From 1a49cdb57d7c77a1542a1cff35c7e66c22c6a324 Mon Sep 17 00:00:00 2001
From: Siddharth <siddharthtiwarikreplind@gmail.com>
Date: Mon, 22 Jul 2024 17:58:05 +0530
Subject: [PATCH] chore(voucher): use settlement amount to get voucher price
 (#4546)

---
 apps/voucher/app/create/client-side-page.tsx  |  2 +-
 .../mutation/create-withdraw-link.ts          | 43 ++++++++++++++++---
 apps/voucher/lib/amount-calculator.ts         | 39 +++++++++++------
 apps/voucher/services/db/index.ts             | 18 ++++++++
 4 files changed, 83 insertions(+), 19 deletions(-)

diff --git a/apps/voucher/app/create/client-side-page.tsx b/apps/voucher/app/create/client-side-page.tsx
index 30c521a6af..3aa1859c60 100644
--- a/apps/voucher/app/create/client-side-page.tsx
+++ b/apps/voucher/app/create/client-side-page.tsx
@@ -70,7 +70,7 @@ export default function CreatePage({ platformFeesInPpm }: Props) {
   }, [])
 
   const voucherAmountInCents =
-    amountCalculator.voucherAmountAfterPlatformFeesAndCommission({
+    amountCalculator.voucherAmountAfterPlatformFeesAndCommission.fromPrice({
       voucherPrice: currencyConversion?.currencyConversionEstimation.usdCentAmount,
       commissionPercentage: Number(commissionPercentage),
       platformFeesInPpm,
diff --git a/apps/voucher/graphql/resolvers/mutation/create-withdraw-link.ts b/apps/voucher/graphql/resolvers/mutation/create-withdraw-link.ts
index e852526c10..32bca3b1af 100644
--- a/apps/voucher/graphql/resolvers/mutation/create-withdraw-link.ts
+++ b/apps/voucher/graphql/resolvers/mutation/create-withdraw-link.ts
@@ -6,7 +6,11 @@ import {
   getWalletDetails,
   getWalletDetailsFromWalletId,
 } from "@/utils/helpers"
-import { createWithdrawLinkMutation, updateWithdrawLinkStatus } from "@/services/db"
+import {
+  createWithdrawLinkMutation,
+  updateWithdrawLink,
+  updateWithdrawLinkStatus,
+} from "@/services/db"
 
 import { authOptions } from "@/app/api/auth/[...nextauth]/auth"
 import { PaymentSendResult, Status, WalletCurrency } from "@/lib/graphql/generated"
@@ -18,6 +22,7 @@ import { escrowApolloClient } from "@/services/galoy/client/escrow"
 import { amountCalculator } from "@/lib/amount-calculator"
 
 import { env } from "@/env"
+import { convertCurrency } from "@/lib/utils"
 
 export const createWithdrawLink = async (
   _: undefined,
@@ -53,8 +58,8 @@ export const createWithdrawLink = async (
 
   // amount that would be sent to user
   const voucherAmountAfterPlatformFeesAndCommission = Number(
-    amountCalculator
-      .voucherAmountAfterPlatformFeesAndCommission({
+    amountCalculator.voucherAmountAfterPlatformFeesAndCommission
+      .fromPrice({
         voucherPrice: salesAmountInCents,
         commissionPercentage,
         platformFeesInPpm,
@@ -265,10 +270,38 @@ export const handleBtcWalletPayment = async ({
   if (btcPaymentResponse.intraLedgerPaymentSend.errors.length > 0)
     return new Error(btcPaymentResponse.intraLedgerPaymentSend.errors[0].message)
 
