SDK Params

fillOrKillParams

The fillOrKillParams object sets two different types of slippage protection when initiating a swap.

1. minimum accepted price This protects the swapper against price changes between a quote and the execution of a swap by setting a minimum accepted price. If the minimum price cannot be met with the available liquidity during the specified number of blocks, deposited assets will be refunded to the specified refund address.
2. live price protection This protects the swapper from getting an execution price that significantly deviates from the global index price of the asset (as determined by an oracle) ensuring the LPs are offering competitive pricing. Similar to other slippage settings, the execution of the swap will be paused until an LP offers a price that is within the specified deviation or the swap deadline is reached - in which case the swap will be refunded. This setting is especially useful during longer DCA swaps where the price of the asset is moving in favor of the swapper. i.e the slippage tolerance will “follow” the global price of the asset. In case the price moves against the swapper, it will still execute as long as the execution price is above the minimum accepted price.

Slippage tolerance can be specified by using the slippageTolerancePercent property. slippageTolerancePercent must be a number between 0 and 100. This percent is used together with the estimatedPrice of the quote to calculate a minimum accepted swap price:

const minimumPrice =
  quote.estimatedPrice * (1 - Number(slippageTolerancePercent) / 100);

Alternatively, you can manually provide a minPrice value. The minimum price is the ratio between the human readable destination amount and the human readable source amount, e.g. 3500 for a swap from ETH to USDC if you want to receive at least 3500 USDC per ETH after fees.

Live price slippage can be specified by using the livePriceSlippageTolerancePercent property. It must be a number between 0 and 100. The default behavior is to use the recommended value from the quote but can be overridden or set to false to disable live price protection. If the quote does not have a recommended live price slippage tolerance, this setting is not available for the asset pair and should not be set.

If either of the slippage tolerance properties are invalidated, the swap will be refunded to the specified refund address. Refunds are subject to a broadcast fee on the source chain to pay for the transactions sent by the Chainflip protocol. The boost or deposit fee paid will not not be refunded.

Example

const fillOrKillParams = {
  refundAddress: "0xa56A6be23b6Cf39D9448FF6e897C29c41c8fbDFF", // address to which assets are refunded
  retryDurationBlocks: 100, // 100 blocks * 6 seconds = 10 minutes before deposits are refunded
  slippageTolerancePercent: quote.recommendedSlippageTolerancePercent, // use recommended slippage tolerance from quote
  livePriceSlippageTolerancePercent:
    quote.recommendedLivePriceSlippageTolerancePercent, // use recommended live price slippage tolerance from quote
};

ccmParams

The Cross-Chain Messaging optional ccmParams object enables to pass a Cross-Chain Message to a receiver contract/program on the destination chain.

Example

const ccmParams = {
  message: "0xdeadc0de",
  gasBudget: 250_000,
};