/**
* Position estimation service
* Handles estimating position opens/increases
*/
import { fetchIncreaseEstimate } from "../api.js";
import { EstimateOpenPositionOutput } from "../types.js";
/**
* Estimate opening or increasing a position
* @param walletAddress - Wallet public address
* @param asset - Asset symbol (SOL, ETH, BTC)
* @param side - Trade side (Long or Short)
* @param collateralAmount - USDC collateral amount
* @param leverage - Leverage multiplier
* @param maxSlippageBps - Maximum slippage in basis points
*/
export async function estimateOpenPosition(
walletAddress: string,
asset: string,
side: "Long" | "Short",
collateralAmount: number,
leverage: number,
maxSlippageBps: number
): Promise<EstimateOpenPositionOutput> {
// Fetch estimate from API
const response = await fetchIncreaseEstimate(
walletAddress,
asset,
side,
collateralAmount,
leverage,
maxSlippageBps
);
const quote = response.quote;
// Transform to output format
return {
timestamp_unix: Math.floor(Date.now() / 1000),
fees_to_pay: {
open_fee_usd: parseFloat(quote.openFeeUsd),
price_impact_fee_usd: parseFloat(quote.priceImpactFeeUsd),
borrow_fees_to_settle_usd: parseFloat(quote.outstandingBorrowFeeUsd),
},
resulting_position: {
average_entry_price: parseFloat(quote.entryPriceUsd),
total_size_usd: parseFloat(quote.positionSizeUsd),
total_collateral_usd: parseFloat(quote.positionCollateralSizeUsd),
leverage: parseFloat(quote.leverage),
liquidation_price: parseFloat(quote.liquidationPriceUsd),
},
};
}
