Manage collateral

Adjust margin to move leverage and liquidation price.

Add or remove collateral on an open position to change its leverage and liquidation price — without changing size.

Add collateral (reduce leverage)

curl -X POST $FLASH_API_URL/transaction-builder/add-collateral -d '{
  "marketSymbol": "SOL", "side": "LONG",
  "depositAmountUi": "50.0", "depositTokenSymbol": "USDC", "owner": "<WALLET>"
}'

The response includes existingLeverage → newLeverage and existingLiquidationPrice → newLiquidationPrice, plus maxAddableUsd.

Remove collateral (increase leverage)

curl -X POST $FLASH_API_URL/transaction-builder/remove-collateral -d '{
  "marketSymbol": "SOL", "side": "LONG",
  "withdrawAmountUsdUi": "25.00", "withdrawTokenSymbol": "USDC", "owner": "<WALLET>"
}'

Returns receiveAmountUi and maxWithdrawableUsd alongside the new leverage / liq price.

Preview first

Check the resulting leverage and liquidation price before you commit:

curl -X POST $FLASH_API_URL/preview/margin -d '{
  "marketSymbol": "SOL", "side": "LONG", "marginDeltaUsdUi": "50.00", "action": "ADD", "owner": "<WALLET>"
}'

→ Preview fees & PnL · Full fields: API reference › Trading › Collateral

Both builders submit to the v2 RPC.