Added check for eventIndex == 0.

src/mappings/erc20Templates.ts

@@ -123,6 +123,7 @@ export function handlerOrderReused(event: OrderReused): void {
     event.transaction.from.toHex(),
     event.logIndex.toI32()
   )
+  log.info('searched order id: {}', [order.id])
 
   if (!order) return
 
@@ -265,6 +266,7 @@ export function handleProviderFee(event: ProviderFee): void {
     event.transaction.from.toHex(),
     event.logIndex.toI32()
   )
+  const orderId = order.id
 
   if (order) {
     order.providerFee = providerFee
@@ -272,6 +274,7 @@ export function handleProviderFee(event: ProviderFee): void {
     order.save()
     return
   }
+
   let orderReuse = searchOrderReusedForEvent(
     event.transaction.hash.toHex(),
     event.address.toHex(),
@@ -280,12 +283,13 @@ export function handleProviderFee(event: ProviderFee): void {
   if (orderReuse) {
     orderReuse.providerFee = providerFee
     orderReuse.providerFeeValidUntil = event.params.validUntil
+    log.info('order reused id: {}', [orderReuse.id])
     orderReuse.save()
   } else {
     orderReuse = new OrderReuse(event.transaction.hash.toHex())
     orderReuse.providerFee = providerFee
     orderReuse.providerFeeValidUntil = event.params.validUntil
-    orderReuse.order = order.id
+    orderReuse.order = orderId!
     orderReuse.createdTimestamp = event.block.timestamp.toI32()
     orderReuse.tx = event.transaction.hash.toHex()
     orderReuse.block = event.block.number.toI32()

src/mappings/utils/orderUtils.ts

@@ -41,6 +41,23 @@ export function searchOrderForEvent(
   eventIndex: number
 ): Order {
   let firstEventIndex = eventIndex - 1
+  if (eventIndex === 0) {
+    const orderId = getOrderId(
+      transactionHash,
+      address,
+      transactionFrom,
+      eventIndex
+    )
+    log.info('trying with this orderId: {}', [orderId])
+    const order = Order.load(orderId)
+    if (order !== null && order.datatoken == address) {
+      log.info('found order datatoken: {} and event address: {}', [
+        order.datatoken,
+        address
+      ])
+      return order
+    }
+  }
   while (firstEventIndex >= 0) {
     const orderId = getOrderId(
       transactionHash,
@@ -69,12 +86,29 @@ export function searchOrderReusedForEvent(
   eventIndex: number
 ): OrderReuse {
   let firstEventIndex = eventIndex - 1
+  if (eventIndex === 0) {
+    const orderReused = OrderReuse.load(`${transactionHash}-${eventIndex}`)
+    if (orderReused !== null) {
+      log.info('found reused order: {} ', [orderReused.id])
+      const order = Order.load(orderReused.order)
+      if (order !== null && order.datatoken == eventAddress) {
+        log.info('found order: {} ', [order.id])
+        log.info('found reused order datatoken: {} and event address: {}', [
+          order.datatoken,
+          eventAddress
+        ])
+        return orderReused
+      }
+    }
+  }
   while (firstEventIndex >= 0) {
     const orderReused = OrderReuse.load(`${transactionHash}-${firstEventIndex}`)
 
     if (orderReused !== null) {
+      log.info('found reused order: {} ', [orderReused.id])
       const order = Order.load(orderReused.order)
       if (order !== null && order.datatoken == eventAddress) {
+        log.info('found order: {} ', [order.id])
         log.info('found reused order datatoken: {} and event address: {}', [
           order.datatoken,
           eventAddress