Enforce min slippage of 0.1% on bLUSD lp withdrawal to reduce transac…

…tion failure

README.md

@@ -1557,6 +1557,9 @@ yarn start-demo:dev-frontend
 
 This spawns a modified version of dev-frontend that automatically signs transactions so you don't need to interact with a browser wallet. It directly uses the local forked RPC node. 
 
+You may need to wait a minute or so for your fork mainnet provider to load and cache all the blockchain state at your chosen block number. Refresh the page after 5 minutes.
+
+
 #### Build dev-frontend for production
 
 In a freshly cloned & installed monorepo, or if you have only modified code inside the dev-frontend package:

packages/dev-frontend/src/components/Bonds/views/managing/WithdrawPane.tsx

@@ -75,9 +75,10 @@ export const WithdrawPane: React.FC = () => {
     setOutput(checkOutput(e.target.value));
 
   const handleConfirmPressed = () => {
+    const curveSlippage = 0.001; // Allow mininum of %0.1% slippage due to Curve rounding issues
     if (output === "both") {
-      const minBLusdAmount = withdrawal.get(BLusdAmmTokenIndex.BLUSD);
-      const minLusdAmount = withdrawal.get(BLusdAmmTokenIndex.LUSD);
+      const minBLusdAmount = withdrawal.get(BLusdAmmTokenIndex.BLUSD)?.mul(1 - curveSlippage);
+      const minLusdAmount = withdrawal.get(BLusdAmmTokenIndex.LUSD)?.mul(1 - curveSlippage);
 
       if (minBLusdAmount === undefined || minBLusdAmount === Decimal.ZERO) return;
       if (minLusdAmount === undefined || minLusdAmount === Decimal.ZERO) return;
@@ -89,7 +90,7 @@ export const WithdrawPane: React.FC = () => {
         minLusdAmount
       });
     } else {
-      const minAmount = withdrawal.get(output);
+      const minAmount = withdrawal.get(output)?.mul(1 - curveSlippage);
 
       if (minAmount === undefined || minAmount === Decimal.ZERO) return;
 
@@ -100,7 +101,7 @@ export const WithdrawPane: React.FC = () => {
         minAmount
       });
     }
-  };
+  }
 
   const handleBackPressed = () => {
     dispatchEvent("BACK_PRESSED");
@@ -235,4 +236,4 @@ export const WithdrawPane: React.FC = () => {
       </Flex>
     </>
   );
-};
+};;