Fix: update previous tick to oracle during swap step

RainRaydium · RainRaydium · commit e4394adcb9c7 · 2024-10-18T16:44:11.000+08:00
diff --git a/programs/amm/src/instructions/swap.rs b/programs/amm/src/instructions/swap.rs
@@ -475,11 +475,10 @@ pub fn swap_internal<'b, 'info>(
     }
     // update tick
     if state.tick != pool_state.tick_current {
+        // update the previous tick to the observation
+        observation_state.update(block_timestamp, pool_state.tick_current);
         pool_state.tick_current = state.tick;
     }
-    // update the previous price to the observation
-    observation_state.update(block_timestamp, pool_state.tick_current);
-
     pool_state.sqrt_price_x64 = state.sqrt_price_x64;
 
     if liquidity_start != state.liquidity {

Original file line number	Diff line number	Diff line change
`@@ -475,11 +475,10 @@ pub fn swap_internal<'b, 'info>(`
`475`	`475`	`}`
`476`	`476`	`// update tick`
`477`	`477`	`if state.tick != pool_state.tick_current {`
	`478`	`+ // update the previous tick to the observation`
	`479`	`+ observation_state.update(block_timestamp, pool_state.tick_current);`
`478`	`480`	`pool_state.tick_current = state.tick;`
`479`	`481`	`}`
`480`		`- // update the previous price to the observation`
`481`		`- observation_state.update(block_timestamp, pool_state.tick_current);`
`482`		`-`
`483`	`482`	`pool_state.sqrt_price_x64 = state.sqrt_price_x64;`
`484`	`483`
`485`	`484`	`if liquidity_start != state.liquidity {`