SaturnSwap Limit Orders

Guide users through placing and cancelling limit orders on SaturnSwap.

Capabilities

• Place limit buy orders (bid ADA for tokens at a target price)
• Place limit sell orders (offer tokens at a target ADA price)
• Cancel existing open orders
• Preview order placement against current order book

Place Limit Order Flow

1. Find the pool — look up by ticker or policy ID
2. Check current prices — show best bid/ask and current price
3. Calculate amounts — user specifies price and quantity
4. Build transaction — call createLimitOrder
5. Hand off to operator — for signing and submission

Cancel Order Flow

1. List open orders — use getUserOrders to find active orders
2. Confirm which orders to cancel — get explicit user approval
3. Build cancel transaction — call cancelOrder with UTxO IDs
4. Hand off to operator — for signing and submission

Scripts

Preview Limit Order

node scripts/preview-limit.js --pool <uuid> --side buy|sell --price <ada-per-token> --amount <display-units>

Create Limit Order Transaction

node scripts/create-limit.js --address <bech32> --pool <uuid> --policy <policyId> --asset <assetName> --sell <amount> --buy <amount>

Create Cancel Transaction

node scripts/create-cancel.js --address <bech32> --utxo-ids <id1,id2,...>

Key Concepts

• Limit buy: You sell ADA to buy tokens at your target price or better

- policyId/assetName = "" (selling ADA), tokenAmountSell = ADA amount, tokenAmountBuy = tokens you want

• Limit sell: You sell tokens to get ADA at your target price or better

- policyId/assetName = token's policy/asset, tokenAmountSell = tokens, tokenAmountBuy = ADA you want

• Price = tokenAmountBuy / tokenAmountSell (or vice versa depending on direction)
• All amounts in display units

Safety Rules

• Always show the effective price and compare to current market price
• Warn if limit price is >20% away from market (possible mistake)
• Require confirmation before creating the transaction
• For cancels, show order details before confirming