+  // TODO handle case if settlementDisplayCurrency is changed for some reason
+  if (
+    !btcPaymentResponse.intraLedgerPaymentSend.transaction?.settlementDisplayAmount ||
+    btcPaymentResponse.intraLedgerPaymentSend.transaction.settlementDisplayCurrency !==
+      "USD"
+  ) {
+    console.error("error while verifying Settlement Amount and Settlement Currency")
+    return new Error("Something went wrong, please contact support if error persists")
+  }
+
+  const amountPaidToEscrowInCents = convertCurrency.usdToCents({
+    usd: Math.abs(
+      btcPaymentResponse.intraLedgerPaymentSend.transaction?.settlementDisplayAmount,
+    ),
+  })
+
+  const voucherAmountInCents = Number(
+    amountCalculator.voucherAmountAfterPlatformFeesAndCommission
+      .fromCommission({
+        platformFeesInPpm: env.PLATFORM_FEES_IN_PPM,
+        voucherAmountAfterCommission: amountPaidToEscrowInCents,
+      })
+      .toFixed(0),
+  )
+
   if (btcPaymentResponse.intraLedgerPaymentSend.status === PaymentSendResult.Success) {
-    const response = await updateWithdrawLinkStatus({
+    const response = await updateWithdrawLink({
       id: createWithdrawLinkResponse.id,
-      status: Status.Active,
+      updates: {
+        status: Status.Active,
+        voucherAmountInCents: voucherAmountInCents,
+      },
     })
     return response
   }
diff --git a/apps/voucher/lib/amount-calculator.ts b/apps/voucher/lib/amount-calculator.ts
index e54d698227..a390667f9a 100644
--- a/apps/voucher/lib/amount-calculator.ts
+++ b/apps/voucher/lib/amount-calculator.ts
@@ -1,17 +1,30 @@
 export const amountCalculator = {
-  voucherAmountAfterPlatformFeesAndCommission({
-    voucherPrice,
-    commissionPercentage,
-    platformFeesInPpm,
-  }: {
-    voucherPrice: number
-    commissionPercentage: number
-    platformFeesInPpm: number
-  }): number {
-    const commissionAmount = voucherPrice * (commissionPercentage / 100)
-    const platformFees = voucherPrice * (platformFeesInPpm / 1000000)
-    const result = voucherPrice - commissionAmount - platformFees
-    return Math.max(result, 0)
+  voucherAmountAfterPlatformFeesAndCommission: {
+    fromPrice: ({
+      voucherPrice,
+      commissionPercentage,
+      platformFeesInPpm,
+    }: {
+      voucherPrice: number
+      commissionPercentage: number
+      platformFeesInPpm: number
+    }) => {
+      const commissionAmount = voucherPrice * (commissionPercentage / 100)
+      const platformFees = voucherPrice * (platformFeesInPpm / 1000000)
+      const result = voucherPrice - commissionAmount - platformFees
+      return Math.max(result, 0)
+    },
+    fromCommission: ({
+      voucherAmountAfterCommission,
+      platformFeesInPpm,
+    }: {
+      voucherAmountAfterCommission: number
+      platformFeesInPpm: number
+    }) => {
+      const platformFees = voucherAmountAfterCommission * (platformFeesInPpm / 1000000)
+      const result = voucherAmountAfterCommission - platformFees
+      return Math.max(result, 0)
+    },
   },
   voucherAmountAfterCommission({
     voucherPrice,
diff --git a/apps/voucher/services/db/index.ts b/apps/voucher/services/db/index.ts
index 567b92f366..efeaa8833e 100644
--- a/apps/voucher/services/db/index.ts
+++ b/apps/voucher/services/db/index.ts
@@ -165,3 +165,21 @@ export async function updateWithdrawLinkStatus({
       : new Error("Failed to update withdraw link status")
   }
 }
+
+export async function updateWithdrawLink({
+  id,
+  updates,
+}: {
+  id: string
+  updates: Partial<WithdrawLink>
+}): Promise<WithdrawLink | Error> {
+  try {
+    const [updatedWithdrawLink] = await knex("WithdrawLinks")
+      .where({ id })
+      .update(updates)
+      .returning("*")
+    return updatedWithdrawLink
+  } catch (error) {
+    return error instanceof Error ? error : new Error("Failed to update withdraw link")
+  }
+}