fix swap fee for osmosis (#725)

src/api/swap/getOsmosisSwapFee.ts

@@ -1,14 +1,23 @@
-export default async function getPools(
+import { BN_ZERO } from 'constants/math'
+import { STANDARD_SWAP_FEE } from 'utils/constants'
+
+export default async function getOsmosisSwapFee(
   chainConfig: ChainConfig,
   poolIds: string[],
-): Promise<Pool[]> {
+): Promise<number> {
   const promises = poolIds.map((poolId) =>
     fetch(chainConfig.endpoints.pools.replace('POOL_ID', poolId)),
   )
 
   const responses = await Promise.all(promises)
 
-  return await Promise.all(responses.map(async (pool) => (await pool.json()).pool as Pool))
+  const pools = await Promise.all(responses.map(async (pool) => (await pool.json()).pool as Pool))
+
+  if (!pools?.length) return STANDARD_SWAP_FEE
+
+  return pools
+    .reduce((acc, pool) => acc.plus(pool?.pool_params?.swap_fee || STANDARD_SWAP_FEE), BN_ZERO)
+    .toNumber()
 }
 
 interface Pool {

src/components/Trade/TradeModule/SwapForm/TradeSummary.tsx

@@ -62,7 +62,7 @@ export default function TradeSummary(props: Props) {
   const assets = useAllAssets()
   const sellAssetPrice = usePrice(sellAsset.denom)
   // FIXME: ⛓️ Swap fee needs to be chainagnostic!
-  const swapFee = useSwapFee([])
+  const swapFee = useSwapFee(route.map((route) => route.pool_id))
   const [showSummary, setShowSummary] = useToggle()
   const { liquidationPrice, isUpdatingLiquidationPrice } = useLiquidationPrice(
     props.liquidationPrice,

src/hooks/useSwapFee.ts

@@ -1,22 +1,23 @@
 import useSWR from 'swr'
 
-import getSwapFees from 'api/swap/getPools'
-import { BN_ZERO } from 'constants/math'
+import getOsmosisSwapFee from 'api/swap/getOsmosisSwapFee'
 import useChainConfig from 'hooks/useChainConfig'
-
-const STANDARD_SWAP_FEE = 0.002
+import { ChainInfoID } from 'types/enums/wallet'
+import { STANDARD_SWAP_FEE } from 'utils/constants'
 
 export default function useSwapFee(poolIds: string[]) {
   const chainConfig = useChainConfig()
-  const { data: pools } = useSWR(
+  const { data: swapFee } = useSWR(
     `chains/${chainConfig.id}/swapFees/${poolIds.join(',')}`,
-    () => getSwapFees(chainConfig, poolIds),
+    () => {
+      if (chainConfig.id === ChainInfoID.Pion1) {
+        return STANDARD_SWAP_FEE
+      }
+
+      return getOsmosisSwapFee(chainConfig, poolIds)
+    },
     {},
   )
 
-  if (!pools?.length) return STANDARD_SWAP_FEE
-
-  return pools
-    .reduce((acc, pool) => acc.plus(pool?.pool_params?.swap_fee || STANDARD_SWAP_FEE), BN_ZERO)
-    .toNumber()
+  return swapFee ?? STANDARD_SWAP_FEE
 }

src/types/interfaces/swap.d.ts

@@ -0,0 +1,29 @@
+export interface AstroportSwapRouteResponse {
+  amount_in: string
+  amount_out: string
+  decimals_in: number
+  decimals_out: number
+  denom_in: string
+  denom_out: string
+  id: string
+  price_difference: number
+  price_impact: number
+  price_in: number
+  price_out: number
+  swaps: Swap[]
+  value_in: string
+  value_out: string
+}
+
+export interface AstroportSwapResponse {
+  contract_addr: string
+  from: string
+  illiquid: boolean
+  to: string
+  type: SwapPoolType
+}
+
+export enum AstroportSwapPoolType {
+  XYK = 'xyk',
+  PCL = 'pcl',
+}

src/utils/constants.ts

@@ -21,3 +21,4 @@ export const DEFAULT_PORTFOLIO_STATS = [
 ]
 
 export const ENABLE_AUTO_REPAY = true
+export const STANDARD_SWAP_FEE = 0.002