresses, reward amounts, and backer eligibility before signing any transaction. For campaigns with significant reward pools, consider using a multi-signature wallet or implementing a community review process before distributing rewards to ensure the campaign was successful and backers received what they were promised.