@lifi/widget/src/hooks/useChains.ts

LI.FI Widget for cross-chain bridging and swapping. It will drive your multi-chain strategy and attract new users from everywhere.

import type { ChainType } from '@lifi/sdk'
import { useMemo } from 'react'
import { useWidgetConfig } from '../providers/WidgetProvider/WidgetProvider.js'
import type { FormType } from '../stores/form/types.js'
import { getConfigItemSets, isFormItemAllowed } from '../utils/item.js'
import { useAvailableChains } from './useAvailableChains.js'

export const useChains = (type?: FormType, chainTypes?: ChainType[]) => {
  const { chains } = useWidgetConfig()
  const {
    chains: availableChains,
    isLoading: isLoadingAvailableChains,
    getChainById,
  } = useAvailableChains()

  const filteredChains = useMemo(() => {
    const chainsConfigSets = getConfigItemSets(
      chains,
      (chains) => new Set(chains),
      type
    )
    const filteredChains = type
      ? availableChains?.filter(
          (chain) =>
            isFormItemAllowed(chain.id, chainsConfigSets, type) &&
            // Check against chain types if they are provided
            (chainTypes?.includes(chain.chainType) ?? true)
        )
      : availableChains?.filter((chain) =>
          isFormItemAllowed(chain.id, chainsConfigSets)
        )
    return filteredChains
  }, [availableChains, chainTypes, chains, type])

  return {
    chains: filteredChains,
    getChainById,
    isLoading: isLoadingAvailableChains,
  }
}