updated gas price logic after london

Author: aalavandhan

package.json

@@ -15,7 +15,7 @@
     "bnc-onboard": "1.19.2",
     "clsx": "^1.1.1",
     "dayjs": "^1.9.1",
-    "ethers": "^5.0.17",
+    "ethers": "^5.4.4",
     "formik": "^2.2.0",
     "history": "^5.0.0",
     "react": "^16.13.1",

src/Contexts/ChainbridgeContext.tsx

@@ -364,6 +364,15 @@ const ChainbridgeProvider = ({ children }: IChainbridgeContextProps) => {
         homeChain.approvalContract
       );
 
+      // NOTE: gasPrice, from web3-context doesn't work anymore
+      const gasLimit = 500000;
+      const currentGasPrice = await signer.getGasPrice();
+      const txGas = BigNumber.from(
+        homeChain.defaultGasPrice ?
+          utils.parseUnits(homeChain.defaultGasPrice.toString(),9) :
+          currentGasPrice
+      ).toString()
+
       if (Number(utils.formatUnits(currentAllowance, erc20Decimals)) < amount) {
         // if (
         //   Number(utils.formatUnits(currentAllowance, erc20Decimals)) > 0 &&
@@ -390,14 +399,7 @@ const ChainbridgeProvider = ({ children }: IChainbridgeContextProps) => {
           await erc20.approve(
             homeChain.approvalContract,
             BigNumber.from(utils.parseUnits(amount.toString(), erc20Decimals)),
-            {
-              gasPrice: BigNumber.from(
-                utils.parseUnits(
-                  (homeChain.defaultGasPrice || gasPrice).toString(),
-                  9
-                )
-              ).toString(),
-            }
+            { gasPrice: txGas, gasLimit }
           )
         ).wait(1);
       }
@@ -420,10 +422,8 @@ const ChainbridgeProvider = ({ children }: IChainbridgeContextProps) => {
           token.resourceId,
           data,
           {
-            gasPrice: utils.parseUnits(
-              (homeChain.defaultGasPrice || gasPrice).toString(),
-              9
-            ),
+            gasPrice: txGas,
+            gasLimit,
             value: utils.parseUnits((bridgeFee || 0).toString(), 18),
           }
         )