From 01fa6e218417230cc0cfa1cb898f9054c3b23efe Mon Sep 17 00:00:00 2001
From: prathamesh0 <42446521+prathamesh0@users.noreply.github.com>
Date: Fri, 17 Dec 2021 11:57:32 +0530
Subject: [PATCH] Fix asserts for nullable values in uni-info-watcher mapping
 code (#320)

---
 packages/uni-info-watcher/src/indexer.ts | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/packages/uni-info-watcher/src/indexer.ts b/packages/uni-info-watcher/src/indexer.ts
index 2119d44e..68183990 100644
--- a/packages/uni-info-watcher/src/indexer.ts
+++ b/packages/uni-info-watcher/src/indexer.ts
@@ -904,7 +904,8 @@ export class Indexer implements IndexerInterface {
       assert(token0 && token1, 'Pool tokens not found.');
 
       const oldTick = pool.tick;
-      assert(oldTick);
+      // Check that the tick value is not null (can be zero).
+      assert(oldTick !== null);
 
       // Amounts - 0/1 are token deltas. Can be positive or negative.
       const amount0 = convertTokenToDecimal(BigInt(swapEvent.amount0), BigInt(token0.decimals));
@@ -1098,7 +1099,9 @@ export class Indexer implements IndexerInterface {
 
       // Update inner vars of current or crossed ticks.
       const newTick = pool.tick;
-      assert(newTick);
+      // Check that the tick value is not null (can be zero).
+      assert(newTick !== null);
+
       const tickSpacing = feeTierToTickSpacing(pool.feeTier);
       const modulo = newTick % tickSpacing;