Prediction Market Outcome Proposal Tool

WHAT IT DOES

This tool enables prediction market participants and administrators to propose outcomes for active markets. In prediction markets, outcomes represent the possible results of an event (e.g., "Yes/No", "Candidate A/B/C", or specific numerical values). Proposing outcomes allows the market to define the resolution criteria before trading begins. It connects to your wallet and reads the prediction market contract address, market ID, proposed outcome, proposal description, current outcomes list, voting status, proposal history, and timestamps. The tool signs and submits transactions to propose market outcomes, update outcome proposals, record proposal metadata, and emit proposal events.

HOW TO USE

1. Connect your wallet using the wallet bridge (supports MetaMask, WalletConnect, and other EVM-compatible wallets).

2. Select the target network that matches your prediction market contract deployment.

3. Enter the prediction market contract address and the market ID, then click "load contract" to initialize the connection.

4. Click "fetch market status" to retrieve the current outcomes list and voting status.

5. Review the current outcomes and voting status to understand what has already been proposed.

6. Enter the proposed outcome (e.g., "Yes", "Candidate A") and a detailed proposal description.

7. Click "validate proposal" to verify that the outcome is not a duplicate and the market is open for proposals.

8. Click "check proposal history" to view the complete history of proposals for this market.

9. Review the proposed outcome, description, and voting status before executing.

10. Click "propose outcome" to sign and submit the transaction that adds your proposed outcome to the market.

TECHNICAL MECHANISM

The tool uses ethers.js v5.7.2 to interact with any EVM-compatible prediction market contract that implements a standard interface (getOutcomes(uint256) view returns (bytes32[]), getVotingStatus(uint256) view returns (uint8), proposeOutcome(uint256, bytes32, string) external, getProposalHistory(uint256) view). The proposeOutcome function validates that the market is open for proposals, the outcome is not a duplicate, and the caller is authorized (e.g., market creator, oracle, or any participant depending on the market design). The outcome is stored as a bytes32 value, which can represent strings, numbers, or addresses. The contract typically emits a OutcomeProposed event when a new outcome is added. The getProposalHistory view returns an array of timestamps, outcomes, and descriptions, providing a complete audit trail of all proposals. Transaction handling follows EIP-1559 gas price calculations using receipt.effectiveGasPrice for accurate cost reporting. Proposal metadata is recorded both in the contract's history and locally for the user's reference.

WHAT IT CANNOT SEE

This tool operates purely on-chain and cannot verify off-chain outcome accuracy — it does not check whether the proposed outcome is factually correct, relevant to the event, or will be resolvable. It cannot validate outcome validity — the tool cannot confirm that the outcome is appropriate for the market or that it follows the market's resolution rules. It cannot detect manipulation — the tool cannot identify attempts to propose misleading, duplicate, or malicious outcomes. It cannot ensure fair resolution — the tool does not verify that the outcome will be resolved fairly or that the resolution process is unbiased. The tool also cannot verify that outcomes are correct — it relies on the market participants and oracle to determine the correct outcome.

PLEASE NOTE

This tool works exclusively with EVM-compatible blockchain networks (Ethereum, Polygon, Arbitrum, Optimism, Base, etc.). It requires the prediction market contract to implement the interface described above. All transactions incur gas fees paid by the connected wallet. The tool maintains no persistent storage — all state is refreshed from the blockchain on each session. Proposing outcomes is a critical step in market creation — ensure the outcome is clearly defined, unambiguous, and consistent with the event being predicted. Consider the market's rules and resolution criteria before proposing outcomes. Always test on a testnet first and verify that the outcome proposal is correctly recorded.