Add fetchConversionRate from jup

src/api/common/index.ts

@@ -7,6 +7,9 @@ export * from './staking'
 export * as helius from './helius'
 export * from './helius'
 
+export * as jup from './jup'
+export * from './jup'
+
 export * as user from './user'
 export * from './user'
 

src/api/common/jup/index.ts

@@ -0,0 +1,41 @@
+import { createJupiterApiClient } from '@jup-ag/api'
+import { LendingTokenType } from 'fbonds-core/lib/fbond-protocol/types'
+
+import { USDC_ADDRESS, WSOL_ADDRESS } from '@banx/constants'
+import { getTokenDecimals } from '@banx/utils'
+
+type FetchConversionRate = {
+  lendingTokenType: LendingTokenType
+  tokenMint: string
+}
+export const fetchConversionRate = async ({
+  lendingTokenType,
+  tokenMint,
+}: FetchConversionRate): Promise<number> => {
+  try {
+    const tokenDecimals = getTokenDecimals(lendingTokenType)
+    const lendingTokenMint =
+      lendingTokenType === LendingTokenType.Usdc ? USDC_ADDRESS : WSOL_ADDRESS
+
+    const jupiterQuoteApi = createJupiterApiClient()
+    const quote = await jupiterQuoteApi.quoteGet({
+      inputMint: lendingTokenMint,
+      outputMint: tokenMint,
+      amount: getTokenDecimals(lendingTokenType),
+      //TODO Fix slippage problem
+      slippageBps: 300,
+      computeAutoSlippage: true,
+      swapMode: 'ExactIn',
+      onlyDirectRoutes: true,
+      asLegacyTransaction: false,
+      maxAccounts: 64,
+      minimizeSlippage: false,
+      // dexes: ['Whirlpool'],
+    })
+
+    return parseInt(quote.outAmount) / tokenDecimals
+  } catch (error) {
+    console.error(error)
+    throw new Error('Failed to fetch token price')
+  }
+}