Fix Tau validations in ECLP Math (#1185)

balancer · Dec 20, 2024 · 080bdd7 · 080bdd7
1 parent 2cb4ac9
commit 080bdd7
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/pkg/pool-gyro/contracts/lib/GyroECLPMath.sol b/pkg/pool-gyro/contracts/lib/GyroECLPMath.sol
@@ -31,6 +31,9 @@ library GyroECLPMath {
     error DerivedTauAlphaNotNormalized();
     error DerivedTauBetaNotNormalized();
     error StretchingFactorWrong();
+    error DerivedTauAlphaYWrong();
+    error DerivedTauBetaYWrong();
+    error DerivedTauXWrong();
     error DerivedUWrong();
     error DerivedVWrong();
     error DerivedWWrong();
@@ -89,6 +92,11 @@ library GyroECLPMath {
         IGyroECLPPool.EclpParams memory params,
         IGyroECLPPool.DerivedEclpParams memory derived
     ) internal pure {
+        // If tau is not within the range below, the pool math may be messed.
+        require(derived.tauAlpha.y > 0, DerivedTauAlphaYWrong());
+        require(derived.tauBeta.y > 0, DerivedTauBetaYWrong());
+        require(derived.tauBeta.x > derived.tauAlpha.x, DerivedTauXWrong());
+
         int256 norm2;
         norm2 = scalarProdXp(derived.tauAlpha, derived.tauAlpha);