Scalar Market Position Opener

WHAT IT DOES

This tool enables DeFi traders and prediction market participants to open positions in scalar markets. Scalar markets allow users to bet on a numeric outcome within a defined range (lower and upper bounds). Users can take long positions (betting the price will increase) or short positions (betting the price will decrease), depositing collateral that determines their exposure and potential payout. It connects to your wallet and reads the scalar market contract address, market ID, lower bound, upper bound, position value, collateral amount, current price, position type (long/short), position history, and timestamps. The tool signs and submits transactions to open scalar market positions, deposit collateral, set position bounds, record position metadata, and emit position 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 scalar market contract deployment.

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

4. Click "fetch market data" to retrieve the current price and position history.

5. Review the current price to understand the market's current value.

6. Set the lower bound and upper bound for your position — these define the range within which your position will be active.

7. Enter the collateral amount you want to deposit (in native token).

8. Select the position type — long (betting the price will increase) or short (betting the price will decrease).

9. Click "validate position" to verify that the bounds are valid, the collateral is positive, and the current price is within the bounds.

10. Click "open position" to sign and submit the transaction that opens your position in the scalar market.

TECHNICAL MECHANISM

The tool uses ethers.js v5.7.2 to interact with any EVM-compatible scalar market contract that implements a standard interface (getCurrentPrice(uint256) view returns (uint256), openPosition(uint256, uint256, uint256, uint256, bool) external payable, getPositionHistory(address, uint256) view). The openPosition function accepts the market ID, lower bound, upper bound, collateral amount, and a boolean indicating whether the position is long or short. The function validates that the bounds are within the market's allowed range, the collateral is sufficient, and the current price is within the bounds (or will be when the position is opened). The collateral is locked in the contract and used to determine the position's value and potential payout. The contract typically emits a PositionOpened event when a position is successfully opened. The getPositionHistory view provides a full audit trail of positions for each user and market. Transaction handling follows EIP-1559 gas price calculations using receipt.effectiveGasPrice for accurate cost reporting. Position 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 price accuracy — it does not check whether the current price is accurate or based on reliable data sources. It cannot validate market bounds — the tool cannot confirm that the bounds are appropriate for the market or that they reflect realistic outcomes. It cannot detect manipulation — the tool cannot identify attempts to manipulate the market price or position outcomes. It cannot ensure price feeds are correct — the tool relies on the contract's price feed and does not independently verify the price data. The tool also cannot verify that positions are profitable — it does not provide guidance on whether the position is likely to be profitable or not.

PLEASE NOTE

This tool works exclusively with EVM-compatible blockchain networks (Ethereum, Polygon, Arbitrum, Optimism, Base, etc.). It requires the scalar 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. Opening a scalar market position involves significant risk — the value of the position can fluctuate, and you may lose your collateral if the price moves against your position. Ensure you understand the market mechanics, the bounds you are setting, and the potential risks before opening a position. Always test on a testnet first and verify that the position parameters are correct before trading with real funds.