From 2317096f772fd7687b29c85cfdef1d9f8e652643 Mon Sep 17 00:00:00 2001
From: MerlinEgalite <egalite.merlin@gmail.com>
Date: Wed, 5 Jul 2023 08:55:28 +0200
Subject: [PATCH 1/2] perf: != 0 instead of <

---
 src/Market.sol | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/src/Market.sol b/src/Market.sol
index 6f7cb8148..39b5ca60a 100644
--- a/src/Market.sol
+++ b/src/Market.sol
@@ -62,7 +62,7 @@ contract Blue {
     function supply(Market calldata market, uint amount) external {
         Id id = Id.wrap(keccak256(abi.encode(market)));
         require(lastUpdate[id] != 0, "unknown market");
-        require(amount > 0, "zero amount");
+        require(amount != 0, "zero amount");
 
         accrueInterests(id);
 
@@ -83,7 +83,7 @@ contract Blue {
     function withdraw(Market calldata market, uint amount) external {
         Id id = Id.wrap(keccak256(abi.encode(market)));
         require(lastUpdate[id] != 0, "unknown market");
-        require(amount > 0, "zero amount");
+        require(amount != 0, "zero amount");
 
         accrueInterests(id);
 
@@ -103,7 +103,7 @@ contract Blue {
     function borrow(Market calldata market, uint amount) external {
         Id id = Id.wrap(keccak256(abi.encode(market)));
         require(lastUpdate[id] != 0, "unknown market");
-        require(amount > 0, "zero amount");
+        require(amount != 0, "zero amount");
 
         accrueInterests(id);
 
@@ -127,7 +127,7 @@ contract Blue {
     function repay(Market calldata market, uint amount) external {
         Id id = Id.wrap(keccak256(abi.encode(market)));
         require(lastUpdate[id] != 0, "unknown market");
-        require(amount > 0, "zero amount");
+        require(amount != 0, "zero amount");
 
         accrueInterests(id);
 
@@ -145,7 +145,7 @@ contract Blue {
     function supplyCollateral(Market calldata market, uint amount) external {
         Id id = Id.wrap(keccak256(abi.encode(market)));
         require(lastUpdate[id] != 0, "unknown market");
-        require(amount > 0, "zero amount");
+        require(amount != 0, "zero amount");
 
         accrueInterests(id);
 
@@ -157,7 +157,7 @@ contract Blue {
     function withdrawCollateral(Market calldata market, uint amount) external {
         Id id = Id.wrap(keccak256(abi.encode(market)));
         require(lastUpdate[id] != 0, "unknown market");
-        require(amount > 0, "zero amount");
+        require(amount != 0, "zero amount");
 
         accrueInterests(id);
 

From 1ae8880036c1f0fa23fb839477c7eaa63c338e43 Mon Sep 17 00:00:00 2001
From: MerlinEgalite <egalite.merlin@gmail.com>
Date: Wed, 5 Jul 2023 11:11:10 +0200
Subject: [PATCH 2/2] perf: same for isHealthy and liquidate

---
 src/Market.sol | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/Market.sol b/src/Market.sol
index 14a12d45a..fe1b2b1de 100644
--- a/src/Market.sol
+++ b/src/Market.sol
@@ -177,7 +177,7 @@ contract Blue {
     function liquidate(Market calldata market, address borrower, uint seized) external {
         Id id = Id.wrap(keccak256(abi.encode(market)));
         require(lastUpdate[id] != 0, "unknown market");
-        require(seized > 0, "zero amount");
+        require(seized != 0, "zero amount");
 
         accrueInterests(id);
 
@@ -227,7 +227,7 @@ contract Blue {
     function isHealthy(Market calldata market, Id id, address user) private view returns (bool) {
         uint borrowShares = borrowShare[id][user];
         // totalBorrowShares[id] > 0 when borrowShares > 0.
-        uint borrowValue = borrowShares > 0
+        uint borrowValue = borrowShares != 0
             ? borrowShares.wMul(totalBorrow[id]).wDiv(totalBorrowShares[id]).wMul(market.borrowableOracle.price())
             : 0;
         uint collateralValue = collateral[id][user].wMul(market.collateralOracle.price());