fix: reuse last and reject reuse interaction

packages/server/lib/cash-in/cash-in-tx.js

@@ -30,6 +30,7 @@ module.exports = {
   post,
   monitorPending,
   cancel,
+  doesTxReuseAddress,
   PENDING_INTERVAL,
   TRANSACTION_STATES,
 }
@@ -201,7 +202,7 @@ function postProcess(r, pi, isBlacklisted, addressReuse, walletScore) {
 // If the current customer is anon, we can still allow one other customer to use the address,
 // So we count distinct customers plus the current customer if they are not anonymous.
 // To prevent malicious blocking of address, we only check for txs with actual fiat
-function doesTxReuseAddress(tx) {
+function doesTxReuseAddress({ toAddress, customerId }) {
   const sql = `
     SELECT COUNT(*) > 1 as exists
     FROM (SELECT DISTINCT customer_id
@@ -214,7 +215,7 @@ function doesTxReuseAddress(tx) {
           WHERE $2 != $3) t;
   `
   return db
-    .one(sql, [tx.toAddress, tx.customerId, constants.anonymousCustomer.uuid])
+    .one(sql, [toAddress, customerId, constants.anonymousCustomer.uuid])
     .then(({ exists }) => exists)
 }
 

packages/server/lib/routes/customerRoutes.js

@@ -25,6 +25,7 @@ const Tx = require('../tx')
 const loyalty = require('../loyalty')
 const logger = require('../logger')
 const externalCompliance = require('../compliance-external')
+const { doesTxReuseAddress } = require('../cash-in/cash-in-tx')
 
 function updateCustomerCustomInfoRequest(customerId, patch) {
   const promise = _.isNil(patch.data)
@@ -364,6 +365,18 @@ function addOrUpdateCustomer(
           return { ...customer, lastUsedAddress }
         })
     })
+    .then(customer => {
+      const { rejectAddressReuse } = configManager.getCompliance(config)
+      if (!rejectAddressReuse || !customer.lastUsedAddress) return customer
+
+      return doesTxReuseAddress({
+        toAddress: customer.lastUsedAddress,
+        customerId: customer.id,
+      }).then(isReused => {
+        const newAddress = isReused ? null : customer.lastUsedAddress
+        return { ...customer, lastUsedAddress: newAddress }
+      })
+    })
 }
 
 function getOrAddCustomerPhone(req, res, next) {