Squid Dev Documentation
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Build a pre-hook

preHooks are executed on the Squid Multicall contract on the fromChain before any swaps or bridging has occurred.
After preHooks, the full balance on the Multicall will be swapped or bridged across chains.
The fromToken and fromAmount in your route request should be the amount of tokens you expect to on the Multicall after the preHooks are executed.
Example: repay an AAVE loan before swapping
SDK
API
// Create contract interface and encode repay function for Aave
const aaveLendingPoolInterface = new ethers.utils.Interface(aavePoolAbi);
const repayEncodedData = aaveLendingPoolInterface.encodeFunctionData('repay', [
repayAsset,
repayAmount,
repayInterestRateMode,
repayOnBehalfOf,
]);
const preHooks = [
{
callType: 0, // SquidCallType.DEFAULT
target: aavePoolAddress,
value: '0',
callData: repayEncodedData,
estimatedGas: '50000',
payload: {
tokenAddress: repayAsset,
inputPos: 1,
},
},
]
// coming soon tm