Prediction Market Winner Batch Payout Tool (Ethereum L1)

WHAT IT DOES

This tool enables prediction market operators, oracle providers, and platform administrators to distribute winnings to market winners in a single batched transaction on Ethereum L1. Instead of sending 50 individual transactions and paying gas 50 times, you paste a list of winner addresses and payout 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 payout 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 prediction market payouts—covering election markets, sports betting, crypto price predictions, event outcomes, and any market where users wager on future events—but it works for any bulk payment need. Whether you run a decentralized prediction market platform or manage a single market's resolution, this tool simplifies winner distributions.

HOW TO USE

Connect your EVM wallet via the BotGentz bridge. The tool automatically detects Ethereum L1 (chain ID 1) 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 winner list as one address and payout amount per line. Click "Parse list" to validate addresses and preview the total payout. The review panel shows the number of winners, total payout, 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 markets with hundreds of winners, 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 payout. 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 winners receive unique digital assets or collectible rewards. The batch size is limited only by block gas limits, suitable for markets with hundreds of participants.

WHAT IT CANNOT SEE

This tool cannot verify off-chain prediction outcomes, market resolution events, or winner eligibility. It cannot prove that recipient addresses are correct, that winners are legitimate, or that the same person is not receiving multiple payouts via different identities. It cannot detect Sybil attacks or duplicate participant identities. It cannot access private winner payment preferences, market rules, or oracle data. 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 payout list. It does not store any data; all state is in-memory and lost on reload. It cannot verify that market resolution was accurate, that oracles reported correctly, or that the market wasn't manipulated. It cannot enforce payout multipliers, handle partial wins, or manage multiple outcome scenarios. It cannot automatically import winner lists from prediction market platforms or calculate payouts based on complex resolution logic. It cannot verify that winners actually held winning shares, that they didn't use insider information, or that they are eligible based on jurisdictional requirements. It cannot refund losing participants or handle disputed outcomes.

PLEASE NOTE

This tool works only on Ethereum L1 (chain ID 1) with the BotGentz bulk-sender contract deployed. Other EVM chains like Optimism, Arbitrum, Base, Polygon, BNB Chain, and others are supported by sibling tools—this specific tool is restricted to Ethereum mainnet. 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, payout amounts, and winner eligibility before signing any transaction. For prediction markets with large payout pools, consider testing with a small batch first and using a multi-signature wallet for added security.